State Industries SBD30 199, SERIES 108, SBN85 390-A, SBN71 120, SBD30 150 User Manual
SERVICE HANDBOOK
SandBlaster
Self-Cleaning Induced Draft Multi Flue
Commercial Gas Water Heaters
®
MODE L S COVERE D
SBN71 120 Through SBN85 390 (A)
Series 108 Models and
SBD30 150, SBD30 199
Booster Heaters
SBN Meets Low NOx Requirements of SCAQMD
Rules 1121 & 1146.2
Part Number 317927-000
Printed in the U.S.A. - 0810
COMMERCIAL
SBN71-120 thru 85-390, SBD30-150/199 TANK TYPE COMMERCIAL
GAS WATER HEATER SERVICE HANDBOOK
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Table of Contents
SBN 71-120 thru 85-390, SBD30-150/199 SERVICE HANDBOOK INTRODUCTION.........2
QUALIFICATIONS..................................................................................................................3
TOOLS REQUIRED...............................................................................................................3
COMMERCIAL TANK TYPE GAS MODEL NUMBER BREAK DOWN..................................3
INSTALLATION CONSIDERATIONS - CLEARANCES.........................................................4
TOP AND FRONT VIEWS OF MINIMUM CLEARANCES TO COMBUSTIBLES..................4
MINIMUM CLEARANCE TO COMBUSTIBLES.....................................................................5
REQUIRED EXTERIOR CLEARANCES................................................................................6
REQUIRED EXTERIOR CLEARANCES................................................................................7
INSUFFICIENT MAKEUP AIR ........ NEGATIVE AIR PRESSURE .....DOWNDRAFTS........7
MAKE-UP AIR – DIRECT COMMUNICATION WITH OUTDOORS.......................................8
CONTAMINATED AIR............................................................................................................9
AIR FOR
COMBUSTION – FLAMMABLE ITEMS..................................................................9
GAS VALVE.........................................................................................................................10
GAS VALVE.........................................................................................................................11
VENTING.............................................................................................................................12
VENTING – MULTIPLE CATEGORY I GAS WATER HEATERS.........................................12
VENT TABLES FOR CATEGORY I - TYPE B GAS VENT..................................................13
VENT TABLES FOR CATEGORY I - TYPE B GAS VENT..................................................14
VENT TABLES FOR CATEGORY I - TYPE B GAS VENT..................................................15
VENT TABLES FOR CATEGORY I - TYPE B GAS VENT..................................................16
VENT TABLES FOR CATEGORY I - TYPE B GAS VENT..................................................17
SBN /SBD30-150/199 SEQUENCE OF OPERATION.........................................................18
COMBINED VENTING.........................................................................................................19
9 RULES FOR GOOD VENTING.........................................................................................
20
9 RULES FOR GOOD VENTING.........................................................................................21
9 RULES FOR GOOD VENTING.........................................................................................22
DRAFT PROVING PRESSURE SWITCH - SETTINGS.......................................................23
THERMOSTAT AND IGNITION CONTROL BOARD VIEW.................................................24
WHITE RODGERS INTEGRATED CONTROL - THERMOSTAT........................................25
WHITE RODGERS IGNITION CONTROL BOARD..............................................................26
GAS CONTROL VALVE / BURNER AREA VIEW................................................................27
WIRING DIAGRAM..............................................................................................................28
ELECTRICAL SEQUENCE – SBN, SBD30-150/199...........................................................29
OPERATING SEQUENCE – FLOW CHART........................................................................30
DIAGNOSTIC SEQUENCE OF OPERATION – FLOW CHART..........................................31
PRE-SERVICE CHECK LIST...............................................................................................32
TEST 1 – 120VAC POWER
CHECK ...................................................................................33
SBN71-120 thru 85-390, SBD30-150/199 TANK TYPE COMMERCIAL
GAS WATER HEATER SERVICE HANDBOOK
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This service handbook is a supplement to the SBN and SBD151/201 Installation and
Operation Manual. The handbook provides information on servicing and troubleshooting State
SBN/SBD30-150/199/ 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 Technical Information
Department at 1-800-365-0024 or your local State Water
Heater representative for further
assistance. No duplication or reproduction of this book may be made without the expressed
written authorization of the State Water Heaters.
