Installation Of New Refrigerant Air To Water Heat Pump - Toshiba HWS-802H-E Installations-Handbuch

Air to Water Heat Pump
• When the Air to Water Heat Pump cannot cool or heat water well, contact the dealer from whom you
purchased the Air to Water Heat Pump as refrigerant leakage is considered as the cause.
In the case of repair that requires refill of refrigerant, ask service personnel about details of the repair.
The refrigerant used in the Air to Water Heat Pump is harmless.
Generally, the refrigerant does not leak. However, if the refrigerant leaks in a room and a heater or stove burner in
the room catches fire, it may generate toxic gas.
When you ask service personnel for repairing refrigerant leakage, confirm that the leakage portion has been
completely repaired.
• Conform to the regulations of the local electric company when wiring the power supply.
Inappropriate grounding may cause electric shock.
• Do not install the Air to Water Heat Pump in a location subject to a risk of exposure to a combustible gas.
If a combustible gas leaks, and stays around the unit, a fire may occur.
• Install the refrigerant pipe securely during the installation work before operating the Air to Water Heat Pump.
If the compressor is operated with the valve open and without the refrigerant pipe, the compressor sucks air and the
refrigeration cycle is overpressurized, which may cause a burst or injury.
• For the refrigerant recovery work (collection of refrigerant from the pipe to the compressor), stop the
compressor before disconnecting the refrigerant pipe.
If the refrigerant pipe is disconnected while the compressor is working with the valve open, the compressor sucks air
and the refrigeration cycle is overpressurized, which may cause a burst or injury.
New Refrigerant Air to Water Heat Pump Installation
• THIS AIR TO WATER HEAT PUMP ADOPTS THE NEW HFC REFRIGERANT (R410A) WHICH DOES NOT
DESTROY OZONE LAYER.
• The characteristics of R410A refrigerant are ; easy to absorb water, oxidizing membrane or oil, and its pressure is
approx. 1.6 times higher than that of refrigerant R22. Accompanied with the new refrigerant, refrigerating oil has also
been changed. Therefore, during installation work, be sure that water, dust, former refrigerant, or refrigerating oil does
not enter the refrigerating cycle.
• To prevent charging an incorrect refrigerant and refrigerating oil, the sizes of connecting sections of charging port of
the main unit and installation tools are changed from those for the conventional refrigerant.
• Accordingly the exclusive tools are required for the new refrigerant (R410A).
• For connecting pipes, use new and clean piping designed for R410A, and please care so that water or dust does not
enter.
To Disconnect the Appliance from Main Power Supply
• This appliance must be connected to the main power supply by means of a switch with a contact separation of at
least 3 mm.
• The installation fuse 25 A (All type fuse can be used) must be used for the power supply line of this unit.
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INSTALLATION OF NEW REFRIGERANT
AIR TO WATER HEAT PUMP
• The R410A refrigerant is more susceptible to impurities such as water, oxide membrane, oils, and fats. With the
adoption of the new refrigerant, refrigerating oil has also been changed.
Be careful so that water, dust, conventional refrigerant, and/or conventional refrigerating oil do not enter the
refrigerating cycle of the new refrigerant Air to Water Heat Pump.
• To prevent different refrigerant or refrigerating oil being mixed, the sizes of the charging port of the unit and the
installation tool connecting sections are different from the conventional refrigerant. Accordingly the following
exclusive tools are required for the new refrigerant R410A.
WARNING
CAUTION
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