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GSW John Wood Installation And Operating Instructions Manual

Commercial gas water heater signature series
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COMMERCIAL GAS WATER HEATER
INSTALLATION AND OPERATING INSTRUCTIONS
for Signature Series models with prefix JWSC and AJWSC
Read and understand these instructions thoroughly before starting.
WARNING:
Improper installation, adjustment, alter-
ation, service, or maintenance can cause
injury or property damage. Refer to this
manual. For assistance or additional infor-
mation, consult a qualified installer, serv-
ice agency, or the gas utility.
FOR YOUR SAFETY
• Do not store or use gasoline or other
flammable vapours and liquids in the
vicinity of this or any other appliance.
• Installation and service must be per-
formed by a qualified installer, service
agency or the gas utility.
WARNING:
If the information in these instructions is
not followed exactly, a fire or explosion
may result causing property damage, per-
sonal injury or death.
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do
not use any phone in your building.
• Immediately call your gas supplier from
a neighbor's phone. Follow the gas
supplier's instructions.
• If you cannot reach your gas supplier,
call the fire department.
GSW Water Heating is a division of
A. O. Smith Enterprises Ltd.
PART NO. 64128 REV. A (07-05)

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  • Page 1 • Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions. • If you cannot reach your gas supplier, call the fire department. PART NO. 64128 REV. A (07-05) GSW Water Heating is a division of A. O. Smith Enterprises Ltd.

  • Page 2: Table Of Contents

    TABLE OF CONTENTS I) Introduction ..........3 User Responsibilities .

  • Page 3: I) Introduction

    Your safety and the safety of others is very important. We have provided many important safety messages in this manual and on your appliance. Always read and obey all safety messages. This is the safety alert symbol. This symbol alerts you to potential hazards that can kill or hurt you and others. All safety messages will follow the safety alert symbol and either the word “DANGER”...

  • Page 4: Ii) Safety

    II) SAFETY WARNING This water heater is design-certified by CSA International as a Category I, non-direct vented water heater which takes its combustion air either from the installation area or from air ducted to the unit from the outside. In addition to the installation instructions found in this man- ual, the water heater must be installed in accordance with all local and provincial or state codes or, in the absence of FLAMMABLE VAPOURS...

  • Page 5: Safety Warning (Scalding)

    Safety Warning (Scalding) Relief Valve Requirements (T&P) All water heaters must be fitted with a proper temperature DANGER and pressure relief valve. These valves must be certified as meeting the requirements of the “Standard For Relief Valves Water Supply Systems, ANSI Z21.22/CSA 4.4”.

  • Page 6: Iii) Installation

    GSW on the inside of panels. WILL NOT ASSUME ANY LIABILITY for damage caused by water leaking from the water heater, pressure relief •...

  • Page 7: Gas Supply

    • If the water heater is installed in a restaurant or food serv- with the NSF International requirement, install leg exten- ice location where the floor is cleaned frequently, NSF sion kit. For availability contact 1-888-479-8324 International requires the water heater to maintain •...

  • Page 8: Gas Pressure

    Note: If using a flexible gas connector, make sure its rating 2. Install a drip leg (if not already incorporated as part of tag matches or exceeds the input of the water heater. the water heater) as shown. The drip leg must be no Tables 1, 2, and 3 provide a sizing reference for commonly less than 76mm (3 in.) long for the accumulation of dirt, used gas pipe materials.

  • Page 9: Air Requirements

    Gas Leak Testing come from a corrosive atmosphere. Any failure due to cor- rosive elements in the atmosphere is excluded from war- WARNING ranty coverage. Exposure to a higher gas supply pressure Installations in or for certain places including, but not limited may cause damage to the gas valve, result- to, those listed below will require outdoor air for combustion ing in explosion or fire.
  • Page 10 Louvers and Grills Openings for air supply ducts must provide free unobstruct- ed air movement. Louver and grill openings must be sized to ensure that the FREE OPEN AREA is never less than the area of the air duct. LOCATION: The locations for top and bottom openings are as follows: For Canadian installations: The top opening shall be located as close to the ceiling as practical but never lower...

  • Page 11: Venting

    • Some models are shipped with a vent reducer. The vent Acceptable equivalent duct Com bined input of Required reducer can be installed directly to the drafthood if the diam eter all appliances in free area of existing vent system is adequately sized to support the confined space duct exhaust gases.

  • Page 12: Water Supply

    Water Heater Inlet Tube Inlet Tube Drafthood Dip Tube Bracket screws Model Base # (Optional Front) (Optional Back) 75-125 60238 60239 60239 Drafthood Damper 80-199 60053 60057 60057 screws motor 80-250 60053 60057 60057 100-199 71325 75085 75086 100-270 71325 75085 60023 75-300...
  • Page 13 For example, a top inlet connection must use a top outlet DO NOT tamper with the integrated control, gas valve, ignit- connection. er or temperature and pressure relief valve. Tampering 2. The installation of unions in both the hot and cold water voids all warranties.
  • Page 14 The Discharge Line: • Must not be smaller than the pipe size of the relief valve or have any reducing coupling installed in the discharge Temperature and Pressure line. Relief Valve • Must not be capped, blocked, plugged or contain any valve between the relief valve and the end of the dis- charge line.
  • Page 15 Outlet Boosted Hot Water Temperature to Fixtures Shut-off Valve Shut-off Valve Temperature Temperature and Pressure and Pressure Relief Valve Relief Valve Thermometer Thermometer Pre-Heater Typical Thermal Booster Expansion Heater Tank Check Valve Pressure Reducing Shut-off Valve Valve Pre-Heated 45mm (1 1/2 in.) Water to Cold water supply the Booster...

