Sinclair SWH-200DE Service And Installation Manual page 31

SINCLAIR
(4) Remove the sealing caps of the connecting pipe. Align the center of the bell mouth with the pipe
joint and valve cone, and screw up the conical nut with your hand and then with a wrench, as shown in
Figure 4-2.
4.2.2 Exhausting Air in the Refrigerant Pipe and Refrigerant Charge
Length of Connection Pipe
Not greater than 10 m
NOTE: The unit capability and energy efficiency decreases when length of the connecting pipe
increases. Therefore, take thermal insulation measures on the connecting pipe when it needs to be
extended.
Exhausting Air in the Refrigerant Pipe must use vacuum pump.
(1) Connect the filling hose to the fluoride injection mouth of the air valve. Ensure that the valve cores of
the air valve and fluid valve are tightly closed.
(2) Connect the joint of the filling hose to the vacuum pump.
(3) Fully open the low pressure valve of the pressure gauge.
(4) Start the vacuum pump to vacuumize the air for 20 minutes or more, and ensure that the pressure
gauge pointer points to -1.0 bar. Close the low pressure valve, and stop the vacuum pump. Wait 2
minutes. If the number indicated by the pressure gauge pointer does not rise, the vacuumization
and piping are successful. If the number indicated by the pressure gauge pointer rises, it indicates
that air is entering the system. In this case, check the piping for leaks, and vaccumize the air again.
(5) Remove the filling pose from the air valve.
(6) Fully open valve cores of the gas valve and fluid valve.
(7) Tighten the valve caps of the air valve and fluid valve, and the fluoride injection mouth nut.
(8) Tighten the valve caps, and then use a leak detector or soapy water to check whether the pipes for
connecting the outdoor unit and the water tank leak.
AIR SOURCE HEAT PUMP WATER HEATER SERVICE MANUAL
Figure 4-1 Refrigerant connecting pipe through the wall
Figure 4-2 Fastening the connecting pipe
Table 4-1 Refrigerant Charge
10 to 20 m
Refrigerant Charge Volume
28
/
+22g/m