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SINCLAIR
1 Water Input and Drainage of Water Tank
(1) Operation process for water input on the water tank
1) Cut off the power supply and open the cut-off valve at the water inlet of the tap faucet.
2) Open the cut-off valve at the hot water drain outlet and valve in user water use site.
3) Close the valve in user water use site when water is flowing out from user water use site.
4) Complete water input operation and reenergize the unit.
(2) Operation process for drainage on the water tank
1) Cut off the power supply and close the cut-off valve at the water outlet of the tap faucet.
2) Open the cut-off valve at the hot water drain outlet and valve in user water use site.
3) Open the cut-off valve on the joint (3-way) pipe.
4) Close the drainage cut-off valve after draining water on the water tank to complete drainage
operation.
2 Regular Cleaning for the Water Tank
To ensure the quality of hot water you use, follow the following steps to regularly clean the water
tank:
（1）Cut off the power supply of the unit.
（2）Close the cut-off valve on the water inlet pipe of the water tank.
（3）Open the cut-off valve at the hot water drain outlet and valve in user water use site.
（4）Open the cut-off valve in joint (3-way) connector, and wait for drainage of water inside water
tank.
（5）Close the cut-off valve in joint (3-way) connector, open the cut-off valve at the water inlet of the
water tank, close the cut-off valve at the water inlet when water flows from user water use site, then
reopen the cut-off valve in joint (3-way) connector, repeat the drainage operation, close the cut-off valve
in joint (3-way) connector when water discharged is clean.
(6) Conduct water input for the water tank according to water input operation.
(7) Water tank cleaning completed and energize it.
Note: Under normal conditions, the water tank can be cleaned once a year. If the water quality is
poor, you need to shorten cleaning frequency.
3 Safety 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 valve, which is a normal phenomenon. However, if a large
amount of water is discharged through the safety valve or even pipe vibration occurs and abnormal
noise is caused,contact Sinclaire authorized maintenance centers. The possible causes of this problem
are as follows: The safety 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 0.3MPa. If a
booster pump is used to replenish water, the water replenishment pressure may exceed 0.5MPa. In this
AIR SOURCE HEAT PUMP WATER HEATER SERVICE MANUAL
UNIT MAINTENANCE
64
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