State Water Heaters SBN 71-120NE Service Handbook
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State Water Heaters SBN 71-120NE Service Handbook

State Water Heaters SBN 71-120NE Service Handbook

For self-cleaning induced draft multi flue commercial gas water heaters
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SBN 71120 through 85390 (A)
SERIES 100 Models
SBN Meets Low NOx Requirements of SCAQMD
Rules 1121 & 1146.2
Part No. STC-074
For propane inputs and other more detailed information,
$20.00 Printed in the U.S.A.
visit www.statewaterheaters.com to view or download Specification Sheets.
Handbook
Multi Flue Commercial
Gas Water Heaters
0204
Service
For Self-Cleaning
Induced Draft
2

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Summary of Contents for State Water Heaters SBN 71-120NE

  • Page 1 SBN 71120 through 85390 (A) SERIES 100 Models SBN Meets Low NOx Requirements of SCAQMD Rules 1121 & 1146.2 Part No. STC-074 For propane inputs and other more detailed information, $20.00 Printed in the U.S.A. 0204 visit www.statewaterheaters.com to view or download Specification Sheets.

  • Page 2: Table Of Contents

    SBN TANK TYPE COMMERCIAL GAS WATER HEATER SBN Service Handbook Introduction ... 2-3 Installation Considerations ... 4 Clearances ... 4 Exterior Clearance ... 5 Air Supply ... 6 Contaminated Air ... 9 Flammable Items ... 9 Gas Valve ... 10 Outlet View ...

  • Page 3: 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: •...

  • Page 4: Tools Required

    SBN TANK TYPE COMMERCIAL GAS WATER HEATER 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 •...

  • Page 5: Installation Considerations

    SBN TANK TYPE COMMERCIAL GAS WATER HEATER 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.

  • Page 6: Exterior Clearance

    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).

  • Page 7: Air Supply

    SBN TANK TYPE COMMERCIAL GAS WATER HEATER 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.
  • Page 8 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.
  • Page 9 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.

  • Page 10: Contaminated Air

    SBN TANK TYPE COMMERCIAL GAS WATER HEATER 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.

  • Page 11: Gas Valve

    SBN TANK TYPE COMMERCIAL GAS WATER HEATER SERVICE HANDBOOK Gas Valve The supply gas pressure is normally measured at the gas Inlet View 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.

  • Page 12: Outlet View

    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...

  • Page 13: Venting

    SBN TANK TYPE COMMERCIAL GAS WATER HEATER SERVICE HANDBOOK 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 –...
  • Page 14 SBN TANK TYPE COMMERCIAL GAS WATER HEATER 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. EXAMPLE: To combine two 6” vents with an 8”...
  • Page 15 SBN TANK TYPE COMMERCIAL GAS WATER HEATER 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. ©2003 SERVICE HANDBOOK 6.
  • Page 16 SBN TANK TYPE COMMERCIAL GAS WATER HEATER Technical Training Department Ashland City, Tennessee 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. ©2003...
  • Page 17 SBN TANK TYPE COMMERCIAL GAS WATER HEATER 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.

  • Page 18: Technical Data Venting

    SBN TANK TYPE COMMERCIAL GAS WATER HEATER MODEL SBN 100-250NE Input: 250,000 Btu/hr Vent Connector Size: 6 inches Number of Heaters in Thousands of Btu/hr MODEL SBN 100-275NE Input: 275,000 Btu/hr Vent Connector Size: 6 inches Number of Heaters in Thousands of Btu/hr MODEL SBN 85-310 Input: 310,000 Btu/hr Vent Connector Size: 6 inches...

  • Page 19: Sequence Of Operation

    SBN TANK TYPE COMMERCIAL GAS WATER HEATER 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.

