Instruction/ maintenance manual of the product AHCG3/HCG360T120 American Water Heater
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1 PLACE THESE INSTRUCTIONS ADJACENT TO HEA TER AND NOTIFY OWNER T O KEEP FOR FUTURE REFERENCE. PRINTED 0608 198154-000 HIGH EFFICIENCY AHCG3/HCG360T120 thru AHCG3/HCG3100T250 COMMERCIAL GAS W A TER HEA TER GAS-FIRED POWER BURNER FOR DOMESTIC HOT W A TER Thank you for buying this energy efcient water heater from American W ater Heaters.
2 These designs comply with the current version of the American National Standard for Gas Water Heaters, V olume III, ANSI Z21.10.3 / CSA 4.3 as an automatic circulating tank water heater , and automatic storage water heaters. Detailed installation diagrams are found in this manual.
3 DANGER THIS W A TER HEA TER IS EQUIPPED WITH AN ADJUST ABLE THERMOST A T TO CONTROL WA TER TEMPERA TURE. HOT WA TER TEMPERA TURES REQUIRED FOR AUTOMA TIC DISHWASHER AND LAUNDRY USE CAN CAUSE SCALD BURNS RESUL TING IN SERIOUS PERSONAL INJURY AND/OR DEA TH.
4 temperature be set for the lowest temperature which satises your hot water needs. This will also provide the most energy efcient operation of the water heater and minimize scale formation. SETTING THE WA TER HEA TER TEMPERA TURE A T 120°F/49°C WILL REDUCE THE RISK OF SCALDS.
5 LOCA TING THE HEA TER W ARNING THERE IS A RISK IN USING FUEL BURNING APPLIANCES SUCH AS GAS WA TER HEA TERS IN ROOMS, GARAGES OR OTHER AREAS WHERE GASOLINE, OTHER FLAMMABLE LIQUIDS OR ENGINE DRIVEN EQUIPMENT OR VEHICLES ARE STORED, OPERA TED OR REP AIRED.
6 If the conned space is within a building of tight construction, air for combustion and ven til at ion mus t be o bta ine d fr om o utd oor s. When dire ct ly co mm uni cat in g with the outdoors through vertical ducts, two permanent openings, located in the above manner , shall be provided.
7 For all side wall terminated, horizontally vented power vent, direct vent, and power direct vent gas fueled water heaters installed in every dwelling, building or structure used in whole or in part .
8 FIGURE 5a. U.S. POWER VENT CANADIAN POWER VENT FIGURE 5b. CAUTION TO PREVENT EXHAUSTING PRODUCTS FROM CIRCULA TING T O THE AIR INT AKE IN WINDY/COLD AREAS, THE MAXIMUM PRACTICAL DIST ANCE BETWEEN THESE TWO TERMINALS IS RECOMMENDED.
9 FIGURE 6a. U.S. DIRECT VENT CANADIAN DIRECT VENT FIGURE 6b. CAUTION TO PREVENT EXHAUSTING PRODUCTS FROM CIRCULA TING T O THE AIR INT AKE IN WINDY/COLD AREAS, THE MAXIMUM PRACTICAL DIST ANCE BETWEEN THESE TWO TERMINALS IS RECOMMENDED.
10 IMPORT ANT The vent system must terminate so that proper clearances are maintained as cited in local codes or the current editions of the National Fuel Gas Code, ANSI Z223.1/NFP A 54 or the Natural Gas and Propane Installation Code, CAN/CSA-B149.1.
11 5. Glue the intake vent terminal to the section of the pipe. 6. Slide the wall plate over the pipe to stop against intake vent terminal. 7. Place a bead of caulking (not supplied) around the gap between the pipe and the wall. Place some of the caulking on the back of the plate to hold it against the wall after installation.
12 Propane Installatio n Code which requ ires the vent syst em components be certied to ULC S636. This water heater has been design certied to be vented with PVC pipe certied and marked as complying with ULC S636. This water heater is supplied with a 2 inch 22.
