Laarsen Associates Swimming Pool Heater LG LD User Manual

Installation and Operation Data  
FOR YOUR SAFETY - This product must be installed and serviced by a profes-  
sional service technician, qualified in pool heater installation. Improper installa-  
tion and/or operation could create carbon monoxide gas in flue gases which  
could cause serious injury, property damage, or death. Improper installation  
and/or operation will void the warranty.  
Installation and  
Operation Manual  
Laars Lite 2  
Pool and Spa Heater  
Models LG and LD  
Natural Gas or LP Gas  
NOTE: LD LP Gas For  
Outdoor Use Only  
WARNING: If these instructions are not followed exactly, a fire or explosion  
may result, causing property damage, personal injury, or death.  
Do not store or use gasoline or other flammable vapors and liquids in the vicinity  
of this or any other appliance.  
WHAT TO DO IF YOU SMELL GAS  
• Do not try to light any appliance.  
• Do not touch any electrical switch; do not use any phone in your building.  
• Immediately call your gas supplier from a nearby phone. Follow the gas  
supplier’s instructions.  
• If you cannot reach your gas supplier, call the fire department.  
Installation and service must be performed by a qualified installer, service agency,  
or the gas supplier.  
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Model LG & LD Pool and Spa Heater  
Page 1  
with the installation. Consult the Waterpik Laars  
SECTION 1.  
General Information  
factory, or local factory representative, with any  
questions regarding this equipment. Experience has  
shown that most operating problems are caused by  
improperinstallation.  
1A. Introduction  
The Laars Lite 2 heater is design certified by  
International Approval Services (formerly American  
Gas Association and Canadian Gas Association) as  
complying with the latest edition of the Standard for  
This manual provides installation and operation  
instructions for the Laars Lite 2, Model LG and LD  
pool and spa heaters. Read these installation and  
operationinstructionscompletelybeforeproceeding  
(920 cm)  
VentingDimensions  
Model  
Size  
Heater  
Width  
U.S. Indoor or  
Firing Rate / Hr.  
(1,000's)  
Vent  
Diameter  
U.S.Outdoor  
Dim "H"  
CANOutdoor  
Shelter Dim "H"  
in  
(cm)  
in  
5
6
7
8
9
(cm)  
in  
(cm)  
(23)  
(24)  
(26)  
(27)  
(34)  
in  
(cm)  
BTU  
125  
175  
250  
325  
400  
(kcal)  
(31.5)  
(44.1)  
(63)  
125  
175  
250  
325  
400  
15  
(38)  
(12.7)  
(15.2)  
(17.8)  
(20.3)  
(22.9)  
9 1/8  
9 3/4  
10  
16 1/4  
24 1/8  
25 1/4  
26 1/2  
27 1/2  
(41.3)  
(61.3)  
(64.1)  
(67.3)  
(69.9)  
18  
(45.7)  
(57.2)  
(67.9)  
(80.6)  
22 1/2  
26 3/4  
31 3/4  
10 5/8  
13 1/4  
(81.9)  
(101)  
Notes:  
1. In Canada, derate BTU/Hr input and output 10 percent for altitudes of 2,000 to 4,500 feet (609 to 1372 m) above sea  
level. No derating necessary up to altitude of 2,000 feet (609 m). In United States derate input 4 percent for each 1,000  
feet (305 m) above sea level, starting at 2,000 feet (609m).  
2. The Laars Lite 2 is constructed for 75 psi working pressure.  
3. Ratings shown are for both natural and propane gas.  
Figure 1. General Configuration.  
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WATERPIK TECHNOLOGIES INC.  
Page 2  
Gas-Fired Pool Heaters, ANSI Z21.56, and in Canada  
with CAN1-4.7-M85.  
Certain sections of this manual are specific to  
either United States or Canadian installations, and are  
labeled as such.  
SECTION 2.  
InstallationInstructions  
2A. General Information  
Install the Laars Lite 2 heaters, vent caps and  
drafthoods in accordance with the procedures in this  
manual, local codes and ordinances, and in accordance  
with the latest edition of the National Fuel Gas Code,  
ANSI Z223.1. In Canada, the installation must be in  
accordance with CAN1-B149.1 or .2 and local codes.  
The authority having jurisdiction may require that the  
installation conform to the Standard for Gas-Fired  
Heaters, ANSI Z21.56. Any changes to the heater, gas  
controls, gas orifices, wiring, draft diverter, or im-  
proper installation may void the warranty. If field  
conditions require change to any of the above, consult  
the factory.  
1B. Description  
The Laars Lite 2 LD heater gets electrical power  
from an external 120VAC or 240VAC source and  
provides a dual thermostat Flex-Temp control system  
for pool/spa combinations or preheat convenience. The  
Laars Lite 2 LD heater also meets the California, New  
York, Hawaii, and Oregon state energy requirements  
for intermittent ignition gas appliances. The Laars Lite  
2 LG heater is a self contained standing pilot unit and  
requires no external power.  
The Laars Lite 2 heater is specifically designed  
for heating swimming pools and spas. Do not use it as  
a general service water heater. There is a specially  
designed model of Laars Lite 2 for heating salt water  
pools. Consult your dealer for the appropriate  
Waterpik Laars products for these applications.  
All gas-fired products require correct installation  
to assure safe operation. The requirements for pool  
heaters include the following:  
1. Field assembly (if required)  
2. Appropriate site location (clearances) and  
flooring  
1C. Warranty  
3. Sufficient combustion and ventilation air  
4. Properly sized gas meter and piping  
5. Proper electrical wiring (if required)  
6. Adequate water flow  
The Laars Lite 2 heater is sold with a limited  
factory warranty. Details are specified on the back  
cover of this manual. A copy of the warranty and a  
warranty registration card are included in the plastic  
bag shipped with the heater. Fill out and return the  
warranty registration card.  
Make all warranty claims to an authorized  
Waterpik Laars representative or directly to the  
factory. Claims must include the heater serial number  
and model (this information can be found on the rating  
plate), installation date, and name of the installer.  
Shipping costs are not included in the warranty cover-  
age.  
This manual provides the information needed to  
meet these requirements. Review all application and  
installationprocedurescompletelybeforecontinuing  
the installation.  
2B. Field Assembly  
The Laars Lite 2 heater is shipped from the  
factory with the top assembly in the low-profile  
configuration for outdoor installation in the U.S. In  
Canada, an outdoor installation requires the addition of  
a factory approved vent cap. The Laars Lite 2 heater is  
design certified for indoor installation when equipped  
with a drafthood, which must be installed without  
modification.  
The Laars Lite 2 heater is also certified for  
installation in an outdoor shelter in Canada when  
equipped with a drafthood. An outdoor shelter is an  
enclosure not normally occupied which does not  
communicate directly with occupied areas.  
Check the rating plate on the heater or the Parts  
List (Sec. 4) of this manual for the correct Waterpik  
Laars drafthood or vent cap part number. See instruc-  
tions supplied with the drafthood or vent cap for  
installation and attachment. When the drafthood is  
used, locate the heater so as to be in the same atmo-  
spheric pressure zone as the combustion air inlet to the  
heater.  
Damage caused by improper installation or  
assembly, or to the heat exchanger by corrosive water,  
is NOT covered by the Warranty. See Section 3D for  
maintaining proper pool water chemistry.  
NOTE: Keep this manual in a safe place for  
future reference when inspecting or servicing the  
heater.  
1D. Technical Assistance  
Consult Waterpik Laars or your local distributor  
with any questions or problems involving the specifica-  
tions, installation, and operation of your Waterpik  
Laars equipment. An experienced technical support  
staff is ready to assist in assuring the proper perfor-  
mance and application of Waterpik Laars products.  
For technical support call (415) 382-8220 extension  
260.  
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Model LG & LD Pool and Spa Heater  
Page 3  
Notes:  
1. An Underwriters' Laboratories listed vent cap is required to prevent downdraft and allow the heater to function properly  
and safely.  
2. Use approved roof jack.  
Figure 2. Indoor Installation Venting (USA), or Outdoor Shelter (Canada).  
Table 1. Air Openings to Outside.  
RequiredNetFreeOpenArea  
forCombustionAirOpenings  
2C. Site Location  
WARNING  
Directfromoutside  
Duct from outside  
Improper installation or maintenance can  
cause nausea or asphyxiation from carbon  
monoxide in flue gases which could result in  
severe injury, or death.  
Model  
125  
175  
in2  
(cm2)  
(206)  
(284)  
(406)  
(429)  
(645)  
in2  
(cm2)  
(413)  
(568)  
(813)  
(1058)  
(1290)  
32  
44  
64  
88  
250  
63  
126  
164  
200  
325  
400  
82  
100  
2C-1. Installation Information  
Note: If using screens and/or louvers, compensate by adding 50%  
additional area to each opening.  
Avoid placing the heater in locations where it can  
cause damage by water or condensate leakage. If this is  
not possible, provide a suitable drain pan to catch and  
divert any leakage. The pan must not block natural  
flow of air around the heater.  
Locate the heater so the clearances from combus-  
tible surfaces shown in Table 2 are met.  
When a drafthood is used, it must be connected to  
a vent pipe which stops at least 2 feet (0.61 meters  
[m]) above the highest point of the roof or other object  
that is within 10 feet (3.05 m) from the vent termina-  
tion. The vent pipe must have a listed vent cap which  
allows a full equivalent opening for flue products (see  
Figure 2).  
Table 2. Minimum Heater Clearances From Combustible Surfaces  
Indoor (Outdoor Shelter) Installation  
Outdoors Installation  
U.S. Canada  
U.S.  