  • Page 20: Front View

    SBN TANK TYPE COMMERCIAL GAS WATER HEATER SERVICE HANDBOOK FRONT VIEW OF WATER HEATER Technical Training Department ©2003 Ashland City, Tennessee...
  • Page 21 SBN TANK TYPE COMMERCIAL GAS WATER HEATER SERVICE HANDBOOK WHITE ROGERS INTEGRATED WATER HEATER CONTROL (PART NO. 194393-0) - ALSO CALLED “THERMOSAT” ©2003 Technical Training Department Ashland City, Tennessee...
  • Page 22 SBN TANK TYPE COMMERCIAL GAS WATER HEATER SERVICE HANDBOOK HSI INTEGRATED IGNITION CONTROL BOARD (PART NO. 194392) Technical Training Department ©2003 Ashland City, Tennessee...
  • Page 23 SBN TANK TYPE COMMERCIAL GAS WATER HEATER LOWER FRONT VIEW OF SBN WATER HEATER Part Number Volts AC Ohms Resistance ©2003 SERVICE HANDBOOK Notice that rods cross main burner flame .1 - .25” 194405 Nominal 80 VAC 11.0 - 20.0 @ 77° F (25° C) Technical Training Department Ashland City, Tennessee...

  • Page 24: Wiring Diagram

    SBN TANK TYPE COMMERCIAL GAS WATER HEATER Propane (series) models do not have a low gas presure switch. Technical Training Department Ashland City, Tennessee SERVICE HANDBOOK WIRING DIAGRAM Upper ©2003...

  • Page 25: Electrical Sequence

    SBN TANK TYPE COMMERCIAL GAS WATER HEATER ELECTRICAL SEQUENCE OF SBN WATER HEATER OPERATION Closes -1.6 to -2.60 ± .10 W.C. depending on heater model Variable Voltage (80-120 VAC) Gas Valve Open Tank Heated to Set Temperature Gas Valve – Off Call for Heat LED - Off 60 Second Blower Post Purge Blower Prover - Opens...

  • Page 26: Pre-Service Checklist

    SBN TANK TYPE COMMERCIAL GAS WATER HEATER 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? ____________________________________________________ Did you take notice of the red LED in the upper left corner of...

  • Page 27: Control Board Diagnostic Led Interpretation And Troubleshooting

    SBN TANK TYPE COMMERCIAL GAS WATER HEATER CONTROL BOARD DIAGNOSTIC LED INTERPRETATION AND TEST 1 - 120 VAC CHECK TO WATER HEATER Conditions: No Green display “Power” LED on. Plugs are in receptacles. Supply power breaker is not “open” On/Off heater switch is “On”. 120 Vac Check To Water Heater On Switch TEST 1 Check for 115-125 VAC black wire to ground...
  • Page 28 SBN TANK TYPE COMMERCIAL GAS WATER HEATER FLASH CODES OF DIAGNOSTIC INDICATOR Conditions: Power On Red, heater control “Call for Heat” LED – on Red, ignition control board diagnostic LED – Flashing Note LED Flash Code before resetting heater. LED Status 1 Flash System is in lock out.

  • Page 29: Polarity Check

    SBN TANK TYPE COMMERCIAL GAS WATER HEATER TEST 2 - POLARITY CHECK - continued Polarity Check TEST 2 Check from on/off switch center and white wire terminals to ground If… 115-125 VAC is not present voltage is present white (right terminal) to ground but not black (center terminal) to ground TEST 3 - CONTINUITY CHECK...

  • Page 30: Upper Temperature Probe Check

    SBN TANK TYPE COMMERCIAL GAS WATER HEATER TEST 3 - CONTINUITY CHECK OF HIGH LIMIT (ECO)- Continuity check of ECO (energy cut-off, high limit) TEST 3 Black to Black wires of upper probe. Power is off. If… continuity is indicated continuity is not present water is less than 120°...
  • Page 31 SBN TANK TYPE COMMERCIAL GAS WATER HEATER TEST 5 - CALLING FOR HEAT – NO INDUCER OPERATION Conditions: Power on Plugs in Receptacles Red “ Call for Heat” LED-ON Inducer “Off” Note flash code on ignition control board diagnostic LED 115-120 V Check to Inducer TEST 5 Test on Ignition Board 4 Pin Receptacle E4...
  • Page 32 SBN TANK TYPE COMMERCIAL GAS WATER HEATER TEST 6 - INDUCER ON-NO IGNITION Conditions: Power on Plugs in receptacles Inducer operating No power to Hot Surface Igniter (HSI) Note flash code of LED 24 VAC Check of Blower Prover/Low Gas Pressure Circuit TEST 6 If…...
  • Page 33 SBN TANK TYPE COMMERCIAL GAS WATER HEATER TEST 7 - INDUCER ON – PROVER SWITCH AND LOW GAS SWITCH CLOSED – NO IGNITER OPERATION Conditions: Power on Plugs in receptacles Inducer on 24V at ignition board E1, Pin 10 No Power to igniter Note: Flash code of LED Continuity Test E4 Plug...
  • Page 34 SBN TANK TYPE COMMERCIAL GAS WATER HEATER TEST 8 - IGNITER HEATS – NO MAIN BURNER Conditions: Plugs in receptacle Igniter energizes (gets red) No main burner or main shuts off within 5 seconds. Note flash code of LED. Pin 9 E1 Plug, Pin 9 Plug in Receptacle Test of Igniter and gas valve circuit...
  • Page 35 SBN TANK TYPE COMMERCIAL GAS WATER HEATER TEST 9 - IGNITER HEATS – NO MAIN BURNER Conditions: Test 8 completed then: Turn off power Disconnect wires from gas valves Continuity Check Of Gas Valve Coil TEST 9 If… meter reads 0 or 1 meter indicates pilot and main coil have continuity ©2003...

