Instruction/ maintenance manual of the product GAS-FIRED COMMERCIAL WATER HEATER American Water Heater
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238-39387-00H REV 7/00 GAS-FIRED COMMERCIAL WATER HEATER 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.
2 TABLE OF CONTENTS page GENERAL INFORMATION ............................................................ 3 INSTALLATION. ............................................................................ 5 Locating The Water Heater ........................
3 GENERAL INFORMATION This gas-fired water heater is desi gn certified by the American Gas Association Laboratories under the app licable American National Standard, Z21.10.1 or Z21.10.3 (as indicated on t he rating plate), available from the American Gas Association, 1515 Wilson Blvd.
4 CAUTION Incorrect operation of this appliance may create a hazard to life and property and will nullify the w arranty. DANGER Do not store or use gasoline or other flammable, combustible, or corrosive vapors and liquids in the v icinity of this or any other appliance.
5 INSTALLATION Locating The Water Heater This w ater heater shall NOT be installed in any location where gasoline or flammable vapors are likely to be present, unless the installation is such to eliminate the probable ignition of gasoline or flammable vapors.
6 Installation (Locating The Water Heater) c ontinued - Water heater corrosion and component failure can be caused by the heating and breakdown of airborne chemical vapors.
7 Installation (Locating The Water Heater ) continued- Proper venting practices must be considered when selecting a location for this water heater. For exact venting specifications, please consult the Venting section, located on page 10, of these In stallation and Operating Instructions.
8 Installation continued- Minimum Clearances WARNING Failure to adhere to these installation and operating instructions may create a hazard to life and property and will nullify the w arranty. This installation shall allow access to the front of the water heater and adequate clearance shall be provided for servicing and operating this water heater.
9 Figure 1 Non-Flue Damper Models and Flue Damper Models Model Description Clearances * Capacity Input (BTU/hr) A (in) B (in) C (in) D (in) E (in) F (in) Sides and Rear Flue or Vent (in) Ceiling (in) (GAL) Nat. LP (in) 100 199,999 199,999 74.88 65.19 56.
10 Figure 2 Non-Flue Damper Models Model Designation Clearances * Capacity Input A B C D Sides and Flue or Ceiling (GAL) (BTU/hr) (in.) (in.) (in.) (in.) Rear (in.) Vent (in.) (in.) 65 370,000 71.38 64.38 54.13 8 6 6 20 65 399,999 (NAT ONLY) 71.38 64.
11 Flue Damper Models (Figure 2) Model Designation Clearances * Capacity Input A B C D Sides and Flue or Ceiling (GAL) (BTU/hr) (in.) (in.) (in.) (in.) Rear (in.) Vent (in.) (in.) 65 370,000 73.38 64.38 54.13 8 6 6 20 65 399,999 (NAT ONLY) 73.38 64.38 54.
12 Figure 4 Non-Flue Damper Models Model Designation Clearances * Capacity Input A B C D E Sides and Flue or Ceiling (GAL) (BTU/hr) (in.) (in.) (in.) (in.) (in.) Rear (in.) Vent (in.) (in.) 80 180,000 70.13 66.25 64.38 56.00 55.13 2 6 20 80 199,999 (235,000 LP) 70.
13 Flue Damper Models (Figure 4) Model Designation Clearances * Capacity Input A B C D E Sides and Flue or Ceiling (GAL) (BTU/HR) (in.) (in.) (in.) (in.) (in.) Rear (in.) Vent (in.) (in.) 80 180,000 71.88 66.25 64.38 56.00 55.13 2 6 20 80 199,999 (235,000 LP) 71.
14 Venting 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.
15 5. Connect the damper wiring plug to t he connector on the side of the water heater. Note: The plug and connector can only be engaged one way (polarized).
16 Provide adequate air for combustion and vent ilation. An insufficient supply of air will cause recirculation of combustion products resulting in air contamination that may be hazardous to lif e.
17 2. If the openings communicate with the outdoors through horizontal ducts, each opening shall have a minimum free area of 1 in. 2 /2000 BTU (2.54cm 2 /0.
18 Note: BEFORE PROCEEDING WITH THE INSTALLATION, CLOSE THE MAIN WATER SUPPLY VALVE. After shutting off the main water supply, open a faucet to relieve the water line pressure to prevent any water from leaking out of the pipes while making the water connections to the water heater.
19 WARNING For protection against excessive temperatures and pressure, install temperature and pressure protective equipment required by local codes, but not less than a combination temperature and pr.
20 This water heater can deliver scalding te mperature water at any faucet in the system. Be careful whenever using hot water to avoid scalding injury. Certain appliances such as dishwashers and aut omatic clothes washers may require increased temperature water.
