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CHARGING WITH REFRIGERANT R134a
15) Unscrew the protective cap of low-pressure probe (Fig pr.9.1)
16) Connect the high-pressure hose, equipped in both ends with taps to
the probe and to the recovery machine. By the same way connect
recovery machine to the filled bottle for R134a (Fig pr.9.6).
17) Put the bottle on sca
les with precision ±10g and tare it to “0” (Fig
pr.9.7).
18) Be sure that the recovery machine and all pressure hoses are filled
with refrigerant.
19) Open the tap 1&2 and all others. Then start the recovery machine in
“charging mode” and use it according to its user manual.
20) The quantity of refrigerant that should be charged in heat pump is 880-
890g. The gas located into the hoses and recovery machine does not
count!
21) Stop the recovery machine. Close all taps.
22) When the scales read 880
– 890g refrigerant consumed, close the tap1
immediately.
23) CLOSE THE TAP OF THE BOTTLE WITH R134a!
CHECKING THE WORKING PARAMETERS OF THE HEAT PUMP
24) Unscrew the protective cap of low and high-pressure probes (Fig
pr.9.1)
25) Connect the high-pressure hoses, equipped in both ends with taps to
the probes and to the instrument. (Fig pr.9.8).
26) Fill the unit with water if it is not
27) Start the heat pump and the instrument.
28) Read the data and compare with the tables point F at the end of this
document (±5%).
Fig: pr.9.6: Fig: pr.9.7:
Fig pr.9.8:
