Please note the following:
DO NOT install this water heater with iron piping. The system should be installed only with new piping that is suitable for potable (drinkable) water such as copper, CPVC, or polybutylene. DO NOT use PVC water piping.
DO NOT use any pumps, valves, or fittings that are not compatible with potable water.
DO NOT use valves that may cause excessive restriction to water flow. Use full flow ball or gate valves only.
DO NOT use 50/50
DO NOT tamper with the electronic control board, temperature sensors, heating elements, electrical connections, or temperature and pressure relief valve. Tampering voids all warranties. Only qualified service technicians should service these components.
DO NOT use with piping that has been treated with chromates, boiler seal, or other chemicals.
DO NOT add any chemicals to the system piping which will contaminate the potable water supply.
Closed System/Thermal Expansion
Periodic discharge of the temperature and pressure relief valve may be due to thermal expansion in a closed water supply system. The water utility supply meter may contain a check valve, backflow preventer, or water pressure reducing valve. This will create a closed water system. During the heating cycle of the water heater, the water expands causing pressure inside the water heater to increase. This may cause the temperature and pressure relief valve to discharge small quantities of hot water. To prevent this, it is recommended that a
Do not plug or remove the temperature and pressure relief valve.
6
Temperature and Pressure
Relief Valve
WARNING
Explosion Hazard
If the temperature and pressure relief valve is dripping or leaking, have a qualified service technician replace it.
•Do not plug valve.
•Do not remove valve.
Failure to follow these instructions can result in death or explosion.
Figure 5
Temperature and Pressure
Relief Valve Installation
Optional location some
models only
Temperature and
Pressure Relief Valve
Discharge Line 3/4 inch min.
Do not cap or plug.
Drain Pan | 6 inch | |
maximum | ||
|
Drain
For protection against excessive pressures and temperatures, a temperature and pressure relief valve must be installed in the opening marked “T & P RELIEF VALVE” (See Figure 5).
Caution: To reduce the risk of excessive pressures and temperatures in this water heater, install temperature and pressure relief 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 the production of listed equipment or materials, as meeting the requirements for Relief Valves and Automatic Shutoff Devices for Hot Water Supply Systems, ANSI Z21.22
