AUX ACHP-H04/4R3HA, Техническое и сервисное руководство

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R32 Split Type - Air Source Heat Pump 20220105
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Start the vacuum pump and then open the pressure gauge valves to start vacuum the system.
After 30 minutes, close the pressure gauge valves.
After a further 5 to 10 minutes check the pressure gauge. If the gauge has returned to zero, check for leakages
in the refrigerant piping
Step 3
Reopen the pressure gauge valves and continue vacuum drying for at least 2 hours and until a pressure
difference of 755mmHg or more has been achieved. Once the pressure difference of at least 755mmHg has
been achieved, continue vacuum drying for 2 hours.
After 30 minutes, close the valve on the gauge;
Step 4
Close the pressure gauge valves and then stop the vacuum pump.
After 1 hour, check the pressure gauge. If the pressure in the piping has not increased, the procedure is
finished. If the pressure has increased, check for leakages.
After vacuum drying, keep the blue and red hoses connected to the pressure gauge and to the outdoor unit
stop valves, in preparation for refrigerant charging (see Part 3, 3.11 Charging Refrigerant).
2.11 Charging Refrigerant
2.11.1 Calculating additional refrigerant charge
The additional refrigerant charge required depends on the lengths and diameters of the outdoor unit and
hydronic box liquid pipes. If the length of the liquid side pipe is less than 15 meters it is no need to add more
refrigerant, so calculating the added refrigerant the length of the liquid side pipe must subtract 15 meters.
Additional refrigerant charge
Model
Liquid side
piping (mm)
Refrigerant
Additional refrigerant charge per meter of equivalent
length of piping (kg)
4/6kW 9.52 R32 L-15*38
8/10kW 9.52 R32 L-15*38
12/14/16kW 9.52 R32 L-15*38
2.11.2 Adding refrigerant
Notes for installers
Caution
 Only charge refrigerant after performing a gas tightness test and vacuum drying.
 Never charge more refrigerant than required as doing so can lead to liquid hammering.
 Only use refrigerant R32 charging with an unsuitable substance may cause explosions or accidents
 Use tools and equipment designed for use with R32 to ensure required pressure resistance and to prevent
foreign materials from entering the system.

Refrigerant must be treated in accordance with applicable legislation.
 Always use protective gloves and protect your eyes when charging refrigerant.
 Open refrigerant containers slowly
Procedure
The procedure for adding refrigerant is as follows:
Step 1
Calculate additional refrigerant charge R (kg) (see Part 3, 3.11.1 Calculating Additional Refrigerant Charge)
Step 2
Place a tank of R32 refrigerant on a weighing scale. Turn the tank upside down to ensure refrigerant is