Air Source Heat Pump Water Heater
20
the unit shall be connected to the inlet of the water tank via a stub of PPR as
Figure 7-5 is shown. The other end of the safety valve is connected with running
water pipe. To ensure usage safety, sequence in Figure 8-1 shall be strictly
obeyed.
Cut off valve or check valve (one-way valve) shall not be installed between
safety valve and the water tank, otherwise, safety valve shall not work normally,
water tank error might occur.
During heating operation process, safety valve dripping water is a normal
phenomenon of pressure relief. Under standby status, if the safety valve keeps
dripping water, please check if water pressure is too high (not over 0.7MPa). If
water pressure is higher than 0.7MPa, install stabilizing valve correctly according
to “(6) Stabilizing valve installation”; if water pressure is below 0.7MPa, please
check and replace safety valve.
Safety valve must install diversion tube and be reliably fixed to prevent
falling off; lead the drainage hose to floor drain downward naturally and properly
without bending or any twine. After that, the surplus hose must be cut to avoid
water in drainage hose getting frozen due to blocking of drainage or low
temperature.
To avoid any inconveniences or property losses due to water leakage or
safety valve discharging water which is resulted from improper connection of
water pipe, water tank and safety valve shall not be installed inside the room or
balcony which is without discharge floor drain.
（
a
）
Installation method 1