Canada  
(
)
(
)
(
(
(
)
)
)
(
cm  
)
Side of Heater  
Blank  
inch  
6
cm  
inch  
6
cm  
inch  
6
cm  
32  
32  
inch  
6
(
(
(
)
)
)
(
)
)
)
(
15.2  
)
)
)
15.2  
15.2  
30.5  
15.2  
15.2  
45.7  
(
(
(
15.2  
Rear  
6
6
6
6
(
)
(
Piping  
12  
44  
18  
18  
44  
36  
12  
30.5  
18  
45.7  
(
)
(
)
Top  
111.7  
111.7  
Open Unroofed Area  
(
)
(
)
(
)
(
)
Front  
45.7  
91.4  
18  
45.7  
36  
91.4  
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WATERPIK TECHNOLOGIES INC.  
Page 4  
2C-2. Outdoor Installation  
feet (0.91 m) from vertical surfaces (e.g., nearby  
buildings and walls). The addition of a vent cap may  
be necessary.  
Laars Lite 2 heaters can be installed in the low-  
profile, grate top configuration (U.S.A. only) as  
received from the factory, or with an optional high  
wind vent cap/stack. Canadian units require a factory  
approved vent cap.  
2C-3. Flooring - Typical Installation  
Do not install the heater directly on a combus-  
tible wood or carpet floor without placing a noncom-  
bustible platform between the floor and the heater. In  
the United States, the National Fuel Gas Code allows a  
heater to be placed on a combustible surface when  
there is a platform under the heater made of hollow  
masonry no less than 4 inches (102 millimeters [mm])  
Figure 3. Outdoor Heater Installation.  
Locate the heater in an open, unroofed area. Do  
not install the heater under a deck. Do not locate the  
heater below or adjacent to any doors, glass openings,  
louvers, grills, etc., which connect in any way with an  
inhabited area of a building, even though the access  
might be through another structure (e.g., a garage or  
utility room. In the United States there must be a  
minimum of 4 feet (1.22 m) horizontally or vertically  
between the heater and any door, glass opening, or  
gravity inlet to a building. In Canada this distance  
must be at least 10 feet (3.0 m) (see Figure 3).  
WARNING  
United States  
Do not install the heater with the top of the  
vent assembly within 4 feet (1.22 m) of any  
opening into a building.  
Notes:  
1. Blocks must provide solid base and be braced so they  
cannot slip out of place.  
2. Air openings in blocks must be arranged to provide  
unrestricted opening through entire width or length of  
base.  
Canada  
Do not install the heater with the top of the  
vent assembly within 10 feet (3.05 m) of any  
opening into a building.  
Figure 4. Non-Combustible Platform.  
thick, covered with sheet metal at least 24 gauge thick  
and extending beyond the full width and depth of the  
heater by at least 6 inches (76.2 mm) in all directions.  
The masonry must be laid with ends unsealed, and  
joints matched to provide free circulation of air from  
side to side through the masonry (see Figure 4). If the  
heater is installed in a carpeted alcove, the entire floor  
of the alcove must be covered by a noncombustible  
panel. You can obtain a noncombustible base from  
Waterpik Laars, see the Parts List (Sec. 4) of this  
manual.  
If the heater is installed under an overhang, there  
must be a minimum clearance of 5 feet (1.5 m) above  
the top of the heater and the structure should not  
overhang the heater more than 12 inches (0.30 m). The  
area under the overhang must be open on three sides.  
This prevents combustion gases from being diverted  
into living areas through doors, windows, or gravity  
inlets.  
If the heater is installed close to a structure,  
protect it from rain water runoff with rain gutters on  
the roof or other measures. Do not locate the heater  
near sprinkler systems that could spray water on it.  
Avoid locations where wind deflection off nearby  
structures might cause downdraft conditions. Where  
downdraft conditions exist, locate the heater at least 3  
2C-4. Indoor and Outdoor Shelter  
Installations  
All indoor installations and outdoor shelter  
installations (Canada) require the addition of a factory  
approved drafthood. The drafthood must be installed  
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Model LG & LD Pool and Spa Heater  
Page 5  
without modification and in accordance with all local,  
state, provincial and national codes.  
Proper ventilation of exhaust and combustion air  
are essential for the safe operation of the heater.  
Manual Shutoff  
Valve  
2D. Combustion and Ventilation Air  
Supply  
Gas Supply  
Inlet  
Union  
All indoor installations must have openings to  
outside air for combustion, ventilation, and dilution of  
flue gases from inside the building (see Figure 2 and  
Table 1). Waterpik Laars does not recommend indoor  
installations that do not provide combustion air from  
outside the building.  
T-Fitting  
To  
Equipment  
Inlet  
3" Min.  
(76 mm)  
Nipple  
All outdoor shelter installations (Canada only)  
must have uninterrupted openings to outside air for  
combustion and ventilation. The installation must be in  
accordance with the latest edition of CAN/CGA B149.  
Waterpik Laars does not recommend outdoor shelter  
installations that depend on internal air for combustion.  
Combustion air should be ducted to the heater from  
outside the structure.  
If the heater is installed in a residential garage, or  
where flammable vapors will be present, the  
burners must be 18 inches (457 mm) above the garage  
floor. Refer to the latest edition of the National Fuel  
Gas Code for more information. In Canada, refer to the  
latest edition of the Gas Installation Code, CAN/CGA  
B149.  
Cap  
Figure 5. The proper design for a sediment trap / drip  
leg.  
a. High altitude (H) - 3,000 to 6,000 feet (915 to  
1,830 m) for natural gas and 5000 to 10,000  
feet (1525 to 3050 m ) for propane gas.  
b. High altitude (J) - 6,000 to 10,000 feet (1830  
to 3,050 m)  
3. In Canada, the heater rating plate is marked for  
specific altitude requirements: lo altitude is 0 to  
2,000 feet (0 to 610 m) and high altitude (H) is  
2,000 to 4,500 feet (610 to 1,370 m) above sea  
level for natural gas and 0 to 4500 feet (0 to 1370  
m) for propane gas.  
2E. Gas Supply and Piping  
2E-1. General Instructions  
Review the following general instructions before  
continuing the installation.  
4. Use the figures in Table 3 to size the gas inlet  
piping from the gas meter to the heater. Check all  
local codes for compliance before installing the  
heater.  
WARNING  
Do not convert this heater from natural gas to  
propane gas, or propane to natural. Field  
conversion could create carbon monoxide gas  
which can cause property damage, serious  
injury, or death.  
Table 3. Natural Gas Pipe Size Requirements  
Distance from Gas Meter  
0-50 feet  
(0-15 m)  
50-100 feet  
(15-30 m)  
100-200 feet  
(30-60 m)  
Heater  
Size  
in. (mm)  
in.  
(mm)  
in.  
(mm)  
125  
3/4 (19)  
1
(25.4)  
1
(25.4)  
1. Gas piping installation must be in accordance  
with the latest edition of ANSI Z223.1 and all  
local codes. In Canada, the installation must be in  
accordance with CAN- B149.1 or .2 and all local  
codes that apply.  
175  
250  
1
1
(25.4)  
1
(25.4)  
1-1/4  
1-1/4  
1-1/2  
1-1/2  
(31.75)  
(31.75)  
(38)  
(25.4) 1-1/4 (31.75)  
325 1-1/4 (31.75) 1-1/4 (31.75)  
400 1-1/4 (31.75) 1-1/2  
(38)  
(38)  
Notes:  
2. Check the rating plate to make sure the heater is  
fitted for the type of gas being used. Waterpik  
Laars heaters, as shipped from the factory, are  
certified to operate at an altitude of 0 to 3000 feet  
(0 to 915 m) for natural gas and 0 to 5000 feet (0  
to 1525 m) for propane gas in the United States.  
Or if so ordered, at higher altitudes. For higher  
altitudes, the heater manifold is marked with a  
tag or sticker indicating one of the following high  
altitude operation codes:  
1. These numbers are for natural gas (0.65 Sp. Gr.) and are  
based on 1/2 inch (13 mm) water column pressure drop.  
Check supply pressure with a manometer, and local code  
requirements for variations. For liquefied petroleum gas,  
reduce pipe diameter one size, but maintain a 3/4 inch  
(13 mm) minimum diameter.  
2. Check supply pressure and local code requirements  
before proceeding with work.  
3. Pipe fittings must be considered when determining gas  
pipe sizing.  
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WATERPIK TECHNOLOGIES INC.  
2F. Electrical Wiring  
Page 6  
Table 4. Gas Supply Pressure Requirements  
Supply Pressure  
Water Column  
Natural Gas  
in. (mm)  
Propane Gas  
in. (mm)  
Caution  
Label all wires prior to disconnection when  
servicing controls. Wiring errors can cause  
improper and dangerous operation.  
Verify proper operation after servicing.  
Minimum  
Maximum  
5.5 (140)  
10.0 (254)  
10.0 (254)  
14.0 (356)  
5. Install a sediment trap (drip leg) ahead of the gas  
controls (see Figure 5). Fit the trap with a  
Attention  
Au moment de l'entretien des commandes,  
étiquetez tous les fils avant de les débrancher.  
Des erreurs de câblage peuvent entraîner un  
fonctionnement inadéquat et dangereux.  
threaded cap which can be removed for cleaning.  
6. Install a manual gas shutoff valve for service and  
safety. Do not use a restrictive gas cock. DO  
NOT USE FLEXIBLE GAS PIPING.  
2F-1. General Information (LD Only)  
Wiring connections must be made exactly as  
shown in the wiring diagram found on the inside of the  
heater (see Figures 6 and 7 for typical examples) . The  
heater must include a definite means of grounding.  
There is a bonding lug on the right side of the heater,  
where a bond wire must be attached.  
