To Prevent The Outdoor Unit From Falling Over; Connecting The Refrigerant Piping; To Connect The Refrigerant Piping To The Outdoor Unit; Checking The Refrigerant Piping - Daikin Altherma Split ERLQ004CAV3 Manuel D'installation

3 Installation

3.2.4 To prevent the outdoor unit from falling over

1 Prepare 2 cables as indicated in the following illustration (field
supply).
2 Place the 2 cables over the outdoor unit.
3 Insert a rubber sheet between the cables and the outdoor unit to
prevent the cable from scratching the paint (field supply).
4 Attach the cable's ends. Tighten those ends.
3.3

Connecting the refrigerant piping

DANGER: RISK OF BURNING
3.3.1 To connect the refrigerant piping to the
outdoor unit
1 Connect the liquid refrigerant connection from the indoor unit to
the liquid stop valve of the outdoor unit.
a
b
c
a Liquid stop valve
b Gas stop valve
c Service port
2 Connect the gas refrigerant connection from the indoor unit to
the refrigerant stop valve of the outdoor unit.
Installation manual
4
3.4

Checking the refrigerant piping

3.4.1 To check for leaks

NOTICE
Do NOT exceed the maximum operation pressure of
4000 kPa (40 bar).
Only use recommended bubble test solution.
1 Charge the system with nitrogen gas up to a gauge pressure of
at least 200 kPa (2 bar).
2 Check for leaks by applying the bubble test solution to all
connections.
3 Discharge all nitrogen gas.

3.4.2 To perform vacuum drying

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...
Does not change
Increases
3 Evacuate for at least 2 hours to a pressure on the manifold of –
0.1 MPa (–1 bar).
4 After turning OFF the pump, 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.
3.5

Charging refrigerant

3.5.1 To determine the additional refrigerant
amount
If the total liquid piping length
is...
≤10 m
>10 m

3.5.2 To charge refrigerant

WARNING
Only use R410A as refrigerant. Other substances may
cause explosions and accidents.
1 Connect the refrigerant cylinder to the service port.
2 Charge the additional refrigerant amount.
3 Open the gas stop valve.
Daikin Altherma low temperature Split outdoor unit
Then...
There is no moisture in the
system. This procedure is
finished.
There is moisture in the
system. Go to the next step.
Then...
Do NOT add additional
refrigerant.
Add 20 g refrigerant per extra
meter (above 10 m).
ERLQ004~008CAV3
4PW73435-1 – 2012.05