Service
Handbook
For Self-Cleaning
Induced Draft
Multi Flue Commercial
Gas Water Heaters
SBN 71120 through 85390 (A)
SERIES 100 Models
SBN Meets Low NOx Requirements of SCAQMD
Rules 1121 & 1146.2
Part No. STC-074
$20.00 Printed in the U.S.A. 0204
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SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
TABLE OF CONTENTS
Troubleshooting - Conditions ............................................................. 34
LED Troubleshooting ........................................................................... 36
Parts List ............................................................................................... 38
General Questions and Answers ........................................................ 41
Electrical Information ........................................................................... 44
Draft Proving (Pressure) SwitchTable ................................................ 44
SBN Service Handbook Introduction
This service handbook is a supplement to the SBN Installation and Operation Manual.
The handbook provides information on servicing and troubleshooting State Industries
SBN water heaters in the field. While this handbook is not intended to be all inclusive, it
contains:
•
step-by-step procedures with illustrations to verify proper installation, operation,
and troubleshooting
•
•
quick reference data to assist in servicing the product line
answers to common questions encountered in the operation of the product
line
The handbook is intended to be used by licensed plumbing professionals. Reference
should be made to the installation manual accompanying the product. If you are
experiencing a problem not covered in this handbook, please contact the State
Industries Technical Information Department at 1-800-527-1953 or your local State
Industries representative for further assistance.
No duplication or reproduction of this book may be made without the expressed
written authorization of the State Industries.
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SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
Qualifications
Installation or service of this water heater requires ability equivalent to that of a
licensed tradesman in the field involved. Plumbing, air supply, venting, gas supply and
electrical testing skills are required.
Tools Required
• Phillips head screwdriver
• standard screwdrivers
• 3/8 and 7/16 inch open end wrench
• set of marked drill bits
• electrical multimeter tester capable of measuring continuity, AC voltage and DC
voltage
• gas pressure gauge or manometer (gauge - pt. no. 8099-2)
• water pressure gauge (pt. no. 4798)
• thermometer (pt no. 4870 - range 0 - 220 degrees F)
• 1/2 inch socket with extension for removal of the clean out cover
• 1-1/16 inch socket with extension for anode removal
Custom Commercial Storage Tank Model Number Break Down
1 2 5
U
G
V
6 6
0 1 5 0 0
V
A
ASME Pressure Rating =
100# or 125# or 150# or 160#
V = Vertical
H = Horizontal
Gallon Capacity
V = 5 Year
Warranty
U = Unjacketed
J = Jacketed
A = ASME
Diameter
G = Glass-Lined
E= Epoxy
B = Black Steel
C + Cement
SPECIAL NOTE: All model number appearing on rating plate and carton labels will
be compressed. Example: UGV6601500VA125
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SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
INSTALLATION CONSIDERATIONS
This portion of the handbook reviews some often overlooked installation considerations
—clearances, air supply, gas pressure requirements, and venting—taking note
of necessary installation requirements for SBN . The installation manual
covers most of these items in detail.
Clearances
A 24-inch clearance for all serviceable parts is recommended. Clearances may vary
between models. See instruction manual or the label on the heater for clearances
applicable to your specific model.
Top and Front Views of Minimum Clearances To Combustibles
Minimum Clearances To Combustibles
Model
"A" Right
Side
2"
"B" Left Side
"C" Back
"D"
Ceiling
12"
12"
6"
SBN 71-120NE, SBN- 81-154NE, SBN 81-180NE, SBN 100-199NE
SBN 100-250NE(A), SBN 100-275NE(A), SBN 85-310NE(A)
SBN 85-366NE(A)
2"
3"
6"
4"
2"
3"
6"
4"
3"
6"
4"
SBN 85-390NE(A)
4"
A, B, and C clearances to non-combustibles is “0” inches - a 12 inch clearance to cover
remains unchanged.
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SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
Exterior Clearance
The illustration below shows the required clearances for venting units using
natural draft venting.
Required Exterior Clearances
“Copyright by the American Gas Association. Used by permission of the copyright holder”.
The vent must extend at least 3 feet above the highest point where it passes through
a roof of a building and at least 2 feet higher than any portion of a building within a
horizontal distance of 10 feet (for vents of 12 inches in diameter or less).
References: NFPA 54 ANSI Z 223.1 SEC 7.5.2a and Sec 7.6.2a may allow reduction
to 8 feet with a “listed vent cap.”
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SBN TANK TYPE COMMERCIAL GAS WATER HEATER
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Air Supply
Stoichiometric or theoretical complete combustion requires 10 cubic feet of air per
1,000 BTUH of gas supplied. The National Fuel Gas code also recommends an
additional 2.5 cubic feet of “excess” air.
For information on minimum make-up air opening sizes for various building installations,
refer to the National Fuel Gas Code NFPA 54, ANSI Z223.1, Sec. 5.3.
10 CU.
FT.
COMB.
1,000
AIR
BTU
2.5 CU.
FT.
EXCESS
AIR
Insufficient make-up air is a major cause of combustion problems.
Insufficient Make-Up Air - Backdraft
One common example is in a restaurant installation where exhaust vent equipment was
not considered in sizing make-up requirements. This condition may result in air being
backdrafted by the restaurant exhaust equipment through the heater causing the draft
proving switch to open and/or erratic heater shutdown.
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SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
A fresh supply of make-up air for combustion can be supplied to the heater through
make-up air ducts, which directly communicate with the outdoors.
Make-Up Air – Direct Communication
(Not Direct Vent)
Two openings are required: one within 12 inches of the top of the enclosure and one
within 12 inches of the bottom of the enclosure. Each opening must have a free area
of not less than 1 square inch per 4,000 BTUH of the total input of all appliances
within the enclosure.
