Installation Guide

Page 22mrcool.com
Outdoor Unit Installation
BEFORE PERFORMING ELECTRICAL
WORK, READ THESE REGULATIONS
1.
All wiring must comply with local and
national electrical codes, and must be
installed by a licensed electrician.
2. All electrical connections must be made
according to the Electrical Connection
Diagram located on the panels of the indoor
and outdoor units.
3. 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 proper-
ly resolved.
4. Power voltage should be within 90-100%
of rated voltage. Insufficient power supply
can cause malfunction, electrical shock, or
fire.
5. Circuit, including any switches, should
have a capacity 1.5 times the maximum unit
current (amps).
6. The qualified technician must use an
approved circuit breaker or switch that
disconnects all poles and has has a contact
separation of at least 1/8in (3mm).
7. Do not connect another appliance to the
same circuit.
8. Make sure to properly ground the air
conditioner.
9. Every wire must be firmly connected.
Loose wiring can cause the terminal to
overheat, resulting in malfunction and possi-
ble fire.
10. Do not let wires touch or rest against
refrigerant tubing, the compressor, or any
moving parts within the unit.
11. If the unit has an auxiliary electric heater,
it must be installed at least 40in (1 meter)
away from combustible materials.
If you will install the unit on a wall-mounted
bracket, do the following:
TO REDUCE VIBRATION OF WALL-
MOUNTED UNIT
Before installing a wall-mounted unit, make
sure that the wall is made of solid brick,
concrete, or of similarly strong material.
The wall must be able to support at
least four times the weight of the unit.
1. Mark the position of bracket holes based on
dimensions in the Unit Mounting Dimensions chart.
2. Pre-drill the holes for the expansion bolts.
3. Clean dust and debris away from holes.
4. Place a washer and nut on the end of each expan-
sion bolt.
5. Thread expansion bolts through holes in mounting
brackets, put mounting brackets in position, and
hammer expansion bolts into the wall.
6. Check that the mounting brackets are level.
7. Carefully lift unit and place its mounting feeton
brackets.
8. Bolt the unit firmly to the brackets.
If allowed, you can install the wall-mounted
unit with rubber gaskets to reduce vibration
and noise.
Step 4: Connect signal and power cables
The outside unit’s terminal block is protected by an
electrical wiring cover on the side of the unit. A com-
prehensive wiring diagram is printed on the inside of
the wiring cover.