Sterling Gas Heater RF 30 User Manual

(S) DSLPRFM-1  
J30-06933 Rev. A  
INSTALLATION INSTRUCTIONS AND PARTS LIST  
TUBULAR GAS FIRED DIRECT SPARK PROPELLER UNIT HEATERS  
– FOR RESIDENTIAL INSTALLATIONS –  
ATTENTION: READ THIS MANUAL AND ALL LABELS ATTACHED TO THE UNIT CAREFULLY BEFORE  
ATTEMPTING TO INSTALL, OPERATE OR SERVICE THESE UNITS! CHECK UNIT DATA PLATE FOR TYPE OF GAS AND  
ELECTRICAL SPECIFICATIONS AND MAKE CERTAIN THAT THESE AGREE WITH THOSE AT THE POINT OF INSTALLATION.  
RECORD THE UNIT MODEL AND SERIAL No.(s) IN THE SPACE PROVIDED. RETAIN FOR FUTURE REFERENCE.  
Model No.  
Serial No.  
FORYOUR SAFETY  
Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or  
any other appliance.  
FORYOUR SAFETY  
WHAT TO DO IFYOU 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 neighbor’s phone. Follow the  
gas supplier’s instructions.  
If you cannot reach your gas supplier,  
call your fire department.  
Improper installation, adjustment, alteration, service, or maintenance can  
cause property damage, injury, or death. Read the installation, operating, and  
maintenance instruction thoroughly before installing or servicing this equipment.  
APPROVED FOR USE IN CALIFORNIA  
Install, operate, and maintain unit in accordance with the manufacturer's  
instructions to avoid exposure to fuel substances, or substances from incomplete combustion,  
which can cause death or serious illness. The state of California has determined that these  
substances may cause cancer, birth defects, or other reproductive harm.  
INSTALLER'S RESPONSIBILITY  
Installer Please Note: This equipment has been test fired and inspected. It has been  
shipped free from defects from our factory. However, shipment and installation  
problems such as loose wires, leaks, or loose fasteners may occur. It is the installer's  
responsibility to inspect and correct any problem that may be found.  
RECEIVING INSTRUCTIONS  
Inspect shipment immediately when  
received to determine if any damage has  
HVAC PRODUCTS  
occurred to the unit during shipment. After  
260 NORTH ELM ST., WESTFIELD, MA 01085  
TEL: (413) 564-5540 FAX: (413) 562-5311  
the unit has been uncrated, check for any  
visible damage to the unit. If any damage  
is found, the consignee should sign the bill  
of lading indicating such damage and  
immediately file claim for damage with the  
transportation company.  
MODELS: RF-30, 45, 60, 75, 90  
Please utilize this toll free number to contact your local  
representative 800-490-2290.  
10/05  
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GENERAL SAFETY INFORMATION  
Make certain that the power source conforms to the  
electrical requirements of the heater.  
Failure to comply with the general  
safety information may result in extensive  
property damage, severe personal injury, or  
death.  
Do not depend upon a thermostat  
or other switch as sole means of disconnecting  
power when installing or servicing heater. Always  
disconnect power at main circuit breaker as  
described above. Failure to do so could result in  
fatal electric shock.  
This product must be installed by  
a licensed plumber or gas fitter when installed  
within the Commonwealth of Massachusetts.  
Installation must be made in accordance with  
local codes, or in absence of local codes, with  
the latest edition of ANSI Standard Z223.1 (N.F.P.A.  
No. 54) National Fuel Gas Code. All of the ANSI  
and NFPA Standards referred to in these installation  
instructions are those that were applicable at the  
time the design of this appliance was certified.The  
ANSI Standards are available from CSA Information  
Services 1-800-463-6727. The NFPA Standards are  
available from the National Fire Protection Association,  
Batterymarch Park, Quincy, MA 02269.  
Special attention must be given to any grounding  
information pertaining to this heater. To prevent the risk  
of electrocution, the heater must be securely and  
adequately grounded. This should be accomplished by  
connecting a ground conductor between the service panel  
and the heater. To ensure a proper ground, the grounding  
means must be tested by a qualified electrician.  
Do not insert fingers or foreign objects into heater or its  
air moving device. Do not block or tamper with the heater  
in any manner while in operation, or just after it has been  
turned off, as some parts maybe hot enough to cause  
injury.  
If installed in Canada, the installation must conform with  
local building codes, or in the absence of local building  
codes, with CGA-B149.1 "Installation Codes for Natural  
Gas Burning Appliances and Equipment" or CGA-B149.2  
"Installation Codes for Propane Gas Burning Appliances  
and Equipment." These unit heaters have been designed  
and certified to comply with CGA 2.6.  
This heater is intended for general heating applications  
ONLY. It must NOT be used in potentially dangerous  
locations such as flammable, explosive, chemical-laden,  
or wet atmospheres.  
Do not attach ductwork to this product or use it as a  
makeup air heater. Such usage voids the warranty and  
will create unsafe operation.  
Do not alter the unit heater in any  
way or damage to the unit and/or severe personal  
injury or death may occur!  
In cases in which property damage may result from  
malfunction of the heater, a back-up system or  
temperature sensitive alarm should be used.  
Disconnect all power and gas  
supplies before installing or servicing the heater.  
If the power disconnect is out of sight, lock it in  
the open position and tag it to prevent unexpected  
application of power. Failure to do so could result  
in fatal electric shock, or severe personal injury.  
Should overheating occur, or the gas supply fail to shut  
off, shut off the manual gas valve to the appliance before  
shutting off the electrical supply.  
Ensure that all power sources conform  
to the requirements of the unit heater, or damage to  
the unit will result!  
The open end of piping systems being  
purged shall not discharge into areas where there  
are sources of ignition or into confined spaces  
UNLESS precautions are taken as follows: (1) by  
ventilation of the space, (2) control of the purging  
rate, (3) elimination of all hazardous conditions. All  
precautions must be taken to perform this operation  
in a safe manner!  
Follow installation instructions CAREFULLY to avoid  
creating unsafe conditions. All wiring should be done  
and checked by a qualified electrician, using copper wire  
only. All gas connections should be made and leak-  
tested by a suitably qualified individual, per instructions  
in this manual. Also follow procedures listed on "Gas  
Equipment Start-Up Sheet" located in this manual.  
Unless otherwise specified, the following conversions  
may be used for calculating SI unit measurements:  
1 foot = 0.305 m  
1 inch = 25.4 mm  
1 gallon = 3.785 L  
1000 BTU/cu. ft. = 37.5 MJ/m3  
1000 BTU per hour = 0.293 kW  
1 inch water column = 0.249 kPa  
Use only the fuel for which the heater is designed (see  
rating plate). Using LP gas in a heater that requires  
natural gas, or vice versa, will create risk of gas leaks,  
carbon monoxide poisoning, and explosion.  
1 pound = 0.453 kg liter/second = CFM x 0.472  
1 psig = 6.894 kPa meters/second = FPM ÷ 196.8  
1 cubic foot = 0.028m3  
Do not attempt to convert the  
heater for use with a fuel other than the one  
intended. Such conversion is dangerous, as it  
will create the risks previously listed.  
3
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Table 1 - Performance and Dimensional Data - Tubular 30 thru 90 Propeller Unit Heater  
Unit Size  
30  
45  
60  
75  
90  
PERFORMANCE DATA†  
Input - BTU/Hr.  
(kW)  
Output - BTU/Hr.  
(kW)  
Thermal Efficiency (%)  
Free Air Delivery - CFM  
(cu. m/s)  
Air Temperature Rise - Deg. F  
(Deg. C)  
30,000  
(8.8)  
24,300  
(7.1)  
81  
500  
(0.236)  
45  
45,000  
(13.2)  
36,450  
(10.7)  
81  
750  
(0.355)  
45  
60,000  
(17.6)  
48,600  
(14.2)  
81  
1,000  
(0.473)  
45  
75,000  
(22.0)  
60,750  
(17.8)  
81  
1,250  
(0.591)  
45  
90,000  
(26.4)  
72,900  
(21.4)  
81  
1,500  
(0.710)  
45  
(25)  
(25)  
(25)  
(25)  
(25)  
Full Load Amps at 120V  
MOTOR DATA: Motor HP  
Motor (kW)  
3.0  
3.0  
3.7  
3.7  
4.8  
1/20  
(0.04)  
SP  
1/20  
(0.04)  
SP  
1/20  
(0.04)  
SP  
1/20  
(0.04)  
SP  
1/20  
(0.04)  
SP  
Motor Type  
R.P.M.  
Motor Amps @ 115V  
1650  
1.9  
1650  
1.9  
1050  
2.6  
1050  
2.6  
1050  
2.6  
DIMENSIONAL DATA - inches (mm)  
“A” Jacket Height  
12  
(305)  
13  
12  
(305)  
13  
17-3/4  
(451)  
18-3/4  
(476)  
26-3/4  
(679)  
10-1/2  
(267)  
16  
(406)  
16-1/4  
(413)  
16  
17-3/4  
(451)  
18-3/4  
(476)  
26-3/4  
(679)  
10-1/2  
(267)  
16  
(406)  
16-1/4  
(413)  
16  
17-3/4  
(451)  
18-3/4  
(476)  
26-3/4  
(679)  
10-1/2  
(267)  
16  
(406)  
16-1/4  
(413)  
16  
“B” Overall Height  
(330)  
25-1/2  
(648)  
7-1/4  
(184)  
10-1/4  
(260)  
10-1/2  
(267)  
10  
(330)  
25-1/2  
(648)  
7-1/4  
(184)  
10-1/4  
(260)  
10-1/2  
(267)  
10  
“C” Overall Depth  
“Center Line” Height of Flue*  
“Center Line” Electric Connection  
“F” Discharge Opening Height  
“G” Fan Diameter-in  
Unit Weight - lbs.  