The lower opening primarily provides combustion air. The upper opening provides
vent dilution air and acts as a relief opening for flue gases should the vent become
obstructed or a downdraft condition occur. Additionally, when the heater is installed in
a confined space and communicating with the outdoor air, one permanent opening,
beginning within 12 inches (30 cm) of the top of the enclosure, must be permitted
where the equipment has clearances of at least 1 inch (2.5 cm) from the sides and
back, and 6 inches (16 cm) from the front of the appliance. The opening must directly
communicate with the outdoors and must communicate through a vertical or
horizontal duct to the outdoors or spaces (crawl or attic) that freely communicate with
the outdoors, and must have a minimum free area of a) 1 square inch per 3,000 BTUH
(7cm2 per kW) of the total input of all equipment located in the enclosure and b) not
less than the sum of the areas of all vent connectors in the confined space.
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SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
Often, it is more practical to install vertical make-up ducts to the outdoors.
Make-Up Air - Vertical Ducts
Again, two openings are required: one within 12 inches of the top of the enclosure
and one within twelve inches of the bottom of the enclosure. Each opening must
have a free area of not less than 1 square inch per 4,000 BTUH of the total input of
all appliances within the enclosure.
Make-Up Air - Horizontal Ducts
When the heater is installed in an interior room with no roof access for vertical ducts,
horizontal make-up air ducts should be installed. When using horizontal ducts, two
openings are required - one within 12 inches of the top of the enclosure and one within
12 inches of the bottom of the enclosure. Each opening must have a free area of not
less than 1 square inch per 2,000 BTUH of the total input of all appliances within the
enclosure.
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SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
Along with adequate make-up air, the quality of the air is important.
Contaminated Air
Rust
Chips
Contaminants in combustion air can lead to premature heater failure. Vapors from
bleaches, soaps, waxes, salts, etc. are drawn into the combustion chamber with the
make-up air and, once fired, mix with water vapor in the gases to form extremely
corrosive hydrochloric or hydrofluoric acid and other corrosive by-products.
Air for Combustion – Flammable Items
Flammable items, pressurized containers or any other potentially hazardous articles
must never be placed on or adjacent to the heater. Open containers of flammable
material should not be stored or used in the same room with the heater.
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SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
Gas Valve
The supply gas pressure is
normally measured at the gas
valve inlet gas pressure tap,
if available, when the gas is flowing.
The manifold gas pressure
is measured at the manifold
pressure tap of the gas valve
when the gas is flowing.
Inlet View
Gas valves used are 24 volt AC
combination-step opening gas
valves. They incorporate the
main valve and gas pressure
regulator into one body. The
Low Gas Pressure Switch, the
Supply Gas Inlet, and the
Supply Gas Pressure Tap are
shown in the Inlet View to the
right.
Top View
The top view of the gas valve,
shown on the right, shows the
Main Gas Regulator, Manifold
Pressure Tap, Top Knob, and the
Limited Bleed Vent Port. The main
gas regulator is found under the
silver cap screw. It is factory preset
to 3.5 inches W.C. and
adjusts gas pressure output
from 3.0 to 5 inches water
column. Caution: Always test
the manifold pressure at the
outlet when the gas is flowing.
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SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
Outlet View
The outlet view of the Gas
Valve, shown on the right,
shows the Manifold Gas
Outlet Connection, the two
24 volt Main Valve (MV)
Solenoid connections, and
the Manifold Pressure Tap.
The two yellow wires from
the 12-pin plug on the
Ignition Board attach to the
MV terminals.
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SBN TANK TYPE COMMERCIAL GAS WATER HEATER
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Venting
All SBN water heaters are classified by ANSI as Category I (non-condensing,
negative pressure venting) appliances. They are approved for type B vent. The draft
inducer does not pressurize the exhaust.
Venting – Atmospheric Multiple Heaters
For larger applications, SBN water heaters can be common vented together,
either in a tapered manifold or constant size manifold. Follow the National Fuel Gas
Codes requirements for sizing and installation of fan-assisted products.
SBN Models may be common vented only with other Category I appliances. See the
Venting Section in the National Fuel Gas Code.
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SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
When vents are combined, the area of the com-
bined vent should be equal to area of the largewst
single vent, plus 50% of area of all others joining.
NINE RULES FOR
GOOD VENTS
EXAMPLE: To combine two 6” vents with
an 8” vent, the area of a
combined vent should be
one half area of two 6 inch
vents (14 + 14) plus area of 8 inch vent (50)
or 78 sq. inches. Referring to char, 78
sq. inches require 10” diameter vent.
Areain
Areain
Vent Size
Square Inches Vent Size Square Inches
5"
6"
7"
8"
9"
20
28
38
50
64
10"
12"
14"
16"
18"
79
113
154
201
254
1. The vent pipe should ALWAYS
be the same size as the outlet of
the draft diverter or factory
supplied vent reducer.
• Model SBN 120 are
supplied with a 6” to 5”
reducer.
• Models SBD 250, 251
and 275 are supplied
with a 8” to 6” reducer.
2. The diameter of a vent pipe
should NEVER be reduced, no
matter what the circumstances.
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SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
3. In some cases it may be
necessary to run a vent larger
than the draft diverter outlet.
4. Take the maximum vertical
rise possible immediately
above the draft diverter.
6. Horizontal pipe should be sloped
upward at a minimum of ¼” per foot.
5.
7. Horizontal elements should be limited to
75% of the vertical rise of the vent above
the connection.
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SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
8. Flue gases must be kept hot for
proper venting.
9. Obstructions can cause down
drafts.
The vent pipe should be extended to
meet local codes.
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SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
TYPE B GAS VENT
Multiple Gas Fired Tank-Type Heaters
When venting multiple tank type heaters using Type
B vent pipe, follow the installation diagram (figure 4) and
tables below which give sizing and data based upon NFPA
54/ANSI Z223. 1992.
