State Water Heaters SBL85275NEA Service Handbook
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State Water Heaters SBL85275NEA Service Handbook

State Water Heaters SBL85275NEA Service Handbook

Commercial gas water heaters ultra low nox series 104
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Service Handbook
COMMERCIAL GAS WATER HEATERS
FOR MODELS:
SBL85275NE(A), SBL85310NE(A),
SBL85366NE(A) & SBL85390NE(A)
ULTRA LOW NOx SERIES 104
500 Tennessee Waltz Parkway
INSTALLATION CONSIDERATIONS - PRE SERVICE CHECKS -
Ashland City, TN 37015
CONSTRUCTION - OPERATION & SERVICE - TROUBLESHOOTING
SERVICING SHOULD ONLY BE PERFORMED BY A QUALIFIED SERVICE TECHNICIAN
PRINTED IN THE U.S.A. 0414
325018-000

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Summary of Contents for State Water Heaters SBL85275NEA

  • Page 1 Service Handbook COMMERCIAL GAS WATER HEATERS FOR MODELS: SBL85275NE(A), SBL85310NE(A), SBL85366NE(A) & SBL85390NE(A) ULTRA LOW NOx SERIES 104 500 Tennessee Waltz Parkway INSTALLATION CONSIDERATIONS - PRE SERVICE CHECKS - Ashland City, TN 37015 CONSTRUCTION - OPERATION & SERVICE - TROUBLESHOOTING SERVICING SHOULD ONLY BE PERFORMED BY A QUALIFIED SERVICE TECHNICIAN PRINTED IN THE U.S.A.

  • Page 3: Table Of Contents

    TABLE OF CONTENTS INTRODUCTION ..............2 QUALIFICATIONS .

  • Page 4: Introduction

    INTRODUCTION The service handbook is designed to aid in servicing and troubleshooting State Water Heaters SBL(A) commercial water heaters in the field. No duplication or reproduction of this book may be made without the express written authorization of the State Water Heaters.

  • Page 5: Tools Required

    TOOLS REQUIRED • Electrical multimeter capable of measuring continuity/ ohms, ac & dc volts, amperes, microamperes, millivolts, and frequency (hz) • UEi Model DL289 or equivalent • Digital manometer + 60" w. c., resolution 0.01" increments Note: A digital manometer is required for testing pressure switches and can replace a gas pressure gauge, draft gauge or slack tube manometer for checking gas pressure.

  • Page 6: Installation Considerations

    INSTALLATION CONSIDERATIONS GAS AND ELECTRICAL CHARACTERISTICS GAS SUPPLY PRESSURE MODELS GAS TYPE VOLTS/HZ AMPERES MINIMUM MAXIMUM All Models Natural 3.5" WC (0.87 kPa) 14.0" WC (3.45 kPa) 120/60 < 5 All models require a minimum gas supply pressure of 3.5” W.C. The minimum supply pressure is measured while gas is flowing (dynamic pressure).
  • Page 7 AIR SUPPLY: Stoichiometric or theoretical complete combustion requires 10 cubic feet of air per 1,000 BTU 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.
  • Page 8 – MAKE-UP AIR DIRECT COMMUNICATION WITH OUTDOORS: A fresh supply of make-up air for combustion can be supplied to the water 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.
  • Page 9 AIR REQUIREMENTS: For safe operation an adequate supply of fresh uncontaminated air for combustion and ventilation must be provided. An insufficient supply of air can cause recirculation of combustion products resulting in contamination that may be hazardous to life. Such a condition often will result in a yellow, luminous burner flame, causing sooting of the combustion chamber, burners and flue tubes and creates a risk of asphyxiation.

  • Page 10: Features And Components

    FEATURES AND COMPONENTS Exhaust/Vent Outlet Tube Inlet Tube T & P Relief Valve Upper Thermostat Probe/ECO Control Box Assembly Clean Out Cover Lower Thermostat Probe Drain Valve The Eliminator Combustion Blower & Burner Assembly Combustion Gas Control Gas Supply Piping: Air Intake Valve 3/4"...

