Carrier 30AWH004HB User Manual

102
30AW
Maintenance
8
8.1 Refrigerant charge check
8.2 Cleaning the coil
This check becomes necessary after any refrigerant leak or after
replacement of the compressor.
The best method to correctly charge refrigerant is to completely empty
the refrigerant circuit using refrigerant recovery equipment.
Then charge the exact quantity of refrigerant according to the data
shown on the unit nameplate.
R-410A systems must be charged with liquid refrigerant.
Use the special recharging equipment (normally on the market) to
control the refrigerant correctly.
When it is necessary to recharge refrigerant, charge the specied
amount of new refrigerant according to the following steps:
1. Recover the refrigerant, and check no refrigerant remains in the
equipment.
2. Connect the charge hose to packed valve service port (see the
Check joint in the gure illustrated in chapter 3.4 Refrigerant
schematics).
3. Connect the charge hose of the vacuum pump adapter.
4. Place the handle of the gauge manifold Low in the fully opened
position, and turn on the vacuum pump’s power switch. Then,
evacuating the refrigerant in the cycle.
5. When the compound gauge’s pointer has indicated -0.1 MPa
( - 76 cmHg ), place the handle Low in the fully closed position, and
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6. Keep the status set as it is for 1 to 2 minutes, and ensure that the
compound gauge’s pointer does not return.
7. Set the refrigerant cylinder to the electronic balance, connect the
connecting hose to the cylinder and the connecting port of the
electronic balance, and charge liquid refrigerant.
If necessary, proceed as follows for more careful cleaning of the coil:
- Switch the mains supply OFF.
- Remove unit top cover by losening the xing screws and lifting
thecover. Carefully clean the coil with a vacuum cleaner from inside to
outside.
IMPORTANT: All maintenance operations must be performed by qualied personnel.
IMPORTANT:
- Never charge refrigerant exceeding the specied amount.
- If the specied amount of refrigerant cannot be charged, charge
refrigerant bit by bit in COOL mode.
- Do not carry out additional charging. When additional charging is
carried out if refrigerant leaks, the refrigerant composition changes
in the refrigeration cycle, that is characteristics of the heat pump
changes, refrigerant exceeding the specied amount is charged, and
working pressure in the refrigeration cycle becomes abnormally high
pressure, and may cause a rupture or personal injury.
- A cylinder with siphon enables liquid to be charged without the
cylinder turned upside down.(see the gure below)
With the same vacuum cleaner, remove the dust from inside the fan
compartment and the fan blades. Avoid any damage to the blades
which may cause future vibrations and noise.
Replace the unit cover and tighten the screws.
SM_30AW.indd 102 14-03-2011 14:46:27

Carrier 30AWH004HB Specifications

General

Brand	Carrier
Model	30AWH004HB
Category	Air Conditioner
Language	English