MODEL SBN 71-120NE
Input: 120,000 Btu/hr
Vent Connector Size: 5 inches
Input Btu/hr
Total Vent Height (Feet)
6
8
10 15 20 30 50 100
Rise
1 Ft.
2 Ft.
3 Ft.
Vent Connector Diameter (Inches)
120,000
120,000
120,000
6
5
5
6
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
Number of
Heaters
Combined Input
in Thousands of Btu/hr
240,000
Manifold and Common Vent Diameter (Inches)
2
7
8
9
7
8
9
6
7
9
6
7
8
6
7
8
6
6
7
6
6
7
6
6
6
3
4
360,000
480,000
MODEL SBN 81-154NE
Input: 154,000 Btu/hr
Total Vent Height (Feet)
Vent Connector Size: 6 inches
6
8
10 15 20 30 50 100
Input Btu/hr
154,000
154,000
Rise
1 Ft.
2 Ft.
3 Ft.
Vent Connector Diameter (Inches)
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
154,000
Number of
Heaters
2
3
4
Combined Input
in Thousands of Btu/hr
308,000
Manifold and Common Vent Diameter (Inches)
7
8
9
7
8
9
6
7
9
6
7
8
6
7
8
6
6
7
6
6
7
6
6
6
462,000
616,000
MODEL SBN 81-180NE, SBN 100-199NE
Input: 180,000, 190,000 and 199,000 Btu/hr
Vent Connector Size: 6 inches
Total Vent Height (Feet)
10 15 20 30 50 100
6
8
Input Btuh/hr
Rise
Vent Connector Diameter (Inches)
180,000
190,000
199,000
180,000
190,000
199,000
180,000
190,000
1 Ft.
1 Ft.
1 Ft.
2 Ft.
2 Ft.
2 Ft.
3 Ft.
3 Ft.
7
7
7
6
7
7
6
6
7
7
7
6
6
7
6
6
6
7
7
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
199,000
3 Ft.
6
6
6
6
6
6
6
6
Number of
Heaters
Combined Input
in Thousands of Btu/hr
360,000
Manifold & Common Vent Diameter (Inches)
7
7
6
7
7
7
6
7
7
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
2
380,000
398,000
540,000
7
6
6
6
6
6
6
6
3
4
570,000
7
6
6
6
6
6
6
6
597,000
720,000
6
6
7
6
6
6
6
6
6
6
6
6
6
6
6
6
760,000
796,000
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
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SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
MODEL SBN 100-250NE
Input: 250,000 Btu/hr
TECHNICAL DATAVENTING (Continued)
Total Vent Height (Feet)
Vent Connector Size: 6 inches
6
8
10
15
20 30 50 100
Input Btuh/hr
250,000
Rise
1 Ft
2 Ft
3 Ft
Vent Connector Diameter (Inches)
8
7
7
8
7
7
7
7
7
7
7
7
7
6
6
6
6
6
6
6
6
6
6
6
250,000
250,000
Number
of Heaters
2
Combined Input
in Thousands of Btu/hr
500,000
Manifold and Common Vent Diameter (Inches)
9
9
9
8
10
12
8
10
10 10
7
9
7
8
9
7
8
9
3
750,000
12 12 10
14 14 12
4
1,000,000
MODEL SBN 100-275NE
Input: 275,000 Btu/hr
Vent Connector Size: 6 inches
Total Vent Height (Feet)
10 15 20 30 50 100
Vent Connector Diameter (Inches)
6
8
Input Btu/hr
275,000
275,000
Rise
1 Ft
2 Ft.
3 Ft
8
8
7
8
8
7
7
7
7
7
7
7
6
6
6
6
6
6
6
6
6
6
6
6
275,000
Number of
Heaters
2
Combined Input
in Thousands of Btu/hr
550,000
Manifold and Common Vent Diameter (Inches)
10
9
9
8
10
12
8
9
8
9
7
8
9
7
8
9
3
825,000
12 12 12
14 14 14
4
1,100,000
12 10
MODEL SBN 85-310
Input: 310,000 Btu/hr
Vent Connector Size: 6 inches
Total Vent Height (Feet)
10 15 20 30 50 100
Vent Connector Diameter (Inches)
6
8
Input Btu/hr
310,000
310,000
Rise
1 Ft.
2 Ft.
3 Ft.
9
8
8
8
8
8
8
8
8
8
7
7
7
7
7
7
7
7
6
6
6
6
6
6
310,000
Number of
Heaters
2
3
4
Combined Input
in Thousands of Btu/hr
620,000
Manifold & Common Vent Diameter
10 10
14 12 12
14 14 14
9
9
12
12
8
10
8
9
7
9
7
8
9
930,000
1,240,000
12 12 10
MODEL SBN 85-366NE, SBN 85-390NE
Input: 366,000, 399,000 Btu/hr
Vent Connector Size: 6 inches
Total Vent Height (Feet)
10 15 20 30 50 100
Vent Connector Diameter (Inches)
6
8
Input Btu/hr
366,000
399,000
366,000
399,000
Rise
1 Ft
1 Ft
2 Ft
2 Ft
3 Ft
3 Ft
9
10
9
9
9
9
9
8
9
9
9
8
9
8
8
8
9
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
9
9
9
366,000
399,000
Number of
Heaters
2
Combined Input
in Thousands of Btu/hr
732,000
Manifold & Common Vent Diameter (Inches)
12 10 10
12 12 10
14 14 14
14 14 14
16 16 14
16 16 16
9
9
9
9
9
8
8
9
8
8
9
9
798,000
1,098,000
1,197,000
1,464,000
10
12
12
14
14
3
4
12 10
12 10 10
14 12 12 10
14 12 12 10
1,596,000
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SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
SBN SEQUENCE OF OPERATION
Sequence
1.Thermistors (probes) call for
heat.
2. Inducer fan starts and
provides draft.
3. Hot surface igniter = 20 sec.
warmup.
4. Main gas valve opens 4 sec.
trial for ignition. (Maximum 5
trials.)
5. Main burner ignites and
proves.
6.Thermistors reach the
temperature setting.