13 LOW GAS PRESSURE SWITCH (SEE FIGURE 12) The Low Gas Switch (LGS) is a single-pole, normally open pressure switch that will close its contacts when a rising pressure of 5.0 in. (1.25Kpa) W .C. is encountered. The contacts will open when the pressure falls below the xed set point of 4.
14 W ARNING THE HEA TER IS NOT INTENDED FOR OPERA TION A T HIGHER THAN 10.5" (2.59 KPa) WA TER COLUMN SUPPL Y GAS PRESSURE. HIGHER GAS SUPPL Y PRESSURES REQUIRE SUPPLEMENT AL REDUCING SERVICE REGULA TION. EXPOSURE TO HIGHER GAS SUPPL Y PRESSURE MA Y CAUSE DAMAGE TO THE GAS CONTROLS WHICH COULD RESUL T IN FIRE OR EXPLOSION.
15 DISCONNECT THE APPLIANCE AND ITS MANUAL GAS SHUTOFF V AL VE FROM THE GAS SUPPL Y PIPING SYSTEM DURING ANY SUPPL Y PRESSURE TESTING EXCEEDING 1/2 PSIG (3.45Kpa). GAS SUPPL Y LINE MUST BE CAPPED WHEN DISCONNECTED FROM THE HEA TER. FOR TEST PRESSURES OF 1/2 PSIG (3.
16 CON DIT IO NER MUST BE INST ALLED IF THE ABO VE C OND ITI ONS EXI ST . MALFUNCTIONS CAUSED BY A POOR ELECTRICAL SUPPL Y ARE NOT COVERED UNDER YOUR W ARRANTY . The controller is wired to the heater as shown in Figure 15. The model and rating plate provides the electrical information needed to size the complete heater branch supply .
17 USING THE ELECTRONIC CONTROLLER 1. Overview Interaction with the water heater controller is done through an up, a down, and three operation buttons. These buttons are illustrated to the right. Operation of the three lower buttons is dened immediately above them on the screen.
18 3. Adjusting the Operating Set Point The Operating Set Point of this water heater determines the regulated temperature for the water in the tank. This parameter is adjusted in the T emperature menu.
19 4. Changing the Display Units The display interface to the heater has the option of selecting between de - grees Fahrenheit and degrees Celsius for temperature displays. This can be found in the “Display Settings” menu. Also in this menu, you may adjust how the backlight operates and the contrast of the LCD screen.
20 ACTION: T o get to the current fault information screen, press Menu. DISPLA Y : ACTION: Press the DOWN button to highlight "current Fault" and press Select.
21 5. Check the vent system seams and joints and ensure that there is no discharge of ue products into the room. 6. Check the input rate. For appliance installation locations with elevations above 6500 feet (1982 meters) refer to HIGH AL TITUDE INST ALLA TIONS section of this manual.
22 W ARNING UNDER NO CIRCUMS T ANCES SHOULD THE INP UT EXCEE D THE RA TE SHOWN ON THE HEA TER RA TING PLA TE. OVER FIRING COULD RESUL T IN DAMAGE OR SOOTING OF THE HEA TER.
23 FOR YOUR SAFETY READ BEFORE OPERA TING W ARNING: If you do not follow these instructions exactly , a re or explosion may result causing property damage, personal injury or loss of life.
24 FOR YOUR SAFETY READ BEFORE OPERA TING W ARNING: If you do not follow these instructions exactly , a fire or explosion may result causing property damage, personal injury or loss of life.
25 AHCG3/HCG3100T199 & AHCG3/HCG3100T250 MODELS ONL Y . OPERA TING INSTRUCTIONS TURN OFF GAS TO APPLIANCE FOR YOUR SAFETY READ BEFORE OPERA TING W ARNING: If you do not follow these instructions exactly , a re or explosion may result causing property damage, personal injury or loss of life.
