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American Water Heater GAS-FIRED COMMERCIAL WATER HEATER - page 1
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. Follow the gas supplier's instructions. • If you cannot reach your gas sup ...
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American Water Heater GAS-FIRED COMMERCIAL WATER HEATER - page 2
2 TABLE OF CONTENTS page GENERAL INFORMATION ............................................................ 3 INSTALLATION. ............................................................................ 5 Locating The Water Heater .................................................... 5 Minimum Clearances ................................................. ...
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American Water Heater GAS-FIRED COMMERCIAL WATER HEATER - page 3
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., Arlington, VA 22209. The warranty for this water heater is in ...
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American Water Heater GAS-FIRED COMMERCIAL WATER HEATER - page 4
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. IMPORTANT Before proceeding, please inspect the water heater and components for ...
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American Water Heater GAS-FIRED COMMERCIAL WATER HEATER - page 5
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. The location of this water heater is of the utmost importance. Before installing this wate ...
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American Water Heater GAS-FIRED COMMERCIAL WATER HEATER - page 6
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. Examples of some typical compounds that are potentially co rrosive are: spray can propellants, cleaning solvents, refrigerator and air conditioning refrigerants, swimming pool c ...
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American Water Heater GAS-FIRED COMMERCIAL WATER HEATER - page 7
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. This water heater must be located in an area where leakage of ...
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American Water Heater GAS-FIRED COMMERCIAL WATER HEATER - page 8
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. ...
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American Water Heater GAS-FIRED COMMERCIAL WATER HEATER - page 9
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 56.38 4.56 23 6 2 6 20 100 250,000 225,000 74.88 65.19 56.38 4.56 23 6 2 6 20 100 270,000 250,000 7 ...
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American Water Heater GAS-FIRED COMMERCIAL WATER HEATER - page 10
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 64.38 54.13 8 6 6 20 75 300,000 72.00 64.38 54.13 7 6 7 20 80 425,000 81.00 75.38 64.25 10 6 6 20 80 5 ...
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American Water Heater GAS-FIRED COMMERCIAL WATER HEATER - page 11
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 54.13 8 6 6 20 75 300,000 74.63 64.38 54.13 7 6 7 20 80 425,000 83.50 75.38 64.25 10 6 6 20 80 505 ...
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American Water Heater GAS-FIRED COMMERCIAL WATER HEATER - page 12
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 66.25 64.38 56.00 55.13 2 6 20 80 250,000 (235,000 LP) 70.13 66.25 64.38 56.00 55. ...
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American Water Heater GAS-FIRED COMMERCIAL WATER HEATER - page 13
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) 71.88 66.25 64.38 56.00 55.13 2 6 20 80 250,000 (235,000 LP) 71.88 66.25 64.38 56.00 55.13 ...
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American Water Heater GAS-FIRED COMMERCIAL WATER HEATER - page 14
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. This water heater must be connected to a masonry chimney or ...
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American Water Heater GAS-FIRED COMMERCIAL WATER HEATER - page 15
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). 6. The Lighting and Operating instruct ions are outlined beginning on page 25. The damper must be in the open position when the water heater main burner is operating (the arrow on the damper p ...
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American Water Heater GAS-FIRED COMMERCIAL WATER HEATER - page 16
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. Such a condition often will result in a yellow, luminous burner flames, causing carboning or sooting of the burners and flue tubes with possible damage ...
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American Water Heater GAS-FIRED COMMERCIAL WATER HEATER - page 17
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 /0.59kW) per hour of the total ra ting of all gas appliances in the enclosure. 3. If the openings communicate directly with the outdoors or through vertical ducts with the outdoors, each opening sh ...
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American Water Heater GAS-FIRED COMMERCIAL WATER HEATER - page 18
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. After the pressure has been relieved, close the faucet. The COLD wa ...
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American Water Heater GAS-FIRED COMMERCIAL WATER HEATER - page 19
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 pressure relief valve certified by a nationally recognized testing laboratory that maintains periodic inspection of production of listed equipment or ma ...
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American Water Heater GAS-FIRED COMMERCIAL WATER HEATER - page 20
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. By setti ng the thermostat on this water heater to obtain the increased temperature wat ...
