Installation Instructions
CONNECTING THE WATER HEATER TO GAS AND WATER (cont.)
3 WATER PIPING
GENERAL INSTRUCTIONS
•The water supply should be shut off while connecting the water heater. Make sure the water inlet and outlet lines to the water heater fit in the diagram shown on page 7. A manual water control valve must be placed in the water inlet connection to the water heater before it is connected to the water line. Unions can be used on both the hot and cold water lines for future servicing and disconnection of the unit.
•The piping (including soldering materials) and components connected to this appliance must be approved for use in potable water systems.
•Purge the water line to remove all debris and air. Debris will damage the water heater.
•Toxic chemicals such as those used for boiler water treatment are not to be introduced to the potable water used for space heating.
•If the appliance will be used as a potable water source, it must not be connected to a system that was previously used with a nonpotable water heating appliance.
•Ensure that the water filter on the water heater is clean and installed. See the Cleaning the inlet filter section on page 19.
•New plumbing typically has contamination in the lines. The inlet water filter should be cleaned immediately after initial use.
CAUTION: Hot Water outlet pipes leaving unit can be hot to touch. Insulation must be used for hot water pipes below 36″ due to burn risk to children.
PRESSURE RELIEF VALVE
•Make sure the pressure relief valve is installed so there is clearance if the optional pipe cover (AGTPCM) is installed.
•An approved pressure relief valve is required by the American National Standard (ANSI Z21.10.3)/Canadian Standard (CSA 4.3)
for all water heating systems.
•The relief valve must comply with the standard for Relief Valves and Automatic Gas Shutoff Devices for Hot Water Supply Systems (ANSI Z21.22) and/or the standard Temperature, Pressure, Temperature and Pressure Relief Valves and Vacuum Relief Valves,
3 WATER PIPING (cont.)
PRESSURE RELIEF VALVE (cont.)
•The relief valve must be rated up to 150 psi and to at least the maximum BTU/hr of the appliance.
•The discharge from the pressure relief valve should be piped to the ground or into a drain system to prevent exposure or possible burn hazards to humans or other plant or animal life. Follow local codes. Water discharged from the relief valve could cause severe burns instantly, scalds or death.
•The pressure relief valve must be manually operated once a year to check for correct operation.
•The relief valve should be added to the hot water outlet line according to the manufacturer’s instructions. DO NOT place any other type of valve or
•Do not plug the relief valve and do not install any reducing fittings or other restrictions in the relief line. The relief line should allow for complete drainage of the valve and the line.
•If a relief valve discharges periodically, this may be due to thermal expansion in a closed water supply system. Contact the water supplier or local plumbing inspector on how to correct this situation. Do not plug the relief valve.
•Neither GE nor the American National Standard (ANSI Z21.10.3)/Canadian Standard (CSA 4.3) requires a combination temperature and pressure relief valve for this appliance; however, local codes may require a combination temperature and pressure relief valve.
INTERNAL BUILT-IN FREEZE PROTECTION
•The freeze protection features include
electrical heating elements and intermittent firing of the burner. Freeze protection may be disabled if electricity or gas is not supplied, or if there is an error preventing the water heater from functioning.
NOTE: See Supplemental Freeze Protection on page 13.
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