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8. OUTDOOR UNIT INSTALLATION MANUAL
Engineering Data book
8
8 EARTHING
WARNING
• Be sure to connect earth wire. (grounding work)
Incomplete grounding cause an electric shock.
Connect the earth line properly following applicable technical standards.
Connecting an earth line is essential to prevent electric shock and to reduce noise and electricity charge on the
outdoor unit surface due to high frequency generated by the frequency converter (inverter) in the outdoor unit.
If you touch the charged outdoor unit without earth line, you may feel electric shock.
9 FINISHING
After the refrigerant pipe and the inter-unit wires have been connected, cover them with finishing tape and clamp
them to the wall with off-the-shelf support brackets or equivalent.
Keep the power wires and hydro/outdoor connecting wires off the valve on the gas side or pipes that have no heat
insulator.
10TEST RUN
• The test run, on the outdoor unit, can only be completed when the complete Air to Water Heat Pump system has
been installed. (Hydro unit, heating system or/and the others)
• Please refer to the hydro unit installation manual for the details of the test run procedure.
11ANNUAL MAINTENANCE
• For Air to Water system which is operated regularly, 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-month. This cleaning and maintenance shall be carried out by a qualified person.
Failure to clean the hydro/outdoor units regularly will result in poor performance, icing, water leaking and even
compressor failure.
18-EN
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