(kgs)  
62  
(28)  
68  
(31)  
87  
(39)  
93  
(42)  
95  
(43)  
Shipping Weight - lbs.  
(kgs)  
72  
(33)  
78  
(35)  
102  
(46)  
108  
(49)  
110  
(50)  
* For all installations, the flue collar is included with the unit and should be field installed per the instructions included with the unit.  
Ratings shown are for unit installations at elevations between 0 and 2,000 ft (0 to 610m). For unit installations in U.S.A. above 2,000 ft. (610m), the unit input must be derated 4% for each 1,000 ft. (305m) above sea  
level; refer to local codes, or in absence of local codes, refer to the latest edition of the National Fuel Gas Code, ANSI Standard Z223.1 (N.F.P.A. No. 54), (also refer to Table 6).  
For installations in Canada, any reference to deration at altitudes in excess of 2,000 ft. (610m) are to be ignored. At altitudes of 2,000 ft. to 4,500 ft. (610 to 1372m), the unit must be derated to 90% of the normal  
altitude rating, and be so marked in accordance with the ETL certification.  
DIMENSIONS .XXX STANDARD UNITS  
DIMENSIONS IN PARENTHESIS (XXX) MILLIMETERS  
Figure 2 - Dimensional Drawing – Tubular 30 thru 90 Propeller Unit Heater  
4
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INSTALLATION  
Do not install unit heaters in  
AIR FOR COMBUSTION: The unit heater shall be  
installed in a location in which the facilities for ventilation  
permit satisfactory combustion of gas, proper venting,  
and the maintenance of ambient air at safe limits under  
normal conditions of use. The unit heater shall be located  
in such a manner as not to interfere with proper  
circulation of air within the confined space. When  
buildings are so tight that normal infiltration does not  
meet air requirements, outside air shall be introduced  
per Sections 1.3.4.2 and 1.3.4.3 of ANSI Z223.1 for  
combustion requirements. A permanent opening or  
openings having a total free area of not less than one  
square inch per 5,000 BTU/Hr (1.5 kW) of total input  
corrosive or flammable atmospheres! Premature  
failure of, or severe damage to the unit will  
result!  
Avoid locations where extreme  
drafts can affect burner operation. Unit heaters  
must not be installed in locations where air for  
combustion would contain chlorinated,  
halogenated or acidic vapors. If located in such  
an environment, premature failure of the unit  
will occur!  
Since the unit is equipped with an automatic gas ignition rating of all appliances within the space shall be  
system, the unit heater must be installed such that the provided.  
gas ignition control system is not directly exposed to  
water spray, rain or dripping water.  
NOTICE: Unit Heater sizing should be based on heat  
loss calculations where the unit heater output equals  
NOTICE: Location of unit heaters is related directly or exceeds heat loss.  
to the selection of sizes. Basic rules are as follows:  
CLEARANCES: Each Gas Unit Heater shall be located  
MOUNTING HEIGHT: If the unit heater is installed in a with respect to building construction and other equipment  
garage, it must be installed with a minimum clearance so as to permit access to the Unit Heater. Clearance  
above the floor of 18 inches (457mm).  
between vertical walls and the vertical sides of the Unit  
Heater shall be no less than 1 inch (25.4mm). However,  
AIR DISTRIBUTION: Direct air towards areas of to ensure access to the control box and fan, a minimum  
maximum heat loss. When multiple heaters are involved, of 18" (457mm) is required for the fan, and control box  
circulation of air around the perimeter is recommended side. A minimum clearance of 1 inch (25.4mm) must be  
where heated air flows along exposed walls. Satisfactory maintained between the top of the Unit Heater and the  
results can also be obtained where multiple heaters are ceiling. The bottom of the Unit Heater must be no less  
located toward the center of the area with heated air than 1 inch (25.4mm) from any combustible. The  
directed toward the outside walls. Be careful to avoid distance between the flue collector and any combustible  
all obstacles and obstructions which could impede the must be no less than 1 inch (25.4mm). Also see AIR  
warm air distribution patterns.  
FOR COMBUSTION and VENTING sections.  
Unit heaters should not be installed to maintain low NOTICE: Increasing the clearance distances may  
temperatures and/or freeze protection of buildings. be necessary if there is a possibility of distortion or  
A minimum of 50°F (10°C) thermostat setting must discoloration of adjacent materials.  
be maintained. If unit heaters are operated to maintain  
lower than 50°F (10°C), hot flue gases are cooled inside MOUNTING: The Unit Heater may be mounted with the  
the heat exchanger to a point where water vapor (a flue vent outlet, gas and electrical connections to the right  
gas by-product) condenses onto the heat exchanger or left of the air moving fan. The Unit Heater is shipped  
walls. The result is a mildly corrosive acid that with the connections to the right of the fan when looking  
prematurely corrodes the aluminized heat exchanger in the direction of the air flow. If connections to the right  
and can actually drip water down from the unit heater are required, remove hanger brackets from face of unit  
onto floor surface. Additional unit heaters should be and attach as pictured in Figure 3. If connections to the  
installed if a minimum 50°F (10°C) thermostat setting left are required, invert the heater (180°), mount the  
cannot be maintained.  
hanging brackets as above, and remove, invert, and  
replace the control access panel and the air discharge  
louvers.  
5
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INSTALLATION (continued)  
The Unit Heater may be mounted by Figure 3 - Hanger Bracket Installation Instructions  
fastening the hanging brackets directly  
to ceiling joists or by suspending from  
four rods. See Figures 3, 4 and 5.  
Make certain that  
the lifting methods used to lift the  
heater and the method of suspen-  
sion used in the field installation  
of the heater are capable of  
uniformly supporting the weight  
of the heater at all times. Failure  
to heed this warning may result in  
property damage or personal  
injury!  
Make sure that the  
structure to which the unit heater  
is to be mounted is capable of  
safely supporting its weight.  
Under no circumstances must the  
gas lines, the venting system or  
the electrical conduit be used to  
support the heater; or should any  
other objects (i.e. ladder, person)  
lean against the heater gas lines,  
venting system or the electrical  
conduit for support. Failure to  
heed these warnings may result  
in property damage, personal  
injury, or death.  
Figure 4 - Heater Mounting (Steel Construction)  
Unit Heaters must be  
hung level from side to side and from  
front to back, see Figures 3, 4 and 5.  
Failure to do so will result in poor  
performance and/or premature failure  
of the unit.  
Ensure that all  
hardware used in the suspension  
of each unit heater is more than  
adequate for the job. Failure to do  
so may result in extensive prop-  
erty damage, severe personal  
injury, or death!  
Figure 5 - Heater Mounting (Wood Construction)  
Refer to Figures 3, 4 and 5 for  
suspension of units.  
6
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GAS PIPING  
To avoid damage or possible personal injury, do not connect gas piping to this unit  
until a supply line pressure/leak test has been completed. Connecting the unit before completing the  
pressure/leak test may damage the unit gas valve and result in a fire hazard.  
Do not rely on a shut-off valve to isolate the unit while conducting gas pressure/leak  
tests. These valves may not be completely shut off, exposing the gas valve to excessive pressure and  
damage.  
PIPE SIZING  
NOTICE: If more than one unit heater is to be served  
To provide adequate gas pressure to the gas unit heater, by the same piping arrangement, the total cu. ft./hr.  
size the gas piping as follows:  
input and length of pipe must be considered.  
1. Find the cu. ft./hr. by using the following formula:  
NOTICE: If the gas unit heater is to be fired with LP  
gas, consult your local LP gas dealer for pipe size  
information.  
Input  
Cu. ft./hr. =  
BTU  
2. Refer to Table 2. Match “Length of Pipe in Feet”  
with appropriate “Gas Input - Cu. Ft./Hr.” figure.  
This figure can then be matched to the pipe size at  
the top of the column.  
NOTICE: HEATER INSTALLATION FOR USE WITH  
PROPANE (BOTTLED) GAS MUST BE MADE BY A  
QUALIFIED L.P. GAS DEALER OR INSTALLER. HE  
WILL ENSURE THAT PROPER JOINT COMPOUNDS  
ARE USED FOR MAKING PIPE CONNECTIONS;  
THAT AIR IS PURGED FROM LINES; THAT A  
THOROUGH TEST IS MADE FOR LEAKS BEFORE  
OPERATING THE HEATER; AND THAT IT IS  
PROPERLY CONNECTED TO THE PROPANE GAS  
SUPPLY SYSTEM.  
Example:  
It is determined that a 67 foot (20.4m) run of gas  
pipe is required to connect a 75 MBTU gas unit  
heater to a 1,000 BTU/cu ft. (0.29kW) natural gas  
supply.  
75,000 BTU/Hr  
= 75 Cu. ft./hr.  
1,000 BTU/cu. ft.  
Using Table 2, a 3/4 inch pipe is needed.  
Before any connection is made to the existing line  
supplying other gas appliances, contact the local gas  
company to make sure that the existing line is of  
adequate size to handle the combined load.  
NOTE: See General Safety Information section for  
English/Metric unit conversion factors.  
Table 2 - Gas Pipe Size  
Maximum Capacity of Pipe in Cubic Feet of Gas per Hour (Cubic Meters per Hour) for Gas Pressures of 0.5 psig (3.5 kPa) or Less,  
and a Pressure Drop of 0.5 Inch Water Column (124.4 Pa)  
(Based on a 0.60 Specific Gravity Gas)  
Nominal  
Iron  
Internal  
Dia.  