7. Main burners “OFF”
- Auto restart after 60 min.
- 20 sec blower “interpurge”
between trials
Top View
Draft Proving (Pressure) Switch Table
Pressure Setting To
Close Switch (Inches
SBN Models
Part No.
194411-0
194411-1
194411-2
194411-3
W.C.)
366
275
310
(-) 1.60 .10"
(-) 2.00" .10"
(-) 1,75" .10"
(-) 2.40" .10"
120, 199, 250,
400
154, 180, 199
194411-4
(-) 2.60" .10"
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SBN TANK TYPE COMMERCIAL GAS WATER HEATER
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FRONTVIEW OFWATER HEATER
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SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
WHITE ROGERS INTEGRATEDWATER HEATER CONTROL
(PART NO. 194393-0) - ALSO CALLED“THERMOSAT”
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SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
HSI INTEGRATED IGNITION CONTROL BOARD
(PART NO. 194392)
E4
E1
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SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
LOWER FRONT VIEW OF SBN WATER HEATER
Notice that rods cross
main burner flame
.1 - .25”
HSI
Part Number
Volts AC
Ohms Resistance
194405
Nominal 80 VAC
11.0 - 20.0 @ 77° F (25° C)
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SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
WIRING DIAGRAM
R
B
Upper
ECO
{ R }
B
Propane (series) models do not have a low gas presure switch.
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SBN TANK TYPE COMMERCIAL GAS WATER HEATER
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ELECTRICAL SEQUENCE OF SBNWATER HEATER OPERATION
120 VAC
Power to Heater
Green LED - On
Call for Heat
Green LED - On
Module Self Check
Low Gas Pressure
Switch is Closed
Draft Proving Switch
Is Open
High Limit is Closed
Inducer On
Blower Prover
Closes -1.6 to -2.60 ± .10 W.C. depending on heater model
Ignition Control Board –
120 VAC
HSI Warm Up
Variable Voltage
20 seconds
(80-120 VAC)
Gas Valve Open
3 Second Trial
HSI - Off
3 Seconds to Prove
Flame After HSI - Off
Minimum Millivolt for
4.25 seconds
Flame Proves
No
Yes
Yes
No
20 Second Blower Purge
Tank Heated to Set Temperature
Flash 7 Times
1 Hour Auto Reset
2 More Trials
To Prove Flame
Gas Valve – Off
Call for Heat LED - Off
Yes
No
60 Second Blower Post Purge
Blower Prover - Opens
Standby LED - On
Flash 8 Times On Diagnostic LED
Lock Out for 1 Hour
Then Retry
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SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
PRE-SERVICE CHECKLIST
Use the following checklist BEFORE you begin servicing the water heater.
1. Have you removed the cover from the controls?
____________________________________________________
Did you take notice of the status lights on the upper water
heater control?
Yes / No
Yes / No
____________________________________________________
Did you take notice of the red LED in the upper left corner of
the lower ignition control?
Yes / No
____________________________________________________
2. Did you note conditions of the room?
____________________________________________________
Where does the supply air come from?
____________________________________________________
Is the room clean?
____________________________________________________
What is stored with the heater?
____________________________________________________
How is the heater vented?
____________________________________________________
Are all water and gas shut-off valves open?
____________________________________________________
Are there room exhaust or air intake fans?
____________________________________________________
3. Did you note the condition of the water heater?
____________________________________________________
Is the ON/OFF switch“On”?
Yes / No
Yes / No
Yes / No
Yes / No
Yes / No
Yes / No
Yes / No
Yes / No
Yes / No
____________________________________________________
What is the temperature of the stored water? (Test atT&P valve
or nearby faucet.)
____________________________________________________
Is the thermal expansion tank installed?
____________________________________________________
4. Did you write down the complete model and serial numbers of
the water heater? If so, what are they?
Yes / No
Yes / No
____________________________________________________
5. Does the water heater have a good ground wire connection? If
not, the inducer will typically come on for a short time (3-5
seconds), then go off, and the red LED will flash 8 times.
Yes / No
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SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
CONTROL BOARD DIAGNOSTIC LED INTERPRETATION AND
TROUBLESHOOTING
TEST 1 - 120 VAC CHECK TO WATER HEATER
Conditions:
ƒ No Green display “Power” LED on.
ƒ Plugs are in receptacles.
ƒ Supply power breaker is not “open”
ƒ On/Off heater switch is “On”.
Water Heater
Control
Ignition Control
Board
120 Vac Check To Water Heater On Switch
TEST 1
ŒCheck for 115-125 VAC black wire to ground
Œ115 V check to E13 terminal and 2B receptical.
If…
voltage
...then
Œ
from on/off switch-
check conditions above
is not present
center black wire to ground
power from center on/off
Œ
check wiring from switch to break box
check power from on/off to ignition board term
E13.
is present
terminal
Œ
check wiring from on/off. Left-outside terminal
voltage
at E13 to ground
to E13.
is not present
Œ
replace on/off switch.
check power from E14 to heater control E2
receptacle
power
at E13
is present
Œ
check wiring from ignition control board E14 to
voltage
from heater control
is not present
heater control receptacle E2.
Œ
receptacle E2 black to ground
replace ignition control board.
power is
at E2
green LED should be on.
present
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SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
FLASH CODES OF DIAGNOSTIC INDICATOR
Conditions:
ƒ Power On
ƒ Red, heater control “Call for Heat” LED – on
ƒ Red, ignition control board diagnostic LED – Flashing
ƒ Note LED Flash Code before resetting heater.
LED Status
Indication
1 Flash
System is in lock out.
2 Flashes
Draft proving (pressure) switch failed to open within 5 seconds at the end of the last cycle.
3 Flashes
Draft proving (pressure) switch failed to close ( -2.1 inches of water column pressure) within 5
seconds after the inducer was started.
The low gas pressure switch )closes at 5.2" .04" w.c.) may have remained open.
