GB - 7
42HQM
E N G L I S H
Installation
Indoor unit wiring
• Lift the front panel up to the top of the unit and the front panel
will be separated from the unit.
• Detach the terminal block cover by removing the two screws.
• Connect the electrical connection cord with the screws to the
terminal block of the indoor unit.
Also connect the signal line.
(Refer to the wiring diagram inside the frame grille and caution
label on the frame grille.)
• The air conditioner always requires grounding.
• Be sure to comply with local codes when running the wire from
the indoor unit to the outdoor unit.
• Every wire must be connected firmly.
• During installation, proceed first with refrigerant
connections between indoor and outdoor units, and only
then make the electrical ones; similarly, when
disassembling, disconnect the electrical wiring first and
then refrigerant connections.
Heat pump
(42HQM 009-012)
For detailed wiring connections, refer to page 11.
• Reinstall the terminal block cover with the screws after wiring.
WARNING:
Check that the Emergency button is correctly inserted into its
hole in the cover and is not pushed in.
• Fit the front panel to the latch of the frame grille.
CAUTION:
42HQM 009-012
Make certain that the live wire (1), the neutral wire (2) and the
signal one (3) are connected to the corresponding terminals 1, 2
and 3 in the outdoor unit.
Miswiring may cause permanent damage of the system.
NOTE:
• Incorrect wiring causes malfunction of the unit and electric
shock.
• Check local electrical codes and also any specific wiring
instructions or limitations.
• For right-hand piping, connect the connection cord and then
lead the pipe to the right.
• The ground connection between indoor and outdoor units is made
with the ground connection cable.
• Unit must be installed according to applicable national
installation standards.
• Power is provided to the unit through the outdoor unit power
cord only.
• No power cord or plug are supplied with the indoor unit.
Routing the drain hose and refrigerant
piping
• Tie together the refrigerant pipe, the drain hose, and the
electrical connection cord.
• Route the refrigerant piping in the required direction, and bind
the drain hose and the electrical connection cord together with
fastening tape.
The drain hose should be at the bottom.
• For left-hand piping, fit the pipes and the wiring into the recess at
the back of the unit.
Indoor unit piping
Left-hand piping
Bind with fastening tape
Drain hose