  • Page 16: Electrical Supply

    ELECTRICAL SUPPLY breaker protection. The water heater draws less than 7 amps. WARNING • Wire sizes and connections comply with all applicable codes. Electrical Shock Hazard • Wiring is enclosed in approved conduit (if required by • Disconnect power before local codes).

  • Page 17: Installation Checklist

    INSTALLATION CHECKLIST Check Here Check Here Water Heater Location Vent Termination 1. Centrally located with the water piping system. Vertical Located as close to the gas piping and vent pipe 1. Vertical gas vents terminated with a listed cap or system as possible.

  • Page 18: Iv) Lighting & Operating Instructions

    IV) LIGHTING & OPERATING INSTRUCTIONS WARNING: If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life. A. This appliance is equipped with an ignition device which automatically lights the pilot. Do not try to light the pilot by hand.

  • Page 19: V) Operation

    V) OPERATION water heater until proper adjustments or repairs are made to the vent pipe system. Safety Shut-off This water heater is designed to automatically shut-off in the Water Temperature Regulation event of the following: WARNING: 1. The pilot flame is extinguished for any reason. Risk of scalding 2.

  • Page 20: Burner Flames

    Burner Flames 1. Normal expansion and contraction of metal parts during periods of heat-up and cool-down. Inspect the burner flames through the viewport and com- 2. Condensation causes sizzling and popping within the pare them to the drawings in Figure 15. A properly operat- burner area and should be considered normal.

  • Page 21: Water Or Steam Cleaning

    atmosphere, make sure air circulation around the integrated ance is likely to be cleaned with water or steam, the controls control and the gas valve is adequate to prevent condensa- and associated wiring should be covered so that water or tion.

  • Page 22: Reading Mode

    Reading mode The integrated control defaults to Reading mode after a through the available parameters. Once a parameter is reset. This mode is for information display only and no selected, the (HOTTER) and (COOLER) buttons are adjustments can be made to parameter settings. The dis- used to view the value of the selected parameter.
  • Page 23 CALL FOR START HEAT ACTIVE (Temperature low) STAGE 1 Damper energized. PREPURGE SPARK GENERATOR STAGE 2 POWERED TRIAL FOR IGNITION Pilot valve opens. PILOT BURNER OPERATION Pilot burner does not light. After retry delay system retries. If retries exceed maximum, timed lockout is entered. Pilot burner lights.

  • Page 24: Vii) Maintenance

    Temperature and Pressure Relief Valve VII) MAINTENANCE Draining and Flushing WARNING It is recommended that the tank be drained and flushed every 6 months to remove sediment which may buildup dur- ing operation. Note: Warranty is null and void in the event lime & scale deposits are allowed to exceed two inches in depth.

  • Page 25: Gas Valve Removal And Replacement

    as it will void any warranties, stated or implied. A special anode is available for this complaint. This rod may reduce but not eliminate water odour problems. The water supply system may require special filtration equipment from a water conditioning company to successfully eliminate all water odour problems.

  • Page 26: Ix) Troubleshooting Guide

    IX) TROUBLESHOOTING GUIDE Service Detection Remote Detect Conditions Alarm (ERROR) Name Control Action Suggestion (After Time Display Error Matured) Flame current lower FLAME_CURRENT Normal. Clean flame rod. Flame sensing FlameSenseCur than threshold. active. rentLow Damper END SW DAMPER_SW_CLOSE Wait until closed. Check END SW.
  • Page 27 Service Detection Remote Detect Conditions Alarm (ERROR) Name Control Action Suggestion (After Time Display Error Matured) Valve relays SLO_ELECTRONICS Soft lockout. Replace control. All time. SoftLockout shorted/open, other internal electronic failures Flame out of SLO_FLAME_SEQ Soft lockout. Check gas supply, During a SoftLockout sequence.

  • Page 28: X) Parts Reference Illustration

    X) PARTS REFERENCE ILLUSTRATION Part Name and Description Part Name and Description Drafthood Gas Valve Dip Tube (Top) Main Burner Orifice(s) Dip Tube (Front) (optional, not shown) Control Box Cover Dip Tube (Back) (optional, not shown) Transformer Flue Baffles Wiring Harness Cleanout Gasket Anode Rod(s) Cleanout Cover...

  • Page 29: Warranty

    GSW will not assume any expense or liability for unauthorized returns, nor repairs made by a person who has not been authorized by GSW or one of its authorized dealers. GSW Units/parts must be replaced with GSW or John Wood products to be eligible for Warranty.

This manual is also suitable for:

Signature jwsc seriesSignature ajwsc series

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