evoheat Evo270 - Caution; Earthing Methodology; Use of the P&T Valve

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EvoHeat Evo270 Hot Water Heat Pump Manual
8.4 Caution
To reduce the risk of excessive pressures and temperatures in this water heater, install temperature and pressure
protective equipment required by local codes. A combination temperature and pressure relief valve must be
certified by a nationally recognized testing laboratory that maintains periodic inspection of production of listed
equipment or materials, as meeting the requirements for Relief Valves and Automatic Gas Shutoff Devices for Hot
Water Supply Systems, AS1357.1. This valve must be marked with a maximum set pressure not to exceed the
marked maximum working pressure of the water heater. Install the valve into an opening provided and marked for
this purpose in the water heater. Install the P&T Valve or provide tubing so that any discharge from the valve exits
only within 6 Inches above, or at any distance below, the structural floor, and does not contact any live electrical
part. The discharge opening must not be blocked or reduced in size under any circumstances.
Hydrogen gas is produced in a hot water system served by this heater that has not been used for a long period of
time (2 weeks or more). Hydrogen gas is extremely flammable. To reduce the risk of injury under these conditions, it
is recommended that the hot water faucet be opened for several minutes at the kitchen sink before using any
electrical appliance connected to the hot water system. When hydrogen is present, there will probably be an
unusual sound such as air escaping through the pipe as the water begins to flow.
There should be no smoking or open flame near the faucet at the time it is open.
8.5 Earthing Methodology
8.6 Use of the P&T Valve
The P&T valve is used to prevent the temperature or pressure becoming too
high inside the tank. When the temperature or pressure reaches the set
value, the valve will open automatically so as to force the pressure or
temperature to decrease.
The handle of the safety valve should be tested once every six months so as
to remove the calcium carbonate deposits and guarantee there is no
blockage in the device. Take care to avoid burns for the temperature of the
discharging water is very high.
Vent pipes should be thermally insulated to prevent safety risks caused by
freezing pipes in winter.