7. Disconnect the heater and its individual shutoff  
valve from the gas supply system during pressure  
testing of the system at pressures higher than 1/2  
pounds per square inch (psi) (3.45 kilopascals  
[kPa]). If the test pressure is equal to or less than  
1/2 psi (3.45 kPa), close the manual shutoff valve  
on the heater during the piping pressure test.  
The heater comes factory-wired intended for  
use with 240 Volt, 60 Hz AC field electrical supply.  
To use 120 Volt, 60 Hz AC requires rewiring of the  
heater. This should be done by a certified electrician  
only, as with all wiring. To wire the heater for 120  
Volt, 60 Hz AC, follow the alternate 120V wiring  
method depicted in Figure 6. Additionally, the ignition  
control module must be rewired. The wire from the  
terminal marked IGN/240 must be removed from that  
terminal and placed on the terminal marked IGN/120.  
Electrical wiring must be in accordance with the  
latest edition of the National Electric Code (NEC),  
ANSI/National Fire Protection Association (NFPA)  
70, unless local code requirements indicate otherwise.  
Caution  
Permanent damage to the gas valve will occur  
if the following procedures are not followed.  
8. If the gas supply pressure is less than required,  
check for undersized pipe between the meter and  
the heater, a restrictive fitting, or an undersized  
gas meter. Gas supply pressures to the heater are  
listed in Table 4.  
NOTE: The maximum inlet gas pressure must  
not exceed the specified value. The minimum value  
listed is for the purpose of input adjustment. Refer to  
Table 4.  
To wire the Laars Lite 2 model LD heater to a  
120V or 240V /60 Hertz (Hz) electrical source:  
9. Before operating the heater, test the complete gas  
supply system and all connections for leaks using  
a soap solution. Do not use an open flame.  
1. Remove the screw located to the lower right side  
of the transformer and open the hinged cover of  
the wiring enclosure.  
Caution  
2. Connect the wires from the power source to the  
leads on the right side of the heater in the space  
behind the ignition control (see Figure 8). Be sure  
to follow the wiring diagram on page 7 to config-  
ure the transformer for the correct input voltage.  
Some leak test solutions (including soap and  
water) may cause corrosion or stress cracking.  
Rinse the piping with water after testing.  
2E-2. Special Precautions for Propane  
Gas  
3. Attach the ground wire to the green ground screw  
located on the back panel of the wiring enclosure.  
Liquefied petroleum (LP) gas is heavier than air.  
Therefore, do not install pool heaters using LP gas in  
pits or locations where gas might collect. Locate  
heaters a safe distance from LP gas storage and filling  
equipment. Consult local codes and fire protection  
authorities about specific installation restrictions.  
4. Close the cover of the wiring enclosure and  
replace the screw to hold it in place.  
5. Connect a bonding wire (8 ga copper) to the  
bonding lug on the right side of the heater.  
NOTE: No external junction box is required.  
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Model LG & LD Pool and Spa Heater  
Page 7  
MODEL LD WIRING DIAGRAM  
NOTE:  
IF O RIG INAL W IR E SU PPLIED W ITH HEATER  
MU ST BE R EPLAC ED , APPLIANCE W IR IN G  
MATER IAL RATED AT 105 OC SH ALL BE USED.  
HSI IGNITION WIR E  
O F F  
FACTORY WIRED - 120 V/240 V  
FIELD WIRED - 120V /240V  
FACTORY WIRED - 24 V  
P O O L  
S PA  
W IR ING SHOW N AS  
SHALL USE  
APPLIAN CE W IR ING MATER IAL RATED AT 200 OC.  
REMOTE  
CONNECTOR  
FIREMAN  
SW ITC H  
B K  
TRANSFOR MER  
FUSIBLE  
LIN K  
E LE C .  
F U S E  
120-240 V  
CONNECTION  
LIMIT  
LIMIT  
W
W
W
W
B K  
B K  
R
Y
240V  
W /R  
W /B K  
R
60 Hz  
G /Y  
WATER  
TEM P  
SENSOR  
PRESSU RE  
SWITC H  
SINGLE  
PHASE  
R
G
W IRE TO IG N/120  
FOR 120 VO LTS  
ATTACH  
GROUND  
WIRE  
Y /BK  
W
IG N /1 20  
IG N /2 40  
(LI)  
(L2 )  
IG N  
W IRE TO IG N/240  
FOR 240 VO LTS  
B K  
HERE  
W
W
R
HONEYWELL  
GAS VALVE  
IGNITION CONTROL  
(FENWAL)  
0533  
F S  
T H  
VALVE  
B R  
A LT ER N ATE 120 V W IR IN G  
B K  
M V1  
M V2  
TR ANSFORMER  
120-240V / 24 V  
G N D  
B K  
Y
W /R  
W /B K  
R
F L AM E SE N SE R O D  
W
R
Y
G
ATTACH  
B K  
GROUND  
WIRE  
IG N IT E R  
R
(L1 )  
(L2 )  
a) Connection Diagram  
HERE  
L 2  
L 1  
240VCONNECTION  
SHOWN  
Y
TRANSFORMER  
24 V  
R
BK  
W
BR  
Y
R
O
Y/BK  
-
-
-
-
-
-
-
Black  
White  
Brown  
Yellow  
Red  
Orange  
Yellow & Black  
135O  
HI-LIMIT  
SWITCH  
F
FUSIBLE  
LINK  
150O  
HI-LIMIT  
SWITCH  
F
PRESSURE  
SWITCH  
FIREMAN  
SWITCH  
CONNECTOR  
ELECTRICAL  
FUSE  
1-25 AMP  
W/BK - White & Black  
W/R  
G/Y  
-
-
White & Red  
Green & Yellow  
SPA SET POINT  
POOL SET POINT  
OFF  
B K  
CIRCUIT  
B K/Y  
SEN  
SEN  
GND  
W
W
WATER TEMPERATURE  
SENSOR  
TH  
G N D  
FS  
VALVE  
W
L2  
IGN  
L1  
IGN120  
or  
IGN240  
IGNITION  
W
CONTROL  
H /W G AS VALVE  
M V1 M V2  
IGNITOR  
B R  
Y
W
FLAME SENSOR  
b) Schematic Diagram  
H0236300-  
Figure 6. LD Connection/Schematic Wiring Diagram.  
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WATERPIK TECHNOLOGIES INC.  
Page 8  
efficient operation by removing any residual heat  
contained in the heat exchanger back to the pool.  
2F-2. Auxiliary Time Clock Wiring  
If you install a time clock to control the filter  
(LD)  
pump operation, it is recommended that the time clock  
have its own low voltage (Fireman’s) switch to turn off  
the heater before turning off the pump. The switch  
should shut off the heater about 15 minutes before the  
filter pump shuts off. This will allow for a more  
Caution  
Do not provide power to the heater from the  
high voltage side of the time clock. Doing so  
may cause damage to the heater or  
surrounding plumbing.  
MILLIVOLT HEATER WIRING DIAGRAM  
High  
Limit  
Switch  
High  
Limit  
Switch  
TEMP. CONTROL  
On  
Off  
Connection  
Diagram  
Min  
Max  
BK - Black  
W
Y
R
O
-
-
-
-
White  
Yellow  
Red  
O
O
W
W
Orange  
Fireman  
Switch  
BK  
Connection  
BK  
W
W
Y
Y
BK  
Y
Fusible  
Link  
Pressure  
Switch  
W
Y
TH  
BK  
Y
PP/TH  
W
Y
PP  
Pilot  
Gen  
Piezo  
Sparker  
R
W
Pilot  
IF ANY OF THE ORIGINAL WIRE AS  
SUPPLIED WITH THE HEATER MUST BE  
R E P LA C E D , A P P LI A N C E W IR IN G  
MATERIAL RATED FOR 105°C MUST BE  
USED. WHERE MARKED THUS  
APPLIANCE WIRING MATERIAL FOR  
200°C MUST BE USED.  
Piezo  
Sparker  
_
W
+
R
To Pilot  
Generator  
PP  
Y
Y
PP/TH  
Pilotstat  
Power  
Unit Coil  
W
TH  
TH/PP  
BK  
BK  
Valve  
Operator  
Coil  
CIRCUIT  
PP  
Y
H0166000G  
Figure 7. LG Connection/Schematic Wiring Diagram  
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Model LG & LD Pool and Spa Heater  
Page 9  
2F-3. Remote Operation  
(Model LD Only)  
The Laars Lite 2 pool/spa heater controls can  
be wired for remote operation. The CS-02 remote  
control permits switching from one temperature  
controller to the other and turning the heater on and  
off from a remote location. The CS-04 includes the  
same features as the CS-02 plus a remote tempera-  
ture controller. Contact Waterpik Laars for further  
information. Reference part numbers CS-02 and  
CS-04.  
An interrupt (on/off) type remote can be  
connected by removing the jumper wire on the terminal  
block located in the control compartment (see Figure 6)  
and connecting the two wires from the remote to the  
two terminals on the terminal block. This type of  
remote control will turn the heater on or off, but will  
not switch between the two temperature controllers on  
the temperature control panel or allow for temperature  
adjustments.  
Figure 8. Field Wiring Connections (LD).  
To connect a 3-wire remote (not supplied by  
Waterpik Laars) to a Laars Lite 2 LD heater, order a  
wire harness assembly (part No. E0120000) which  
connects to the temperature control panel. Installation  
instructions are included with the wire harness assem-  
bly.  
Consult with Waterpik Laars Service Department  
with questions about installing remotes other than  
Waterpik Laars.  
2G. Water Flow System  
2G-1. Flange Installation  
The heater has 2" NPT universal header cou-  
plings. You can connect threaded 2" NPT iron pipe,  
unthreaded 1-1/2" iron pipe, 1-1/2" or 2" copper pipe  
without an adapter (see Figure 10).  