4 Flashes
6 Flashes
7 Flashes
8 Flashes
Open on high temperature limit switch (ECO).
115-volt supply power connection is indicating reversed polarity.
Flame sensor reads a low flame signal for more than 4.25 sec.
No ignition sensed.
Continuous Flash Continuous flame sensed for more than 5 seconds without gas valve being energized.
Continuous ON Internal control board failure.
*Control system self adjusts to use a minimum voltage for ignition. Lower voltage results in lower igniter temperature
which results in longer igniter life. Igniter voltage may vary from Nominal 80 VAC.
TEST 2 - POLARITY CHECK
Conditions:
Display
ƒ No hot water
ƒ Green “Power” LED is on.
ƒ Tank is more than 5° F
below temperature dial
setting.
ƒ Red ignition control board
diagnostic LED is flashing
6 times between pauses.
ƒ Red, diagnostic “Call for
Heat” LED-OFF.
LED’s
Continued on next page
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SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
TEST 2 - POLARITY CHECK - continued
Polarity Check
TEST 2
Check from on/off switch center and white wire terminals to ground
If…
...then
115-125 VAC
see Test 1.
is not present
white (right terminal) to
voltage
ground
ground
is present
black (center terminal) to
reverse supply wire connections - polarity is
reversed.
but not
TEST 3 - CONTINUITY CHECK
OF HIGH LIMIT (ECO)
Conditions:
ƒ Power On – No Hot Water
ƒ Red, heater control “Call for Heat”
LED – on
ƒ Red, ignition control board
diagnostic LED – 4 Flashing
ƒ Note LED Flash Code before
resetting heater.
ƒ See Description of diagnostic
LED Flashes.
ƒ Turn Power “Off”
Continued on next page
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SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
TEST 3 - CONTINUITY CHECK OF HIGH LIMIT (ECO)-CONTINUED
Continuity check of ECO (energy cut-off, high limit)
TEST 3
Black to Black wires of upper probe. Power is off.
If…
...then
opens at 203° F; closes at 193° F. If water is
continuity
is indicated
below 193° F, continuity is correct.
replace ECO sensor, if water temperature is
below 193° F.
continuity
is not present
•
reset status LED should be on.
•
water is less than 120° F
replace heater control if control will not manually
reset.
TEST 4 - UPPER TEMPERATURE PROBE CONTINUITY CHECK
Conditions:
ƒ Power On - Water below tempera-
ture set point.
ƒ Red, heater control “Reset Status”
LED-OFF
ƒ “Call For Heat” LED off.
Ohms Resistance Table
° F
70°
120°
140°
180°
Ohms
11,884
3,759
2,488
1,169
Upper Temperature probe continuity check
Red wire to red wire - Turn supply power "Off" for this test
...then
TEST 4
If…
test indicates
replace probe.
no continuity
probe should be okay (also verify Ohms
resistance for water temperature). (Reading will
be approximate.)
continuity
is indicated
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SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
Water Heater
TEST 5 - CALLING FOR HEAT – NO
Control
INDUCER OPERATION
Display
LED’s
Conditions:
ƒ Power on
ƒ Plugs in Receptacles
ƒ Red “ Call for Heat” LED-ON
ƒ Inducer “Off”
Note flash code on ignition control board
diagnostic LED
Diagnostic
LED
Ignition Control Board
E4
115-120 V Check to Inducer
TEST 5
Test on Ignition Board 4 Pin Receptacle E4
...then
If…
pin 1 to ground check
•
reset control by interrupting power - note
possible reasons for this from flashing LED code
has no voltage
•
replace igntion board
pin 1 to ground
pin 3 to ground
proceed
has voltage
has no voltage
•
check wiring harness and plugs
•
replace inducer
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SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
TEST 6 - INDUCER ON-NO IGNITION
Conditions:
ƒ Power on
ƒ Plugs in receptacles
ƒ Inducer operating
ƒ No power to Hot Surface Igniter (HSI)
ƒ Note flash code of LED
Draft Exhaust
Exhaust
Outlet
Draft Proving Pressure
Switch
Inducer
Optional Hot
Water Outlet
Low Gas
Pressure
Switch
24 VAC Check of Blower Prover/Low Gas Pressure Circuit
TEST 6
If…
...then
igntion board receptacles E1, Pin 7 to ground
no voltage
show s
replace Ignition board
E1, Pin 7
to ground
check wire connection to and from inducer
has 24 Volt
voltage check of each blower switch terminal to
ground to only 1 terminal
switch is open - check for proper draft (should
•
also see LED 3 flash code)
check for blocked exhaust
show s voltage
•
check that blower outlet exhaust damper is open
•
replace blower (draft) proving switch
•
check wiring from blower switch to low gas
pressure switch
•
24V
from each switch terminal to ground.
is present
voltage check to each terminal of low gas pressure
switch is open - test for a minimum of 5.2 ± "
•
switch and ground
terminal
W.C. Natural Gas or 10.5" Propane, flowing
supply gas pressure (should also see 3 Flash
LED code)
shows only voltage on 1
replace low gas pressure switch
•
voltage
and ground
to each pressure switch terminal check wiring from low gas pressure switch to
ignition board recetacles E1, Pin 10
is present
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SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
TEST 7 - INDUCER ON – PROVER SWITCH AND LOW GAS SWITCH
CLOSED – NO IGNITER OPERATION
Conditions:
Check E4 pin 4 to Ground
ƒ Power on
ƒ Plugs in receptacles
ƒ Inducer on
ƒ 24V at ignition board
E1, Pin 10
ƒ No Power to igniter
Note: Flash code of LED
Check E4 pin 2 to Ground
Check E1 pin 10
24V
ContinuityTest
E4 Plug
Voltage check and continuity check of hot surface igniter circuit
ŒContinuity check - Power off- Plug removed from E4 receptacles
ŒNominal 80 VAC check - Plug in E4- Power "On"
TEST 7
If…
continuity
...then
Œ
check wiring and connection from E4 plug to
between E4
is not indicated
plug pin 2 to 4.
