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8. OUTDOOR UNIT INSTALLATION MANUAL
Engineering Data book
8
4
SELECTION OF INSTALLATION
Before installation
Be careful to the following items before installation.
Length of refrigerant pipe
* Do not connect a refrigerant pipe shorter than
3 m
.
This may cause a malfunction of the compressor or
other devices.
Airtight test
1. Before starting an airtight test, further tighten the
spindle valves on the gas side and liquid side.
2. Pressurize the pipe with nitrogen gas charged from
the service port to the design pressure (4.15 Mpa) to
conduct the airtight test.
3. After the airtight test is completed, evacuate the
nitrogen gas.
Air purge
• For air purge, use a vacuum pump.
• Do not use refrigerant charged in the outdoor unit for
air purge. (The refrigerant for air purge is not
contained in the outdoor unit.)
Electrical wiring
Be sure to fix the power wires and hydro/outdoor
connecting wires with clamps so that they do not
contact with the cabinet, etc.
Earthing
WARNING
Make sure that proper earthing is provided.
Improper earthing may cause electric shock. For how
to check earthing, contact the dealer who installed the
Air to Water Heat Pump or a professional installation
company.
• Proper earthing can prevent charging of electricity on
the outdoor unit surface due to high frequency of the
frequency converter (inverter) in the outdoor unit, as
well as prevent electric shock. If the outdoor unit is
not properly earthed, you may feel electric shock.
• Be sure to connect earth wire. (grounding work)
Incomplete grounding cause an electric shock.
Do not connect ground wires to gas pipes, water
pipes, lightning rods or ground wires for telephone
wires.
Test Run
• Start test run when the water piping work is
completed and the system is filled with the proper
amount of water.
• Turn on the leakage breaker at least 12 hours before
starting a test run to protect the compressor during
startup.
CAUTION
Incorrect work may result in a malfunction or
complaints of customers.
Length of refrigerant
pipe connected to hydro/
outdoor unit
Item
3 m to 30 m
Addition of refrigerant is
unnecessary at the local site.
6-EN
Summary of Contents for ESTIA HWS-1102H-E
Page 3: ...2 1 INTRODUCTION ...
Page 7: ...6 2 SYSTEM OVERVIEW ...
Page 10: ...9 3 SYSTEM SPECIFICATION ...
Page 12: ...11 4 HYDRO UNIT ...
Page 44: ...43 5 OUTDOOR UNIT ...
Page 57: ...56 6 HOT WATER CYLINDER ...
Page 63: ...62 7 HYDRO UNIT INSTALLATION MANUAL ...
Page 107: ...105 8 OUTDOOR UNIT INSTALLATION MANUAL ...
Page 131: ...129 9 OWNER S MANUAL ...
Page 146: ...Air to Water Heat Pump Engineering Data Book Aug 2009 ...