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American Water Heater GAS-FIRED COMMERCIAL WATER HEATER - page 21
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 (1.0) inch (0.2 ...
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American Water Heater GAS-FIRED COMMERCIAL WATER HEATER - page 22
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. 3. Open several hot water faucets to allow air to escape from the system. 4. When a steady ...
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American Water Heater GAS-FIRED COMMERCIAL WATER HEATER - page 23
23 General Operation (Spa rk Ignition Wiring Diagram) continued- Index ...
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American Water Heater GAS-FIRED COMMERCIAL WATER HEATER - page 24
24 Lighting And Shutdown Instructions Index ...
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American Water Heater GAS-FIRED COMMERCIAL WATER HEATER - page 25
25 Standard Pilot Models General Opera tion (Lighting and Shutdown) continued- Index ...
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American Water Heater GAS-FIRED COMMERCIAL WATER HEATER - page 26
26 Spark Ignition Models General Opera tion continued- Index ...
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American Water Heater GAS-FIRED COMMERCIAL WATER HEATER - page 27
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. For energy- efficient operation of your water heat er, the suggested ini ...
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American Water Heater GAS-FIRED COMMERCIAL WATER HEATER - page 28
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). Should the ECO function (open), the water temperature should be reduced to approximately 120°F (49°C) ...
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American Water Heater GAS-FIRED COMMERCIAL WATER HEATER - page 29
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 . The burner flames should be blue with yellow tips. A ...
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American Water Heater GAS-FIRED COMMERCIAL WATER HEATER - page 30
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. Regular inspection and maintenance of the water heate ...
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American Water Heater GAS-FIRED COMMERCIAL WATER HEATER - page 31
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. NOTE: It is imperative for proper operation of the water heater that the main bu ...
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American Water Heater GAS-FIRED COMMERCIAL WATER HEATER - page 32
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. READ THE WARRANTY FOR A FULL EXPLANATION OF THE LENGTH OF T ...
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American Water Heater GAS-FIRED COMMERCIAL WATER HEATER - page 33
33 Operating and Troubleshooting Guide - Sequence of Normal Operation (Electronic Thermostat with Intermittent Pilot Ignition) Index ...
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American Water Heater GAS-FIRED COMMERCIAL WATER HEATER - page 34
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. 2. On flue damper models, the damper reaches then full open position, the end sw ...
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American Water Heater GAS-FIRED COMMERCIAL WATER HEATER - page 35
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. Check for loose, broken or shorted wires. Replace sensing bulb(s) if necessary. Sensors ...
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American Water Heater GAS-FIRED COMMERCIAL WATER HEATER - page 36
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. If damper still does not open check for 24 volts betw ...
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American Water Heater GAS-FIRED COMMERCIAL WATER HEATER - page 37
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. measure resistance of sensor(s) with ohmmeter. Is resistance between 700 and 3 ...
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American Water Heater GAS-FIRED COMMERCIAL WATER HEATER - page 38
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 13477 13140 12812 12494 12185 70 11884 11592 11308 11032 10763 10502 10248 10000 9760 9526 80 9299 9078 8862 8653 8449 8250 8057 7869 7685 7507 90 7333 ...
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American Water Heater GAS-FIRED COMMERCIAL WATER HEATER - page 39
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. Manual S hut Off Valve (Applicable Model) 6. Cleanout Cover 27. Wire Harness-Lower Senso ...
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American Water Heater GAS-FIRED COMMERCIAL WATER HEATER - page 40
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. 3. This water ...
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American Water Heater GAS-FIRED COMMERCIAL WATER HEATER - page 41
41 Suggested Piping Arrangement For Top Connections Suggested Piping Arrangement For Side Connections (If Applicable) Index ...
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American Water Heater GAS-FIRED COMMERCIAL WATER HEATER - page 42
42 NOTES Index ...
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American Water Heater GAS-FIRED COMMERCIAL WATER HEATER - page 43
43 NOTES ...
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American Water Heater GAS-FIRED COMMERCIAL WATER HEATER - page 44
44 NOTES ...
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