HSI receiving plug
Œ
Œ
replace HSI Assembly
resistance should be between 11 and 20 Ohms
continuity
is present
at a temperature of 77°F
between E4, Pin 2
between E4, Pin 4
voltage is not present
to ground
Œ
replace ignition board
Œ
Œ
Œ
Œ
Œ
voltage
voltage
continue
is present
is not present
check wiring and plug connections to HSI
replace HSI
note igntion board, Flash code LED
HSI should work
to ground
voltage
is present
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SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
TEST 8 - IGNITER HEATS – NO MAIN BURNER
Conditions:
ƒ Plugs in receptacle
ƒ Igniter energizes (gets red)
ƒ No main burner or main shuts off within 5 seconds.
Note flash code of LED.
Pin 12
Pin 9
24
24
E1 Plug, Pin 9
E1 Plug, Pin 12
Plug in Receptacle
Plug in Receptacle
Test of Igniter and gas valve circuit
TEST 8
If…
short heat up time of igniter
...then
•
check control box grounding
check for 24V from E1, Pin 12 to ground during 4
•
normal (Approximate 20 seconds) second trial.
warm up - no ignition
- Yes - Continue
- No - Replace Igntion Board
E4, Pin 12 to
no voltage present
ground
replace ignition board
•
24 Volt
from E1, Pin check that air has been purged from gas circuit
was present
•
12 to ground, but no main burner
check that wiring and connections to gas valve and
E1, Pin 9 are correct
•
check for 24 VAC at E1, Pin 9 to ground during 4
second trial
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SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
TEST 9 - IGNITER HEATS – NO MAIN BURNER
Conditions:
ƒ Test 8 completed then:
ƒ Turn off power
ƒ Disconnect wires from gas valves
Continuity Check Of Gas Valve Coil
TEST 9
If…
...then
Œ
check meter scale setting to read between 550
meter reads 0 or 1
and 650 Ohms
Œ
Œ
Œ
replace Gas Valve
valve should be okay
still no gas to main burner, then coil may be
meter indicates pilot and main coil
continuity
have
stuck - Replace Valve
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SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
TEST 10 - MAIN BURNER IGNITION FOR LESS THAN 5 SECONDS
Conditions:
ƒ Power On – plug connected
ƒ Main Burner ignites for approximately 5 seconds then goes out.
ƒ Tests 8 and 9 completed
ƒ Note flash code on ignition board LED.
Hot Surface Igniter
Pin 2
Main Burner
E1, Pin 2 - From Flame Proving Rod
(Illustration of low NOx burner)
Flame Prover Circuit Check
TEST 10
If…
...then
main burner igntion
no extended
Œ
check wiring and plug connections of HSI assembly
plug and ignition board receptacles E1, Pin 2
Œ
Œ
Œ
check that HSI assembly is not cracked or dirty
check that flame prover will be in main flame
replace HSI assembly
main burner ignition
replace ignition control board
still no extended
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SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
TEST 11 - WATER HEATER SHUTTING OFF BELOW SETTING
Conditions:
ƒ Main burner ignited
ƒ Stored water is below temperature setting more than 5° F (Tank Average).
ƒ Power off
ƒ Plug disconnected from heater control board receptacle E3 and E4
Red
Red
Black
Water Temperature Circuit Check - Continuity
TEST 11
If…
...then
Œ
continuity check pin to pin of lower
temperature probe shows 1 or 0 (E4)
see Test 4
Œ
check wiring and plug connections to heater
control board receptacle E4
Œ
Œ
Œ
replace lower temperature probe
see Test 4
check wiring and plug connections to heater
continuity check red wire pin to red wire pin
on upper temperature sensor shows 1 or 0
(E3)
control board receptacle
Œ
replace upper temperature probe
all above checks are okay
replace the water heater control.
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SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
DISPLAY LIGHTS ON INTEGRATED HEATER CONTROL
Red
Green
Red
Red
LED Status
Indication
Calling for heat
Action to be Taken
Normal status –
none
The ECO (Energy Cut •Check for
Off) has opened.
excessively hot
water (203° F or
higher).
•Correct the
problem
No power
Check the breaker.
Tank is at a set
temperature of ± 2° F.
Tank has cooled
below 120° F
•Push the manual
reset button.
Preceded by “ECO
Open” indication
•Troubleshoot for
“why” the ECO
opened
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SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
LED INDICATORS ON HOT SURFACE IGNITION (HSI)
USING FLASHING RED LED ON HSI (HOT SURFACE IGNITION)
LED STATUS
1 Flash
INDICATION
ACTION TO BE TAKEN
System is in lockout.
Interrupt power to
reset. Heater had not
sensed the flame –
check gas supply and
igniter condition.
2 Flashes
Draft proving
Test for defective
switch or a
pressurized room
condition that may be
forcing air through the
inducer.
(pressure) switch
(closes at -2.10 +0.01
inches W.C. negative
pressure) failed to
open within 5 seconds
at the end of the last
cycle.
3 Flashes
Draft proving
Check the draft.
(pressure) switch
failed to close
within 5 seconds after
the inducer was
started.
The low gas pressure
switch closes at 5.2 inches W.C.
may have remained open.
Verify the supply gas pressure
while the gas is flowing.
Check temperature
control operation.
4 Flashes
6 Flashes
Open on high
temperature
limit switch
(ECO)
Verify that a neutral-to-ground
check results
in “0” volts and a hot-to-
ground check
115-volt supply power
connection is
indicating reversed
polarity.
results in 115-125 VAC.
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SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
LED INDICATORS ON HOT SURFACE IGNITION (HSI)
USING FLASHING RED LED ON HSI (HOT SURFACE IGNITION)
LED STATUS
INDICATION
ACTIONTO BETAKEN
7 Flashes
Flame sensor reads a
low flame signal for
more than 4.25 sec.