  • Page 36: Flame Prover Check

    SBN TANK TYPE COMMERCIAL GAS WATER HEATER TEST 10 - MAIN BURNER IGNITION FOR LESS THAN 5 SECONDS Conditions: Power On – plug connected Main Burner ignites for approximately 5 seconds then goes out. Tests 8 and 9 completed Note flash code on ignition board LED. Pin 2 E1, Pin 2 - From Flame Proving Rod Flame Prover Circuit Check...

  • Page 37: Water Temperature Circuit Check

    SBN TANK TYPE COMMERCIAL GAS WATER HEATER TEST 11 - WATER HEATER SHUTTING OFF BELOW SETTING Conditions: Main burner ignited Stored water is below temperature setting more than 5° F (Tank Average). Power off Plug disconnected from heater control board receptacle E3 and E4 Black TEST 11 If…...
  • Page 38 SBN TANK TYPE COMMERCIAL GAS WATER HEATER DISPLAY LIGHTS ON INTEGRATED HEATER CONTROL LED Status LED Status Technical Training Department Ashland City, Tennessee SERVICE HANDBOOK Green Indication Indication Calling for heat Calling for heat The ECO (Energy Cut The ECO (Energy Cut Off) has opened.
  • Page 39 SBN TANK TYPE COMMERCIAL GAS WATER HEATER LED INDICATORS ON HOT SURFACE IGNITION (HSI) USING FLASHING RED LED ON HSI (HOT SURFACE IGNITION) LED STATUS INDICATION 1 Flash System is in lockout. 2 Flashes Draft proving (pressure) switch (closes at -2.10 +0.01 inches W.C.
  • Page 40 SBN TANK TYPE COMMERCIAL GAS WATER HEATER LED INDICATORS ON HOT SURFACE IGNITION (HSI) USING FLASHING RED LED ON HSI (HOT SURFACE IGNITION) LED STATUS 7 Flashes Flame sensor reads a low flame signal for more than 4.25 sec. 8 Flashes No ignition sensed Continuous Continuous flame...
  • Page 41 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 www.stateind.com ©2003 Technical Training Department Ashland City, Tennessee...
  • Page 42 SBN TANK TYPE COMMERCIAL GAS WATER HEATER Blower Assembly: 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 ...
  • Page 43 SBN TANK TYPE COMMERCIAL GAS WATER HEATER Item Blower Assembly: 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 ...

  • Page 44: General Questions And Answers

    SBN TANK TYPE COMMERCIAL GAS WATER HEATER 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 •...
  • Page 45 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.

  • Page 46: Electrical Information

    SBN TANK TYPE COMMERCIAL GAS WATER HEATER Part Name Integrated Water Heater Control (Temperature Control Board) Inducer (Blower) ECO (Part of Upper Temperature Sensor) Main Gas Valve Inducer (Blower) Igniter OPT Power Venter Draft Proving (Pressure) Switch Table SBN Models 120, 200, 250, 390 154, 180, 199 Technical Training Department...
  • Page 47 For Additional Information Contact State Water Heater Technical Information 1-800-365-0577 Prepared By The Training Department In Ashland City, Tennessee Website: www.statewaterheaters.com...

This manual is also suitable for:

Sbn 81-180neSbn 100-199neSbn 100-250neaSbn 100-275neaSbn 85-310neaSbn 85-366nea ... Show all

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