20
Installation Procedure
English
Installation Procedure
2 Select the insulation of the refrigerant pipe.
• Insulate the gas side pipe referring to the
thickness according to the pipe size.
• øʪϑϑϩ˵ɇÃʒͱͱθϩʪΧʪθɇϩЇθʪͱ˙ߩߧঔ࣍ߤߡঐ࣎ɇʒ
humidity of 85% is the standard condition. If
installing in a high humidity condition, use one
grade thicker insulation by referring to the table
below. If installing in an unfavourable conditions,
use thicker one.
• Insulator’s heat-resistance temperature should be
ͱθʪϩ˵ɇߣߥߩঔ࣍ߢߣߡঐ࣎ࢋ
Pipe
Outer diameter
Insulation Type
(Cooling, Heating)
Remarks
General
[86°F(30°C),
85%]
High humidity
[86°F(30°C),
over 85%]
kťUđࡡĘ9ŵ
mm inch mm inch mm inch
Gas
pipe
6.35 1/4 13 1/2 19 3/4
Heating
resisting
temperature
over
248°F(120°C)
9.52~25.4 3/8~1 19 3/4 25 1
28.58~44.45
1-1/8 ~
1-3/4
19 3/4 32 1 1/4
50.8 2 25 1 38 1 1/2
• When installing insulation in places and
conditions below, use the same insulation that is
used for high humidity conditions.
<Geological condition>
– High humidity places such as shoreline, hot spring,
near lake or river, and ridge (when the part of the
building is covered by earth and sand.)
– Restaurant ceiling, sauna, swimming pool etc.
<Building construction condition>
– The ceiling frequently exposed to moisture and
cooling is not covered.
– e.g. The pipe is installed at a corridor of a dormitory
and studio or near an exit that opens and closes
frequently.
– The place where the pipe is installed is highly
humid due to the lack of ventilation system.
Step 12 Performing final check and
trial operation
1 Check the power supply between the outdoor unit and
the auxiliary circuit breaker.
• 1 phase power supply : L, N
2 Check the indoor unit and the ACU(AHU Control Unit)
Kit.
• Check that you have connected the power and
communication cables correctly.
3 Press K1 or K2 on the outdoor unit PCB to start and
end the test modes.
Key Push type Mode
Display
SEG 1 SEG 2 SEG 3 SEG 4
K1 Short
1st
Heating test mode
࣑ࠞ
2nd
Defrost test mode
࣑ࠟ
3rd End Key operation
K2 Short
1st
Aͱͱ˝ϩʪϑϩͱʒʪ࣑ࠠ
2nd Inverter check
3rd Pump down
4th Reserved
5th
On Device Inverter
Checker (Comp#1)
࣑ࠡ
6th
Auto test mode
࣑ࠢ
7th
Auto check
࣑ࠣ
(Install
commissioning
mode)
8th End Key operation
K3 Short 1st Reset
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