  • Page 11: Blower And Burner Assembly

    BLOWER AND BURNER ASSEMBLY Gas Orifice Blower Fasteners (4) Gas Valve Flange Blower Flange Flange Silicone Plate Gasket Skirt Ring Flange Gasket Adapter Tube Burner Gas Control Valve Fasteners (4) Brass Locknuts (3) Brass nuts/ Lockwashers (4) Flame Burner Spark Igniter Sensor Gasket BURNER REPLACEMENT:...
  • Page 12 7. Remove the 4 brass nuts and 4 lockwashers holding the flange plate to the skirt ring flange. 8. Pull the adapter tube/flange plate/burner assembly out of the combustion chamber. Take care not to damage the spark igniter or flame sensor during the removal process. 9.

  • Page 13: Spark Igniter, Flame Sensor, Sight Glass

    SPARK IGNITER, FLAME SENSOR, SIGHT GLASS The spark igniter and the flame sense rod are shown below. Also shown is the burner sight glass. These features are typical for all models. Burner Flame Sensor Sightglass Spark Igniter SPARK IGNITER / FLAME SENSOR / CONTROL TIMING SPARK IGNITER This water heater is equipped with a spark igniter.

  • Page 14: Venting

    VENTING INSTALLATION – VENTING CATEGORY AND MATERIALS SBL(A) MODELS VENTING Category I • Non-condensing, negative pressure in vent, below atmospheric. Type venting • Must be installed Conventional Vent; uses room air for combustion and discharges flue gases to the outdoor atmosphere through one pipe. Vent materials •...
  • Page 15 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).

  • Page 16: Venting Tables - Technical Venting Data

    VENTING TABLES TECHNICAL VENTING DATA – 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 and tables below which give sizing and data based upon NFPA 54 ANSI Z223.1. MODEL SBL85275NE(A) Input: 275,000 Btu/hr Total Vent Height (Feet)
  • Page 17 TYPE B GAS VENT: Single Gas Fired Tank-Type Heater When venting single tank type water heater using Type B vent pipe, follow the tables below which give sizing and data based upon NFPA 54 ANSI Z223.1. MODELS TOTAL VENT HEIGHT (FEET) Lateral (Feet) Minimum Vent Diameter (Inches) MODEL SBL85275NE(A)

  • Page 18: Operation And Service

    OPERATION AND SERVICE SEQUENCE OF OPERATION: 1. Switch power on to unit. 2. Thermostat calls for heat. 3. VFD sends power to Blower. 4. Blower runs at low speed. 5. Combustion Blower initiates air flow through water heater closing the Prover Switch. 6.

  • Page 19: Diagnostic Sequence Of Operation - Flow Chart

    DIAGNOSTIC SEQUENCE OF OPERATION – FLOW CHART Servicing should only be performed by a Qualified Service Technician...

  • Page 20: Sequence Of Operation - Flow Chart

    SEQUENCE OF OPERATION – FLOW CHART Servicing should only be performed by a Qualified Service Technician...

  • Page 21: Lighting And Operating Label

    LIGHTING AND OPERATING LABEL WARNING: If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life. FLAMMABLE BEFORE OPERATING: ENTIRE SYSTEM MUST BE FILLED WITH WATER AND AIR PURGED FROM ALL LINES. If you cannot reach your gas supplier, call the fire This appliance does not have a pilot.

  • Page 22: Troubleshooting

    TROUBLESHOOTING REMEDY COMPLAINT CAUSE USER QUALIFIED AGENCY *Water not hot enough. Thermostat set too low. Set thermostat dial to a higher temperature Upper and/or lower Call qualified agency. Check continuity and resistance temperature probe out of (Ohms) of upper and lower calibration.

  • Page 23: Controls Overview - Control Box Assembly

    CONTROLS OVERVIEW - CONTROL BOX ASSEMBLY ON/OFF Switch Variable Frequency Drive Digital Thermostat Blocked Outlet Switch High Speed I/O Module Ignition Control Blower Prover Switch Low Speed I/O Module Servicing should only be performed by a Qualified Service Technician...

  • Page 24: Pressure Switches - All Models

    PRESSURE SWITCHES – ALL MODELS All SBL models are provided with two pressure switches. These switches are essential to the safe and proper operation of the unit. The switches are wired to the Ignition control in series. It is important to understand the purpose of each switch.

