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Air to Water Heat Pump
Installation Manual
8
Earthing
Connect the earth wire properly following applicable
technical standards.
Connecting the earth wire is essential to preventing
electric shock and to reducing noise and electrical
charges on the outdoor unit surface due to the high-
frequency wave generated by the frequency converter
(inverter) in the outdoor unit.
If you touch the charged outdoor unit without an earth
wire, you may experience an electric shock.
9
Finishing
After the refrigerant pipe, Hydro / Outdoor connecting
wires have been connected, cover them with finishing
tape and clamp them to the wall with off-the-shelf
support brackets or their equivalent.
Keep the power wires and Hydro / outdoor connecting
wires off the valve on the gas side or pipes that have
no heat insulator.
10
Test run
• Turn on the leakage breaker at least 12 hours before
starting a test run to protect the compressor during
startup.
• Check the following before starting a test run:
•
That all pipes are connected securely without
leaks.
•
That the valve is open.
If the compressor is operated with the valve
closed, the outdoor unit will become
overpressurized, which may damage the
compressor or other components.
If there is a leak at a connection, air can be sucked in
and the internal pressure further increases, which may
cause a burst or injury.
• Operate the air to water heat pump in the correct
procedure as specified in the Owner’s Manual.
Please refer to the Hydro unit installation manual for
the detail of the test run.
11
Annual
maintenance
• For an air to water heat pump system that is
operated on a regular basis, cleaning and
maintenance of the Hydro / outdoor units are
strongly recommended.
As a general rule, if an Hydro unit is operated for
about 8 hours daily, the Hydro / outdoor units will
need to be cleaned at least once every 3 months.
This cleaning and maintenance should be carried out
by a qualified service person.
Failure to clean the Hydro / outdoor units regularly
will result in poor performance, icing, water leaking
and even compressor failure.
12
Air to water heat
pump operating
conditions
For proper performance, operate the air to water heat
pump under the following temperature conditions:
If air to water heat pump is used outside of the above
conditions, safety protection may work.
* Heater operation in more than 35 °C
Cooling operation
10 °C to 43 °C
Heating operation
–20 °C to 25 °C
Hot water operation
–20 °C to 43 °C*
22-EN
Summary of Contents for HWS-1105H-E
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