SERVICE HANDBOOK
SandBlaster®
Self-Cleaning Induced Draft Multi Flue
Commercial Gas Water Heaters
SBN Meets Low NOx Requirements of SCAQMD
Rules 1121 & 1146.2
Part Number 317927-000 |
COMMERCIAL |
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Printed in the U.S.A. - 0810
SBN71-120 thru 85-390, SBD30-150/199 TANK TYPE COMMERCIAL GAS WATER HEATER SERVICE HANDBOOK
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Table of Contents |
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SBN 71-120 thru 85-390, SBD30-150/199 SERVICE HANDBOOK INTRODUCTION......... |
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QUALIFICATIONS.................................................................................................................. |
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3 |
TOOLS REQUIRED............................................................................................................... |
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3 |
COMMERCIAL TANK TYPE GAS MODEL NUMBER BREAK DOWN.................................. |
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INSTALLATION CONSIDERATIONS - CLEARANCES......................................................... |
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4 |
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TOP AND FRONT VIEWS OF MINIMUM CLEARANCES TO COMBUSTIBLES.................. |
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MINIMUM CLEARANCE TO COMBUSTIBLES..................................................................... |
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REQUIRED EXTERIOR CLEARANCES................................................................................ |
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6 |
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REQUIRED EXTERIOR CLEARANCES................................................................................ |
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7 |
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INSUFFICIENT MAKEUP AIR ........ |
NEGATIVE AIR PRESSURE .....DOWNDRAFTS........ |
7 |
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MAKE-UP AIR – DIRECT COMMUNICATION WITH OUTDOORS....................................... |
8 |
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CONTAMINATED AIR............................................................................................................ |
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9 |
AIR FOR COMBUSTION – FLAMMABLE ITEMS.................................................................. |
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GAS VALVE......................................................................................................................... |
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10 |
GAS VALVE......................................................................................................................... |
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11 |
VENTING............................................................................................................................. |
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12 |
VENTING – MULTIPLE CATEGORY I GAS WATER HEATERS......................................... |
12 |
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VENT TABLES FOR CATEGORY I - TYPE B GAS VENT.................................................. |
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13 |
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VENT TABLES FOR CATEGORY I - TYPE B GAS VENT.................................................. |
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14 |
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VENT TABLES FOR CATEGORY I - TYPE B GAS VENT.................................................. |
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15 |
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VENT TABLES FOR CATEGORY I - TYPE B GAS VENT.................................................. |
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16 |
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VENT TABLES FOR CATEGORY I - TYPE B GAS VENT.................................................. |
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17 |
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SBN /SBD30-150/199 SEQUENCE OF OPERATION......................................................... |
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18 |
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COMBINED VENTING......................................................................................................... |
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19 |
9 RULES FOR GOOD VENTING......................................................................................... |
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20 |
9 RULES FOR GOOD VENTING......................................................................................... |
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21 |
9 RULES FOR GOOD VENTING......................................................................................... |
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22 |
DRAFT PROVING PRESSURE SWITCH - SETTINGS....................................................... |
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23 |
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THERMOSTAT AND IGNITION CONTROL BOARD VIEW................................................. |
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24 |
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WHITE RODGERS INTEGRATED CONTROL - THERMOSTAT........................................ |
25 |
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WHITE RODGERS IGNITION CONTROL BOARD.............................................................. |
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26 |
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GAS CONTROL VALVE / BURNER AREA VIEW................................................................ |
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27 |
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WIRING DIAGRAM.............................................................................................................. |
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28 |
ELECTRICAL SEQUENCE – SBN, SBD30-150/199........................................................... |
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29 |
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OPERATING SEQUENCE – FLOW CHART........................................................................ |
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30 |
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DIAGNOSTIC SEQUENCE OF OPERATION – FLOW CHART.......................................... |
31 |