  • Page 25: High Limit Switch/ Digital Thermostat

    BLOWER PROVER SWITCH The blower prover switch is provided on the heater to verify that the fan is operating. It is a positive pressure switch whose electrical contacts are normally open. The blower prover switch electrical contacts will close on a rise in pressure as the blower increases the pressure in the burner. This switch is connected to the blower outlet pressure tap by a piece of silicone tubing.
  • Page 26 DISPLAY LIGHTS – DIGITAL THERMOSTAT INDICATION ACTION STATUS Calling for heat Normal status. No action required. • Check for excessively hot water (203° F or higher). The ECO (Energy Cut-Out) has opened. • Check the resistance of the temperature probes and continuity of the high limit (ECO). No power Check the breaker.

  • Page 27: Continuity Check Of High Limit (Eco)

    CONTINUITY CHECK OF HIGH LIMIT (ECO) CONDITIONS: • Power On – No Hot Water. • Red, digital thermostat “Call for Heat” LED – On. • Turn Power OFF. Continuity check of ECO (energy cut-out, high limit) Black to Black wires of upper probe. Power is off. IF..

  • Page 28: Upper Temperature Probe Continuity Check

    UPPER TEMPERATURE PROBE CONTINUITY CHECK CONDITIONS: • Power On – Water below temperature set point. • Red, digital thermostat “Reset Status” LED – OFF. • "Call for Heat" LED Off. OHMS RESISTANCE TABLE ° F OHMS 70° 11,884 120° 3,759 140°...

  • Page 29: Lower Temperature Probe Continuity Check

    LOWER TEMPERATURE PROBE CONTINUITY CHECK CONDITIONS: • Main burner ignited. • Stored water is below temperature setting more than 5° F (Tank Average). • Power Off. • Plug disconnected from digital thermostat receptacle E4. OHMS RESISTANCE TABLE ° F OHMS 70°...

  • Page 30: Ignition Control

    IGNITION CONTROL Each heater is equipped with an ignition control. The solid state ignition control, ignites the burner by utilizing a spark igniter. The spark igniter shuts off during the heating cycle and the burner flame is sensed through a remote flame sensor.

  • Page 31: Start Up/ Flame Recovery/ Safety Lockout

    START UP/ FLAME RECOVERY/ SAFETY LOCKOUT START UP - HEAT MODE When a call for heat is received from the thermostat supplying 24 volts to TH/W, the control will reset, perform a self check routine, flash the diagnostic LED once in the first two seconds, and a pre-purge delay begins. Following the pre-purge period, the gas valve is energized and sparks commence for the trial for ignition period.
  • Page 32 FAULT CONDITIONS The water heater is equipped with an ignition control that incorporates a diagnostic system to assist in troubleshooting the appliance. The indicator codes on the ignition module are as follows: LED INDICATION FAULT MODE 2 Flashes Flame sensed without call for heat. 3 Flashes Ignition Lockout.

  • Page 33: Variable Frequency Drive - Sbl85275Ne(A) Thru Sbl85390Ne(A)

    VARIABLE FREQUENCY DRIVE – SBL85275NE(A) THRU SBL85390NE(A) The SBL85275NE(A) thru SBL85390NE(A) models have a variable frequency drive (VFD) that controls the speed of the blower motor. The VFD receives a signal from the thermostat and ignition control that instructs the VFD to transmit the proper frequency to the blower to produce the proper blower speed and proper input rate.

  • Page 34: Characteristics And Functions Of The Control Terminals

    Two conditions must be met for the variable frequency drive to switch the blower from low speed to high speed: 1. 100 - 120VAC must be supplied to the VFD input. 2. The ignition control closes a contact through the high speed I/O module – VFD terminals LI2 and +24V.

  • Page 35: Wiring Diagram - Sbl85275Ne(A) Thru Sbl85390Ne(A)

    WIRING DIAGRAM – SBL85275NE(A) THRU SBL85390NE(A) Servicing should only be performed by a Qualified Service Technician...
  • Page 36 COMMERCIAL GAS WATER HEATERS Visit the "Information Central" link of www.statewaterheaters.com for a listing of available Service Handbooks. For additional information contact: State Water Heaters 500 Tennessee Waltz Parkway Ashland City, TN 37015 1-800-527-1953 www.statewaterheaters.com ©2014 State Industries, Inc. 325018-000...

This manual is also suitable for:

Sbl85275neSbl85310neaSbl85310neSbl85366neaSbl85366neSbl85390nea ... Show all

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