Verify that the main
burner flame is in contact
with the flame.
Check wiring and
connection to HSI
assembly.
Clean the flame sensor
rod of soot or metal
flakes.
8 Flashes
No ignition sensed
Check igniter for lack of
voltage, cracks, or lose
connection. [11-20 Ohms
at 77° F (25° C) is “good”]
Check ground
connection.
Continuous
Flash
Continuous flame
Check that the gas valve
is not failing to close at
the end of a heating
cycle.
sensed for more than 5
seconds without gas
valve being energized
Continuous
ON
Internal control board
failure.
Replace ignition control
board.
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SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
PART LOCATIONS ON SBN SERIES 120,000 - 390,000 BTU/H INPUT
MODELS 120 THROUGH 400/A
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SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
120
154
180
199
200(A)
Blower Assembly:
3
4
6
7
8
Blower .................................................194408 ......... 194408.......... 194408 ..........194408 ......... 194408
Outlet Assembly, Exhaust....................194424 ......... 194424.......... 194424 ..........194424 ......... 194424
Burner, Orifice Bracket, Main ................ 98044 ........... 98044............ 98044 ............98044 ........... 98044
Burner, Orifice, Main (N) SBN............ 76243-32 ..... 76243-30 .......76243-33....... 76243-32 ..... 76243-32
Burner Assembly, Main (N) SBN .........194648 ......... 194648.......... 194648 ..........194648 ......... 194648
Burner w/Igniter Bracket, Main BTN ....194760 ......... 194760.......... 194760 ..........194760 ......... 194760
Gasket, Cleanout ................................. 99038 ........... 99038............ 99038 ............99038 ........... 99038
Control, Ignition Assembly ..................194392 ......... 194392.......... 194392 ..........194392 ......... 194392
Cover, Control Box...............................194395 ......... 194395.......... 194395 ..........194395 ......... 194395
Cover, Inner ....................................... 194388-4 ..... 194388-4 .......194388-4.........194388 ......... 194388
Cover, Jacket .......................................194389 ......... 194389.......... 194389 ..........194389 ......... 194389
Ignitor, Flame Sensor..........................194405 ......... 194405.......... 194405 ..........194405 ......... 194405
Insulation, Top .....................................194439 ......... 194439.......... 194439 ..........194439 ......... 194439
Manual, Instruction-SBN .....................194403 ......... 194403.......... 194403 ..........194403 ......... 194403
Plate, Mounting ...................................193439 ......... 193439.......... 193439 ..........193439 ......... 193439
Probe/ECO, Upper Thermostat ..........194396 ......... 194396.......... 194396 ..........194396 ......... 194396
Probe/Lower Thermostat ....................194397 ......... 194397.......... 194397 ..........194397 ......... 194397
Rod, Anode ...................................... 180618-42 ... 180618-42 .....180618-42..... 180618-42 ... 180618-42
Switch, Blower Prover ....................... 194411-3 ......194411-7 ....... 194411-4 ....... 194411-3 ....... 194411
Switch, Low Gas Pressure ............... 191149-5 ......191149-5 ....... 191149-5 ....... 191149-5 ......191149-5
Switch, Off/On ......................................193243 ......... 193243.......... 193243 ..........193243 ......... 193243
Thermostat, Digital .............................194393 ......... 194393.......... 194393 ..........194393 ......... 194393
Tube, Inlet.......................................... 192626-1 ..... 192626-1 .......192626-1....... 192626-1 ..... 192626-1
Tube, Outlet ....................................... 192627-1 ..... 192627-1 .......192627-1....... 192627-1 ..... 192627-1
Valve, Gas - Natural SBN .................. 194536-1 ..... 194536-1 ........ 194536 ..........194536 ......... 194536
BTI Valve, Gas - Propane .................. 194536-3 ..... 194536-3 .......194536-3....... 194536-3 ..... 194536-3
Valve, T&P............................................192467 ......... 192467.......... 192467 ..........192467 ......... 192467
Wire Harness - Control Nat. Gas........194545 ......... 194545.......... 194545 ..........194545 ......... 194545
Wire Harness - Power ........................194398 ......... 194398.......... 194398 ..........194398 ......... 194398
9
11
14
17
18
19
22
23
*39
40
41
42
43
44
45
46
47
48
49
51
52
*53
*54
*Items not illustrated.
Part numbers underlined are recommended stock items for emergency replacement (consider gas used in your area only).
Request from Parts Department by giving all information such as model and series number, type of gas and specifications.