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PRE-SERVICE CHECK LIST............................................................................................... |
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32 |
TEST 1 – 120VAC POWER CHECK ................................................................................... |
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33 |
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State Water Heaters |
1 |
Technical Training Department |
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Ashland City, Tennessee © 2007 |
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SBN71-120 thru 85-390, SBD30-150/199 TANK TYPE COMMERCIAL |
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GAS WATER HEATER SERVICE HANDBOOK |
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WATER HEATER CONTROL BOARD TROUBLESHOOTING AND DIAGNOSTIC LED |
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INTERPRETATION............................................................................................................................. |
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33 |
WATER HEATER CONTROL BOARD TROUBLESHOOTING AND DIAGNOSTIC LED |
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INTERPRETATION............................................................................................................................. |
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34 |
TEST 2 – POLARITY CHECK............................................................................................................. |
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35 |
TEST 3 - CONTINUITY CHECK OF HIGH LIMIT (ECO).................................................................... |
36 |
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TEST 4 - UPPER TEMPERATURE PROBE CONTINUITY CHECK.................................................. |
37 |
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TEST 5 - CALLING FOR HEAT – NO INDUCER OPERATION......................................................... |
38 |
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TEST 6 - INDUCER ON............. |
NO IGNITION.................................................................................. |
39 |
TEST 7 – INDUCER ON, PROVER SWITCH AND LOW GAS PRESSURE SWITCH CLOSED |
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....................NO IGNITER OPERATION............................................................................................. |
40 |
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TEST 8 – IGNITER HEATS .............. |
NO MAIN BURNER................................................................. |
41 |
TEST 9 – IGNITER HEATS ....... |
NO MAIN BURNER......................................................................... |
42 |
TEST 10 - MAIN BURNER IGNITION FOR LESS THAN 5 SECONDS............................................. |
43 |
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TEST 11 - WATER HEATER SHUTTING OFF BELOW SETTING.................................................... |
44 |
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DISPLAY LIGHTS ON INTEGRATED WATER HEATER CONTROL................................................ |
45 |
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PARTS SBN71-120 thru 85-390 series 100....................................................................................... |
46 |
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PARTS SBN71-120 thru 85-390 series 100....................................................................................... |
47 |
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PARTS SBN71-120 thru 85-390 series 100....................................................................................... |
48 |
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PARTS SBN71-120 thru 85-390 series 108....................................................................................... |
49 |
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PARTS SBN71-120 thru 85-390 series 108....................................................................................... |
50 |
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PARTS SBN71-120 thru 85-390 series 108....................................................................................... |
51 |
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PARTS SBD30-150/199NE................................................................................................................. |
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52 |
PARTS SBD30-150/199NE................................................................................................................. |
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53 |
SBN 71-120 thru 85-390, SBD30-150/199 SERVICE HANDBOOK INTRODUCTION
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.
State Water Heaters |
2 |
Technical Training Department |
Ashland City, Tennessee © 2007 |
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SBN71-120 thru 85-390, SBD30-150/199 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
•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
COMMERCIAL TANK TYPE GAS MODEL NUMBER BREAK DOWN
Rev. 1 Adds SBD30-150 and 30-199 models with parts lists. Adds SBN series 108 parts list.
State Water Heaters |
3 |
Technical Training Department |
Ashland City, Tennessee © 2007 |
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SBN71-120 thru 85-390, SBD30-150/199 TANK TYPE COMMERCIAL GAS WATER HEATER SERVICE HANDBOOK
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
State Water Heaters |
4 |
Technical Training Department |
Ashland City, Tennessee © 2007 |
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SBN71-120 thru 85-390, SBD30-150/199 TANK TYPE COMMERCIAL GAS WATER HEATER SERVICE HANDBOOK
MINIMUM CLEARANCE TO COMBUSTIBLES
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Model Number |
"A" Right Side |
"B" Left Side |
"C" Back "D" |
Ceiling |
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SBN-120 thru |
2" |
2" |
2" |
12" |
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200A |
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SBN-250/A thru |
3" |
3" |
3" |
12" |
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310/A |
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SBN-366 |
6" |
6" |
6" |
6" |
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SBN-390 |
4" |
4" |
4" |
4" |
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SBD30-150/199 |
2” |
2” |
2” |
12” |
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A, B, and C clearances to non-combustibles is “0” inches - a 12 inch clearance to cover remains |
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unchanged. |
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State Water Heaters |
5 |
Technical Training Department |
Ashland City, Tennessee © 2007 |
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SBN71-120 thru 85-390, SBD30-150/199 TANK TYPE COMMERCIAL GAS WATER HEATER SERVICE HANDBOOK
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”.
