Grounding Work - Mitsubishi Electric MXZ-3A30NA Installation Manual

WARNING:
When installing or moving the unit, do not mix anything other than specified refrigerant (R410A) into
the refrigerating cycle.
If air is mixed, it may cause the refrigerating cycle to get abnormally high temperature, causing a risk of
burst.
Cap for service port
Cap for stop valve
5-6

GROUNDING WORK

Put the ground circuit to the ground in accordance with "Technical Standards for Electrical Installation".
CAUTION:
Do not connect the ground cable to any gas pipe, water pipe, lightening rod or telephone ground cable.
If there is some deficiency in grounding work, it may cause a risk of electric shock.
The product incorporates a frequency inverter and so requires grounding in order to observe electric charge
and noise caused by static electricity.
5-7 CHECKING AFTER INSTALLATION
After finishing the installation, check the following items again by making .
Have special circuits been provided?
Is power supply voltage as specified?
Has indoor/outdoor connecting wire been inserted into terminal block?
Has indoor/outdoor connecting wire been secured firmly?
Has intermediary connection between power cable and indoor/outdoor connecting wire been carried out?
Is combination of connection pipes and indoor/outdoor connecting wire correct (Room A, Room B, Room C,
Room D)?
Is ground cable connection correct?
Has leak test been carried out?
Has air purge been carried out?
Is stop valve fully open?
Has drain discharge been checked?
Is insulation over connection pipe joints correct?
Is strength of installation location well enough?
Have all of WARNING and
SERVED FOR SAFETY" been checked?
8
Tightening torque
N·m ft.·Ib
13.7 to 17.7 10 to 13
19.6 to 29.4 15 to 22
CAUTION items in "1. THE FOLLOWING SHOULD ALWAYS BE OB-