Mitsubishi Electric MXZ-2A40VA Installationsanleitung Seite 7

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.
Tightening torque
N·m kgf·cm
Cap for service port 13.7 to 17.7 140 to 180
Cap for stop valve 19.6 to 29.4 200 to 300
5-5 EARTHING WORK
Put the earth circuit to the ground in accordance with "Technical Standards for Electrical Installation".
CAUTION:
Do not connect the earth cable to any gas pipe, water pipe, lightening rod or telephone earth cable.
If there is some deficiency in earthing work, it may cause a risk of electric shock.
The product incorporates a frequency inverter and so requires earthing in order to observe electric charge and
noise caused by static electricity.
5-6 LOCKING THE OPERATION MODE OF THE AIR CONDITIONER (COOL,
DRY, HEAT)
• Description of the function:
With this function, you can lock the operation mode of
the outdoor unit. Once the operation mode is locked to
either COOL/DRY mode or HEAT mode, the air condi-
tioner operates in that mode only.
* Initial setting is required to activate this function. Please
explain about this function to your customers and ask
them whether they want to use it.
[How to lock the operation mode]
1 Be sure to turn off the main power for the air conditioner
before making the setting.
2 Set the 2nd Dip Switch of SW1 on the outdoor controller
board to ON to enable this function.
3 To lock the operation mode in COOL/DRY mode, set the
1st Dip Switch of SW1 on the outdoor controller board to
OFF. To lock the operation in HEAT mode, set the same
switch to ON.
4 Turn on the main power for the air conditioner.
ON
ON ON
COOL/DRY HEAT
7
5-7 LOWERING THE OPERATING NOISE OF THE OUTDOOR UNIT
• Description of the function:
With this function, you can lower the operating noise of
the outdoor unit when the operation load is small, for ex-
ample, during nighttime in COOL mode. However, please
note that the cooling and heating capacity can also be
lowered if this function is activated.
* Initial setting is required to activate this function. Please
explain about this function to your customers and ask
them whether they want to use it.
[How to lower the operating noise]
1 Be sure to turn off the main power for the air conditioner
before making the setting.
2 Set the 3rd Dip Switch of SW1 on the outdoor controller
board to ON to enable this function.
3 Turn on the main power for the air conditioner.
5-8 CHECKING AFTER INSTALLATION
After finishing the installation, check the following items again by marking .
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 earth 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 CAUTION items in "1. THE FOLLOWING SHOULD ALWAYS BE OB-
SERVED FOR SAFETY" been checked?
5-9 GAS CHARGE
Perform gas charge to unit.
1 Connect gas cylinder to the service port of stop valve.
2 Perform air purge of the pipe (or hose) coming from refrigerant gas cylinder.
3 Replenish specified amount of the refrigerant, while operating the air conditioner for cooling.
Note:
In case of adding refrigerant, comply with the quantity specified for the refrigerating cycle.
ON
ON
Lower the operating
noise