State Water Heaters |
6 |
Technical Training Department |
Ashland City, Tennessee © 2007 |
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SBN71-120 thru 85-390, SBD30-150/199 TANK TYPE COMMERCIAL GAS WATER HEATER SERVICE HANDBOOK
REQUIRED EXTERIOR CLEARANCES
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
INSUFFICIENT MAKEUP AIR ........ |
NEGATIVE AIR PRESSURE ..... |
DOWNDRAFTS |
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One common example is in a |
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restaurant |
installation |
where |
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exhaust vent equipment was not |
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considered in sizing make-up |
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requirements. This condition may |
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result in air being back drafted by |
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the restaurant exhaust |
equipment |
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through the heater causing the draft |
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proving switch to open and/or |
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erratic heater shutdown. |
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State Water Heaters |
7 |
Technical Training Department |
Ashland City, Tennessee © 2007 |
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SBN71-120 thru 85-390, SBD30-150/199 TANK TYPE COMMERCIAL GAS WATER HEATER SERVICE HANDBOOK
MAKE-UP AIR – DIRECT COMMUNICATION WITH OUTDOORS
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)
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.
State Water Heaters |
8 |
Technical Training Department |
Ashland City, Tennessee © 2007 |
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SBN71-120 thru 85-390, SBD30-150/199 TANK TYPE COMMERCIAL GAS WATER HEATER SERVICE HANDBOOK
CONTAMINATED AIR
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.
AIR FOR COMBUSTION – FLAMMABLE ITEMS
State Water Heaters |
9 |
Technical Training Department |
Ashland City, Tennessee © 2007 |
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SBN71-120 thru 85-390, SBD30-150/199 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. 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.
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TOP VIEW |
INLET VIEW |
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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.
State Water Heaters |
10 |
Technical Training Department |
Ashland City, Tennessee © 2007 |
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SBN71-120 thru 85-390, SBD30-150/199 TANK TYPE COMMERCIAL GAS WATER HEATER SERVICE HANDBOOK
GAS VALVE
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
State Water Heaters |
11 |
Technical Training Department |
Ashland City, Tennessee © 2007 |
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SBN71-120 thru 85-390, SBD30-150/199 TANK TYPE COMMERCIAL GAS WATER HEATER SERVICE HANDBOOK
VENTING
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 – MULTIPLE CATEGORY I GAS WATER HEATERS
State Water Heaters |
12 |
Technical Training Department |
Ashland City, Tennessee © 2007 |
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SBN71-120 thru 85-390, SBD30-150/199 TANK TYPE COMMERCIAL GAS WATER HEATER SERVICE HANDBOOK
VENT TABLES FOR CATEGORY I - TYPE B GAS VENT
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
Input:120,000 Btu/hr. |
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Total Vent Height (feet) |
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Vent Connector Size: 5” |
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6 |
8 |
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10 |
15 |
20 |
30 |
50 |
100 |
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Input Btu/hr |
Rise |
Vent Connector Diameter (inches) |
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120,000 |
1' |
6 |
6 |
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5 |
5 |
5 |
5 |
5 |
5 |
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120,000 |
2' |
5 |
5 |
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5 |
5 |
5 |
5 |
5 |
5 |
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120,000 |
3' |
5 |
5 |
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5 |
5 |
5 |
5 |
5 |
5 |
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No. of Units |
Combined Input (Btu/hr x 1,000) |
Combined Vent/Manifold Diameter |
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2 |
240,000 |
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7 |
7 |
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6 |
6 |
6 |
6 |
6 |
6 |
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3 |
360,000 |
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8 |
8 |
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7 |
7 |
7 |
6 |
6 |
6 |
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4 |
480,000 |
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9 |
9 |
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9 |
8 |
8 |
7 |
7 |
6 |
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Model: SBN 154; SBD30-150
Input:150,000/154,000 Btu/hr. |
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Total Vent Height (feet) |