SBN 71-120 thru 85-390, SBD30-150/199 SERVICE HANDBOOK INTRODUCTION
WATER HEATER CONTROL BOARD TROUBLESHOOTING AND DIAGNOSTIC LED
INTERPRETATION.............................................................................................................................33
WATER HEATER CONTROL BOARD TROUBLESHOOTING AND DIAGNOSTIC LED
INTERPRETATION.............................................................................................................................34
TEST 2 – POLARITY CHECK.............................................................................................................35
TEST 3 - CONTINUITY CHECK OF HIGH LIMIT (ECO)....................................................................36
TEST 4 - UPPER TEMPERATURE PROBE CONTINUITY CHECK..................................................37
TEST 5 - CALLING FOR HEAT – NO INDUCER OPERATION.........................................................38
TEST 6 - INDUCER ON.............NO IGNITION..................................................................................39
TEST 7 – INDUCER ON, PROVER SWITCH AND LOW GAS PRESSURE SWITCH CLOSED
....................NO IGNITER OPERATION.............................................................................................40
TEST 8 – IGNITER HEATS .............. NO MAIN BURNER.................................................................41
TEST 9 – IG
NITER HEATS .......NO MAIN BURNER.........................................................................42
TEST 10 - MAIN BURNER IGNITION FOR LESS THAN 5 SECONDS.............................................43
TEST 11 - WATER HEATER SHUTTING OFF BELOW SETTING....................................................44
DISPLAY LIGHTS ON INTEGRATED WATER HEATER CONTROL................................................45
PARTS SBN71-120 thru 85-390 series 100.......................................................................................46
PARTS SBN71-120 thru 85-390 series 100.......................................................................................47
PARTS SBN71-120 thru 85-390 series 100.......................................................................................48
PARTS SBN71-120 thru 85-390 series 108.......................................................................................49
PARTS SBN71-120 thru 85-390 series 108.......................................................................................50
PARTS SBN71-120 thru 85-390 series 108.......................................................................................51
PARTS SBD30-150/199NE.................................................................................................................52
PARTS SBD30-150/199NE.................................................................................................................53
SBN71-120 thru 85-390, SBD30-150/199 TANK TYPE COMMERCIAL
GAS WATER HEATER SERVICE HANDBOOK
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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
• water pressure gauge
• thermometer (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
Rev. 1 Adds SBD30-150 and 30-199 models with parts lists. Adds SBN series 108 parts list.
COMMERCIAL TANK TYPE GAS MODEL NUMBER BREAK DOWN
SBN71-120 thru 85-390, SBD30-150/199 TANK TYPE COMMERCIAL
GAS WATER HEATER SERVICE HANDBOOK
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INSTALLATION CONSIDERATIONS - CLEARANCES
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 and SBD30-150/199 . The installation manual covers most
of these items in detail.
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
SBN71-120 thru 85-390, SBD30-150/199 TANK TYPE COMMERCIAL
GAS WATER HEATER SERVICE HANDBOOK
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MINIMUM CLEARANCE TO COMBUSTIBLES
Model Number "A" Right Side "B" Left Side "C" Back "D" Ceiling
SBN-120 thru
200A
2" 2" 2" 12"
SBN-250/A thru
310/A
3" 3" 3" 12"
SBN-366 6" 6" 6" 6"
SBN-390 4" 4" 4" 4"
SBD30-150/199 2” 2” 2” 12”
A, B, and C clearances to non-combustibles is “0” inches - a 12 inch clearance to cover remains
unchanged.
