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THERMA V
Split Type
7. Electrical Wiring
7.2 Wiring Procedure for Power Cable and Connecting Cable
1. Disassemble the side panel from the outdoor unit by loosing screws.
2. Connect Power cable to Main Power Terminal and Connecting cable to Control Terminal, respectively.
See below figure for detailed information. When connecting earth cable, the diameter of cable should bebigger
than 1.6mm2 to secure safety. The earth cable is connected to the terminal block where earthsymbol
marked.
3. Use cable clamps (or cord clamps) to prevent unintended move of Power cable and Connecting cable.
4. Reassemble the side panel to the outdoor unit by fastening screws.
Side Panel
Side Panel
Insulation pad
Insulation pad
Note
After checking and confirming following conditions, start wiring work.
1. Secure dedicated power source for the Air-to-Water heat pump. The wiring diagram (attached inside the control
box of the indoor unit) is presenting related information.
2. Provide a circuit breaker switch between power source and the outdoor unit.
3. Although it is very rare case, sometimes the screws used to fasten internal wires can be loosen due to the
vibration while product transportation. Check these screws and make it sure if they are all fastened tightly. If not
tightened, burn-out of the wire can be occurred.
4. Check the specification of power source such as phase, voltage, frequency, etc.
5. Confirm that electrical capacity is sufficient.
6. Be sure that the starting voltage is maintained at more than 90 percent of the rated voltage marked on the name
plate.
7. Confirm that the cable thickness is as specified in the power sources specification. (Particularly note the relation
between cable length and thickness.)
8. Provide an ELB(electric leakage breaker) when the installation place is wet or moist.
9. The following troubles would be caused by abnormal voltage supply such as sudden voltage increasing or
voltage drop-down.
•
Chattering of a magnetic switch (frequent on and off operation)
•
Physical damage of parts where magnetic switch is contacted
•
Break of fuse
•
Malfunction of overload protection parts or related control algorithms.
•
Failure of compressor start up
10.Ground wire to ground outdoor unit to prevent electrical shock.
Control Terminal
Control Terminal
(Terminal for
(Terminal for
Connecting Cable)
Connecting Cable)
Main Power
Main Power
Terminal
Terminal
(Terminal for
(Terminal for
Power Cable)
Power Cable)
Cable Clamp
Cable Clamp
(or Cord Clamp)
(or Cord Clamp)
Cable Clamp
Cable Clamp
(or Cord Clamp)
(or Cord Clamp)
When connecting power cable, make sure the
When connecting power cable, make sure the
rubber bushes are properly attached in knock-out
rubber bushes are properly attached in knock-out
holes after removing the Insulation pad.
holes after removing the Insulation pad.
Indoor
Unit
Water
Water
Outlet
Inlet
※ According to each model, external appearance of
outdoor/indoor units and Water In/out directions
could be different. For more detail information,
refer to the drawing of each model.
Design and installation
is
21
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