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Vent Connector Size: 6” |
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6 |
8 |
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10 |
15 |
20 |
30 |
50 |
100 |
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Input Btu/hr |
Rise |
Vent Connector Diameter (inches) |
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150,000/154,000 |
1' |
6 |
6 |
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6 |
6 |
6 |
6 |
6 |
6 |
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150,000/154,000 |
2' |
6 |
6 |
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6 |
6 |
6 |
6 |
6 |
6 |
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150,000/154,000 |
3' |
6 |
6 |
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6 |
6 |
6 |
6 |
6 |
6 |
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No. of Units |
Combined Input (Btu/hr x 1,000) |
Combined Vent/Manifold Diameter |
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2 |
300,000/ 308,000 |
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7 |
7 |
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6 |
6 |
6 |
6 |
6 |
6 |
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3 |
450,000/ 462,000 |
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8 |
8 |
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7 |
7 |
7 |
6 |
6 |
6 |
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4 |
600,000/ 616,000 |
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9 |
9 |
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9 |
8 |
8 |
7 |
7 |
6 |
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State Water Heaters |
13 |
Technical Training Department |
Ashland City, Tennessee © 2007 |
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SBN71-120 thru 85-390, SBD30-150/199 TANK TYPE COMMERCIAL GAS WATER HEATER SERVICE HANDBOOK
VENT TABLES FOR CATEGORY I - TYPE B GAS VENT
Model: SBN80-180; SBN100-199; SBN100-200; SBD30-199
Input:180,000, 190,000 and 199,000 Btu/hr. |
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Total Vent Height (feet) |
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Vent Connector Size: 6” |
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6 |
8 |
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10 |
15 |
20 |
30 |
50 |
100 |
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Input Btu/hr |
Rise |
Vent Connector Diameter (inches) |
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180,000 |
1' |
7 |
7 |
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6 |
6 |
6 |
6 |
6 |
6 |
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199,000/200,000 |
1' |
7 |
7 |
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7 |
6 |
6 |
6 |
6 |
6 |
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180,000 |
2' |
6 |
6 |
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6 |
6 |
6 |
6 |
6 |
6 |
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199,000/200,000 |
2' |
7 |
7 |
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6 |
6 |
6 |
6 |
6 |
6 |
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180,000 |
3' |
6 |
6 |
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6 |
6 |
6 |
6 |
6 |
6 |
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199,000/200,000 |
3' |
6 |
6 |
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6 |
6 |
6 |
6 |
6 |
6 |
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No. of Units |
Combined Input (Btu/hr x 1,000) |
Combined Vent/Manifold Diameter |
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2 |
360,000 |
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7 |
7 |
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6 |
6 |
6 |
6 |
6 |
6 |
398,000/400,000 |
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7 |
7 |
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7 |
6 |
6 |
6 |
6 |
6 |
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3 |
540,000 |
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7 |
6 |
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6 |
6 |
6 |
6 |
6 |
6 |
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597,000/600,000 |
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6 |
6 |
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6 |
6 |
6 |
6 |
6 |
6 |
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4 |
720,000 |
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6 |
6 |
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6 |
6 |
6 |
6 |
6 |
6 |
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796,000/800,000 |
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6 |
6 |
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6 |
6 |
6 |
6 |
6 |
6 |
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State Water Heaters |
14 |
Technical Training Department |
Ashland City, Tennessee © 2007 |
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SBN71-120 thru 85-390, SBD30-150/199 TANK TYPE COMMERCIAL GAS WATER HEATER SERVICE HANDBOOK
VENT TABLES FOR CATEGORY I - TYPE B GAS VENT
Model: SBN100-250
Input:250,000 Btu/hr. |
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Total Vent Height (feet) |
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Vent Connector Size: 6” |
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6 |