Length of Pipe, Feet (meters)  
Pipe Size  
in.  
10  
20  
30  
(9.1)  
97  
40  
(12.2) (15.2) (18.3) (21.3) (24.4) (27.4) (30.5) (38.1) (45.7) (53.3) (61.0)  
82 73 66 61 57 53 50 44 40 37 35  
50  
60  
70  
80  
90  
100  
125  
150  
175  
200  
in.  
(3.0)  
175  
(6.1)  
120  
1/2  
0.622  
(4.96) (3.40) (2.75) (2.32) (2.07) (1.87) (1.73) (1.61) (1.50) (1.42) (1.25) (1.13) (1.05) (0.99)  
360 250 200 170 151 138 125 118 110 103 93 84 77 72  
(10.2) (7.08) (5.66) (4.81) (4.28) (3.91) (3.54) (3.34) (3.11) (2.92) (2.63) (2.38) (2.18) (2.04)  
680 465 375 320 285 260 240 220 205 195 175 160 145 135  
(19.3) (13.2) (10.6) (9.06) (8.07) (7.36) (6.80) (6.23) (5.80) (5.52) (4.96) (4.53) (4.11) (3.82)  
1400 950 770 660 580 530 490 460 430 400 360 325 300 280  
(39.6) (26.9) (21.8) (18.7) (16.4) (15.0) (13.9) (13.0) (12.2) (11.3) (10.2) (9.20) (8.50) (7.93)  
2100 1460 1180 990 900 810 750 690 650 620 550 500 460 430  
(59.5) (41.3) (33.4) (28.0) (25.5) (22.9) (21.2) (19.5) (18.4) (17.6) (15.6) (14.2) (13.0) (12.2)  
3950 2750 2200 1900 1680 1520 1400 1300 1220 1150 1020 950 850 800  
(112) (77.9) (62.3) (53.8) (47.6) (43.0) (39.6) (36.8) (34.5) (32.6) (28.9) (26.9) (24.1) (22.7)  
3/4  
1
0.824  
1.049  
1.380  
1.610  
2.067  
2.469  
1 1/4  
1 1/2  
2
2 1/2  
3
6300  
(178)  
4350  
3520  
3000  
2650  
2400  
2250  
2050  
1950  
1850  
1650  
1500  
1370  
1280  
(123) (99.7) (85.0) (75.0) (68.0) (63.7) (58.0) (55.2) (52.4) (46.7) (42.5) (38.8) (36.2)  
3.068 11000 7700  
(311) (218)  
4.026 23000 15800 12800 10900 9700  
(651) (447) (362) (309) (275)  
6250  
(177)  
5300  
(150)  
4750  
(135)  
4300  
(122)  
8800  
(249)  
3900  
(110)  
8100  
(229)  
3700  
(105) (97.7) (92.0) (83.5) (75.0) (69.4) (64.6)  
3450  
3250  
2950  
2650  
2450  
2280  
4
7500  
(212)  
7200  
(204)  
6700  
(190)  
6000  
(170)  
5500  
(156)  
5000  
(142)  
4600  
(130)  
1. Determine the required Cu. Ft./Hr. by dividing the input by 1000. For SI/Metric measurements: Convert BTU/Hr. to kilowatts. Multiply the  
units inputs (kW) by 0.0965 to determine Cu. Meters./Hr. 2. FOR NATURAL GAS: Select pipe size directly from the table. 3. FOR PROPANE  
GAS: Multiply the Cu. Ft./Hr. value by 0.633; then, use the table. 4. Refer to the metric conversion factors listed in the General Safety section  
for SI Unit measurement conversions.  
7
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PIPE INSTALLATION  
1. Install the gas piping in accordance with applicable  
local codes.  
Do not over tighten the inlet gas  
piping into the valve. This may cause stresses that  
2. Check gas supply pressure. Each unit heater must will crack the valve!  
be connected to a gas supply capable of supplying  
its full rated capacity as specified in Table 3. A field NOTICE: Use pipe joint sealant resistant to the action  
LP tank regulator must be used to limit the supply of liquefied petroleum gases regardless of gas  
pressure to a maximum of 14 in. W.C. (3.5 kPa). All conducted.  
piping should be sized in accordance with the  
latest edition of ANSI Standard Z223.1 National Fuel  
Gas Code; in Canada, according to CGA-B149.  
See Tables 1 & 2 for correct gas piping size, and  
also refer to Tables 3, 5 and 6. If gas pressure is  
excessive on natural gas applications, install a  
Check all pipe joints for leakage  
using a soap solution or other approved method.  
Never use an open flame or severe personal  
injury or death may occur!  
pressure regulating valve in the line upstream from Figure 6 - Pipe Installation, Standard Controls  
the main shutoff valve.  
3. Adequately support the piping to prevent strain on  
the gas manifold and controls.  
4. To prevent the mixing of moisture with gas, run the  
take-off piping from the top, or side, of the main.  
5. Standard Unit Heaters are supplied with a  
combination valve which includes:  
a. Manual "A" valve  
b. Manual "B" valve  
c. Solenoid valve  
d. Pressure regulator  
Pipe directly into the combination valve (see Figure  
6).  
6. Gas valve has a pressure test post requiring a  
3/32" hex head wrench to read gas supply and  
manifold pressures. Open 1/4 turn counterclockwise  
to read, turn clockwise to close and reseat. A 5/16"  
ID hose fits the pressure post.  
7. Provide a drip leg in the gas piping near the gas  
unit heater. A ground joint union and a manual gas  
shutoff valve should be installed ahead of the unit  
heater controls to permit servicing. The manual  
Never use an open flame to  
detect gas leaks. Explosive conditions may exist  
which may result in personal injury or death!  
shutoff valve must be located external to the jacket. The appliance and its individual shutoff valve must be  
(See Figure 6) disconnected from the gas supply piping system during  
8. Make certain that all connections have been any pressure testing of that system in excess of 1/2  
adequately doped and tightened.  
psig (3.5 kPa).  
Table 3 - Gas Piping Requirements  
SINGLE STAGE GAS PIPING REQUIREMENTS*  
The appliance must be isolated from the gas supply  
piping system by closing its individual manual shutoff  
valve during any pressure testing of the gas supply  
piping system at test pressures equal to or less than  
1/2 psig (3.5 kPa).  
GasType  
Natural Gas  
Propane (LP) Gas  
Manifold  
Pressure  
3.5 in. W.C.  
(0.9 kPa)  
10.0 in. W.C.  
(2.5 kPa)  
14.0 in. W.C. Max.  
(3.5 kPa)  
14.0 in. W.C. Max.  
(3.5 kPa)  
Supply Inlet  
Pressure  
5.0 in. W.C. Min.  
(1.2 kPa)  
11.0 in W.C. Min.  
(2.7 kPa)  
*For single stage application only at normal altitudes.  
8
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ELECTRICAL CONNECTIONS  
THERMOSTAT WIRING AND LOCATION:  
NOTICE: The thermostat must be mounted on a  
vertical, vibration-free surface, free from air currents,  
and in accordance with the furnished instructions.  
HAZARDOUS VOLTAGE!  
DISCONNECT ALL ELECTRIC  
POWER INCLUDING REMOTE  
DISCONNECTS BEFORE  
SERVICING. Failure to  
disconnect power before  
servicing can cause severe  
personal injury or death.  
Mount the thermostat approximately 5 feet (1.5m) above  
the floor, in an area where it will be exposed to a free  
circulation of average temperature air. Always refer to  
the thermostat instructions, as well as our unit wiring  
diagram, and wire accordingly. Avoid mounting the  
thermostat in the following locations:  
1. Cold Areas- Outside walls or areas where drafts  
may affect the operation of the control.  
2. Hot Areas- Areas where the sun's rays, radiation, or  
warm air currents may affect the operation of the  
control.  
Standard units are shipped for use on 115 volt, 60 hertz,  
single phase electric power. The motor name-plate and  
electrical rating of the transformer should be checked  
before energizing the unit heater electrical system. All  
external wiring must conform to the latest edition of  
ANSI/NFPA No. 70, National Electrical Code, and  
applicable local codes; in Canada, to the Canadian  
Electrical Code, Part 1, CSA Standard C22.1.  
3. Dead Areas- Areas where the air cannot circulate  
freely, such as behind doors or in corners.  
THERMOSTAT HEAT ANTICIPATOR ADJUSTMENTS:  
The initial heat anticipator setpoint should equal the  
thermostat's current amperage draw when the unit is  
firing. This setpoint should be measured for the best  
results. Use the recommended ranges for a guide. If  
further information is needed, consult your thermostat  
manufacturer's instructions.  
Do not use any tools (i.e. screwdriver,  
pliers, etc.) across terminals to check for power.  
Use a voltmeter.  
It is recommended that the electrical power supply to  
each unit heater be provided by a separate, fused, and  
permanently live electrical circuit. A disconnect switch of  
suitable electrical rating should be located as close to  
the gas valve and controls as possible. Each unit heater  
must be electrically grounded in accordance with the  
latest edition of the National Electrical Code, ANSI/NFPA  
No. 70, or CSA Standard C22.1. Refer to Figures 7, 8  
and 9.  
Recommended heat anticipator setting:  
Unit Size:  
30 thru 200  
250 thru 400  
For Tubular Units:  
0.35 Amps  
0.65 Amps  
Figure 7 - Low-voltage Thermostat Wiring  
Single Stage  
NOTICE: The start-up fan delay should not exceed  
30 seconds from a cold start.  
