Daikin R32 Series User Manual

6 | Installation
Installer reference guide
41
3(A)MXM+3(A)MXF+4MXM+5MXM
R32 Split series
4P600463-1B – 2020.05
6.5.3 To check for leaks
NOTICE
Do NOT exceed the unit's maximum working pressure (see "PS High" on the unit
name plate).
NOTICE
Make sure to use a recommended bubble test solution from your wholesaler. Do not
use soap water, which may cause cracking of flare nuts (soap water may contain salt,
which absorbs moisture that will freeze when the piping gets cold), and/or lead to
corrosion of flared joints (soap water may contain ammonia which causes a corrosive
effect between the brass flare nut and the copper flare).
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.
6.5.4 To perform vacuum drying
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:

Daikin R32 Series Specifications

General

Refrigerant	R32
Airflow Direction Control	Yes
Type	Split System
Cooling Capacity	Varies by model
Heating Capacity	Varies by model
Energy Efficiency Ratio (EER)	Varies by model
Coefficient of Performance (COP)	Varies by model
Noise Level (Indoor Unit)	Varies by model
Noise Level (Outdoor Unit)	Varies by model
Power Supply	Varies by model
Indoor Unit Dimensions	Varies by model
Outdoor Unit Dimensions	Varies by model
Indoor Unit Weight	Varies by model
Outdoor Unit Weight	Varies by model