Daikin REYQ8-48PY1B, Руководство по обслуживанию

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Test Operation SiBE37-701_B
175 Test Operation
The automatic refrigerant charging has limits as described below.
At out of limit, the system can not operate the automatic refrigerant charging.
Outdoor temperature : 0°C DB~43°C DB
Indoor temperature : 10°C DB~32°C DB
Total indoor unit capacity :
≥
80%
To speed up the process of charging refrigerant for large systems, it is recommended to first
manually charge a portion of the refrigerant first before performing automatic charging.
1. Calculate how much refrigerant to be added using the formula explained in the chapter "How
to calculate the additional refrigerant to be charged" on page 158.
2. The amount of pre-charging is 10 kg less than the calculated amount.
3. Open valve B (the valves A and C, the liquid pipe, the suction gas pipe and the high
pressure/low pressure gas pipe stop valves must be left closed) and charge the refrigerant in
liquid form via the liquid pipe stop valve service port.
(See figure below)
4. If the calculated amount of pre-charging is reached, close valve B.
At least the unit should be charged with its original amount of refrigerant (refer to the nameplate
on the unit), before starting the automatic charging.
5. After pre-charging, perform the refrigerant charge operation as shown below and charge the
remaining refrigerant of the additional charging amount through valve A. (See above figure)
Refrigerant tank
(R-410A, siphon
system)
Measuring instrument
Suction gas pipe stop valve
Liquid pipe stop valve
Refrigerant charge port
Charge hose
Valve A
Valve B
Valve C
To BS-unit, indoor unit
High pressure/low pressure gas pipe stop valve
Equalizer pipe stop valve
Refrigerant tank
(R-410A, siphon
system)
Measuring
instrument Measuring
instrument
Valve A
The refrigerant will be charged with
±30 kg in 1 hour at an outdoor
temperature of 30°C DB (12 kg at 0°C
DB). If you need to speed up in case
of a multi system, connect the
refrigerant tank to each outdoor unit.
Stop valve
Service port
Field piping
Refrigerant flow
when charging