21 The gas supply lines must meet all requirements of the National Fuel Gas Code (ANSI Z223.1-Latest Edition), or in Canada CAN/CGA B149.1 Natural Gas Installation Code (Latest Edition) or CAN/CGA B149.2 Propane Installation Code (Latest Edition). The minimum permissible gas supply pressure for the purpose of input adjustment is one (1.
22 TO FILL THE WATER HEATER 1. Close the water heater drain valve by turning the knob clockwise. If alternative water connections are pr ovided but not used, make certain they are plugged (i.e. rear connections). 2. Open the cold water supply shut-off valve.
23 General Operation (Spa rk Ignition Wiring Diagram) continued- Index.
24 Lighting And Shutdown Instructions Index.
25 Standard Pilot Models General Opera tion (Lighting and Shutdown) continued- Index.
26 Spark Ignition Models General Opera tion continued- Index.
27 Temperature Adjustment The temperature selector knob of t he thermostat has been adjusted to its lowest setting when shipped from the factory. The detent on the thermostat temper ature scale (shown below) is the preferred starting point for setting t he temperature control.
28 General Operation (Te mperature Adjustment) continue d- An automatic gas shut-off device (ECO) is incorporated in the thermostat which will shut off all gas supply to the burner and pilot if the water heater temperature exceeds 200°F (93°C).
29 General Opera tion continued- Burner Flame Check At the time of installation and at peri odic intervals (about every 3 months), a visual check of the pilot and burner flames should be made to determine if they are burning properly. No adjustment to the air shutter is required for this heater .
30 MAINTENANCE The following maintenance should be performed by a qualified service technician at the minimum periodic intervals suggested below. In some installations, the maintenance interval may be more frequent depending on the amount of use and the operating condi tions of the water heater.
31 5. Annually remove the main burner rack assembly to clean orifices and related parts of any dirt or other fore ign material. Inspect the burner ports for obstructions or debris and clean with a wire brush, vacuum, or use a mild detergent solution to clean as needed.
32 Maintenance (continue d)- Contact your supplier, plumbing profe ssional or contact the company at the address given on the rating plate of the water heater for replacement parts. Provide the part name as well as the m odel and serial number(s) of the water heater(s) when ordering parts.
33 Operating and Troubleshooting Guide - Sequence of Normal Operation (Electronic Thermostat with Intermittent Pilot Ignition) Index.
34 1. The electronic thermostat controls the 24-volt circuit to the ignition control. When the thermostat contacts close, a 24-volt circuit is completed from the transformer through the thermostat rela y to the ignition control module to initiate the ignition sequence.
35 Test or Condition: Result: Action Taken: Start - Disconnect sensor leads from electronic control module and measure resistance of sensor(s) with ohmmeter Is resistance between 700 and 30K ohms (see page 38)? YES ↓ NO → Sensor(s) may be shortened or open.
36 Test or Condition: Result: Action Taken: Are burners operating? If pilot does not light and pilot is not sparking, check to make sure flue damper is in the full open position. Damper opens? YES ↓ NO → Check flue damper wiring. Check for 24 volts at yellow w i re from thermostat to damper.
37 thermostat board, and the heater operates if this wire is jumpered to the “COM” terminal above it, then make the following checks to the thermostat circuit. This procedure also applies if the burners cycle on for short periods, but the water temperature seems low.
38 In Degrees F °F 0 1 2 3 4 5 6 7 8 9 40 26109 25400 24712 24045 23399 22771 22163 21573 21000 20445 50 19906 19383 18876 18383 17905 17440 16990 16553 16128 15715 60 15314 14925 14548 14180 13823 1.
39 PART NA ME AND DESCRIPTION 1. Drafthood 22. Wire Harness-Damper/Upper Sensor (S.I.) 2. Diptube 23. Flue Damper (Spark Ignition Models) 3. Flue Baffle 24. Anode Rod (Not Pictured) 4. Cleanout Access (Jacket) Cover 25. Tank Leg Thermal Break 5. Drain Valve 26.
40 GAS WATER HEATERS SUITABLE FOR WATER (POTABLE) HEATING AND SPACE HEATING 1. All piping components connected to this water heater for space heating applications must be suitable for use with potable water. 2. Toxic chemicals, such as those used for boiler treatment, shall not be introduced into potable water used for space heating.
41 Suggested Piping Arrangement For Top Connections Suggested Piping Arrangement For Side Connections (If Applicable) Index.
42 NOTES Index.
43 NOTES.
44 NOTES.
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