a)
Remove the plugs of the two-way, three-way valve on the outdoor unit and the service valve.
Check that both of the outdoor unit valves are closed;
b)
Connect a vacuum pump to the service valve.
c)
After opening the pump valve, turn it on and let it run. Create a vacuum for about 40-45 minutes.
d)
Check that the arrow on the pressure gauge shows pressure equal to 1 bar (or -76 cm Hg);
e)
Close the pump valve. Make sure the pressure gauge arrow does not move for at least 5 minutes.
If the arrow is moving, there is an air penetration into the system, and you need to check all
connections. After removing the leakage, repeat the procedure.
f)
Disconnect the pump and unscrew the hose that is connected to the service valve;
g)
Fully open the three-way and two-way valve by means of a hexagonal wrench;
h)
Screw and tighten the valve plugs firmly;
i)
Check for refrigerant leakage with a suitable detector.
Fig. 11
CONNECTING OF THE INDOOR UNIT TO THE PLUMBING INSTALLATION
Fig.12
The plumbing installation to which the indoor unit will be connected as well as the other elements
included therein shall withstand continuously water temperatures over 80 ° C and shortly over 100 °
C and at least twice the pressure higher than the working pressure of the appliance
When connecting the indoor unit to the plumbing system, the indicating arrows and guiding rings
around the cold and hot water pipes (inlet and outlet pipes) must be observed. With the arrow
pointing towards the pipe and blue color is marked the cold water pipe, and with the arrow pointing
out of the pipe and red color - the hot water pipe. The pipes of some of the appliances are
additionally labeled. Pipe terminals are threaded 1/2 ". A schematic diagram of the connection of the
indoor unit is shown in Fig. 12. In this case, the indoor unit operates at the pressure of the water
supply main and that of the safety valve. In case the pressure of the water supply main is greater
10