Plastic piping (PVC Schedule 40) can be con-  
nected to the heater if local codes allow it, by using the  
CPVC nipples included with your heater.  
Figure 9. Time Clock Wiring.  
To install a time clock auxiliary switch into the  
heater wires (see Figure 9):  
1. Remove heater door.  
2. Remove the factory installed wire between  
terminals 1 and 2 on the terminal strip (see Figure  
9).  
To install plastic piping (see Figure 11):  
1. Remove CPVC nipples from plastic bag.  
3. Connect the wires from the time clock auxiliary  
switch to the two terminals. Use American Wire  
Gage (AWG) No. 14 gauge stranded copper wire  
with a temperature rating of 221°F (105°C) or  
greater.  
2. Screw CPVC nipples into metal flange until tight,  
using teflon tape on plastic threads.  
3. Attach PVC plumbing to CPVC pipes using PVC  
to CPVC cement only.  
The length of the wire between the heater and the  
time clock should not exceed 10-15 feet (4.57 m). The  
contact points of the time clock switch should be silver,  
or a low resistance alloy.  
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WATERPIK TECHNOLOGIES INC.  
Page 10  
2G-2. Reversible Water Connections  
Waterpik Laars ships the Laars Lite 2 heater with  
the water connections on the right side. The Laars Lite  
2 heater can be installed with the water connections on  
either side. It could be necessary, or helpful, to switch  
the connections to the left side to improve access for  
installation and service. Perform this modification  
before installing the heater using the following proce-  
dures:  
REAR RAIN SHIELD  
PANEL OMITTED ON  
CANADIAN MODELS  
TRANSITION PLATE  
TOP OMITTED ON US  
MODELS  
Figure 10. Piping installation.  
RUBBER  
JACKET/PLUG  
GROMMET  
Figure 11. Plastic piping connections.  
Figure 12. Heat exchanger reversal.  
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Model LG & LD Pool and Spa Heater  
Page 11  
1. Remove heater door.  
(see Figure 14). Pull pressure switch tube through  
the hole in the vestibule cover and into the vesti-  
bule (controls compartment), then pull thermostat  
bulb assembly through same hole (see Figure 15).  
2. If there is a vent cap or drafthood (indoor) on top  
of the heater, remove it.  
3. Remove all 8 hex-head screws fastening the top  
and lift the top assembly straight up (see Figure  
12).  
12. When removing the heat exchanger from the  
heater, the end baffles of the heat exchanger must  
be removed. There are two baffles covering part  
of the front and rear tubes of the heat exchanger.  
Each baffle is held in place by two screws which  
mount to the top of the combustion chamber wall.  
Remove the screws and the baffles before at-  
tempting to lift the heat exchanger out of the  
heater (see Figure 16).  
4. Remove rainshield assembly and set it aside.  
5. Remove screws that fasten the gap closures to the  
jacket and put them aside. Remove gap closures.  
6. Remove the screws securing the two flue collec-  
tor hold down clamps and remove the clamps (see  
Figure 13). Remove flue collector.  
7. Remove the three rubber jacket/plug grommets  
and drain plugs (see Figure 12). One is located  
under the water connections on the right side. The  
other two are on the left side toward the front of  
the heater.  
Caution  
It may be necessary to have help lifting the  
heat exchanger out and replacing it.  
8. Tag and disconnect the white wire on the pressure  
switch (PS) and the white wire on the Fireman's  
switch terminal (see Figure 6 or 7) which leads to  
the high limit switch.  
9. Remove plastic tie wraps and pull the white wires  
out of the front compartment through the vesti-  
bule cover and coil them on the heat exchanger.  
10. Unscrew the brass compression fitting securing  
the pressure switch to the inlet/outlet header.  
Remove tube from header and gently bend it out  
of the way.  
11. Loosen the screw securing the temperature sensing  
bulb retainer bracket. Slide the retainer bracket off  
the bulb flange and remove the bulb from the header  
Figure 14. Temperature sensing bulb.  
H O LD D O W N  
C LA M P  
IN/O U T H E AD E R  
(U.S. MODELS  
ONLY)  
LEFT  
VESTIBULE  
COVER  
RIGHT  
VESTIBULE  
COVER  
B R AC K ET  
Figure 13. Flue collector hold-down brackets.  
FRONT  
PLASTIC BUSHING  
Figure 15. Vestibule covers.  
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WATERPIK TECHNOLOGIES INC.  
Page 12  
20. Connect the white wire labeled PS to the pressure  
switch and the other white wire to its original  
location on the Fireman's switch.  
HeatExchanger  
End Baffles  
21. Reinstall the drain plugs and tighten securely.  
Replacejacket/pluggrommets.  
HeatExchanger  
Combustion  
ChamberWall  
22. Install the flue collector assembly. Be sure the  
front and rear panels of the flue collector are  
installed into the grooves on the front and rear  
combustion chamber heat shield panels. Be sure  
the sheet metal panels are not pinching any wires.  
23. Attach the flue collector hold down clamps to the  
clips located under the two center header bolts.  
24. Replace the gap closures and tighten the screws  
securely.  
Figure 16. Heat exchanger and end baffles.  
25. Double-check to make sure the wiring is not  
pinched against sharp edges, or resting on the flue  
collectorassembly.  
13. Lift the heat exchanger assembly out of the  
heater. Reinstall heat exchanger 180 degrees  
(inlet/outlet header left) from it's original posi-  
tion.  
26. Reinstall rainshield assembly.  
27. Replace the top assembly. Make sure the tabs are  
outside the heater jacket. Fasten the top assembly  
with the hex-head screws.  
14. After replacing the heat exchanger into the heater,  
the end baffles must be replaced. Each one is  
held in place by two screws which mount to the  
top of the combustion chamber wall. Reinstall the  
baffles on the front and rear of the heat exchanger  
before continuing with the "Reversible Water  
Connections"procedure.  
28. Install plastic tie wraps on wiring in the vestibule  
(controlscompartment).  
29. Install heater door.  
30. Reinstall the vent cap or drafthood, if one was  
removed.  
15. Remove pressure switch retainer (plastic cable  
clamp) from the inner panel (allow pressure  
switch to float).  
2G-3. Check Valve Installation  
Install a check valve if there is any chance of back-  
siphoning when the pump stops. Do not install any other  
valve in the piping between the heater outlet and the  
pool, unless it is being used as a diverter valve.  
16. On U.S. models reroute pressure switch tube and  
thermostat bulb assembly through hole in left side  
of vestibule cover in reverse order. Canadian  
models have no cover on the left side of the  
vestibule. Relocate the pressure switch tube and  
temperature sensor through the open side of the  
vestibule.  
2G-4. Chlorinators, Ozone Generators,  
and Sanitizing Chemicals  
The Waterpik Laars Lite 2 heater is manufac-  
tured with materials that are not compatible with high  
concentrations of ozone, chlorine, bromine, or other  
sanitizing chemicals. Heater damage caused by exces-  
sive chemicals or improper ozonization is not covered  
by the Waterpik Laars warranty. Be sure to adhere to  
thefollowing:  
17. Reinstall the temperature sensing bulb in the  
header, and fasten it with the retainer bracket and  
screw.  
18. Reinstall the compression fitting at end of pres-  
sure switch tube into inlet/outlet header and  
tighten the fitting.  
When ozone is injected upstream of the heater,  
install an offgas mixing chamber, or an ozone  
bypass system between the heater and the ozone  
injector to prevent ozone and air from entering  
the heater.  
19. Route the white wiring from the high limit  
switches beside the heat exchanger and down to  
the original location following the pressure switch  
tubing. Secure white wires to the pressure switch  
tube with plastic wire ties.  
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Model LG & LD Pool and Spa Heater  
Page 13  
When chemical feeders are used, plumb the  
feeder downstream of the heater and install an in-  
line check valve between the heater and the feeder  
(a minimum of 18" is required between the heater  
and the check valve).  
Never deposit chemicals directly in the pool  
skimmer.  
2G-4a. Water Chemistry  
Proper chemical balances are necessary for  
sanitary bathing conditions as well as ensuring your  
heater's long life. Be sure to keep your chemical levels  
within the values indicated in Table 7. Waterpik  
Laars does not warrant heat exchangers damaged  
by corrosive chemical levels or excess dissolved  
solids in pool or spa water.  
For spas, it is also necessary to perform water  
changes in addition to chemical treatment. It is recom-  
mended to change the spa water every 60 days for light  
usage and every 30 days if usage is heavy.  
Figure 17. Thermometer and pressure relief valve.  
2G-6. Adjusting the Pressure Switch  
Caution  
The pressure switch should be adjusted to turn  
the heater off when the pump is off. Setting  
the switch to close at too low of a flow can  
damage the appliance. Adjust the switch to  
turn the heater off, not on.  
Table 7. Mineral Concentration Levels  
Test  
Recommended Level  
Free chlorine  
Bromine  
1.0 to 3.0 ppm  
3.0 to 5.0 ppm  
7.2 to 7.8  
pH  
The pressure switch is preset at the factory for  
activation at 2 psi (14 kPa). Adjust the pressure switch  
only if any part of the filter system piping is 3 feet  
(0.91 m) or more above the top of the heater jacket.  
Do not adjust the pressure switch if the heater is  
installed more than 15 feet (4.57 m) below or 6 feet  
(1.83 m) above the pool surface. Consult your local  
Waterpik Laars representative for recommendations.  
On some installations, the piping from the heater  
to the pool is very short. The back pressure could be  
too low to trigger the pressure switch. If this happens,  
it may be necessary to install a directional fitting or  
elbows where the return line enters the pool. This will  
increase back pressure enough for the heater to operate  
properly.  
Total alkalinity (TA)  
Calcium hardness (CH)  
80 to 120 ppm  
200 to 400 ppm  
Langelier saturation index (LSI) -0.5 to +0.5  
Total dissolved solids (TDS)  
Cyanuric acid  
Less than 2000 ppm  
30 to 150 ppm  
0 ppm  
Copper  
2G-5. Pressure Relief Valve  
A pressure relief valve is not furnished with the  
Laars Lite 2 heater. However, it is recommended that a  
pressure relief valve be installed and may even be  
required by local codes.  
To install a pressure relief valve, remove the 3/4  
inch (19 mm) brass plug located on the top of the inlet/  
outlet header (see Figure 17). Install the pressure relief  
valve in the threaded hole from which the plug was  
removed. The pressure rating of the valve should be at  
or below the lowest working pressure of any compo-  
nent in the filter system. Any pressure relief valve  
installed must comply with provisions of the Standard  
described in ANSI Z21.22 for the United States, or  
CAN1-4.6 in Canada.  
Make sure the pool filter is clean before making  
any pressure switch adjustment: A dirty filter will  
restrict the water flow and the pressure switch cannot  
be adjusted properly. To adjust the pressure switch:  
1. Set the control panel rotary switch (LD) or the  
control panel rocker switch (LG) to the OFF  
position (see Figure 18).  
2. Set the Pool temperature control to the Max  
position.  
3. Turn filter pump on. If a two-speed pump is used,  
make sure it is at high speed.  
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WATERPIK TECHNOLOGIES INC.  
Page 14  
2G-7. Automatic Flow Control Valve  
The automatic flow control valve maintains the  
proper flow through the heater at rates up to approxi-  
mately 125 Gallons Per Minute (GPM) (474 liters per  
minute [LPM]). If the system filter-flow rate is higher  
than approximately 125 GPM (474 LPM), install a  
manual bypass valve (see Figure 20), then perform a  
temperature rise test (see Section 2G-8) and adjust the  
flow using the bypass valve until the proper tempera-  
ture rise is obtained.  
a) Model LD Temperature Control  
2G-8. Temperature Rise  
A temperature rise test confirms proper water  
flow through the heater. The temperature rise is the  
difference between the temperature of the pool or spa  
water before and after heating, as measured in the  
header. Perform the following temperature rise test  
when the installation is complete:  
1. Make sure the pool filter is clean.  
b) Model LG Temperature Control  
2. Set the rotary switch (LD) or rocker switch (LG)  
on the temperature control panel (see Figure 18)  
to OFF.  
Figure 18. Temperature controls.  
3. Turn the filter pump off.  
4. Remove the drain plug located on the inlet/outlet  
header of the heater and replace it with a Pete's  
plug (see Figure 17).  
5. Insert a pocket thermometer (see Figure 17)  
through the Pete's plug into the header.  
6. Turn the filter pump on and wait 3 minutes. The  
heater remains off. This allows water from the  
pool to reach the heater.  
7. Record the temperature indicated by the ther-  
mometer (cold water).  
Figure 19. Pressure switch adjustment.  
8. Turn the heater ON following the lighting in-  
structions found on the inside of the heater.  
NOTE: Heater should not be allowed to fire on  
lowspeed.  
9. Allow the heater to run for about 3 minutes.  
Record the new temperature reading (heated  
water).  
4. Turn rotary switch (LD) or rocker switch (LG) to  
ON. Heater should start.  
5. Pry out the top rubber dust plug on the top of the  
pressure switch.  
10. Subtract the first temperature reading (cold  
water) from the second temperature reading  
(heated water). The difference between the two  
readings is the temperature rise. The temperature  
rise should be within the range shown in Table 6.  
Table 6. Temperature Rise and Minimum Flow Rates  
6. Use a 7/32 inch (5.55 mm) Allen wrench to turn  
the adjustment screw very slowly clockwise until  
the heater goes off (see Figure 19).  
7. Slowly turn the pressure switch adjustment screw  
counterclockwise one-quarter turn. The heater  
should come back on.  
Minimum  
Minimum  
Maximum  
Size  
GPM (LPM)  
°F  
(°C)  
°F  
(°C)  
8. Check the adjustment by turning the filter pump  
OFF. The heater should shut off immediately. If  
it does not, restart the filter pump and repeat  
Steps 6 and 7. Check the adjustment again.  
125  
175  
250  
325  
400  
20  
20  
25  
30  
30  
(76)  
27  
33  
33  
28  
30  
(15)  
(19)  
(19)  
(16)  
(17)  
36  
42  
42  
38  
39  
(20)  
(24)  
(24)  
(21)  
(22)  
(76)  
(95)  
(114)  
(114)  
9. Return the pool temperature control to the desired  
temperature.  
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Model LG & LD Pool and Spa Heater  
Page 15  
Note: When using metal pipe as heat sink, join metal and PVC/CPVC, using metal male and PVC/CPVC female connection.  
Figure 20. Typical installation.  
2G-9. Adjusting the Manual Bypass Valve  
After the manual bypass valve is installed, use  
the following procedures to adjust the bypass valve:  
11. If the temperature rise is below the minimum  
range indicated, two possibilities arise:  
a. The supply gas volume is too low.  
1. Clean pool filter.  
b. The system's water flow exceeds 125 GPM  
(474 LPM), and requires a manual bypass  
valve for proper operation (see Figure 19).  
2. Remove drain plug located on the inlet/outlet  
header of the heater and replace it with a Pete's  
plug.  
12. If the temperature rise is above the maximum,  
there is not enough water flowing through the  
heater. Check for clogging in the water filter or  
restriction in the water pipes.  
3. Insert a pocket thermometer (see Figure 17)  
through the Pete's plug into the header.  
4. Close manual bypass valve.  
5. Turn rotary switch (LD) or the rocker switch  
(LG) on the temperature control to the OFF  
position.  
Caution  
Operation with the temperature rise above  
maximum or below the minimum can damage  
the heater and may void the warranty.  
6. Repeat steps 6 through 10 of the temperature rise  
test (see Section 2G-8).  
7. If the temperature rise is below the minimum  
stated in Table 6, open the manual bypass valve  
until temp rise climbs between the min. and max.  
range for your size heater. If the minimum  
temperature rise stated in Table 6 cannot be  
reached with the manual bypass fully open, then  
the gas supply volume is too low.  
13. If the temperature rise is within the correct range,  
complete the procedure as follows:  
a. Turn heater off.  
b. Wait 3 minutes, turn filter pump off.  
c. Remove thermometer and Pete's plug.  
d. Replace the drain plug.  
8. If the temperature rise is above the maximum,  
there is not enough water flowing through the  
heater. Check for clogging in the water filter or  
restriction in the water pipes.  
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WATERPIK TECHNOLOGIES INC.  
WARNING  
Vent pipes, drafthoods, and heater tops get  
hot! These surfaces can cause serious burns.  
Do not touch these surfaces while the heater  
is in operation. Adding a vent cap reduces the  
temperature on the top.  
Page 16  
9. Once the temperature is within the correct range,  
safety wire the handle of the manual bypass valve  
in place and tag the valve to prevent change in the  
water flow.  
SECTION 3.  
Operating Instructions  
WARNING  
3A. General Information  
For your safety, when starting the heater, keep  
your head and face well away from the lower  
firebox opening to prevent any risk of personal  
injury.  
With any new pool or spa installation, operate the  
filter pump with the heater off long enough to com-  
pletely clean the water. This will remove any installation  
residue from the water. Clean the filter at the end of this  
operation before starting the heater. When raising the  
temperature of a cold pool, remove all time clock  
settings. This lets the filter system and heater operate  
continuously until the water reaches the temperature  
setting on the temperature control. When that happens,  
the heater will automatically shut off, but the filter pump  
will keep running.  
3B. Lighting and Shutdown Procedures  
NOTE: If your LP tank runs out of fuel, turn off  
gas at the heater. After the tank is refilled, the  
heater must be relit following the instructions  
found on the inside of the heater. DO NOT  
attempt repairs on the gas control or heater.  
Tampering is dangerous and voids all warranties.  
Caution  
Do not use this heater if any part has been  
under water. Immediately call a qualified  
service technician to inspect the heater and  
replace any part of the control system and any  
gas control which has been under water.  
3B-1. Model LD (see Page 17).  
3B-2. Model LG (see Page 18).  
Attention  
3C. Setting the Temperature Control  
The temperature control (see Figure 18) is  
calibrated at the factory and covers a range from  
approximately 70°F to 104°F (21°C to 40°C). Use an  
accurate pool thermometer to determine the best water  
temperature for your uses.  
N'utilisez pas cet appareil s'il a été plongé  
dans l'eau, même partiellement. Faites  
inspecter l'appareil par un technicien qualifié  
et remplacez toute partie du système de  
contrôle et toute commande qui ont été  
plongés dans l'eau.  
The Laars Lite 2 model LD has dual temperature  
controls, which allows two different temperature  
settings, selected by the rotary switch in the middle of  
the panel. One control can be set for normal use and  
the other for standby; or one can be set for pool and  
the other for a spa. Placing the rotary switch in the  
middle turns off the heater (see Figure 18). The model  
LG has only a single control and is set similarly to the  
LD above.  
Caution  
Should overheating occur or the gas supply  
fail to shut off, turn off the manual gas control  
valve to the heater.  
Attention  
En cas de surchauffe ou si l'alimentation en  
gaz ne s'arrête pas, fermez manuellement le  
robinet d'arrêt de l'admission de gaz.  
IMPORTANT: The temperature controls cannot  
be calibrated in the field. If the control is faulty, shut  
down the heater and have a qualified service technician  
replace the control. DO NOT use the thermostat switch  
to completely shut down the heater.  
Caution  
Keep all objects off the top of the heater.  
