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Commercial Gas
Water Heater
Installation
Instructions and
Use & Care Guide
for models with prefix DCG and ADCG
To obtain technical, warranty or service assistance during
or after the installation of this water heater, call toll free:
1-800-456-9805
When calling for assistance, please have the following
information ready:
1. Model number
2. 7 digit product number
3. Serial number
4. Date of installation
5. Place of purchase
Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . 2
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what can happen if the instructions are not followed. Table of Contents Water Heater Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Installation Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5 Unpacking the Water Heater . . . . . . . . . . . . . . . . . . . . . . 3 Installation Requirements . . . . . . . . . . . . . . . . . . . . . . . ..4 Site Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Clea
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INSTALLATION INSTRUCTIONS Massachusetts code requires this water heater to be Consumer Information installed in accordance with Massachusetts Plumbing This water heater is design-certified by CSA and Fuel Gas Code 248 CMR Sections 2.00 and 5.00. International as a Category I, non-direct vented water heater which takes its combustion air either from the A data plate identifying this water heater can be found installation area or from air ducted to the unit from the on the front of the water heate
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Site Location Select a location near the center of the water piping system. The water heater must be installed indoors and in a vertical position on a level surface. DO NOT install in bathrooms, bedrooms, or any occupied room normally kept closed. Locate the water heater as close to the gas vent as practical. Consider the vent system piping and combustion air supply requirements when selecting the water heater location. The FLAMMABLES FLAMMABLE VAPORS venting system must be able to
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Important: Figure1: Minimum Clearance Locations The water heater should be located in an area where leakage of the tank or connections will not result in dam- age to the area adjacent to the water heater or to lower floors of the structure. Due to the normal corrosive Back Sides action of the water, the tank will eventually leak after an extended period of time. A suitable metal drain pan should be installed under the water heater as shown below, to help protect the property from damage which
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COMBUSTION/VENT PIPE SYSTEM Important: Check to make sure the vent pipe is not blocked in any way. Venting should be as direct as possible with a minimum number of pipe fittings. Carbon Monoxide Hazard Exhaust gas vents must be installed with U.L. Follow all instructions to locate and install listed type B vent pipe according to the vent the vent pipe system. manufacturers instructions and the terms of its listing. Instructions can be found in this manual, Single wall vent connectors
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For buildings that are not well sealed (do not have tight Air Requirements fitting doors and windows) natural air infiltration may provide sufficient air required for combustion and venti- lation. For buildings using tight construction (newer and renovated structures), the air supply shall be introduced An adequate air supply shall be provided from the outdoors, regardless of whether the space is for combustion and ventilation of this confined or unconfined. water heater. An insufficient supply
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Air Opening Requirements Figure: 2 Equipment Location and Combustion/Ventilation Air (a) EQUIPMENT LOCATED IN CONFINED SPACES; ALL AIR FROM Requirements INSIDE THE BUILDING. Two permanent openings (top and bottom) shall be provided connecting the confined space (e.g., closet/small room) with the unconfined space. Each opening shall have a free area of one square inch per 1,000 BTU/hour (22 cm²/kW) input of all appliances in the confined space, but not less than 100 square inches (645 cm²). b)
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Draft Hood/Damper Installation Flue Outlet Reducer Some units 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 Do not operate water heater with damper connected to the top of the flue damper and sealed by in closed position, it must be in the open high temperature silicon. The vent pipe must be installed according to all local position during water heater operation. and state codes or, in the abs
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WATER SYSTEM PIPING Piping Installation Space Heating Piping, fittings, and valves should be installed according to If this unit is to be used to supply both space heating and the installation drawing (Figure 4). If the indoor installation domestic potable (drinking) water then the following area is subject to freezing temperatures, the water piping instructions must be followed: must be protected by insulation. 1. All piping and components used must be suitable Water supply pressure should n