IMPORTANT: For all wiring connections, refer to the  
wiring diagram shipped with your unit (either affixed  
to the side jacket or enclosed in the installation  
instructions envelope). Should any original wire  
supplied with the heater have to be replaced, it must  
be replaced with wiring material having a temperature  
rating of at least 105° C.  
Figure 8 - T834H-1009 or T834H-1017  
Thermostat Wiring  
Honeywell  
T834H-1009  
or  
Warning:RemoveJumper  
between G and R  
insidecontrol panel  
T834H-1017  
Thermostat  
W
R
G
R
G
W1 W2  
D6922  
9
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ELECTRICAL CONNECTIONS (continued)  
Figure 9 - Tubular Propeller Units Equipped with a Rollout Switch  
Tubular 30 thru 90 Unit Sizes with Natural and Propane (LP) Gas  
NOTICE: See Figures 7, 8 and 9 for  
connecting the thermostat to the unit  
heater. If using a standard low voltage  
thermostat with a sub-base switch for  
fan control, remove the jumper between  
G and R. Connect the G terminal of the  
thermostat to the G terminal of the unit  
heater.  
10  
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VENTING*  
All unit heaters must be vented! All Venting installations shall be in accordance with the latest edition of Part 7,  
Venting of Equipment of the National Fuel Gas Code, ANSI Z223.1, or applicable provisions of local building  
codes. Refer to notes* below for Canadian installations. Refer to Figures 12-19.  
CARBON MONOXIDE! Your venting system must not be blocked by any snow, snow  
drifts, or any foreign matter. Inspect your venting system to ensure adequate ventilation exists at all  
times! Failure to heed these warnings could result in Carbon Monoxide Poisoning (symptoms include  
grogginess, lethargy, inappropriate tiredness, or flu-like symptoms).  
When an existing heater is removed or replaced in 4. Follow the lighting instructions. Place the appliance  
venting system, the venting system may not be properly  
sized to vent the attached appliances. An improperly  
being inspected in operation. Adjust thermostat so  
that the appliance will operate continuously.  
sized vent system can cause formulation of condensate 5. After it has been determined that each appliance  
or leakage or spillage of flue gases.  
connected to the venting system properly vents  
when tested as outline above, return doors,  
windows, exhaust fans, fireplace dampers, and any  
other gas-burning appliance to their previous  
condition of use.  
The following steps shall be followed with each appliance  
connected to the venting system placed in operation,  
while any other appliances connected to the venting  
system are not in operation:  
1. Seal any unused openings in the venting system;  
2. Inspect the venting system for proper size and  
horizontal pitch, as required in the National Fuel  
Gas Code, ANSI Z223.1 and these instructions.  
Determine that there is no blockage or restriction,  
leakage, corrosion and other deficiencies, which  
could cause an unsafe condition.  
6. If improper venting is observed during any of the  
above tests, the venting system must be corrected  
immediately so that the system conforms with the  
National Fuel Gas Code, ANSI Z223.1. When  
resizing any portion of the venting system, the  
venting system should be resized to approach the  
minimum size as determined using the appropriate  
tables in Appendix G of the National Fuel Gas Code,  
ANSI Z223.1.  
3. In so far as practical, close all building doors and  
windows and all doors between the space in which  
the appliance(s) connected to the venting system The unit heater shall be connected to a factory built  
are located and other spaces of the building. Turn chimney or vent complying with a recognized standard,  
on clothes dryers and any exhaust fans, such as or a masonry or concrete chimney lined with a lining  
range hoods and bathroom exhausts, so they shall material acceptable to the authority having jurisdiction.  
operate at maximum speed. Do not operate a Venting into an unlined masonry chimney is  
summer exhaust fan. Close fireplace damper.  
prohibited.  
ADDITIONAL REQUIREMENTS FOR CANADIAN INSTALLATIONS  
*The following instructions apply to Canadian installations in addition to installation and operating instructions.  
1. Installation must conform with local building codes, or in the absence of local codes, with current  
CGA-B149.1, Installation Codes for Natural Gas Burning Appliances and Equipment, or CGA-B149.2, Installation  
Codes for Propane Gas Burning Appliances and Equipment.  
2. Any reference to U.S. standards or codes in these instructions are to be ignored and the applicable Canadian  
standards or codes applied.  
11  
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VENTING  
ANSI now organizes vented  
Category I  
Category III  
appliances into four categories.  
Includes non-condensing  
appliances with negative vent  
pressure, like the traditional  
atmospheric unit heater.  
Appliances are non-condensing  
and operate with a positive vent  
pressure.  
Venting Categories  
Non  
Category IV  
Covers condensing appliances  
with positive vent pressure.  
Condensing  
Condensing  
Category II  
Groups condensing appliances  
with negative vent pressure.  
Negative  
Vent  
I
II  
Pressure  
Positive  
Vent  
NOTICE: Category II and IV do  
not apply to equipment specified  
within this manual.  
III  
IV  
Pressure  
VERTICALLY VENTED UNIT HEATERS  
(CATEGORY I)  
Observe the following precautions when venting the unit: 4. Use as few elbows as possible.  
The unit heater shall be connected to a factory built 5. Tape flue pipe joints with high temp, RTV or foil  
chimney or vent complying with a recognized standard,  
face tape.  
or a masonry or concrete chimney lined with a lining 6. Avoid running vent pipe through unheated spaces.  
material acceptable to the authority having jurisdiction. 7. When this cannot be avoided, insulate the pipe to  
Venting into an unlined masonry chimney is  
prohibited.  
1. Use flue pipe of the same size as the flue  
connections on the gas unit heater, 4 inch (102mm).  
All heaters must be vented with UL Listed Type B  
vent, or single wall pipe.  
2. Provide as long a vertical run of flue pipe at the gas  
unit heater as possible. A minimum of 5 feet (1.5m)  
of vertical flue is required. The top of the vent pipe  
prevent condensation of moisture on the walls of  
the pipe. Insulate vent pipe runs longer than 10 feet  
(3m). Insulation should be a minimum of 1/2 inch  
(12.7mm) thick foil faced fiberglass, 1-1/2# density  
insulation.  
8. Do not damper the flue piping. Failure to open such  
a damper prior to operating the gas unit heater will  
result in the spillage of flue gas into the occupied  
space.  
should extend at least 2 feet (0.61m) above the 9. Avoid installing units in areas under negative  
highest point on the roof. Install a weather cap over  
the vent opening.  
3. Slope horizontal runs upward from the gas unit  
heater at least 1/4-inch per foot (21mm/m) minimum.  
pressure due to large exhaust fans or air  
conditioning. When required, a flue vent fan should  
be installed in accordance with the instructions  
included with the fan.  
Horizontal runs should not exceed 33% of the 10. Vent connectors serving Category I and Category  
vertical height of the vent pipe, or chimney, above  
the flue pipe connection, up to a maximum length  
of 10 feet (3m). Horizontal portions of the venting  
II heaters shall not be connected into any portion of  
mechanical draft systems operating under positive  
pressure.  
system shall be supported at maximum intervals of 11. Also refer to Figures 17 and 19 for additional  
4 feet (1.22m). (See Figure 12) requirements.  
Figure 12  
12  
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HORIZONTALLY VENTED UNIT HEATERS  
(CATEGORY I - U.S. RESIDENTIAL ONLY)  
All venting of residential tubular unit heaters must Maintain 1 inch (25.4mm) between the vent pipe and  
comply with CSA International Requirement 10.96 U.S. combustible materials.  
for Unit Heaters for Residential Use (2nd Edition).  
The vent terminal must be installed with a minimum  
Category I horizontal venting arrangements are horizontal clearance of 4 feet (1.2m) from electric  
designed to be used with either single wall vent pipe or meters, gas meters, regulators, and relief equipment.  
double wall (Type B) vent pipe. These arrangements  
must terminate external to the building using either The horizontal portion of the vent pipe must not exceed  
single wall or double wall (Type B) vent. See Table 4 8 feet (2.44m) for the 30 unit size or 10 feet (3.05m) for  
and Figures 13 and 14 for special installation the 45 to 90 unit sizes. The minimum length for the  
requirements regarding these venting conditions.  
horizontal portion of the vent pipe is 4 feet (1.22m). The  
vent system must be constructed as shown in Table 4  
An Amerivent Americap, Fields Starkap, or Metalbestos and Figure 13. The vent pipe and vertical extension  
vent cap must be supplied by the customer for each must be supported as shown in Figure 14.  
power vented unit.  
Seal all vent pipe joints and seams to prevent leakage.  
Vent Systems  
Use General Electric RTV-108, Dow-Corning RTV-732,  
Termination Clearance Requirements  
or equivalent silicone sealant with a temperature rating  
MinimumClearancesfor  
Termination Locations  
Structure  
of 500°F, or 3M #425 aluminum foil tape (or equivalent).  
The vent system must be installed to prevent collection  
of condensate. Pitch horizontal pipes downward 1/4 inch  
per foot (21mm per meter) toward the outlet for  
condensate drainage. Install a tee with a condensate  
drain at the low point of the pipe (See Figure 13). As an  
alternate, a 3/8 inch diameter hole may be drilled at the  
low point of the pipe for condensate drainage.  
4 feet below  
Door, window or any gravity vent inlet  
4 feet horizontally  
1 foot above  
3 feet above  
6 feet  
Forced air inlet within 10 ft.  