Blocking air flow could damage the heater,  
and may void the warranty.  
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Model LG & LD Pool and Spa Heater  
Page 17  
3B-1. Model LD (Direct Ignition)  
FOR YOUR SAFETY READ BEFORE OPERATING  
WARNING: If you do not follow these instructions exactly, a fire or explosion  
may result, causing property damage, personal injury or loss of life.  
A. This appliance does not have a pilot light. It is  
equipped with an ignition device which  
automatically lights the heater. Do NOT try to  
light the burners by hand.  
• If you cannot reach your gas supplier, call  
the fire department.  
C. Use only your hand to push in or turn the  
gas control knob. Never use tools. If the  
knob will not push in or turn by hand, don't  
try to repair it, call a qualified service  
technician. Force or attempted repair may  
result in a fire or explosion.  
B. BEFORE OPERATING, smell all around the  
appliance area for gas. Be sure to smell next  
to the floor because some gas is heavier than  
air and will settle on the floor.  
WHAT TO DO IF YOU SMELL GAS  
Do not try to light any appliance  
D. Do not use this appliance if any part has  
been under water. Immediately call a  
qualified service technician to inspect the  
appliance and to replace any part of the  
control system and any gas control which  
has been under water.  
Do not touch any electric switch; do not  
use any phone in your building.  
• Immediately call your gas supplier from a  
neighbor's phone. Follow the gas  
supplier's instructions.  
OPERATING INSTRUCTIONS  
1. STOP! Read the safety information above on  
this label.  
9. Replace control access panel  
10. Turn on all electric power to appliance.  
2. Set the thermostat to lowest setting and turn  
appliance switch to "OFF".  
3. Turn off all electric power to the appliance.  
11. Set thermostat to desired setting and turn  
appliance switch from "OFF" to either  
"POOL" or "SPA".  
4. This appliance is equipped with an ignition  
device which automatically lights the heater.  
Do not try to light the burners by hand.  
12. If the appliance will not operate, check that  
the filter pump is on, the filter is clean and  
water is flowing to the pool. Otherwise, follow  
the instructions "To Turn Off Gas To  
Appliance" and call your service technician  
or gas supplier.  
5. Remove the heater door.  
6. Turn gas control knob clockwise  
"OFF".  
to  
7. Wait five (5) minutes to clear out any gas.  
Then smell for gas, including near the floor. If  
you smell gas, STOP! Follow "B" in the safety  
information above on this label. If you don't  
smell gas, go to next step.  
8. Turn gas control knob counterclockwise  
to "ON".  
TO TURN OFF GAS TO APPLIANCE  
1. Set the thermostat to lowest setting and turn  
appliance switch to "OFF".  
3. Turn gas control knob clockwise  
"OFF".  
to  
2. Turn off all electric power to the appliance if  
service is to be performed.  
4. Replace control access panel.  
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WATERPIK TECHNOLOGIES INC.  
Page 18  
3B-2. Model LG (Standing Pilot)  
FOR YOUR SAFETY READ BEFORE OPERATING  
WARNING: If you do not follow these instructions exactly, a  
fire or explosion may result causing property damage, personal  
injury or loss of life.  
A. This appliance has a pilot which must be  
lighted by a push button sparker. When  
lighting the pilot, follow these instructions  
exactly.  
• If you cannot reach your gas supplier, call  
the fire department.  
C. Use only your hand to push in or turn the  
gas control knob. Never use tools. If the  
knob will not push in or turn by hand, don't  
try to repair it. Call a qualified service techni-  
cian. Force or attempted repair may result in  
a fire or explosion.  
B. BEFORE LIGHTING, smell all around the  
appliance area for gas. Be sure to smell next  
to the floor because some gas is heavier  
than air and will settle on the floor.  
WHAT TO DO IF YOU SMELL GAS  
• Do not try to light any appliance.  
D. Do not use this appliance if any part has  
been under water. Immediately call a quali-  
fied service technician to inspect the appli-  
ance and to replace any part of the control  
system and any gas control which has been  
under water.  
• Do not touch any electric switch; do not  
use any phone in your building.  
• Immediately call your gas supplier from a  
neighbor's phone. Follow the gas  
supplier's instructions.  
OPERATING INSTRUCTIONS  
1. STOP! Read the safety information above.  
7. Push the button of the sparker, repeating until  
confirming that pilot lights, by observing  
reflection on burner tray mirror.  
2. Set the thermostat to lowest setting and turn  
appliance ON/OFF switch to "OFF".  
8. Continue to hold the control knob down for  
about one (1) minute after the pilot is lit. If it  
goes out, repeat steps 3 through 8.  
3. Turn gas control knob clockwise  
stops at "OFF" position.  
until it  
4. Wait five (5) minutes to clear out any gas. If  
you then smell gas, STOP! Follow "B" in the  
safety information above. If you don't smell  
• If knob does not pop out when released,  
stop and immediately call your service  
technician or gas supplier.  
PILOT  
gas go to the next step.  
BURNER  
• If the pilot will not stay lit after several tries,  
turn the gas control knob to "OFF" and call  
your service technician or gas supplier.  
5. To find pilot—follow gas  
line from gas valve to pilot  
location.  
9. Turn gas control knob counterclockwise  
to "ON".  
6. Turn knob on gas valve  
counterclockwise  
to  
"PILOT" then push control  
10. After replacing control compartment access  
panel, set thermostat to desired setting and  
turn appliance ON/OFF switch to "ON". Valve  
has built-in delay before coming on.  
knob all the way and hold down.TOVALVE  
11. If the appliance will not operate, check that  
the filter pump is on, that the filter is clean  
and water is flowing to the pool. Otherwise,  
follow the instructions "To Turn Off Gas To  
Appliance" and call your service technician or  
gas supplier.  
TO TURN OFF GAS TO APPLIANCE  
1. Set the thermostat to lowest setting and turn  
appliance ON/OFF switch to "OFF".  
2. Turn gas control knob clockwise  
until it  
stops at "PILOT". Then press down slightly  
on knob while turning clockwise  
"OFF". Do not force.  
to  
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Model LG & LD Pool and Spa Heater  
Page 19  
6. Use compressed air to blow out any standing  
3D. Seasonal Care  
water remaining in the heat exchanger.  
Caution  
7. Grease the threads on the drain plugs and rein-  
stall plugs, but do not tighten.  
Do not operate this heater outdoors at  
temperatures below 20 degrees Fahrenheit  
(°F) (-7 degrees Celsius [°C]).  
8. Disconnect the pressure switch from the siphon  
loop (copper tubing) (see Figure 22).  
3D-1. Spring and Fall Operation  
During periods when the pool is only going to be  
used occasionally, turn the temperature control down  
to the MIN setting. This prevents the pool from water  
from becoming chilled, and minimizes the time re-  
quired to raise the pool water back up to the desired  
temperature.  
In areas subject to only short freeze periods, turn  
off the heater and run the pump continuously for the  
length of the freeze period.  
3D-3. Spring Start-up  
To restart the heater in the Spring, have a profes-  
sional service technician reassemble the heater as  
follows:  
1. Fill the siphon loop with approximately 5cc of  
SAE 50, non-detergent oil. Attach the copper  
tubing to the pressure switch (see Figure 22).  
2. Tighten the drain plugs.  
3. Turn on the filter pump and circulate water  
through the heater for 5 minutes. Check for leaks  
whilecirculating.  
If the heater is not going to be used for a long  
period of time, shut it down completely. Follow the  
instructions found on the inside of the heater, or pages  
17(LD) or 18(LG) of this manual.  
4. Turn on the main gas supply valve to the heater,  
outside the heater jacket.  
3D-2. Winterizing  
5. Turn on the heater following the lighting instruc-  
tions found on the inside of the heater, or pages  
17(LD) or 18(LG) of this manual.  
In areas where freezing temperatures occur in  
winter, and the pool or spa will not be used, have your  
service technician perform the following steps:  
1. Turn off the main gas supply valve to the heater,  
outside the heater jacket.  
2. Remove heater door.  
3. Shut down the heater following the shutdown  
instructions found on the inside of the heater.  
4. Remove the drain plug from the return header  
(see Figure 21), loosen the drain plug from the  
inlet/outlet header, and completely drain the  
heater before the first frost.  
5. After all water has drained from the heater,  
remove the drain plug from the inlet/outlet side.  
Check for mineral buildup in the openings.  
Figure 22. Pressure switch copper tubing.  
Figure 21. Heater drain locations.  
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WATERPIK TECHNOLOGIES INC.  
Page 20  
Lack of awareness of impending hazard  
Failure to perceive heat  
3E. Water Chemistry  
For notes on water chemistry please consult  
sections 2G-4, 2G-4a and Table 7 on page 13 of this  
manual.  
Failure to recognize need to leave spa  
Physical inability to leave spa  
Fetal damage in pregnant women  
3F. Spa/Hot Tub Safety Rules  
WARNING  
Unconsciousness resulting in a danger of drown-  
ing  
The following Safety Rules for Hot Tubs,”  
recommended by the U.S. Consumer Product  
Safety Commission, should be observed when  
using the spa.  
3G. Swimming Pool Energy Saving Tips  
Waterpik Laars offers the following recommen-  
dations to help conserve fuel and minimize the cost of  
operating your pool heater without sacrificing com-  
fort.  
1. Spa or hot tube water temperature should never  
exceed 104°F (40°C). One hundred degrees  
Fahrenheit (100°F [38°C]) is considered safe for  
a healthy adult. Special caution is recommended  
for young children.  
1. The American Red Cross recommends a maxi-  
mum water temperature of 78°F (25°C). Use an  
accurate pool thermometer. A difference of 4F°  
(3C°) , between 78°F and 82°F (25°c and 28°C),  
will use as much as 40% more gas.  
