Air Source Heat Pump Water Heater
36
16.4 Safety Check Valve Maintenance
In the heating process, when the inner container of water tank is in overpressure,
a small amount of water may be discharged through the safety check valve, which is
a normal phenomenon. However, if a large amount of water is discharged through
the safety check valve or even pipe vibration occurs and abnormal noise is caused,
contact
C&H
authorized maintenance centers. The possible causes of this problem
are as follows: The safety check valve is damaged; the water replenishment
pressure is higher than the maximum working pressure (0.7MPa) of the water
tank, which occurs generally when pressure reduction is not performed on the
tap water. In normal conditions, the tap water pressure is around 0.3 MPa. If a
booster pump is used to replenish water, the water replenishment pressure may
exceed 0.7 MPa. In this case, a pressure reduction valve needs to be added to the
tap water replenishment pipe to reduce water replenishment pressure.
Open the safety check valve
’s handle to check whether it is blocked on a regular
(about once a month) basis. If it is blocked, contact the authorized maintenance
center for check or replacement. Perform sewage disposal by following the guide on
a regular (about once a year) basis.
16.5 Maintenance of the Unit
(1)
Regularly check whether the air inlet and outlet of the main unit are
blocked. If blocked, immediately clean them.
(2)
Regularly check whether piping between the main unit and the water tank,
piping on the water use side, pipe fittings, and valves are damaged or blocked.
Check whether any joint leaks, and whether the filter is blocked.