Adjoining building or parapet  
Adjacent public walkways  
7 feet above grade  
The venting system for these appliances shall terminate Horizontal portions of the venting systems shall be  
at least 4 feet (1.2m) below, 4 feet (1.2m) horizontal supported at maximum intervals of 4 feet (1.2m) to  
from, or 1 foot (0.3m) above any door, window, or gravity prevent sagging.  
vent air inlet into the building.  
Insulate single wall vent pipe exposed to cold air or  
The vent terminal must be at least 12 inches (305mm) running through unheated areas.  
from the exterior of the wall that it passes through to  
prevent degradation of the building material by flue Local codes may supersede any of the above  
gases.  
provisions.  
The vent terminal must be at least 3 feet (1m) above Each unit must have an individual vent pipe and  
grade, or in snow areas, at least 3 feet (1m) above the vent terminal! Each unit MUST NOT be connected to  
snow line to prevent blockage by snow.  
other vent systems or to a chimney.  
Through the wall vent for these appliances shall NOT  
terminate over public walkways, or over an area where  
the condensate or vapor could create a nuisance or  
hazard or could be detrimental to the operation of  
regulators, relief valves, or other equipment.  
13  
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Table 4 - Category I Horizontal Venting Requirements  
Vent  
Diameter  
(in)  
Maximum Number  
Maximum Horizontal  
Vent Length  
(Ft.)  
Minimum  
Vertical Rise  
(In.)  
Extension  
Distance  
from Wall  
Unit  
Size  
Elbows  
*
30  
4
4
4
4
1
1
2
2
4
8
4
8
12  
18  
12  
18  
36  
36  
36  
36  
45  
4
4
5
1
2
2
10  
5
10  
18  
18  
12  
36  
36  
36  
60  
75  
90  
5
5
2
2
10  
10  
12  
24  
36  
36  
5
5
1
2
10  
10  
24  
36  
24  
24  
*One elbow is required to make the vertical extension, See Figure 13.  
Figure 13 - Category I Horizontal Venting Requirements  
D-06838A  
14  
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Figure 14 - Vent Support  
D- 06839A  
15  
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HORIZONTALLY VENTED UNIT HEATERS  
(CATEGORY III)  
All venting of residential tubular unit  
The vent pipe equivalent length must  
Vent Systems  
Termination Clearance Requirements  
heaters must comply with the latest  
edition of CSA .10.96 (2nd ed.)  
requirement.  
not exceed 30 feet (9.14m) for the  
30 and 45 unit sizes, and 40 feet  
(12.2m) for the 60, 75 and 90 unit  
sizes. Equivalent length is the total  
length of straight sections PLUS 5  
feet (1.52m) for each 90 elbow and  
2.5 feet (0.76m) for each 45 elbow.  
Minimum  
Clearancesfor  
Termination  
Locations  
Structure  
Category III horizontal venting  
arrangements are designed to use  
single wall vent pipe. These arrange-  
ments must terminate external to the  
building using either single wall or  
double wall (Type B) vent. See  
Figures 15, 16, and 18 for installa-  
tion requirements regarding these  
venting conditions. If double wall  
venting is used, components that  
are UL Listed and approved for  
Category III positive pressure  
venting systems must be used  
with one exception: a single 5 foot  
(1.52 M) section of 4 inch (102mm)  
Type B vent pipe with a draft hood  
connector may be used between the  
appliance vent connection and  
the vent terminal. Use Metalbestos  
Type B Gas Vent with a Metalbestos  
4RV-DH Draft Hood Connector or  
Amerivent Type B Gas Vent with  
an Amerivent 4EDC Draft Hood  
Connector. See Figure 15A. If using  
a single section of Type B vent pipe,  
seal the annular space between  
the inner and outer sections of the  
draft hood connector with high  
temperature silicone sealant. See  
Figure 15B. Attach the draft hood  
connector to the appliance vent  
connection with screws and seal the  
joint with silicone sealant. Install a  
Type B vent thimble in the wall.  
Insert the vent pipe through the  
thimble and attach it to the adapter  
on the appliance. Seal the joint with  
silicone sealant or two wraps of  
aluminum foil tape. Install a vent cap  
on the outlet of the pipe and secure it  
with screws.  
4 feet  
below  
Door, window or  
any gravity air inlet  
4 feet  
horizontally  
Maintain 1 inch (25.4mm) between  
the vent pipe and combustible  
materials.  
1 foot  
above  
3 feet  
above  
Forced air inlet within 10 ft.  
Adjoining building or parapet  
Adjacent public walkways  
The vent terminal must be installed  
with a minimum horizontal clearance  
of 4 feet (1.2m) from electric meters,  
gas meters, regulators, and relief  
equipment.  
6 feet  
7 feet  
above grade  
The venting system for these  
appliances shall terminate at least  
4 feet (1.2m) below, 4 feet (1.2m)  
horizontal from, or 1 foot (0.3m)  
above any door, window, or gravity  
vent air inlet into the building.  
Seal all vent pipe joints and seams  
to prevent leakage. Use General  
Electric RTV-108, Dow-Corning  
RTV-732, or equivalent silicone  
sealant with temperature rating  
of 500°F; or 3M #425 aluminum foil  
tape (or equivalent). The vent air  
system must be installed to prevent  
collection of condensate. Pitch  
horizontal pipes downward 1/4 inch  
per foot (21mm per meter) toward  
the outlet for condensate drainage.  
The vent terminal must be at least  
12 inches (305mm) from the exterior  
of the wall that it passes through to  
prevent degradation of the building  
material by flue gases.  
The vent terminal must be at least  
1 foot (305mm) above grade, or in  
snow areas, at least 3 feet (1m) above  
the snow line to prevent blockage  
by snow.  
Horizontal portions of the venting  
systems shall be supported at  
maximum intervals of 4 feet (1.2m)  
to prevent sagging (in Canada,  
support at 3 feet (1m) minimum  
intervals).  
Through the wall vent for these  
appliances shall NOT terminate over  
public walkways, or over an area  
where the condensate or vapor could  
create a nuisance or hazard or could  
be detrimental to the operation of  
regulators, relief valves, or other  
equipment.  
Insulate single wall vent pipe exposed  
to cold air or running through  
unheated areas. Insulate vent pipe  
runs longer than 10 feet (3m).  
Insulation should be a minmum of  
1/2 inch thick foil faced fiberglass,  
1-1/2# density insulation.  
Each unit must have an individual  
vent pipe and vent terminal! Each  
unit MUST NOT be connected to  
other vent systems or to a chimney.  
An Amerivent Americap, Fields  
Starcap, or Metalbestos vent cap  
must be supplied by the customer for  
each power vented unit. The vent  
pipe diameter MUST be 4 inches  
(102mm).  
16  
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Figure 15 - Category III Horizontal Venting Requirements Using Single Wall Vent Pipe  
Figure 15A - Category III Horizontal Venting Requirements Using Type B Double Wall Vent Pipe  
Figure 15B - Type B Draft Hood Connector  
17  
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VENTING (continued)  
Figure 16  
Figure 17  
18  
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VENTING (continued)  
Figure 18  
Figure 19  
19  
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OPERATION  
POWER VENTED PROPELLER UNITS  
DIRECT SPARK IGNITION  
EXPLANATION OF CONTROLS (See Figure 20):  
8. The wall thermostat, supplied optionally, is a  
temperature sensitive switch that operates the  
vent system and ignition system to control the  
temperature of the space being heated. The thermo-  
stat must be mounted on a vertical, vibration-free  
surface free from air currents and in accordance with  
the furnished instructions (also refer to Electrical  
Section).  
1. Each Unit Heater comes equipped with a power vent  
system that consists of a power venter motor and  
blower, pressure switch, and sealed flue collector in  
place of the conventional draft diverter.  
2. The power venter motor is energized by the room  
thermostatthroughtheintegratedcontrolboardwhen  
a demand for heat is sensed. The pressure switch  
measures the flow through the vent system and  
energizes the direct spark ignition system beginning  
the pre-purge timing when the flow is correct.  
START-UP (Also refer to lighting instruction plate  
equipped on the unit)  
1. Open the manual gas valve in the gas supply line to  
the unit heater with union connection loose, purge  
air from the gas line. Tighten the union and check for  
leaks.  
The pressure switch MUST NOT  
be bypassed. The unit MUST NOT be fired unless  
the power venter is operating. An unsafe  
condition could result.  
Never use an open flame to detect  
gas leaks. Explosive conditions may exist wich  
could result in personal injury or death.  
3. The direct ignition system consists of an ignition  
control module and a gas valve. When the pre-purge  
period ends, the spark ignition system is energized,  
and the gas valve opens to supply gas to the burners.  
When the thermostat is satisfied, the vent system is  
de-energized and the valve closes to stop the flow of  
gas to the unit.  
4. The limit switch interrupts the flow of electric current  
to the control board, interrupting the flow of gas to the  
gas valve if the unit heater becomes overheated.  
5. The flame roll-out switch interrupts the flow of electric  
current to the control board, interrupting the flow of  
gas to the unit heater in the event of sustained flame  
roll-out from the burner area. If this switch trips,  
DETERMINE AND CORRECT THE CAUSE of the  
flame roll-out.  
2. Open the manual valve on the unit heater.  
3. Turn ON the electrical power.  
4. The unit should be under the control of the  
thermostat. Turn the thermostat to the highest point  
and determine that the power venter motor starts and  
the burners ignite. Turn the thermostat to the lowest  
point and determine that the power venter motor  
shuts off and the burners are extinguished.  
