37MARAQ: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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C. WIRING INSTRUCTION
Wiring Precautions
WARNING - BEFORE PERFORMING ANY ELECTRICAL
WORK, READ THESE WARNINGS.
All wiring must comply with local and national electrical codes,
regulations and must be installed by a licensed electrician.
All electrical connections must be made according to the Electrical
Connection Diagram located on the panels of the indoor and outdoor
units.
If there is a serious safety issue with the power supply, stop work
immediately. Explain your reasoning to the client, and refuse to install the
unit until the safety issue is properly resolved.
Power voltage should be within 90-110% of rated voltage. (Insufficient
power supply can cause malfunction, electrical shock, or fire.
Installation of an external surge suppressor at the outdoor disconnect is
recommended.
If connecting power to fixed wiring, a switch or circuit breaker that
disconnects all poles and has a contact separation of at least 1/8in (3mm)
must be incorporated in the fixed wiring. The qualified technician must
use an approved circuit breaker or switch.
Only connect the unit to an individual branch circuit. Do not connect
another appliance to that outlet.
Make sure to properly ground the air conditioner.
Every wire must be firmly connected. Loose wiring can cause the
terminal to overheat, resulting in product malfunction and possible fire.
Do not let wires touch or rest against refrigerant tubing, the compressor,
or any moving parts within the unit.
If the unit has an auxiliary electric heater, it must be installed at least 40in
(1 m) away from any combustible materials.
To avoid getting an electric shock, never touch the electrical components
soon after the power supply has been turned off. After turning o the
power, always wait 10 minutes or more before you touch the electrical
components.
Ensure you do not cross your electrical wiring with your signal wiring.
This may cause distortion, interference or possibly damage to circuit
boards.
No other equipment should be connected to the same power circuit.
Connect the outdoor wires before connecting the indoor wires.
Connect Signal and Power Cables
Connection Diagrams
Fig. 19 — Size 12 (115V)
Fig. 20 — Sizes 9,12,18,24,30, 36K (208/230V)
NOTES:
1. Do not use the thermostat wire for any connection between indoor and
outdoor units.
2. All connections between the indoor and outdoor units must be made as
shown in Figure 20. The connections are sensitive to polarity and will
result in a fault code.
The outside unit’s terminal block is protected by an electrical wiring
cover on the side of the unit. A comprehensive wiring diagram is printed
on the inside of the wiring cover.
1. Remove the wire cover from the unit by loosening the 3 screws.
2. Dismount the caps on the conduit panel.
3. Temporarily mount the conduit tubes (not included) on the conduit
panel.
4. Properly connect both the power supply and low voltage lines to the
corresponding terminals on the terminal block.
5. Ground the unit in accordance with local codes.
6. Be sure to size each wire allowing several inches longer than the
required length for wiring.
7. Use lock nuts to secure the conduit tubes.
Fig. 21 — Select the through-hole
Before performing any electrical or wiring work, turn off the main
power to the system.
WA R N I N G
All wiring work must be performed strictly in accordance with the
wiring diagram located in the wire cover of the outdoor unit. Before
performing any electrical or wiring work, turn off the main power
to the system.
WA R N I N G
208/230V
Main
INDOOR
UNIT
OUTDOOR
UNIT
Indoor Unit
Power Supply
L1
L2
208/230V
1
2
208/230V
208/230V~60Hz
PE
1
2
3
Signal High
Voltage
Power to
Indoor Unit
3
Signal High
Voltage
Power Supply
Power Supply
GG
Wire Cover
Over
1-9/16"
(40mm)
Terminal block
Conduit panel
Connecting cable
Power supply cord
Select the appropriate through-hole according
to the diameter of the wire.
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