American Water Heater DCG manual

T o obt ain technical, warranty or service assist ance during or af ter the inst allation of this water heater , call toll free: 1-800-456-9805 When calling for assist ance, please have the following information ready: 1. Model number 2. 7 digit product number 3. Serial number 4. Date of inst allation 5. Place of purchase T able of Contents . . . .[...]

2 T able of Content s W ater Heater Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Inst allation Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5 Unp acking the W ater Heater . . . . . . . . . . . . . . . . . . . . . . 3 Inst allation Requirement s . . . . . . . . . . . . . . . . . . .[...]

3 INST ALLA TION INSTRUCTIONS Consumer Information This water heater is design-certified by CSA International as a Category I, non-direct vented water heater which t akes it s combustion air either from the inst allation area or from air ducted to the unit from the out side. This water heater must be inst alled according to all local and st ate cod[...]

4 Va po rs f rom fla m ma ble liq uid s w ill ex plo de and ca tc h fir e c aus ing de ath or se ver e b urn s. Do no t u se or s tor e fl am ma ble pro du cts su ch as ga soli ne, so lven ts or a dh es ive s in t he sa me roo m or are a n ear the w ater he ate r. Ke ep fla mm ab le p rod uc ts: 1. fa r aw a y fr om he ater 2. in ap pro ved co nta [...]

5 Clearances and Accessibility Notice: Minimum clearances from combustible materials are st ated on the dat a plate located on the front of the water heater . • If the water heater is inst alled in a rest aurant or food service location where the floor is cleaned frequently , NSF International requires the water heater to maint ain 6 inches (150m[...]

6 COMBUSTION/VENT PIPE SYSTEM Combustion Combustion air must be free of acid-forming chemicals. These chemicals are found in aerosol sprays, deter- gent s, bleaches, cleaning solvent s, air freshener , p aint and varnish removers, refrigerant, and many other com- mercial product s. When burned, vapors from these product s form highly corrosive acid[...]

7 Air Requirement s For buildings that are not well sealed (do not have tight fitting doors and windows) natural air infiltration may provide suf ficient air required for combustion and venti- lation. For buildings using tight construction (newer and renovated structures), the air supply shall be introduced from the out doors, regardless of whether[...]

Figure: 2 Equipment Location and Combustion/V entilation Air Requirement s Combustion Air Duct Permanent Vent ilat ion Air 12” Grade 12” Outdoor Air Ducts Vent ing Combustion Inlet Air Ducts Outlet Air (a) (b) (d) (c) 8 Air Opening Requirement s (a) EQUIPMENT LOCA TED IN CONFINED SP ACES; ALL AIR FROM INSIDE THE BUILDING . T wo permanent openin[...]

9 9 Draf t Hood/Damper Inst allation Flue Outlet Reducer Some unit s are shipped with a flue outlet reducer (See Figure 3B). Use only the flue outlet reducer supplied with this unit. The flue outlet reducer should be connected to the top of the flue damper and sealed by high temperature silicon. The vent pipe must be inst alled according to all loc[...]

10 W A TER SYSTEM PIPING T empering V alve Inst allation A T empering V alve should be inst alled per the manufac- turer ’ s instructions in the hot water line. See Figure 5 (below) for sample tempering valve inst allation. Piping Inst allation Piping, fittings, and valves should be inst alled according to the inst allation drawing (Figure 4). If[...]

Thermometer Temperatu re and Pressure Re lief Valve Temperatu re and Pressu re Relief Va lve Storage Tank Heater 1 1/2” Cold water suppl y Hot Wa ter Outlet Thermal Expansion Tank Pressure Reducing Valve Check Valve Circulating Pump Plug Cock Shut-off valve Shut-off valve Shut-off valve Thermometer Temperature and Pressure Relief Valve Hot Water [...]

12 Figure 8: Commercial Unit with Auxiliary S torage Heater - Forced Circulation W ith or W ithout Building Recirculation - T op Inlet/Outlet Connections Closed System/Thermal Exp ansion Periodic discharge of the temperature and pressure relief valve may be due to thermal exp ansion in a closed water supply system. The water utility supply meter ma[...]

