Daikin 4MXM80A2V1B User Manual

7 | Piping installation
Installer reference guide
44
2MXM-A, 3MXM-A, 4MXM-A, 5MXM-A
R32 Split series
4P600463-5E – 2021.12
1 Charge the system with nitrogen gas up to a gauge pressure of at least
200kPa (2bar). It is recommended to pressurize to 3000kPa (30bar) in order
to detect small leaks.
2 Check for leaks by applying the bubble test solution to all connections.
3 Discharge all nitrogen gas.
7.3.4 To perform vacuum drying
DANGER: RISK OF EXPLOSION
Do NOT start the unit if it is vacuumed.
Connect the vacuum pump and manifold as follows:
Connect the vacuum pump and manifold as follows:
a
h
b
f
h
i
e
c
d
e
g
j
a Pressure meter
b Gauge manifold
c Low-pressure valeve (Lo)
d High-pressure valve (Hi)
e Charging hoses
f Vacuum pump
g Service port
h Valve lids
i Gas stop valve
j Liquid stop valve
1 Vacuum the system until the pressure on the manifold indicates −0.1 MPa
(−1bar).
2 Leave as is for 4-5minutes and check the pressure:
If the pressure… Then…
Does not change There is no moisture in the system.
This procedure is finished.
Increases There is moisture in the system. Go
to the next step.
3 Vacuum the system for at least 2hours to a manifold pressure of −0.1MPa
(−1bar).
4 After turning the pump OFF, check the pressure for at least 1hour.
5 If you do NOT reach the target vacuum or CANNOT maintain the vacuum for
1hour, do the following:
▪ Check for leaks again.
▪ Perform vacuum drying again.
NOTICE
Make sure to open the stop valves after installing the refrigerant piping and
performing vacuum drying. Running the system with the stop valves closed may
break the compressor.

Daikin 4MXM80A2V1B Specifications

General

Brand	Daikin
Model	4MXM80A2V1B
Category	Air Conditioner
Language	English