MODELS: ULN 75-76, 100-83, 100-76 ULN 75-76R, 100-83R, 100-76R RU 75-76, 100-83, 100-76 operating, installation and service manual Commercial Gas Water Heater 561 New York Drive, Pomona • CA 91768 1(800) 900-9063 • (909) 392-0230 • Fax (909) 392-7302 REV.
OPERATING, INSTALLATION AND SERVICE MANUAL STORAGE TYPE GAS WATER HEATER WITH FLUE DAMPER AND ELECTRIC IGNITION SYSTEM WITHOUT FAN MOTOR DANGER Keep flammable products: REQUIRES 120V A.C. POWER SUPPLY WARNING: If the information in these instructions is not followed exactly, a fire or explosion may result causing property damage, personal injury or death. -Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.
WARNING Read and understand instruction manual and safety messages before installing, operating or servicing this water heater Failure to follow instructions and safety messages could result in death or serious injury. WARNING For continued protection against risk of fire: WARNINGS A . Do not install water heater on carpeted floor. . Do not operate water heater if flood damaged.
WARRANTY LIMITATIONS THE MANUFACTURER OF THIS WATER HEATER WILL NOT BE RESPONSIBLE FOR TANK FAILURES OR WATER HEATER FAILURES RESULTING FROM ANY OF THE FOLLOWING CONDITIONS AND MAY AT IT’S DISCRETIONS VOID THE WATER HEATER WARRANTY WHEN THESE CONDITIONS RESULT IN PREMATURE FAILURES OF THE TANK OR COMPONENTS 1. INSTALLATIONS NOT COMPLYING WITH ALL LOCAL CODES. 2. FAILURES DUE TO UNDERSIZING OF THE WATER HEATER AND SUBSEQUENT EXCESSIVE BURNER FIRING. 3.
IMPORTANT BEFORE PROCEEDING WITH THE INSTALLATION OF THIS WATER HEATER, READ AND THOROUGHLY UNDERSTAND THESE INSTALLATION AND OPERATION INSTRUCTIONS. IF THERE ARE ANY QUESTIONS, THIS INSTALLATION SHOULD BE PERFORMED BY A QUALIFIED SERVICE PERSON. GENERAL INSPECT SHIPMENT: Inspect water heater for possible damage. If damaged, notify carrier immediately. Check markings on rating plate to make certain it corresponds with your application.
Combustion and Ventilation Air- Provisions must be made for adequate combustion and ventilation air. Details outlining proper air supply for various types of installation are prescribed by the National Fuel Gas Code (ANSI Z-223.1/ NFPA 54) latest edition. If the water heater is installed in unconfined space within the building, infiltration air may be adequate for proper combustion and ventilation. Buildings of tight construction (weather stripping, caulked, etc.) require additional air from outdoors.
Draft Diverter- This water heater has been shipped with a draft diverter for which it was designed with reference to the horizontal and vertical planes. If removed, the draft diverter shall be replaced in the same position and secured to the jacket top by the screws with which it was installed. Vent Piping- This water heater must be connected to a masonry chimney or venting system approved by local codes or ordinances.
SINGLE COMMERCIAL GAS MODEL TOP CONNECTIONS WITH RETURN CIRCULATION TYPICAL INSTALLATION Hot Water Service Sheet Metal Screws Vent STORAGE TANK Vent Connector Min 1/4” in rise per linear feet Bleed valve Return Line from service (When Used) Shut off valve T & P Relief Valve 150 PSI System return PUMP Hot Water Outlet Hand Hole Clean Out Rating Plate Cold Water Inlet Thermostat Shut off valve Check Valve Shut-Off Valve Manual Shut Off Valve Back flow preventers Hot water Shut off valve
AIR SUPPLY ALL AIR FROM OUTDOORS Important air for combustion and ventilation must not come from a corrosive atmosphere. Any failure due to corrosive elements in the atmosphere is excluded from warranty coverage. The confined space shall be provided with two permanent openings, one commencing within 12 inches of the top and one commencing within 12 inches of the bottom of the enclosure.
NOTE: If the equipment room is located against an outside wall and the air openings communicate directly with the outdoors, each opening shall have a free area of not less than one square inch per 4,000 BTU per hour of the total input rating of all equipment in the enclosure. Illustration for Figures 6-9 copyright by the American Gas Association. Used by permission of the copyright holder. After completing all gas connections, check each gas connection and fitting for leaks.
