Installation Procedure; Safety Cautions - Carrier 42NQV009E Service Manual

9-1. Safety Cautions

Power supply cord of parts of appliance for outdoor use shall be at least polychloroprene sheathed flexible
cord (design H07RN-F), or cord designation 245 IEC66. (1.5 mm
accordance with national wiring regulations.)
CAUTION
• THIS AIR CONDITIONER USES THE NEW HFC REFRGERANT (R410A), WHICH DOES NOT
DESTROY THE OZONE LAYER.
R410A refrigerant is apt to be affected by impurity such as water, oxidizing membranes, and oils because
the pressure of R410A refrigerant is approx. 1.6 times of refrigerant R22. As well as the adoption of this new
refrigerant, refrigerating machine oil has also been changed. Therefore, during installation work, be sure that
water, dust, former refrigerant, or refrigerating machine oil does not enter into the refrigerating cycle of a
new-refrigerant air conditioner.
To avoid mixing refrigerant and refrigerating machine oil, the sizes of charging port connecting sections on
the main unit are different from those for the conventional refrigerant, and different size tools are also
required. Accordingly, special tools are required for the new refrigerant (R410A) as shown below. For
connecting pipes, use new and clean piping materials with high-pressure withstand capabilities, designed for
R410A only, and ensure that water or dust does not enter. Moreover, do not use any existing piping as its
pressure withstand may be insufficient, and may contain impurities.
CAUTION
This appliance must be connected to the main power supply by means of a circuit breaker or a switch with a
contact separation of at least 3 mm in all poles.
The installation fuse (25A ) must be used for the power supply line of this air
conditioner.

9. INSTALLATION PROCEDURE

For general public use
New Refrigerant Air conditioner Installation
To Disconnect the Appliance from the Main Power Supply
2
or more). (Shall be installed in
– 48 –
FILE NO. SVM-07018