1. Remove the cap from the refrigerant fluid stop valve, fluid end.
2. Open valve A with a hexagonal spanner by turning anti-clockwise until
it stops.
3. Put the cap back in place.
4. Remove the cap from refrigerant gas stop valve B or C.
5. Open the valve.
Valve B
Open the valve with pliers by turning it a quar
ter turn anti-clockwise.
Valve C
Open the valve with a hexagonal spanner by
turning anti-clockwise until it stops.
6. Put the cap back in place.
7. Put the cap back in place on valve A.
8. Tighten all the caps with a torque wrench with a torque load of 20 to
25 N·m.
9. Depending on the length of the refrigerant pipes, it may be necessary
to add refrigerant fluid.
For more information, see
Adding the necessary quantity of refrigerant fluid, page 48
5.9.7
Adding the necessary quantity of refrigerant fluid
If the refrigerant connection pipes exceed the lengths below, add
refrigerant fluid via the refrigerant fluid stop valve using a safety loader.
Caution
Prevent oil traps.
If the pipes are not connected immediately, plug them to prevent
moisture from entering.
Tab.28 Quantity of refrigerant fluid to be added
Length of refrigeration pipe
7 m
10 m
15 m
20 m
30 m
Yg/m
0
+ 0.045 kg
+ 0.120 kg
+ 0.195 kg
+ 0.345 kg
(1) The outdoor unit is pre-charged with 1300 kg of refrigerant fluid.
(2) Calculation: Xg = Yg/m x (pipe length (m) – 7)
Tab.29 Quantity of refrigerant fluid to be added
Length of refrigeration pipe
11 to 20 m
21 to 30 m
31 to 40 m
41 to 50 m
51 to 60 m
61 to 75 m
AWHP 6 MR-3
0.2 kg
0.4 kg
0.6 kg
not permit
ted
not permit
ted
not permit
ted
AWHP 8 MR-2
0.15 kg
0.3 kg
0.9 kg
not permit
ted
not permit
ted
not permit
ted
5.9.8
Checking the refrigeration circuit
1. Check the position of the outdoor unit, distance from the wall.
2. Check the tightness of the refrigerant connections.
3. Ensure that the evacuation pressure has been checked by filling.
4. Ensure that the evacuation time and the outside temperature have
been checking during evacuation.
Fig.59
MW-M002295-2
1
8
3
5
4
6
2
4
6
5
A
B
C
5 Installation
48
7654506 - v06 - 19112019