INSTALLATION (Using Top Connect Only) TEMPERATURE AND PRESSURE RELIEF VALVE For protection against excessive pressures and/or temperatures, a temperature and pressure relief valve must be installed in the opening marked "temperature and pressure relief valve".
ELECTRICAL INSTALLATION CHECK LIST 120 VAC LESS THAN 5 AMPS Before putting burner in operation This is presented for ease of reference. It is not comprehensive. All instructions and warnings must be read and adhered to When installed, this appliance must be electrically grounded in accordance with local codes or in the abscence of local codes, with the National Electrical Code, ANSI/NFPA NO. 70-Latest Edition and Canadian Electrical Code CSA #22.2.
DAMPER WIRING DIAGRAM 3 1 DAMPER OPERATION SEQUENCE POTENTIOMETER 4 2 L2 DISCONNECT R B B UPPER BK W R Y R B B 24V (GND) RELAY Y NO R BK W SPARK 5 SENSE 4 24V 3 TH-V (OPT) 2 24V (GND) MV/PV 1 PV (GND) (BURNER) MV IGNITION CONTROL HONEYWELL S8600C 6 7 8 9 Y R Y B LEGEND DM Damper Motor F Fuse TH Thermostat ES Endswitch CM Control Module R Relay Coil R1 N/C Relay Contact R2 N/O Relay Contact SS1 N/C Safety Switch Contact SS2 N/O Safety Switch Contact SERVICE SWITCH 2
NATURAL GAS MODELS IF YOU SMELL GAS: 1.- Open windows. 2.- Get all people out of the building. 3.- DO NOT light matches. 4.- DO NOT touch electrical switches (on or off). 5.- Extinguish any open flames. 6.- Use an outside phone and immediately call the gas company and the fire department. Ask for instructions. Before hanging up, give your name and address. 7.- DO NOT go back into the building. If help is coming, wait for it outside of the building. L.P.
COMBINATION SPACE HEATING /POTABLE WATER HEATING SYSTEM When using this heater as a source of heat for a combination space heating/potable water heating system, be sure to follow manual(s) shipped with air handler system. Refer to figure 18 page 32. Note the following warnings: Toxic chemicals, such as those used for boiler treatment, shall NEVER be introduced into this system.
TO TURN OFF GAS TO APPLIANCE GAS PRESSURE 1.Set the thermostat to lowest setting. 2.Turn off all electrical power to the appliance if service is to be performed. 3.Turn the gas valve knob clockwise to “OFF” position.
PILOT AND MAIN BURNER COMMON COMPLAINTS FOLLOWING IS A LIST OF THE MOST COMMON COMPLAINTS RELATED TO THE USE OF WATER HEATERS. MANY COMPLAINTS ARE DUE TO ITEMS NOT DIRECTLY RELATED TO THE WATER HEATER. DO NOT ATTEMPT TO SERVICE THE WATER HEATER OR PERFORM OTHER RECOMMENDATIONS ON THIS LIST UNLESS YOU ARE TRAINED AND QUALIFIED TO DO SO.
REPLACEMENT PARTS LIST (SEE FIGURE 17) CONDITION High operating costs Insufficient hot water Slow water recovery Drip from relief valve Thermostat fails to close CAUSE Improper calibration Replace control valve Thermostat set too high Turn temperature knob to desired temperature Sediment or lime in tank Clean out sediment; Refer to page 22 Heater too small for job Install adequate heater Leaking faucets Repair faucets Gas leaks Check with utility - repair at once Wasted hot water Advice cu
COMBINATION SPACE HEATING / POTABLE WATER HEATING SYSTEM REPLACEMENT PARTS ILLUSTRATION 1 2 23 3 24 4 22 WATER (POTABLE) HEATING AND SPACE HEATING 5 21 20 NON-SCALD TEMPERING VALVE 19 COLD WATER INLET 18 SUGGESTED PIPING ARRANGEMENT FOR TOP CONNECTIONS 17 6 23 TEMPERED POTABLE WATER 16 15 14 7-7a 8 RETURN FROM HEAT EXCHANGER 13 12 9 11 10 STANDARD MODEL SHOWN Figure 18 Figure 17 31 32
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