13 13 T emperature and Pressure Relief V alve For protection against excessive pressures and temperatures, a temperature and pressure relief valve must be inst alled in the opening marked “T & P RELIEF V AL VE” (See Figure 9). This valve must be design certified by a nationally recognized testing laboratory that maint ains periodic inspecti[...]

14 GAS SUPPL Y AND PIPING Gas Requirement s Read the dat a plate to be sure the water heater is made for the type of gas being used. This information will be found on the dat a plate located on the front of the water heater . If the information does not agree with the type of gas available, do not inst all or operate the water heater . Call your de[...]

15 15 Gas Pressure T esting Import ant: This water heater and it s gas connection must be leak tested before placing the appliance in operation. • If the code requires the gas lines to be tested at a pressure of 14” W .C. or greater , the water heater and it s manual shut-of f valve must be disconnected from the gas supply piping system and the[...]

16 If you lack the necessary skills required to properly inst all the electrical wiring to this water heater , do not proceed but have a qualified service technician perform the inst allation. When making the electrical connections, always make sure: • The volt age and frequency correspond to that specified on the water heater dat a plate on the [...]

17 17 WIRING DIAGRAM Index[...]

18 INST ALLA TION CHECKLIST W ater Heater Location Requirement s • Centrally located with the water piping system. Located as close to the gas piping and vent pipe system as possible. • Located indoors and in a vertical position. Protected from freezing temperatures. • Proper clearances from combustible surfaces maint ained and not inst alled[...]

19 19 OPERA TING YOUR W A TER HEA TER Read and underst and these directions thoroughly before attempting to operate the water heater (see Lighting Instructions on p age 20). Check the dat a plate on the front of the water heater for the correct gas. Do not use this water heater with any gas other than the one listed on the dat a plate. If you have [...]

20 The thermost at is adjusted to it s lowest temperature setting when it is shipped from the factory . W ater tem- perature can be regulated by moving the temperature dial to the preferred setting. The preferred st arting point is 120°F (49 °C ) . Import ant: Since most commercial inst allations utilize higher temperatures, the use of a temperin[...]

21 21 Burn Hazard Do not touch vent. Doing so can result in burns. Checking the Draf t Af ter successfully lighting the water heater , allow the unit to operate for 15 minutes and check the draf thood relief opening for proper draf t. Pass a match flame around the relief opening of the draf thood (See Figure 14). A steady flame drawn into the openi[...]

22 MAINTENANCE OF YOUR W A TER HEA TER Draining and Flushing It is recommended that the t ank be drained and flushed every 6 months to remove sediment which may buildup during operation. Note: W arranty is null and void in the event lime & scale deposit s are allowed to exceed two inches in depth. The water heater should be drained if being shu[...]

23 23 6. When replacing the gas valve, use an approved T eflon® or pipe joint compound on the pipe threads. 7. Screw the new gas valve onto the burner assembly . 8. Reconnect the pilot tube to the gas valve. 9. Reconnect the main gas line to the gas valve. 10. T urn the gas supply on and check for leaks. Use a chlorine-free soap and water solution[...]

DC G3 SERIES C OMMERCIAL GAS D AMPERED W A TER HEA TERS Copyright© by Americ an Water Heat er Company 2005. All rights reserved. FCG3-0805 No Hot Wa ter Po wer to heater? Repair power problem NO YES When thermostat is turned up does pilot spark? Check for 24V between purple and white wires on the ignition control module (ICM) W ill EC O light rese[...]

DC G3 SERIES THERMOST A T TROUBLESHOO TING FL OW CHART Copyright© by Americ an Water Heat er Company 2005. All rights reserved. FCG3-0805 No voltage or low voltage fr om purple wire between thermostat board & EC O board Replace bad sensor(s) Replace EC O board W ith an ohm meter set at X1, check orange wires on set pot. (3,000 ohms at low est [...]

26 REP AIR P ARTS ILLUSTRA TION Rep air Part s List When ordering rep air p art s always give the following information: 1. Model, serial, and product number 2. T ype of gas 3. Item number 4. Part s description N o. Pa rt Na me a nd D e s cription N o. Pa rt Na me a nd D e s cription 1 D r af thoo d 15 Main B ur ner Or if ic e( s ) 2 D iptube (T op[...]