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Figure 6: Commercial Unit with Auxiliary Booster Heater - Two Temperature (With or Without Building Recirculation) Outlet Hot Water Boosted to Fixtures Temperature Thermometer Shut-off valve Shut-off valve Temperature and Thermometer Pressure Relief Valve Temperature and Pressure Relief Valve Check Valve Typical Pre-Heater Booster Heater Thermal Expansion Shut-off valve Tank 1 1/2 Cold Shut-off valve water supply Pre-Heated Water to the Booster Pressure Reducing Valve Note: Install a vacuum r
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Figure 8: Commercial Unit with Auxiliary Storage Heater - Forced Circulation With or Without Building Recirculation - Top Inlet/Outlet Connections Thermal Outlet Expansion Boosted Pressure Tank Temperature Reducing Thermometer Hot Water Thermometer 1 1/2 Cold Valve to Fixtures Pre-Heated water supply Water to the Booster Shut-off valve Check valve Shut-off valve Temperature and Pressure Relief Valve Temperature and Pressure Relief Valve Typical Pre-Heater Booster Heater Note: Install a vacuum
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must not exceed the working pressure of the water Temperature and Pressure heater as stated on the data plate. Important: Only a new temperature and pressure relief Relief Valve valve should be used with this water heater. Do not use an old or existing valve as it may be damaged or not adequate for the working pressure of the new water heater. Do not place any valve or piping between the relief valve and the tank. The Temperature & Pressure Relief Valve: Must not be in contact with any electri
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GAS SUPPLY AND PIPING how to turn off the gas to this unit. 2. Install a drip leg as shown. The drip leg must be no less than 3 inches (76mm) long for the accumula- tion of dirt,foreign material and water droplets. 3. Install a ground joint union between the water heater and the manual shut-off valve. This is to allow easy servicing. 4. Turn the gas supply on and check for leaks. Use a chloride-free soap and water solution (bubbles Explosion Hazard forming indicate a leak) or other approve
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Gas Pressure Testing Important: This water heater and its 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 its manual shut-off valve must be disconnected from the gas supply piping system and the line capped. Explosion Hazard If the gas lines are to be tested at a pressure Have a qualified service technician make less than 14 W.C., the water heater mu
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ELECTRICAL CONNECTIONS Electrical Installation 1. Shut off the power at the electrical service box. 2. Loosen the screws securing the access panel to the electrical compartment. (The electrical wiring diagram can be found on the inside of the access panel.) Set the access panel aside. 3. Connect the electrical supply to the water heater in accordance with local utility requirements and codes or, in the absence of local codes, with the National Electrical Code, ANSI/NFPA 70 and/or the C
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WIRING DIAGRAM 17 17
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INSTALLATION CHECKLIST Water Heater Location Requirements Vent Termination Centrally located with the water piping system. Vertical Located as close to the gas piping and vent Vertical gas vents must terminate with a listed pipe system as possible. cap or other roof assembly and be installed Located indoors and in a vertical position. according to their manufacturers instructions. Protected from freezing temperatures. Water System Piping Proper clearances from combustible surfaces
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OPERATING YOUR WATER HEATER Read and understand these directions thoroughly Water Heater Operation before attempting to operate the water heater (see When the thermostat calls for heat, it will signal the Lighting Instructions on page 20). Check the data plate damper to open. Once the damper fully opens, it will on the front of the water heater for the correct gas. Do signal the igniter to light the pilot. The pilot will then not use this water heater with any gas other than the ignite the mai
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OPERATING INSTRUCTIONS 7. Turn gas control knob counterclockwise to ON. 8. Set thermostat to desired setting. 1. STOP! Read the safety information above on this 9. Turn on all electric power to the label. appliance. 2. Turn off all electric power to the appliance. 3. Set the thermostat to the lowest setting. 4. This appliance is equipped with an ignition device which automatically lights the pilot. Do not try to light the pilot by hand. 5. Turn the gas control knob clockwise to