SBN71-120 thru 85-390, SBD30-150/199 TANK TYPE COMMERCIAL
GAS WATER HEATER SERVICE HANDBOOK
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REQUIRED EXTERIOR CLEARANCES
The illustration below shows the required clearances for venting units using natural draft
venting.
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 2006; ANSI Z 223.1 SEC 12.6.2 and Sec12.7.2 may allow reduction to
8 feet with a “listed vent cap.”
“
Copyright by the American Gas Association. Used by permission of the copyright holder”.
SBN71-120 thru 85-390, SBD30-150/199 TANK TYPE COMMERCIAL
GAS WATER HEATER SERVICE HANDBOOK
REQUIRED EXTERIOR CLEARANCES
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INSUFFICIENT MAKEUP AIR ........ NEGATIVE AIR PRESSURE .....DOWNDRAFTS
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 back drafted by
the restaurant exhaust equipment
through the heater causing the draft
proving switch to open and/or
erratic heater shutdown.
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
SBN71-120 thru 85-390, SBD30-150/199 TANK TYPE COMMERCIAL
GAS WATER HEATER SERVICE HANDBOOK
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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.(Not Direct Vent)
1 SQUARE INCH PER
4,000 Btu FOR EACH
OPENING
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 co
nfined 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.
MAKE-UP AIR – DIRECT COMMUNICATION WITH OUTDOORS
SBN71-120 thru 85-390, SBD30-150/199 TANK TYPE COMMERCIAL
GAS WATER HEATER SERVICE HANDBOOK
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Along with adequate make-up air, the quality of the air is important. 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.
CONTAMINATED AIR
AIR FOR COMBUSTION – FLAMMABLE ITEMS
SBN71-120 thru 85-390, SBD30-150/199 TANK TYPE COMMERCIAL
GAS WATER HEATER SERVICE HANDBOOK
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INLET VIEW
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. 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.
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 (silver cap for Natural Gas or black cap for Propane) 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.
TOP VIEW
GAS VALVE
SBN71-120 thru 85-390, SBD30-150/199 TANK TYPE COMMERCIAL
GAS WATER HEATER SERVICE HANDBOOK
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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.
OUTLET VIEW
GAS VALVE
SBN71-120 thru 85-390, SBD30-150/199 TANK TYPE COMMERCIAL
GAS WATER HEATER SERVICE HANDBOOK
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All SBN and SBD 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
VENTING – MULTIPLE CATEGORY I GAS WATER HEATERS
SBN71-120 thru 85-390, SBD30-150/199 TANK TYPE COMMERCIAL
GAS WATER HEATER SERVICE HANDBOOK
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Multiple Gas Fired Tank-Type Heaters
When venting multiple Category I tank type heaters using Type B vent pipe, follow the
installation tables below which give sizing and data based upon NFPA 54/ANSI Z223.1-2006.
Model: SBN 71-120
latoT.rh/utB 000,021:tupnI Vent Height (feet)
001050302510186”5 :eziS rotcennoC tneV
Input Btu/hr Rise Vent Connector Diameter (inches)
