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1.5. Before starting the test run
Caution:
•
Turn on the power at least 12 hours before starting operation.
- Starting operation immediately after turning on the main power switch can result
in severe damage to internal parts. Keep the power switch turned on during the
operational season.
•
Do not touch the switches with wet fingers.
- Touching a switch with wet fingers can cause electric shock.
•
Do not touch the refrigerant pipes during and immediately after operation.
2. Indoor unit accessories
The unit is provided with the following accessories:
Part No.
Accessories
1
Insulation pipe
2
Tie band
3
Drain socket
4
Washer
5
Installation manual
6
Operation manual
3. Selecting an installation site
•
Select a site with sturdy fixed surface sufficiently durable against the weight of
unit.
•
Before installing unit, the routing to carry in unit to the installation site should be
determined.
•
Select a site where the unit is not affected by entering air.
•
Select a site where the flow of supply and return air is not blocked.
•
Select a site where refrigerant piping can easily be led to the outside.
•
Select a site which allows the supply air to be distributed fully in room.
•
Do not install unit at a site with oil splashing or steam in much quantity.
•
Do not install unit at a site where combustible gas may generate, flow in,
stagnate or leak.
•
Do not install unit at a site where equipment generating high frequency waves
(a high frequency wave welder for example) is provided.
•
Do not install unit at a site where fire detector is located at the supply air side.
(Fire detector may operate erroneously due to the heated air supplied during
heating operation.)
•
When special chemical product may scatter around such as site chemical plants
and hospitals, full investigation is required before installing unit. (The plastic
components may be damaged depending on the chemical product applied.)
•
If the unit is run for long hours when the air above the ceiling is at high
temperature/ high humidity (due point above 26 °C), due condensation may be
produced in the indoor unit. When operating the units in this condition, add
insulation material (10-20 mm) to the entire surface of the indoor unit to avoid
due condensation.
3.1. Install the indoor unit on a ceiling strong enough
to sustain its weight
Warning:
The unit must be securely installed on a structure that can sustain its weight.
If the unit is mounted on an unstable structure, it may fall down causing
injuries.
•
This unit should be installed in rooms which exceed the floor space spec-
ified in outdoor unit installation manual. Refer to outdoor unit installation
manual.
•
Install the indoor unit at least 2.5 m above floor or ground level. The indoor
unit should not be accessible to the general public.
•
Refrigerant pipes connection shall be accessible for maintenance pur-
pose.
- During and immediately after operation, the refrigerant pipes are may be hot
and may be cold, depending on the condition of the refrigerant flowing through
the refrigerant piping, compressor, and other refrigerant cycle parts. Your
hands may suffer burns or frostbite if you touch the refrigerant pipes.
•
Do not operate the air conditioner with the panels and guards removed.
- Rotating, hot, or high-voltage parts can cause injuries.
•
Do not turn off the power immediately after stopping operation.
- Always wait at least five minutes before turning off the power. Otherwise, water
leakage and trouble may occur.
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3.2. Securing installation and service space
Secure enough access space to allow for the maintenance, inspection, and
replacement of the motor, fan, drain pump, heat exchanger, and electric box in one
of the following ways.
Select an installation site for the indoor unit so that its maintenance access space will
not be obstructed by beams or other objects.
(1) When a space of 300 mm or more is available below the unit between the unit
and the ceiling (Fig. 3.2.1)
• Create access door 1 and 2 (450 x 450 mm each) as shown in Fig. 3.2.2.
(Access door 2 is not required if enough space is available below the unit for a
maintenance worker to work in.)
(2) When a space of less than 300 mm is available below the unit between the unit
and the ceiling (At least 20 mm of space should be left below the unit as shown in
Fig. 3.2.3.)
• Create access door 1 diagonally below the electric box and access door 3
below the unit as shown in Fig. 3.2.4.
or
• Create access door 4 below the electric box and the unit as shown in Fig. 3.2.5.
[Fig. 3.2.1] (P.2)
[Fig. 3.2.2] (Viewed from the direction of the arrow A) (P.2)
[Fig. 3.2.3] (P.2)
[Fig. 3.2.4] (Viewed from the direction of the arrow B) (P.2)
[Fig. 3.2.5] (Viewed from the direction of the arrow B) (P.2)
A Electric box
C Ceiling beam
E Access door 1 (450 mm x 450 mm)
G Supply air
I Bottom of indoor unit
K Access door 4
3.3. Combining indoor units with outdoor units
For connecting indoor units with outdoor units, refer to the outdoor unit installation
manual.
B Ceiling
D Access door 2 (450 mm x 450 mm)
F Maintenance access space
H Intake air
J Access door 3
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