5. Turn the thermostat to the desired position.  
6. See Gas Input Rate and Adjustments sections.  
SHUT DOWN  
1. Turn the valve selector lever to the “OFF” position.  
6. Once the thermostat is satisfied, or the limit switch  
interrupts the flow of electric current to the control  
board, the unit will begin a post-purge period. When  
thepost-purgeperiodends, thepowerventermotoris  
de-energized.  
2. Turn off the electricity.  
3. To relight, follow “start-up” instructions.  
See Figure 20 for parts/identification.  
7. The fan operation is delayed 30  
seconds once the thermostat is  
Figure 20  
closed, and continues operation  
for30secondsafterthethermostat  
opens.The start-up fan delay  
must not exceed 30 seconds  
from a cold start.  
20  
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PRIMARY AIR SHUTTER ADJUSTMENT  
Primary air adjustment is made at the factory. No field adjustments are necessary.  
GAS INPUT RATE  
Check the gas input rate as follows (Refer to General 2. PROPANE GAS: An exact manifold pressure of  
Safety Information section for metric conversions).  
10.0 inches W.C. (2.5 kPa) must be maintained for  
proper operation of the unit heater. If the unit is  
equipped with a pressure regulator on the  
combination gas valve, follow steps "a" through "d"  
above. If the unit is not so equipped, the propane  
gas supply system pressure must be regulated to  
attain this manifold operating pressure.  
Never overfire the unit heater, as this  
may cause unsatisfactory operation, or shorten the  
life of the heater.  
1. Turn off all gas appliances that use gas through the  
same meter as the unit heater.  
3. The adjusted manifold pressure should not vary  
more than 10% from pressure specified in Tables 5  
& 6.  
2. Turn the gas on to the unit heater.  
3. Clock the time in seconds required to burn 1 cubic  
foot of gas by checking the gas meter.  
4. Insert the time required to burn one cubic foot of  
gas into the following formula and compute the input  
rate.  
Table 5 - Main Burner Orifice Schedule*  
TYPE OF GAS  
NATURAL  
PROPANE  
1075 BTU/Ft3  
(40.1 MJ/m3)  
2500 BTU/Ft3  
(93.1 MJ/m3)  
*
INPUT  
IN  
HEATING VALUE  
NO. OF  
BURNER  
ORIFICES  
3600 (Sec. per Hr.) X BTU/Cu. Ft.  
= Input Rate  
MANIFOLD  
PRESSURE  
3.5" W.C.  
(0.87kPA)  
10" W.C.  
(2.49 kPA)  
1000  
BTU  
Time (Sec.)  
FT 3/HR  
ORIFICE DRILL  
FT 3/HR  
ORIFICE DRILL  
FT 3/HR  
ORIFICE DRILL  
FT 3/HR  
ORIFICE DRILL  
FT 3/HR  
28  
49  
42  
49  
56  
49  
70  
49  
84  
47  
12  
57  
18  
57  
24  
57  
30  
57  
36  
55  
30  
45  
60  
75  
90  
2
3
4
5
5
For example:  
Assume the BTU content of one cubic foot of gas is  
1000, and that it takes 48 seconds to burn one cubic  
foot of gas.  
3600 x 1000  
= 75,000  
48  
ORIFICE DRILL  
*This schedule is for units operating at normal altitudes of 2000 ft. (610m)  
or less.  
NOTICE: If the computation exceeds, or is less than  
95% of the gas BTU/hr. input rating (see Table 1),  
adjust the gas pressure.  
When installed in Canada, any references to deration at altitudes in excess  
of 2000 ft. (610m) are to be ignored. At altitudes of 2000 to 4500 ft. (610 to  
1372m), the unit heaters must be orificed to 90% of the normal altitude  
rating, and be so marked in accordance with ETL certification.  
Adjust the gas pressure as follows:  
TUBULAR UNIT HEATER  
HIGH ALTITUDE DERATION  
This Tubular Unit Heater has been manufactured utilizing  
standard burner orifices and a normal manifold pressure  
setting as per the specifications shown on your unit  
rating plate (refer to Tables 3, 5 and 6).  
1. NATURAL GAS: Best results are obtained when  
the unit heater is operating at its full rated input  
with the manifold pressure of 3.5 inches W.C. (0.9  
kPa). Adjustment of the pressure regulator is not  
normally necessary since it is preset at the factory.  
However, field adjustment may be made as follows:  
a. Attach manometer at the pressure tap plug below  
the control outlet.  
All unit deration must be done through field adjustments  
by a qualified technician (refer to Table 6). Once the  
proper adjustments are made in the field, attach label  
#J17-06459 to the unit, and record adjusted manifold  
pressure, altitude of the unit installation and the  
technician’s name and date on the label using a  
permanent marker.  
b. Remove the regulator adjustment screw cap,  
located on the combination gas valve.  
c. With a small screwdriver, rotate the adjustment  
screw counterclockwise to decrease pressure,  
or clockwise to increase pressure.  
d. Replace regulator adjustment screw cap.  
21  
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Table 6  
NATURAL GAS  
PROPANE (LP) GAS  
NATURAL GAS  
PROPANE (LP) GAS  
*Heating  
Value  
BTU/Cu. ft.  
Manifold  
Pressure  
(In. W.C.)  
*Heating  
Value  
BTU/Cu. ft.  
Manifold  
Pressure  
(In. W.C.)  
*Heating  
Value  
BTU/Cu. ft.  
Manifold  
Pressure  
(In. W.C.)  
*Heating  
Value  
BTU/Cu. ft.  
Manifold  
Pressure  
(In. W.C.)  
Altitude  
(Feet)  
Altitude  
(Feet)  
948  
931  
914  
897  
881  
865  
849  
833  
818  
3.2  
3.2  
3.2  
3.1  
3.1  
3.1  
3.0  
3.0  
2.9  
2,000  
2,500  
3,000  
3,500  
4,000  
4,500  
5,000  
5,500  
6,000  
2,278  
2,237  
2,196  
2,156  
2,116  
2,077  
2,039  
2,000  
1,964  
10.0  
10.0  
10.0  
10.0  
10.0  
9.9  
9.7  
9.6  
9.5  
6,500  
7,000  
7,500  
8,000  
8,500  
9,000  
9,500  
10,000  
802  
787  
771  
756  
741  
726  
711  
696  
2.9  
2.8  
2.8  
2.8  
2.7  
2.6  
2.6  
2.5  
1,927  
1,891  
1,853  
1,817  
1,781  
1,745  
1,709  
1,673  
9.3  
9.2  
9.0  
8.9  
8.7  
8.5  
8.3  
8.1  
*Notes:  
1. Consult local utility for actual heating value.  
2. Tables based on heating value of 1,050 BTU/Cu. ft. at sea level.  
MAINTENANCE  
PERIODIC SERVICE  
3. Remove service panel.  
4. To clean or replace the burners, remove the four  
screws holding the manifold to the burner box and  
pull the manifold back slightly to disengage the orifices  
from the burners. Remove each burner by holding it  
against the tab on the burner bracket, then rotate the  
inlet end of the burner toward the fan side of the unit  
and slide the burner off the tabs. See Figure 20.  
5. With the burners removed, wire brush the inside  
surfaces of the heat exchanger.  
NOTICE: The heater and vent system should be  
checked once a year by a qualified technician.  
All Maintenance/Service information should be recorded  
accordingly on the Inspection Sheet provided in this  
manual.  
Open all disconnect switches and  
disconnect all electrical and gas supplies and  
secure in that position before servicing unit.  
Failure to do so may result in personal injury or  
death from electrical shock.  
6. Remove any dirt, dust, or other foreign matter from  
the burners using a wire brush and/or compressed  
air. Ensure that all parts are unobstructed.  
7. Reassemble the unit heater by replacing all parts in  
reverse order.  
8. Complete the appropriate unit startup procedure as  
given in the “Operation” section of this manual. (See  
lighting instruction on the unit nameplate).  
9. Check the burner adjustment.  
10. Check all gas control valves and pipe connections  
for leaks.  
11 Check the operation of the automatic gas valve by  
lowering the setting of the thermostat, stopping the  
operation of the gas unit heater.The gas valve  
should close tightly, completely extinguishing the  
flame on the burners.  
Gas tightness of the safety shut-  
off valves must be checked on at least an annual  
basis.  
To check gas tightness of the safety shut-off valves, turn  
off the manual valve upstream of the appliance  
combination control. Remove the 1/8 inch pipe plug on the  
inlet side of the combination control and connect a  
manometer to that tapping. Turn the manual valve on to  
apply pressure to the combination control. Note the  
pressure reading on the manometer, then turn the valve  
off. A loss of pressure indicates a leak. If a leak is detected,  
use a soap solution to check all threaded connections. If  
no leak is found, combination control is faulty and must be  
replaced before putting appliance back in service.  
12. Inspect and service motor/fan assembly. To maintain  
efficient air flow, inspect and clean the fan blades  
and guard to prevent buildup of foreign matter.  
13. Check lubrication instructions on motor. If oiling is  
required, add 3 or 4 drops of electric motor oil as  
follows:  
Should maintenance be required, perform the following  
inspection and service routine:  
a. Light Duty - After 3 years or 25,000 hours of  
operation.  
b. Average Duty - Annually after 3 years or 8,000  
hours of operation.  
1. Inspect the area near the unit to be sure that there is  
no combustible material located within the minimum  
clearance requirements listed in this manual.  
Under no circumstances should  
combustible material be located within the  
clearances specified in this manual. Failure to  
provide proper clearance could result in  
personal injury or equipment damage from fire.  
c. Heavy Duty - Annually after 1 year or at least  
1500 hours of operation.  