120,000 1' 6 6 5 5 5 5 5 5
120,000 2' 5 5 5 5 5 5 5 5
120,000 3' 5 5 5 5 5 5 5 5
No. of Units Combined Input (Btu/hr x 1,000) Combined Vent/Manifold Diameter
66666677000,0422
66677788000,0633
67788999000,0844
Model: SBN 154; SBD30-150
T.rh/utB 000,451/000,051:tupnI otal Vent Height (feet)
001050302510186”6 :eziS rotcennoC tneV
Input Btu/hr Rise Vent Connector Diameter (inches)
150,000/154,000 1' 6 6 6 6 6 6 6 6
150,000/154,000 2' 6 6 6 6 6 6 6 6
150,000/154,000 3' 6 6 6 6 6 6 6 6
No. of Units Combined Input (Btu/hr x 1,000) Combined Vent/Manifold Diameter
2 300,000/ 308,000 7 7 6 6 6 6 6 6
3 450,000/ 462,000 8 8 7 7 7 6 6 6
4 600,000/ 616,000 9 9 9 8 8 7 7 6
VENT TABLES FOR CATEGORY I - TYPE B GAS VENT
SBN71-120 thru 85-390, SBD30-150/199 TANK TYPE COMMERCIAL
GAS WATER HEATER SERVICE HANDBOOK
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Model: SBN80-180; SBN100-199; SBN100-200; SBD30-199
Input:180,000, 190,000 and 199,000 Btu/hr. Total Vent Height (feet)
001050302510186”6 :eziS rotcennoC tneV
Input Btu/hr Rise Vent Connector Diameter (inches)
180,000 1' 7 7 6 6 6 6 6 6
199,000/200,000 1' 7 7 7 6 6 6 6 6
180,000 2' 6 6 6 6 6 6 6 6
199,000/200,000 2' 7 7 6 6 6 6 6 6
180,000 3' 6 6 6 6 6 6 6 6
199,000/200,000 3' 6 6 6 6 6 6 6 6
No. of Units Combined Input (Btu/hr x 1,000) Combined Vent/Manifold Diameter
2
360,000
7 7 6 6 6 6 6 6
398,000/400,000
7 7 7 6 6 6 6 6
3
540,000
7 6 6 6 6 6 6 6
597,000/600,000
6 6 6 6 6 6 6 6
4
720,000
6 6 6 6 6 6 6 6
796,000/800,000
6 6 6 6 6 6 6 6
VENT TABLES FOR CATEGORY I - TYPE B GAS VENT
SBN71-120 thru 85-390, SBD30-150/199 TANK TYPE COMMERCIAL
GAS WATER HEATER SERVICE HANDBOOK
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Model: SBN100-275
latoT.rh/utB 000,572:tupnI Vent Height (feet)
001050302510186”6 :eziS rotcennoC tneV
Input Btu/hr Rise Vent Connector Diameter (inches)
275,000 1' 8 8 7 7 6 6 6 6
275,000 2' 8 8 7 7 6 6 6 6
275,000 3' 7 7 7 7 6 6 6 6
No. of Units Combined Input (Btu/hr x 1,000) Combined Vent/Manifold Diameter
2 550,000 10 9 9 8 8 8 7 7
3 825,000 12 12 12 10 9 9 8 8
4 1,100,000 14 14 14 12 12 10 9 9
VENT TABLES FOR CATEGORY I - TYPE B GAS VENT
Model: SBN100-250
latoT.rh/utB 000,052:tupnI Vent Height (feet)
001050302510186”6 :eziS rotcennoC tneV
Input Btu/hr Rise Vent Connector Diameter (inches)
250,000 1' 8 8 7 7 7 6 6 6
250,000 2' 7 7 7 7 6 6 6 6
250,000 3' 7 7 7 7 6 6 6 6
No. of Units Combined Input (Btu/hr x 1,000) Combined Vent/Manifold Diameter
2 500,000 9 9 9 8 8 7 7 7
3 750,000 12 12 10 10 10 9 8 8
4 1,000,000 14 14 12 12 10 10 9 9
SBN71-120 thru 85-390, SBD30-150/199 TANK TYPE COMMERCIAL
GAS WATER HEATER SERVICE HANDBOOK
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Model: SBN 85-310
latoT.rh/utB 000,013:tupnI Vent Height (feet)
001050302510186”6 :eziS rotcennoC tneV
Input Btu/hr Rise Vent Connector Diameter (inches)
310,000 1' 9 8 8 8 7 7 6 6
310,000 2' 8 8 8 7 7 7 6 6
310,000 3' 8 8 8 7 7 7 6 6
No. of Units Combined Input (Btu/hr x 1,000) Combined Vent/Manifold Diameter
2 620,000 10 10 9 9 8 8 7 7
3 930,000 14 12 12 12 10 9 9 8
4 1,240,000 14 14 14 12 12 12 10 9
VENT TABLES FOR CATEGORY I - TYPE B GAS VENT
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