Mitsubishi Electric MXZ-4C80VA Manual De Instalación página 7

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4-2. 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 condi-
tioner for cooling.
Note:
In case of adding refrigerant, comply with the quantity specified for the refrigerat-
ing cycle.
CAUTION:
When charging the refrigerant system with additional refrigerant, be sure to use
liquid refrigerant. Adding gas refrigerant may change the composition of the
refrigerant in the system and affect normal operation of the air conditioner. Also,
charge the liquid refrigerant slowly, otherwise the compressor will be locked.
To maintain the high pressure of the gas cylinder, warm the gas cylinder with
warm water (under 40°C) during cold season. But never use naked fire or steam.
4-3. LOCKING THE OPERATION MODE OF THE AIR CONDITIONER (COOL, DRY, HEAT)
• Description of the function:
With this function, once the operation mode is locked to either COOL/DRY
mode or HEAT mode, the air conditioner operates in that mode only.
* Changing the 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 "1" of SW1 on the outdoor controller board to ON to enable this func-
tion.
3) To lock the operation mode in COOL/DRY mode, set the "2" 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.
4-4. LOWERING THE OPERATION NOISE OF THE OUTDOOR UNIT
• Description of the function:
With this function, the operating noise of the outdoor unit can be lowered by reducing the operation load, for example, during nighttime in COOL mode.
However, please note that the cooling and heating capacity may lower if this function is activated.
* Changing the 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 "3" of SW1 on the outdoor controller board to ON to enable this func-
tion.
3) Turn on the main power for the air conditioner.
4-5. CHANGING THE AMPERE LIMIT
• Description of the function:
With this function, the amount of current that flows in the outdoor unit can be
changed.
Note:
Use this function only when the amount of current exceeds the allowed value.
[How to change the ampere limit]
1) Be sure to turn off the main power for the air conditioner before making the
setting.
2) Make the setting referring to the table below.
3) Turn on the main power for the air conditioner.
Stop valve
Union
Union
Indoor
unit
Union
Stop valve with
Union
service port
Refrigerant gas
cylinder
operating valve
Gauge manifold
(for R410A)
valve (for R410A)
Refrigerant gas cylinder for R410A with siphon
Refrigerant (liquid)
Electronic scale for refrigerant charging
COOL/DRY
HEAT
Lower the operating noise
SW2
MXZ-5C100VA
10.5 A
15.5 A
Factory setting
Full
Liquid
pipe
Outdoor
unit
Gas
pipe
* E unit is for
5C100VA only.
Charge hose
(for R410A)
MXZ-4C80VA
10.5 A
15.5 A
Factory setting
Full
En-6

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