Never over oil the motor or premature  
failure may occur!  
14. Check and test the operational functions of all safety  
devices supplied with your unit.  
2. Turn off the manual gas valve and electrical power  
to the unit heater.  
22  
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Table 7 - Tubular Propeller Troubleshooting Guide  
POSSIBLE CAUSE(S) CORRECTIVE ACTION  
SYMPTOMS  
A. Flame pops back.  
1. Burner orifice too small.  
1. Check with local gas supplier for proper orifice  
size and replace. Refer to “Operation”.  
B. Noisy Flame.  
1. Irregular orifice causing whistle or resonance.  
2. Excessive gas input.  
1. Replace orifice.  
2. Test and reset manifold pressure.  
C. Yellow tip flame (some yellow  
tipping on LP gas is permissible).  
1. Clogged main burners.  
2. Misaligned orifices.  
3. Insufficient combustion air.  
4. Possibly over fired.  
1. Clean main burner ports.  
2. Replace manifold assembly.  
3. Insufficient combustion air.  
4. Check gas input and manifold pressures.  
D. Floating flame.  
E. Gas odor.  
1. Blocked venting.  
1. Clean Flue. Refer to “Installation”.  
2. Insufficient combustion air.  
3. Blocked heat exchanger.  
4. Air leak into combustion chamber  
or draft hood.  
2. Clean combustion air inlet openings.  
3. Clean heat exchanger. Refer to “Installation”.  
4. Determine cause and repair accordingly.  
1. Shut off gas supply immediately!  
2. Leaking gas test port on valve.  
3. Blocked heat exchanger.  
1. Inspect all gas piping and repair.  
2. Check to ensure gas test ports are seated.  
3. Clean heat exchanger/flue.  
4. Clean flue collector.  
4. Blocked draft hood.  
5. Negative pressure in the building.  
5. See “Installation”.  
F. Delayed ignition.  
1. Improper ground.  
1. Check grounding wires and spark bracket  
connections.  
2. Bad or broken spark cable.  
3. Faulty control.  
2. Inspect spark cable connections and cuts.  
3. Check to ensure spark is energized after  
pre purge period.  
4. Pressure regulator set too low.  
4. Test and reset manifold pressure refer to  
“Operations”.  
5. Main burner orifices dirty.  
6. Improper venting.  
5. Clean or replace orifices.  
6. Refer to “Installation”.  
G. Failure to ignite.  
1. Gas supply is off.  
2. No power supply to unit.  
1. Open all manual valves “check for leaks”.  
2. Turn on power supply, check fuses and  
replace if bad.  
3. Thermostat not calling.  
4. Defective high limit.  
3. Turn up thermostat, Check for 24v on  
terminals R and W1 on terminal strip.  
4. Check switch for continuity if open with no  
heat present, replace.  
5. Defective drafter prove switch.  
5. Check switch operation to ensure  
switch closes after draftor purge period.  
If it does not make/check tubing  
connections/ blockage.  
6. Check all wiring per diagram.  
6. Loose wiring.  
7. Improper ground.  
8. Improper thermostat or transformer wiring.  
7. Check all ground wires and connections.  
8. Check both, for wiring according to diagram;  
check for 24V at gas valve terminals during  
trial for ignition period if present and valve  
does not open. Replace valve.  
H. Condensation.  
1. Improper venting.  
2. Unit under fired.  
1. Refer to “Installation, Venting”.  
2. Check gas supply pressures to unit. Refer  
to “Installation”.  
3. Building too cold.  
3. Refer to “Installation”.  
23  
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Table 7 - Tubular Propeller Troubleshooting Guide (continued)  
POSSIBLE CAUSE(S)  
CORRECTIVE ACTION  
SYMPTOMS  
I. Burners will not shut off.  
1. Thermostat located incorrectly.  
1. Relocate thermostat away from outside  
wall or drafts.  
2. Improper thermostat wiring.  
3. Shorted circuit.  
2. Check thermostat circuit for open and close  
on terminal strip on heater “R” and “W”.  
3. Check thermostat circuit for shorts “staples  
piercing wires”.  
4. Defective sticking gas valve.  
5. Excessive gas supply pressure.  
4. Check for 24v on gas valve terminals when  
thermostat is not calling.  
5. Refer to “Installation”.  
J. Rapid burner cycling.  
1. Loose electrical connections at thermostat  
or gas valve.  
2. Excessive thermostat heat  
anticipator setting.  
3. Unit cycling on high limit.  
4. Poor thermostat location.  
1. Tighten all electrical connections.  
2. Adjust heat anticipator setting for longer  
cycles. Refer to “Electrical Connections”.  
3. Check for proper air supply across heat  
exchanger and proper gas supply.  
4. Relocate thermostat .  
K. Noisy power ventor.  
L. Fan will not run.  
1. Power ventor wheel loose.  
2. Power ventor wheel is dirty.  
3. Power ventor wheel is rubbing on the housing.  
1. Replace or tighten.  
2. Clean power ventor wheel.  
3. Realign power ventor wheel.  
1. Loose electrical connections.  
2. Defective motor or overload.  
1. Check and tighten wires on fan circuit.  
2. Test for 115v on terminal ACB Heat and  
“L2” if voltage is present replace motor.  
3. Test for 115v on terminal ACB Heat and “L2”  
on the control board, if voltage is not present  
45 seconds after trial for ignition replace  
board.  
3. Defective control board.  
M. Fan motor turns on and off  
while burner is operating.  
1. Motor overload protection is tripping.  
1. Check motor amps against motor name  
plate, check voltage, replace if found defective.  
2. Check for 115v between motor leads.  
3. Check terminal ACB Heat for voltage if  
voltage not constant, replace board.  
2. Loose wiring or connection.  
3. Control board is defective.  
N. Fan will not stop.  
O. Not enough heat.  
1. Control Board is in flame failure mode.  
1. Turn 115v power off to the unit, wait 10  
seconds and reapply voltage to the unit.  
2. Check wiring of fan circuit to wiring diagram.  
3. If unit is not calling for heat and board is not  
in a flash code mode, replace board.  
2. Fan improperly wired.  
3. Defective board.  
1. Incorrect gas input.  
2. Heater undersized.  
1. Refer to “Operation”.  
2. Is the heater output sized correctly for  
heat loss of the space. Has the space  
been enlarged.  
3. Thermostat malfunction.  
4. Heater cycling on limit.  
3. Check thermostat circuit, 24v on terminals  
“R” and “W” on terminal strip.  
4. Check air movement across heat exchanger.  
Check voltage and amps at the fan motor.  
Check gas input to ensure unit is not over  
fired. Check heat exchanger to ensure unit  
is not dirty.  
5. Incorrect orifice sizes.  
1. Unit is over fired.  
5. Check orifice size, replace if undersized.  
P. Too much heat.  
1. Refer to “Operation”. Check orifice size.  
If too big replace.  
2. Thermostat malfunction.  
3. Heater runs continuously.  
2. Check thermostat for operation, to ensure  
circuit open and closes.  
3. Check wiring per diagram; check  
operation at the gas valve, look for  
a short in thermostat circuit.  
24  
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Table 7 - Tubular Propeller Troubleshooting Guide  
POSSIBLE CAUSE(S)  
CORRECTIVE ACTION  
SYMPTOMS  
Q. Cold air is delivered during  
heater operation.  
1. Incorrect manifold pressure or input.  
2. Air throughput too high.  
1. Refer to “Operation”.  
2. Refer to “Operation”.  
R. High limit tripping.  
1. Unit is over fired.  
2. Air flow is low.  
1. Burner orifices may be too large, verify  
and replace.  
2. Check for proper voltage, ensure fan  
blade is correct.  
3. Defective switch.  
3. Check operation of switch, did the switch  
open when unit is running or is the switch  
open during start-up.  
4. Defective control board.  
4. Check for 24v on line side of the high limit.  
Constant voltage should be recorded if not  
control board is suspect. Check flash code.  
S. Power ventor will not run.  
1. Loose wiring or connections.  
2. Motor overload is tripped or bad motor.  
3. Bad control board.  
1. Check all wring in the power vent circuit to  
ensure good connection, including “Neutral”.  
2. Check for 115v between motor leads and  
check amp draw of motor. Replace if needed.  
3. Check for continuous 115v on terminal  
“CBM Blower” and neutral during call for  
heat. If not present and all checks are  
normal, replace.  
T. Power ventor turns on and off  
during operation.  
1. Power ventor improperly wired.  
2. Motor overload cycling or defective motor.  
3. Defective control board.  
1. Check power ventor circuit per wiring  
diagram.  
2. Check motor voltage and amp draw to motor  
name plate, replace if motor found defective.  
3. Check for continuous 115v on terminal  
“CMB Blower” during call for heat, replace  
board if found defective.  
U. Power ventor will not stop.  
1. Power ventor improperly wired.  
2. Main burner did not light on call for heat.  
3. Defective control board.  
1. Check power ventor circuit per wiring  
diagram.  
2. Heater is in lockout mode check flash code  
table for problem.  
3. No flash codes present along with no call  
for heat, replace control board.  
25  
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Table 8 - Troubleshooting with LED Indicator Assistance  
No Cycling or appliance power  
INDICATES  
Control OK, no call for heat.  
CHECK/REPAIR  
Not Applicable  
LED STATUS  
Slow Flash  
or thermostat call for heat  
since appliance failure has  
occured.  
Fast Flash  
Steady Off  
Control OK, call for heat present.  