2. The drinking of alcoholic beverages before or  
during spa or hot tub use can cause drowsiness  
which could lead to unconsciousness, and subse-  
quently result in drowning.  
2. Carefully monitor the water temperature of your  
pool in the summertime. You can reduce heater  
usage due to warmer air temperatures.  
3. Pregnant women take note! Soaking in water  
above 102°F (38.5°C) can cause fetal damage  
during the first three months of pregnancy (which  
could result in the birth of a brain-damaged or  
deformed child). If pregnant women are going to  
use a spa or hot tub, they should make sure the  
water temperature is below 100°F (38°C) maxi-  
mum.  
3. Find the proper setting on the pool heater tem-  
perature control and use the TEMP-LOK to  
discourage further adjustments.  
4. Set the filter time clock to start the pump no  
earlier than 6:00 AM during the pool heating  
season. This is the time when nightly heat loss  
balances.  
4. The water temperature should always be checked  
with an accurate thermometer before entering a  
spa or hot tub. Temperature controls may vary by  
as much as 4F° (2C°).  
5. If the pool is only going to be used on weekends,  
reduce the heater temperature control setting by 8  
or 10 degrees during the week. Reset it to the  
78°F (25°C) level a day or so before you plan to  
use the pool.  
5. Persons with a medical history of heart disease,  
diabetes, circulatory or blood pressure problems  
should consult their physician before using a hot  
tub or spa.  
6. During the winter or when on vacation for longer  
than a week, shut down the heater by following  
the shutdown instructions found on the inside of  
the heater.  
6. Persons taking any medication which induces  
drowsiness (e.g., tranquilizers, antihistamines, or  
anticoagulants) should not use spas or hot tubs.  
7. Where possible, shelter the pool from prevailing  
winds with well-trimmed hedges or other land-  
scaping, cabanas, or fencing.  
7. Prolonged immersion in hot water can induce  
hyperthermia.  
8. Always use a pool cover when practical. Besides  
providing a valuable safety feature, a pool cover  
will reduce heat loss, conserve chemicals, and  
reduce the load on filter systems.  
Hyperthermia occurs when the internal body  
temperature reaches a level several degrees above the  
normal body temperature of 98.6°F (37°C). Symptoms  
include dizziness, fainting, drowsiness, lethargy, and  
an increase in the internal body temperature. The  
effects of hyperthermia include:  
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Model LG & LD Pool and Spa Heater  
Page 21  
3. Inspect the electrical controls, specifically the  
following:  
3H. Periodic Inspection  
WARNING  
Improper installation or maintenance can  
cause nausea or asphyxiation from carbon  
monoxide in flue gases which could result in  
severe injury, or death.  
a. High limit controls.  
b. Pressure switch.  
c. Temperature control.  
d. Automatic gas valve.  
4. Inspect the venting system for blockage,  
leakage, and corrosion.  
3H-1. Owner Inspection  
Waterpik Laars designs and constructs the Laars  
Lite 2 heater to provide long performance life when  
installed and operated properly under normal condi-  
tions. The following basic guidelines are suggested for  
yourinspection:  
5. Check for spider webs in the pilot and main  
burner orifices - especially at Spring start-up.  
6. Conduct a normal operating cycle and observe  
that the sequence proceeds as intended.  
1. Keep the top and surrounding area of the heater  
clear of all debris.  
7. Inspect the external surfaces of the heat  
exchanger tubes for black carbon soot buildup  
by placing a mirror between and under the  
burners when the heater is firing. Remove any  
soot that has collected on the tubes, and  
correct the cause.  
2. Keep the heater area clean and free of all com-  
bustible materials, flammable liquids and vapors,  
as well as sanitization chemicals.  
3. Do not use the heater if any part has been under  
water. Immediately call a qualified professional  
technician to inspect the heater and replace any  
part of the control system which has been sub-  
merged.  
NOTE: After installation and first start-up,  
check the heat exchanger for black carbon soot  
buildup after the following periods of operation: 24  
hours, 7 days, 30 days, 90 days, and once every 6  
monthsthereafter.  
N'utilisez pas cet appareil s'il a été plongé dans  
l'eau, même partiellement. Faites inspecter  
l'appareil par un technicien qualifié et remplacez  
toute partie du système de contrôle et toute  
commande qui ont été plongés dans l'eau.  
Proper flames appear:  
a. Blue in color.  
b. 1 to 4 inches (25 to 102mm) high above  
burner surface.  
4. If the heater is equipped with a pressure relief  
valve, check for corrosion in and around the  
valve. With the filter pump on, lift the release  
lever on the top of the valve to make sure that  
water runs freely through it. If corrosion is found,  
replace the pressure relief valve. When replacing  
the valve, be sure that the pump is off. Install the  
valve so that the discharge is directed away from  
any area the may be damaged by water.  
SECTION 4.  
Parts List for Laars Lite 2 Heater  
4A. General Information  
5. Be sure all combustion air and ventilation open-  
ings are not blocked.  
To purchase parts or obtain a comprehensive  
maintenance manual for the Laars Lite 2 heater,  
contact your nearest Waterpik Laars dealer or  
distributor. If they cannot supply you with what you  
need, contact the Customer Service Manager,  
Waterpik Laars, 21 Pimentel Ct, Novato, California,  
94949, Telephone (415) 382-8220 extension 245.  
3H-2. Professional Inspection  
In addition, annual inspections by a qualified  
professional technician are recommended to keep the  
heater operating safely and efficiently through the years.  
The following basic checks should be performed.  
4B. Parts List  
1. Check for loose or broken wires and terminal  
connections.  
The following three pages contain a parts list,  
general exploded view and detailed exploded views to  
aid in parts identification. Please refer to these pages  
when ordering parts for your Laars Lite 2 pool heater.  
2. Verify pressure switch operation by cycling  
the spa pump on and off a few times. The  
heater should go off immediately after the  
pump stops.  
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WATERPIK TECHNOLOGIES INC.  
Page 22  
Key  
Model ORDER  
Key  
No  
Model  
No  
ORDER  
No  
Description  
No  
PART NO  
Description  
PART NO  
PILOT/IGNITER SYSTEM  
Pilot, Main Burner Assembly, NAT  
Pilot, Main Burner Assemby, LPG  
Pilot Burner, NAT  
Pilot Burner, LPG  
Pilot Electrode  
VENT SYSTEM  
1
1
2
2
3
4
5
6
7
8
9
All  
R0099100  
R0099200  
R0096700  
R0096600  
W0040000  
W0036901  
10418820  
10457500  
R0099000  
R0037000  
R0096800  
R0323300  
R0317200  
59  
60  
61  
61  
62  
62  
63  
63  
64  
64  
65  
66  
67  
68  
Top Enclosure  
Top Filler Plate (US Only)  
Rainshield Kit (US Only)  
125-400 R0343401-05  
125-400 R0343701-05  
125-400 R0318301-05  
125-400 R0318311-15  
125-400 R0316401-05  
125-400 R0316406-10  
125-400 10561501-05  
125-400 10561511-15  
125-400 10561401-05  
125-400 10561411-15  
125-400 10861901-05  
125-400 10535301-05  
All  
All  
All  
All  
All  
All  
All  
All  
All  
All  
All  
All  
Rainshield Kit (Canada Only)  
Flue Collector Assembly (US Only)  
Flue Collector Assembly (Canada Only)  
Outdoor Vent Cap (US Only)  
Outdoor Vent Cap (Canada Only)  
Indoor Drafthood (US Only)  
Indoor Drafthood (Canada Only)  
Flue Transition Plate (US Only)  
Adapter Plate  
Pilot Generator  
Ceramic Insulator Assembly  
Burner, Main w/Pilot Bracket  
High Voltage Lead Assembly  
Pilot Tubing  
Piezo Lighter Assembly  
10 Pilot Condensate Shield - LG  
11 Ignitor - LD  
Clip  
All  
All  
10211000  
10726000  
Flue Collector Hold Down Clamp  
MAIN GAS ASSEMBLY  
12 Burner Tray Assy, NAT - LG  
12 Burner Tray Assy, LPG - LG  
12 Burner Tray Assy, NAT - LD  
12 Burner Tray Assy, LPG - LD  
125-400 R0098601-05  
125-400 R0098701-05  
125-400 R0316901-05  
125-400 R0319501-05  
125-400 R0317001-05  
WATER SYSTEM  
69 Inlet/Outlet Header, 2"  
All  
All  
All  
R0056400  
R0016800  
R0058300  
R0054600  
R0057000  
F0046100  
F0011100  
F0003100  
R0050800  
R0055000  
10573500  
S0078000  
S0078200  
F0031700  
S0078100  
R0316300  
S0071100  
P0019701  
P0026800  
P0027000  
R0013100  