8 |
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10 |
15 |
20 |
30 |
50 |
100 |
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Input Btu/hr |
Rise |
Vent Connector Diameter (inches) |
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250,000 |
1' |
8 |
8 |
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7 |
7 |
7 |
6 |
6 |
6 |
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250,000 |
2' |
7 |
7 |
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7 |
7 |
6 |
6 |
6 |
6 |
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250,000 |
3' |
7 |
7 |
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7 |
7 |
6 |
6 |
6 |
6 |
No. of Units |
Combined Input (Btu/hr x 1,000) |
Combined Vent/Manifold Diameter |
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2 |
500,000 |
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9 |
9 |
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9 |
8 |
8 |
7 |
7 |
7 |
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3 |
750,000 |
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12 |
12 |
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10 |
10 |
10 |
9 |
8 |
8 |
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4 |
1,000,000 |
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14 |
14 |
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12 |
12 |
10 |
10 |
9 |
9 |
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Model: SBN100-275
Input:275,000 Btu/hr. |
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Total Vent Height (feet) |
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Vent Connector Size: 6” |
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6 |
8 |
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10 |
15 |
20 |
30 |
50 |
100 |
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Input Btu/hr |
Rise |
Vent Connector Diameter (inches) |
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275,000 |
1' |
8 |
8 |
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7 |
7 |
6 |
6 |
6 |
6 |
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275,000 |
2' |
8 |
8 |
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7 |
7 |
6 |
6 |
6 |
6 |
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275,000 |
3' |
7 |
7 |
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7 |
7 |
6 |
6 |
6 |
6 |
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No. of Units |
Combined Input (Btu/hr x 1,000) |
Combined Vent/Manifold Diameter |
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2 |
550,000 |
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10 |
9 |
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9 |
8 |
8 |
8 |
7 |
7 |
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3 |
825,000 |
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12 |
12 |
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12 |
10 |
9 |
9 |
8 |
8 |
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4 |
1,100,000 |
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14 |
14 |
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14 |
12 |
12 |
10 |
9 |
9 |
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State Water Heaters |
15 |
Technical Training Department |
Ashland City, Tennessee © 2007 |
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SBN71-120 thru 85-390, SBD30-150/199 TANK TYPE COMMERCIAL GAS WATER HEATER SERVICE HANDBOOK
VENT TABLES FOR CATEGORY I - TYPE B GAS VENT
Model: SBN 85-310
Input:310,000 Btu/hr. |
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Total Vent Height (feet) |
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Vent Connector Size: 6” |
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6 |
8 |
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10 |
15 |
20 |
30 |
50 |
100 |
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|
Input Btu/hr |
Rise |
Vent Connector Diameter (inches) |
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310,000 |
1' |
9 |
8 |
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8 |
8 |
7 |
7 |
6 |
6 |
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310,000 |
2' |
8 |
8 |
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8 |
7 |
7 |
7 |
6 |
6 |
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310,000 |
3' |
8 |
8 |
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8 |
7 |
7 |
7 |
6 |
6 |
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No. of Units |
Combined Input (Btu/hr x 1,000) |
Combined Vent/Manifold Diameter |
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2 |
620,000 |
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10 |
10 |
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9 |
9 |
8 |
8 |
7 |
7 |
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3 |
930,000 |
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14 |
12 |
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12 |
12 |
10 |
9 |
9 |
8 |
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4 |
1,240,000 |
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14 |
14 |
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14 |
12 |
12 |
12 |
10 |
9 |
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State Water Heaters |
16 |
Technical Training Department |
Ashland City, Tennessee © 2007 |
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