Internal control fault, or no power.  
Not Applicable  
1. Line voltage on terminals 120  
and C on transformer.  
2. Low voltage (24V) on terminals  
24 and C on transformer.  
3. 5 Amp fuse on circuit board.  
Line voltage power can  
cause product damage,  
severe injury or death.  
Only a trained experienced  
service technician should  
perform this trouble-  
shooting.  
Steady On  
2 Flashes  
Control internal failure or bad ground.  
1. Common side of transformer  
grounded to chassis.  
2. Loose spark ignitor.  
In lockout from failed ignitions  
or flame losses.  
1. Gas supply off or gas supply  
pressure too low.  
2. Flame sense rod contaminated  
or loose wire.  
3. Gas valve switch is off or wires  
are not connected.  
4. Broken or cracked porcelain on  
flame probe or spark ignitor.  
1. Check the system thermo-  
stat to make sure it is call-  
ing for heat. (Do not cycle  
the thermostat on and off  
at this time.)  
2. Remove the appliance  
burner compartment door.  
Do not interrupt power to  
the control board by  
opening any electrically  
interlocked panels.  
3. Observe the LED indicator  
on the control board (a  
green LED labeled “OK”  
indicates system faults);  
check and repair system as  
noted in the chart to the  
right.  
3 Flashes  
Pressure Switch open with inducer on  
or closed with inducer off.  
1. Obstructions or restrictions  
in appliance air intake or flue  
outlet are preventing proper  
combustion airflow.  
2. Moisture or debris in tubing that  
connects pressure switch and  
draft inducer.  
3. Airflow switch jumpered or  
miswired.  
4 Flashes  
Limit or rollout switch is open.  
1. Open manual reset rollout switch.  
2. Gas pressure too high, over fire  
condition.  
3. Incorrect airflow due to blockage  
or motor not operating.  
5 Flashes  
6 Flashes  
Flame sensed while gas valve is off.  
On-board microprocessors disagree.  
1. Flame probe miswired  
or shortened.  
1. Thermostat is interfering  
with control board.  
*NOTICE: Air flow proving  
switch and power venter  
hose barbs must be free of  
any dust or debris at all  
times. Periodically check  
these openings and/or if any  
problems occur.  
26  
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IDENTIFICATION OF PARTS  
RESIDENTIAL TUBULAR 30-90 MBH UNIT SIZES  
Item  
No. ItemDescription  
Vestible Panel/Tube Ass’y  
1
(Heat Exchanger)  
Manifold Bracket Sub-Ass’y  
Manifold  
2
3
4
Inshot Burner  
*Standard Orifice  
Natural Gas or Propane (LP) Gas  
5
6
7
Spark Ignitor  
Flame Sensor  
Gas Valve, Single Stage  
Natural or Propane (LP) Gas  
8
9
Manual Rollout Safety Switch  
10 Transformer, 50 VA, 115/24  
11 Air Pressure Switch  
12 Terminal Block Plate  
High Limit Switch  
13  
w/Mounting Bracket  
14 Fan Motor  
15 OSHA Fan Guard  
16 Standard Fan  
Fan/Guard/Motor Mount  
Hardware Kit  
17  
18 **Flue Collector  
19 Power Venter (Drafter) Ass’y  
20 Flue Collar Ass’y  
21 Vinyl Tubing (Pressure Switch)  
22 Power Venter Mounting Plate  
23 Louver  
24 Louver Spring  
25 Control Board  
26 Service Panel  
27 Top Jacket Panel w/Insulation  
27 Bottom Jacket Panel w/Insulation  
29 Front Jacket  
30 Rear Jacket  
31 Front Hanger  
31 Rear Hanger  
32 Tube Support Bracket  
33 Green Ground Screw  
*** The orifices shown are for units  
operating at normal altitudes of 0 to  
2000 ft. (610m).  
*** When replacing a flue collector, make  
sure that the flue collector box is sealed  
completely to the vestibule panel using  
RTV Sealant.  
27  
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IDENTIFICATION OF PARTS  
RESIDENTIAL TUBULAR 30-90 MBH UNIT SIZES  
Figure 21 - Propeller Parts  
Figure 22 - Component Parts  
Fan Blade  
Fan Guard  
Motor  
D4791  
Hardware  
Pressure Switch  
Hardware  
D4430  
NOTE: No rubber grommets are equipped with the 30 and 45  
unit sizes.  
D6963  
Gas Valve  
Figure 23 - Internal Furnace Components  
Figure 24 - Power Ventor Assembly  
D4810  
28  
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HOW TO ORDER REPLACEMENT PARTS  
Please send the following information to your local representative: if further assistance is needed, contact the  
manufacturer's customer service department.  
•Model Number  
•Serial Number (if any)  
•Part Description and Number as shown in Replacement parts Catalog  
LIMITED WARRANTY  
Residential Power Vented Tubular Propeller Unit Heaters  
1. The "Manufacturer" warrants to the original owner at original installation site that the above model Gas-Fired  
Heater ("the Product") will be free from defects in material or workmanship for (1) year from the date of  
shipment from the factory, or one and one-half (1-1/2) years from the date of manufacture, whichever occurs  
first. The Manufacturer further warrants that the complete heat exchanger, flue collector and burners be free  
from defects in material or workmanship for a period of ten (10) years from the date of manufacture. If upon  
examination by the Manufacturer the Product is shown to have a defect in material or workmanship during the  
warranty period, the manufacturer will repair or replace, at its option, that part of the Product which is shown  
to be defective.  
2. This limited warranty does not apply:  
a. if the product has been subjected to misuse or neglect, has been accidentally or intentionally damaged,  
has not been installed, maintained, or operated in accordance with furnished written instructions, or has  
been altered or modified in any way by any unauthorized person.  
b. to any expenses, including labor or material, incurred during removal or reinstallation of the Product  
c. to any damage due to corrosion by chemicals, including halogenated hydrocarbons, precipitated in the air  
d. to any workmanship of the installer of the Product  
3. This limited warranty is conditional upon:  
a. advising the installing contractor, who in turn notify the distributor or manufacturer  
b. shipment to the Manufacturer of that part of the Product thought to be defective. Goods can only be  
returned with prior written approval of the Manufacturer. All returns must be freight prepaid.  
c. determination in the reasonable opinion of the Manufacturer that there exists a defect in material or  
workmanship  
4. Repair or replacement of any part under this Limited Warranty shall not extend the duration of the warranty  
with respect to such repaired or replaced part beyond the stated warranty period.  
5. THIS LIMITED WARRANTY IS IN LIEU OF ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, AND  
ALL SUCH OTHER WARRANTIES, INCLUDING WITHOUT LIMITATION IMPLIED WARRANTIES OF  
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE HEREBY DISCLAIMED AND  
EXCLUDED FROM THIS LIMITED WARRANTY. IN NO EVENT SHALL THE MANUFACTURER BE LIABLE  
IN ANY WAY FOR ANY CONSEQUENTIAL, SPECIAL, OR INCIDENTAL DAMAGES OF ANY NATURE  
WHATSOEVER, OR FOR ANY AMOUNTS IN EXCESS OF THE SELLING PRICE OF THE PRODUCT OR  
ANY PARTS THEREOF FOUND TO BE DEFECTIVE. THIS LIMITED WARRANTY GIVES THE ORIGINAL  
OWNER OF THE PRODUCT SPECIFIC LEGAL RIGHTS. YOU MAY ALSO HAVE OTHER RIGHTS WHICH  
MAY VARY BY JURISDICTION.  
In the interest of product improvement, we reserve the right to make changes without notice.  
29  
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GAS EQUIPMENT  
START-UP  
Customer ____________________________________ Job Name & Number _________________________  
PRE-INSPECTION INFORMATION  
With power and gas off.  
Type of Equip:  
Unit Heater  
Serial Number _________________________ Model Number __________________________  
Name Plate Voltage:  
Type of Gas:  
_____________  
Natural  
Name Plate Amperage: _____________  
LP  
Tank Capacity _______ lbs.  
_______ kg  
Rating: ______ BTU @ ____ °F  
______ kw @ ____ °C  
Are all panels, doors, vent caps in place?  
Has the unit suffered any external damage?  
Damage ______________________________  
Does the gas piping and electric wiring appear to be installed in a professional manner?  
Has the gas and electric been inspected by the local authority having jurisdiction?  
Is the gas supply properly sized for the equipment?  
Were the installation instructions followed when the equipment was installed?  
Have all field installed controls been installed?  
Do you understand all the controls on this equipment? If not, contact your wholesaler or rep.  
(DO NOT START this equipment unless you fully understand the controls.)  
GENERAL  
GAS HEATING  
With power and gas off.  
With power and gas on.  
Make certain all packing has been removed.  
Tighten all electrical terminals and connections.  
Check all fans & blowers for free movement.  
Check all controls for proper settings.  
Inlet gas pressure.  
Burner ignition.  
____ in. W.C. or ____ kPa  
Manifold gas pressure. ____ in. W.C. or ____ kPa  
Cycle on HIGH LIMIT.  
Cycle and check all other controls not listed.  
Cycle by thermostat or operating control.  
BLOWER  
With power on and gas off.  
Check voltage L1 _____ L2 _____ L3 _____  
Check rotation of main blower.  
Check motor amps L1 _____ L2 _____ L3 _____  
Blower RPM _____________  
Check air filters. (Record quantity & size.)  
Remarks:  
_____________________________________________  
__________________________________________________  
__________________________________________________  
30  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Download from Www.Somanuals.com. All Manuals Search And Download.  

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