Mitsubishi Electric MXZ-2A52VA, Installation Manual

Page: 7 / 10

7
WARNING:
When installing or moving the unit, do not mix anything other than speci fi ed 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 de
fi ciency 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 conditioner operates in that mode only.
●
Initial setting is required to activate this function.
Please explain about this function to your custom-
ers 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 condi-
tioner before making the setting.
2
Set the 2nd Dip Switch of SW1 on the outdoor con-
troller 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 A A
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 example, during nighttime in COOL mode.
However, please note that the cooling and heating
capacity can also be lowered if this function is acti-
vated.
* Initial setting is required to activate this function.
Please explain about this function to your custom-
ers 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 condi-
tioner before making the setting.
2
Set the 3rd Dip Switch of SW1 on the outdoor con-
troller board to ON to enable this function.
3
Turn on the main power for the air conditioner.
ON
ON
Lower the operating
noise
5-8 CHECKING AFTER INSTALLATION
After fi nishing the installation, check the following items again by marking c .
c
Have special circuits been provided?
c Is power supply voltage as speci fi ed?
c
Has indoor/outdoor connecting wire been inserted into terminal block?
c Has indoor/outdoor connecting wire been secured fi rmly?
c
Has intermediary connection between power cable and indoor/outdoor connecting wire been carried out?
c Is combination of connection pipes and indoor/outdoor connecting wire correct (Room A, Room B)?
c
Is earth cable connection correct?
c Has leak test been carried out?
c
Has air purge been carried out?
c Is stop valve fully open?
c Has drain discharge been checked?
c
Is insulation over connection pipe joints correct?
c Is strength of installation location well enough?
c
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 speci fi ed amount of the refrigerant, while operating the air conditioner for cooling.
Note:
In case of adding refrigerant, comply with the quantity speci
fi ed for the refrigerating cycle.
SG79Y644H01.indd 7 SG79Y644H01.indd 7 29.11.2005 17:04:15 Uhr 29.11.2005 17:04:15 Uhr