26 FIGURE 16. T o dissolve and remove the more stubborn mineral deposits, manufacturer's UN•LIME® Professional Delimer should be used. The manufacturer's UN•LIME® Professional Delimer is an easy to handle patented food grade acid formulated specically for lime scale removal from all types of water using equipment.
27 DRAIN V AL VE AND ACCESS P ANELS The heaters are equipped with a 3/4" drain valve. An access panel covers the cleanout opening in the tank which is sealed by a gasket and cover , gure 25. RELIEF V AL VE At least twice a year , the temperature and pressure relief valve should be checked to ensure that it is in operating condition.
28 ONE TEMPERA TURE - ONE HEA TER HORIZONT AL ST ORAGE T ANK FORCED CIRCULA TION WITH OR WITHOUT BUILDING RECIRCULA TION DANGER TEMPERA TURE SETTING SHOULD NOT EXCEED SAFE TEMPERA TURE A T FIXTURES. SEE WA TER TEMPERA TURE CONTROL WARNING ON P AGE 4 .
29 * PIPE RELIEF V AL VE T O OPEN DRAIN. NOTE: I F T E M P E R E D W A T E R I S RECIRCULA TED, RETURN LINE SHOULD BE CONNECTED A T POINT “A”. INST ALL IN ACCORDANCE WITH LOCAL CODES.
30 TWO TEMPERA TURE - TWO HEA TERS HIGH TEMPERA TURE WITH OR WITHOUT BUILDING RECIRCULA TION TWO TEMPERA TURE - THREE HEA TERS (TWO PRE-HEA TERS/ONE BOOSTER HEA TER) WITH OR WITHOUT BUILDING RECIRCULA TION MUST BE IDENTICAL HEA TERS FOR MUL TIPLE HEA TER INST ALLA TION SEE MANIFOLD KIT SPECIFICA TIONS, P AGE 33.
31 * PIPE RELIEF V AL VE TO OPEN DRAIN ** 140°F (60°C) TO 150°F (66°C) SHOULD BE MAXIMUM WA TER TEMPERA TURE MAINT AINED IN THE PRE-HEA TERS. 120°F (49°C) SHOULD BE THE MINIMUM TEMPERATURE OF WATER IN THE PRE- HEATERS. CONNECT CIRCULA TING LINE FROM FIXTURES, IF USED, TO COLD W A TER SUPPL Y LINE OF PRE-HEA TER.
32 NOTE 1: TOGGLE SWITCH CONTROLS 180°F (82°C) WA TER CIRCULA TION. INST ALL ON OR CLOSE TO DISHWASHER. TOGGLE SWITCH MUST BE CLOSED (ON) DURING THE RINSE OPERA TION AND OPEN (OFF) WHEN DISHW ASHER IS NOT OPERA TING OR WHEN ON LONG ST ANDBY .
33 MANIFOLD KITS Precision cut type “L” all copper manifold kits assure water ow balance of all units. Without this balance, the full water heating and storage potential of the system cannot be achieved. Plus, the units with the higher water ow may have a shortened life.
34 CHECKLIST AND SER VICE INFORMA TION IMPORT ANT The installer may be able to observe and correct certain problems which might arise when the unit is put into operation or when it is re-fired after a prolonged shutdown. HOWEVER, it is recommended that only qualified servicemen, using appropriate test equipment, be allowed to service the heater .
35 MOTOR WILL NOT RUN 1. Conrm 120V AC to the controller . Also, to verify correct polarity , check for 120 V AC between hot supply and ground. If there is no voltage, check for a loose connection where it connects to the controller . 2. If there is 120 volts to the controller, check for loose connections or a locked rotor .
36 Commercial Limited W arranty American W ater Heater Company , the warrantor , extends the following LIMITED W ARRANTY to the owner of this water heater .
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40 PO Box 1597, 500 Princeton Road Johnson City , TN 37605 Phone: 1-800-456-9805 www .americanwaterheater .com.
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