69 Inlet/Outlet Header, Bronze, 2"  
70 Return Header (Includes set of 9 gaskets)  
70 ReturnHeader, Bronze (Includes set of 9 gaskets) All  
13  
14  
14  
14  
14  
15  
15  
16  
17  
18  
19  
19  
19  
19  
19  
Burner Tray, Shelf Only  
Gas Valve, NAT - LG  
Gas Valve, LPG - LG  
Gas Valve, NAT - LD  
Gas Valve, LPG - LD  
Gas Orifice, NAT 0 - 3,000 ft alt. (EA.) (Note 1) All  
Gas Orifice, LPG 0 - 5,000 ft alt. (EA.) (Note 2) All  
Anti-Rotation Bracket  
Mounting Bracket Assembly - LG  
Burner, Main  
All  
All  
All  
All  
R0096400  
R0096900  
R0317100  
R0319600  
L0032200  
L0032900  
10835900  
10419200  
L0052300  
L0052200  
L0006300  
L0006400  
L0006500  
L0006600  
71  
72  
73  
74  
Header Bolt Assembly (Set of 8)  
Bolt for Headers, 2 1/2"  
Washer for Headers  
All  
All  
All  
All  
All  
All  
All  
All  
All  
All  
All  
All  
All  
All  
All  
All  
All  
Nut for Headers  
75 Header Gasket Assembly (Set of 18)  
76 Flange & Gasket Assembly (Set of 2 )  
All  
All  
All  
125  
175  
250  
325  
400  
77  
78  
79  
80  
81  
Flange, 2"  
Flange Gasket, 2"  
Flange Sleeve, 2"  
Flange Bolt  
Burner Manifold  
Burner Manifold  
Burner Manifold  
Burner Manifold  
Flange Gasket, 1 1/2 - 2"  
82 Rubber Grommet for Drain Plug  
83 Grommet, Slitted (Not Shown)  
84 Brass Connector Body  
Burner Manifold  
85 Brass Drain Plug 1/4"  
86 Brass Plug, 3/4"  
ELECTRICAL SYSTEM  
20 Temperature Control Assembly - LG  
All  
All  
All  
All  
All  
All  
All  
All  
All  
All  
R0058200  
R0058000  
10457300  
R0099800  
H0105300  
R0011700  
10457800  
10594600  
R0099900  
H0166500  
87 By-Pass Assembly w/o spring (Iron Cap)  
87 By-Pass Assembly with spring (Bronze Cap)  
21  
22  
23  
24  
Wire Harness  
Plate Assembly  
On-Off Switch  
Temperature Control Label  
125-400 10701401-05  
All  
All  
All  
All  
All  
All  
125  
175  
250  
325  
400  
All  
88  
89  
90  
91  
91  
92  
By-Pass Valve Rod  
Brass Nut (For Rod)  
By-Pass Valve Disc  
S0079800  
F0048400  
R0011500  
10452200  
10557400  
F0041600  
S0079900  
S0061400  
S0061300  
S0061200  
S0070100  
R0011400  
25 Temperature Control Assembly - LD  
By-Pass Valve Control Cap (Iron)  
By-Pass Valve Control Cap (Bronze)  
Control Cap Bolts (2 Required)  
26  
27  
28  
29  
Wire Harness Assembly  
Plate Assembly  
Knob, Single Bar  
93 By-Pass Valve Spring, Purple  
93 By-Pass Valve Spring, White  
93 By-Pass Valve Spring, Red  
93 By-Pass Valve Spring, Blue  
93 By-Pass Valve Spring, Black  
94 By-Pass Valve Gasket  
Temperature Control Label  
Key Nos. 30- 37 are for both R582 (LG) & R117 (LD)  
30 Temperature Sensor  
31 Protector Sleeve, Bulb  
32 "O" Ring, Temperature Control Bulb  
33 Thermostat Knob, Black  
34 Stop Plate, "Temp-Lok"  
35 Temperature Control Gasket  
36 Bezel  
37 Stop Plate Screw (Not Shown)  
38 Temperature Sensor Retainer Bracket  
39 Retainer Bracket Screw  
All  
All  
All  
All  
All  
All  
All  
All  
All  
All  
R0011800  
10444900  
E0116400  
R0010700  
10583100  
S0070000  
S0069800  
F0033300  
10447300  
F0009100  
R0097600  
R0013200  
R0011300  
R0015500  
R0057800  
R0023200  
R0022700  
R0023000  
S0098900  
10419300  
10418400  
10418300  
R0012200  
10479900  
R0097800  
R0344600  
R0344500  
R0059800  
R0061100  
10451200  
10480000  
95 Heat Exch. Tube Assy. (Incl. set of 18 gaskets)  
125-400 R0018101-05  
125-400 10697401-05  
All  
All  
125  
96  
97  
98  
99  
Heat Exchanger Baffle (8 Required)  
Baffle Retainer  
Heat Exchanger Support Clip (2 Required)  
Flow Restrictors (2 Required) (Not Shown)  
S0083900  
10457000  
S0000300  
100 Heat Exchanger End Baffles (2 Required)  
125-400 R0332301-05  
40 Pressure Switch & Siphon Loop Assembly (2 PSI) All  
FIREBOXCOMPONENTS  
101 Complete Combustion Chamber Assy.  
41  
41  
41  
42  
Pressure Switch, 2 PSI  
Pressure Switch, 1 PSI  
Pressure Switch, 1-10 PSI  
Siphon Loop Assembly  
All  
All  
All  
All  
All  
All  
All  
All  
All  
All  
All  
All  
All  
All  
All  
All  
All  
All  
All  
All  
125-400 R0316701-05  
JACKETCOMPONENTS  
102 Door with Latch  
103 Jacket Assembly, Less Top Assembly  
104 Gap Closure, Inlet/Outlet  
105 Gap Closure, Return  
125-400 R0343601-05  
125-400 R0343501-05  
43 High-Limit Switch Assembly  
44  
45  
46  
47  
High-Limit Switch, 135° F  
High-Limit Switch, 150° F  
High-Limit Switch Retainer Boot  
High-Limit Switch Wire Harness  
All  
All  
All  
All  
All  
R0344300  
R0344400  
F0035300  
F0032300  
F0056600  
106 Button Plug, 1-3/4"  
107 Button Plug, 7/8"  
48 High-Limit Switch Retainer Clip  
49 High-Limit Switch Cover  
50 Fusible Link Assembly  
108 Button Plug, 2" (With hole for gas line)  
OPTIONALCOMPONENTS  
Non Combustible Base  
Pressure Relief Valve 3/4" NPT, 75 PSI  
Touch Up Spray Paint, Light Beige  
Flame Sense Rod, Retrofit  
51  
Fusible Link Bracket  
125-400 10521701-05  
52 Terminal Block  
53 Ignition Control Assembly - LD  
All  
All  
All  
All  
R0040400  
X0021100  
R0334300  
R0334200  
54  
55  
56  
57  
58  
Ignition Control - LD  
Harness Assembly (Not Shown)  
Transformer (115V/220V-24V) (Not Shown)  
Ignition Control Panel (Not Shown)  
In-Line Fuse Assembly (Not Shown)  
Igniter Condensate Shield, Retrofit - LD  
Notes:  
1. For altitudes 2,000 Ft above sea level, call factory for orifice size.  
2. For altitudes 5,000 Ft above sea level, call factory for orifice size.  
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Model LG & LD Pool and Spa Heater  
Page 23  
60  
59  
64  
67  
63  
61  
62  
66  
CANADA  
UNITED STATES  
65  
UNITED STATES  
CANADA  
UNITED STATES  
105  
85  
HEATEXCHANGER  
SEE NEXT PAGE FOR DETAIL  
82  
104  
TEMPERATURECONTR0L  
SEE NEXT PAGE FOR DETAIL  
108  
82  
85  
51  
102  
50  
106  
52  
9
103  
53  
107  
54  
101  
10  
BURNERTRAY  
(LDSHOWN)  
SEE NEXT PAGE  
FORDETAIL  
11  
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WATERPIK TECHNOLOGIES INC.  
Page 24  
20  
(LG  
SHOWN)  
92  
39  
38  
89  
90  
22  
91  
32  
31  
86  
94  
23  
88  
93  
24  
87  
30  
42  
76  
78,81  
79  
84  
41  
77  
45  
80  
44  
47  
69  
36  
48  
49  
40  
85  
25  
(LD  
SHOWN)  
27  
43  
29  
28  
35  
68  
95  
96  
33  
70  
98  
34  
75  
97  
26  
69  
74  
72  
73  
74  
72  
71  
75  
2
73  
1
6
4
18  
16  
3
5
14  
8
13  
15  
7
12  
(LG  
SHOWN)  
19  
17  
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Model LG & LD Pool and Spa Heater  
Page 25  
NOTES  
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LAARS LITE 2  
LIMITED WARRANTY  
Your Laars Lite 2 pool/spa heater is backed by this double warranty  
to assure your complete satisfaction.  
1. Controls, copper heat exchanger tubes, and combustion chamber panels are warranted  
against defects in materials and workmanship for two (2) years from date of purchase.  
2. All other parts are warranted against defects in materials and workmanship for five (5) years  
from date of purchase.  
The above warranty applies only if the installation  
and operating instructions applicable to the model  
purchased are expressly and completely followed.  
These instructions are furnished with the unit and  
are also available by writing to the Waterpik Laars  
factory. The liability of Waterpik Laars shall not  
exceed the repair or replacement of defective parts  
by factory authorized technicians, and shall not  
include transportation to or from factory, any labor  
costs, and consequential or incidental damages. Ship  
inoperative parts or complete heater with Serial number,  
Model number and purchase date, transportation prepaid,  
directly to address below, attention Customer Service,  
for evaluation and warranty consideration.  
This warranty gives you specific legal rights. You may  
also have other rights which vary from state to state,  
and by province. Some states do not allow the exclusion  
or limitation of incidental or consequential damages, so  
the above limitation or exclusion may not apply to you.  
6000 Condor Dr., Moorpark, CA 93021 USA* (805) 529-2000  
21 Pimentel Court, Novato, CA, 94949 USA (415) 382-8220  
480S. Service Road West, Oakville, Ontario, Canada L6K 2H4 (905) 844-8233  
*
*6000 Condor Drive, Moorpark, CA, USA 93021  
21 Pimentel Court, Novato, CA, USA 94949  
480 S. Service Road West, Oakville, Ontario, Canada L6K 2H4  
415.382.8220 FAX 415.382.8091  
415.382.8220 FAX 415.382.8091  
905.844.8233 FAX 905.844.2635  
Litho in U.S.A. © Waterpik Laars 9906  
Printed on Recycled Paper  
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