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SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
Item
250(A)
275(A)
310(A)
366(A)
400(A)
Blower Assembly:
3
4
6
7
8
9
Blower
....................................... 194408 ........ 194408 ......... 194408 ........ 194408 ....... 194408
Outlet Assembly, Exhaust.................. 194424 ........ 194424 ......... 194424 ........ 194424 ....... 194424
Burner, Orifice Bracket, Main .............. 98044 .......... 98044 ........... 98044 .......... 98044 ......... 98044
Burner Orifice, Main (N) SBN .......... 76243-30 .....76243-33...... 76243-31 .....76243-30 .... 76243-29
Burner Assembly, Main SBN ............. 194648 ........ 194648 ......... 194648 ........ 194648 ....... 194648
Burner w/Igniter Bracket, Main SBN .. 194383 ........ 194383 ......... 194383 ........ 194383 ....... 194383
11
14
17
18
19
*22
23
*39
40
41
42
43
44
45
46
47
48
51
52
*53
Gasket, Cleanout ............................... 99038 .......... 99038 ........... 99038 .......... 99038 ......... 99038
Control, Ignition Assembly ................ 194392 ........ 194392 ......... 194392 ........ 194392 ....... 194392
Cover, Control Box............................. 194395 ........ 194395 ......... 194395 ........ 194395 ....... 194395
Cover, Inner SBN ............................ 194388-4 .....194388-4...... 194388-4 ...... 194388 ....... 194388
Cover, Jacket ..................................... 194389 ........ 194389 ......... 194389 ........ 194389 ....... 194389
Igniter, Flame Sensor........................ 194405 ........ 194405 ......... 194405 ........ 194405 ....... 194405
Insulation, Top ................................... 194439 ........ 194439 ......... 194439 ........ 194439 ....... 194439
Manual, Instruction SBN ................... 194403 ........ 194403 ......... 194403 ........ 194403 ....... 194403
Plate, Mounting ................................. 193243 ........ 193243 ......... 193243 ........ 193243 ....... 193243
Probe/ECO, Upper Thermostat ........ 194396 ........ 194396 ......... 194396 ........ 194396 ....... 194396
Probe/Lower Thermostat .................. 194397 ........ 194397 ......... 194397 ........ 194397 ....... 194397
Rod, Anode .................................... 180618-42 ...180618-42.... 180618-42 ...180618-42 .. 180618-42
Switch, Blower Prover SBN ............. 194411-3 ..... 194411-8 ...... 194411-2 ...... 194411....... 19441-3
Switch, Low Gas Pressure ............. 191149-5 ..... 191149-5 ...... 191149-5 ..... 191149-5 .... 191149-5
Switch, Off/On .................................... 193243 ........ 193243 ......... 193243 ........ 193243 ....... 193243
Thermostat, Digital ........................... 194393 ........ 194393 ......... 194393 ........ 194393 ....... 194393
Tube, Inlet ..................................... 192626-1 .....192626-1...... 192626-1 .....192626-1 .... 192626-1
Valve Gas - Natural SBN ................. 194536-1 .....194536-1........ 194536 ........ 194536 ....... 194536
Valve, T&P ....................................... 192467 ........ 192467 ......... 192467 ........ 192467 ....... 192467
Wire Harness - Control Natural ........ 194545 ........ 194545 ......... 194545 ........ 194545 ....... 194545
Wire Harness - Control Propane ...... 194399 ........ 194399 ......... 194399 ........ 194399 ....... 194399
Wire Harness - Power ...................... 194398 ........ 194398 ......... 194398 ........ 194398 ....... 194398
*54
*Items not illustrated.
Part numbers underlined are recommended stock items for emergency replacement.
Request from Parts Department by giving all information
High Altitude Main Burner Orifice
Table (NEO)
such as model and series number, type of gas and specifications.
Model
120
154
180
250
275
310
366
390
Orifice Drill Size
37
42
37
32
38
36
32
31
©2003
Technical Training Department
42
Ashland City, Tennessee
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SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
GENERAL QUESTIONS AND ANSWERS
Q:What is the effect of the draft inducer?
A:The draft inducer has several effects:
• minimizes the excess air through the heater—this often reduces the required
vent size
• reduces draft through the heater when it is off
• replaces the draft hood of comparable products
• does not pressurize the vent—common “B” vent materials and the familiar fuel
gas codes for venting Category I, fan-assisted, products still apply. Do not
combine vent with products that do create a positive pressure vent (Category III
or IV).
SBN
Induced
Draft
BTR
Atmospheric Vent Dia.
Model
120
154-390
Vent
5
6
Mocels
120
154-275
305-390
(inches)
5
6
8
Q:What is the significance of low NOx (nitrogen oxide)? (SBN Models)
A: Currently, only Southern California and Texas have adopted rules to reduce the NOx
emissions under Rules 1121 and 1146.2, but more of California and Texas are expected
to implement this requirement in 2001. Ground-level ozone from man-made pollution is
a major ingredient in smog. NOx is a contributor to this ground-level ozone formation.
The boilers and water heaters affected by Rule 1121 and 1146.2 release about 14 tons
of NOx emissions into the air each day. By comparison, approximately the same quantity
of NOx is emitted by 288,000 typical passenger vehicles daily. It is estimated that a full
implementation of this emissions rule will reduce NOx by about 11 tons daily.
These emission requirements are expected to be implemented by other cities and
states soon.The rules apply to natural gas water heaters and boilers.
Technical Training Department
Ashland City, Tennessee
©2003
43
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SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
Q:When should anode rods, which provide additional protection against
corrosion, be replaced?
A: Anode rods should be replaced when large gouges or pits appear in the anodes. It
is recommended that anodes be inspected every six months.
Q: Does the inducer motor require oiling?
A:No.
Q:What size breaker should be used?
A:The heater should draw less then 5 amps and there is a 3-amp car-type fuse on the
control board.This fuse protects the boards.
©2003
Technical Training Department
44
Ashland City, Tennessee
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SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
Electrical Information
Part Name
Integrated Water
Heater Control
Number
194393-0
Voltage
XFMER Secondary 24 V
Field Output 24 V
Amperes
1.5
11.5
(Temperature Control
Board)
Inducer (Blower)
ECO (Part of Upper
Temperature Sensor)
Main Gas Valve
Inducer (Blower)
194408-0
194396
194408
194405
120 VAC
24 V - Opens at 203° ±
5.4°F Closes ± 193° F
24 VAC
1.7
0.3
1.5
2.2 FLA
3.5 LRA
2
120 VAC
Igniter
OPT Power Venter
120 VAC
120 VAC
14.5 FLA
26.0 LRA
Draft Proving (Pressure) Switch Table
Pressure Setting To
Close Switch (Inches
W.C.)
SBN Models
Part No.
194411-0
194411-1
194411-2
194411-3
366
275
310
(-) 1.60 .10"
(-) 2.00" .10"
(-) 1.75" .10"
(-) 2.40" .10"
120, 200, 250, 390
154, 180, 199
-
194411-4
194411-5
(-) 2.60" .10"
(-) 2.50" .10"
Technical Training Department
Ashland City, Tennessee
©2003
45
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For Additional Information
Contact
State Water Heater Technical Information
At
1-800-365-0577
Prepared By The Training Department
In Ashland City, Tennessee
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