Installing The Refrigerant Piping; Precautions For Devices That Use R410A Refrigerant - Mitsubishi Electric PUHZ-SW AA Série Manuel D'installation

4. COMP fixed parts removing work (Only PUHZ-SW100/SHW*AA)
1 COMP CASE TOP
7 NUTS
TIGHTENING
TORQUE
4 ± 0.4 N·m
Fig. 4-2

5. Installing the refrigerant piping

5.1. Precautions for devices that use R410A refrigerant

• Refer to 1.4. for precautions not included below on
using outdoor units with R410A refrigerant.
• Use ester oil, ether oil, alkylbenzene oil (small
amount) as the refrigeration oil applied to the flared
sections.
• Use C1220 copper phosphorus, for copper and cop-
per alloy seamless pipes, to connect the refrigerant
pipes. Use refrigerant pipes with the thicknesses
specified in the table to the below. Make sure the in-
sides of the pipes are clean and do not contain any
harmful contaminants such as sulfuric compounds,
oxidants, debris, or dust.
Always apply no-oxidation brazing when brazing
the pipes, otherwise, the compressor will be dam-
aged.
Warning:
When installing or relocating, or servicing the out-
door unit, use only the specified refrigerant (R410A)
to charge the refrigerant lines. Do not mix it with any
other refrigerant and do not allow air to remain in the
lines.
8
• After removing the COMP fixed parts, be sure to tighten nuts, and make COMP
Note:
• This work is applicable to the following models.
3 COMP CASE FRONT
• If the COMP fixed parts are not removed, the
• Before the COMP fixed parts are removed, be sure
If air is mixed with the refrigerant, then it can be the
cause of abnormal high pressure in the refrigerant
line, and may result in an explosion and other hazards.
The use of any refrigerant other than that specified
for the system will cause mechanical failure or sys-
tem malfunction or unit breakdown. In the worst case,
this could lead to a serious impediment to securing
product safety.
• Do not use pipes thinner than those specified
• Use 1/2 H or H pipes if the diameter is 22.2 mm or
CASE TOP and COMP CASE FRONT back to the original state. (Fig. 4-2)
REINSTALLING SEQUENCE
7
(
SCREWS TIGHTENING
TORQUE
1.5 ± 0.2 N·m
PUHZ-SW100VAA PUHZ-SW100YAA
PUHZ-SHW80VAA PUHZ-SHW80YAA
PUHZ-SHW112VAA PUHZ-SHW112YAA
PUHZ-SW100VAA-BS PUHZ-SW100YAA-BS
PUHZ-SHW80VAA-BS PUHZ-SHW80YAA-BS
PUHZ-SHW112VAA-BS PUHZ-SHW112YAA-BS
Caution:
operation noise may increase.
Warning:
to be breaker off. If not, the COMP case touches
electrical parts and they may break down.
Pipe size (mm)
[6.35
Thickness (mm) 0.8
[19.05
1.0
above.
larger.
3 1
)
[9.52 [12.7 [15.88
0.8 0.8 1.0
[22.2 [25.4 [28.58
1.0 1.0 1.0