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Piping installation
Installer reference guide
73
ERLA EHFZ03S18DJ3V
Daikin Altherma 3 R F
4P596821-1B – 2021.10
NOTICE
ALWAYS use a recommended bubble test solution from your wholesaler.
NEVER use soap water:
▪
Soap water may cause cracking of components, such as flare nuts or stop valve
caps.
▪
Soap water may contain salt, which absorbs moisture that will freeze when the
piping gets cold.
▪
Soap water contains ammonia which may lead to corrosion of flared joints
(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.
8.3.5 To perform vacuum drying
Connect the vacuum pump and manifold as follows:
a
d
j
b
f
e
c
g h i
h
a
Pressure meter
b
Gauge manifold
c
Low pressure valve (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:
