Installation Of Electrical Wires Summary; New Refrigerant ( R410A) - Zanussi ZS12V70CCHI Service Manual

5.6.4 Checking the Drainage
• Open and lift the indoor unit front panel.
• Check the drainage
– Carefully pour a glass of water on the evaporator.
– Ensure the water flows through the drain hose of the indoor unit without any leakage and goes out the drain exit.
• Drain piping
– The drain hose should point downward for easy drain flow.

5.7 Installation of Electrical Wires Summary

5.7.1 Installation of Indoor Electric Wires
• Open the front panel and remove the wiring cover by loosening the screw.
• Route the power connection cable and signal control wire (for heap pump model only) from back of the indoor unit and pull it
toward the front through the wiring hole for connection.
Connect and screw the wires onto the terminal block as identified by their colours.
• Wrap wires that are not connected with insulating tape so that they do not touch any electrical or metal parts
• Secure the wires firmly with the cable clamp.
• Put the wiring cover back and screw it.
• Reinstall the front panel.
– Do not extend the power cable conductor by cutting.
5.7.2 Installation of Outdoor Electric Wires
• Remove the terminal cover on the right side plate of outdoor unit by loosening the screw.
• Take off wire cable clamp. Connect and screw the power connection cable and signal control wire (for heap pump model only)
onto the terminal block following corresponding identification numbers and colours on the terminal blocks of indoor and outdoor
units.
• To prevent water from entering, make a trap ("U") in the connection wires
• Wrap wires that are not connected with insulating tape so that they do not touch any electrical or metal parts.
• Fix the power connection wires with wire clamps.
• Reinstall the handle.
NOTE: After confirming the above conditions, prepare the wiring as follows:
• The screws which fasten the wiring to the terminal block may come loose from vibrations during transportation.
• Check and make sure all screws are well fixed. Otherwise, it could burn-out of the wires.
• Be sure the circuit capacity is sufficient.
• Ensure the starting voltage is maintained at over 90% of the rated voltage marked on the nameplate.
• Confirm that the cable thickness is as specified in the power source specification.
• The following may be caused by voltage drop: Vibration of a contactor, which will damage the contact point, fuse blowing,
disturbance of the normal function of the overload.
• The means for disconnection from a power supply shall be incorporated in the fixed wiring and have an air gap contact
separation of at least 3mm in each active (phase) conductor.

6. NEW REFRIGERANT ( R410A)

Formula : 50% R32 (CH2F2) + 50% R125 (CHF2CF3)
The most notable difference between R-410A and R-22 is the higher operating pressures (approximately 50% higher on both the
discharge side and the suction side).
For example, a high-efficiency air conditioners R-22 typically operates with a suction pressure of about 5 bars and a discharge
pressure of about 17 bars at an outdoor temperature of 35°C. With R-410A, the same unit will operate under the same conditions
with a suction pressure of 8 bars and a discharge pressure of 27 bars. (Note that in most cases, equipment designed for R-22
cannot use R-410A because of this difference in operating pressures, so retrofitting an existing R-22 system is normally not an
option.)
Today R-410A is most popular refrigerant in HVAC field both because it is an HFC (hydro fluorocarbon), and because its greater
efficiency allows for the design and use of smaller air conditioning equipment.
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