S1
S2
S3
S1
S2
S3
208/230V
9
6. Electrical work
Warning:
In case of A-control wiring, there is high voltage potential on the S3 terminal caused by electrical circuit design that has no electrical insulation between power
#### +[&[5[^#
is energized. If isolator should be used between indoor unit and outdoor unit, please use 3-pole type.
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After completing installation and the wiring and piping of the indoor and
outdoor units, check for refrigerant leakage, looseness in the power supply
or control wiring, wrong polarity, and no disconnection of one phase in the
supply.
4V''\+#-
## &"~
Do not carry out this test on the control wiring (low voltage circuit) terminals.
Warning:
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Insulation resistance
After installation or after the power source to the unit has been cut for an extended
Q_ -
ing in the compressor. This is not a malfunction. Perform the following procedures.
1. Remove the wires from the compressor and measure the insulation resistance of
the compressor.
=& Q_ #-
ance dropped due the accumulation of refrigerant in the compressor.
3. After connecting the wires to the compressor, the compressor will start to warm
up after power is supplied. After supplying power for the times indicated below,
measure the insulation resistance again.
' -
' !Q_
for two to three hours.
(The time necessary to warm up the compressor varies according to atmos-
pheric conditions and refrigerant accumulation.)
'
compressor must be warmed up at least 12 hours to prevent breakdown.
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Caution:
##### #
is correct.
#&5#
- 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.
*5
Outdoor unit model
A12
A18
A24
A30
A36
A42
Outdoor unit power supply
Single, 208/230 V, 60 Hz Single, 208/230 V, 60 Hz Single, 208/230 V, 60 Hz Single, 208/230 V, 60 Hz Single, 208/230 V, 60 Hz Single, 208/230 V, 60 Hz
Breaker size
*1
15 A
15 A
25 A
30 A
30 A
30 A
Minimum circuit ampacity
13 A
13 A
18 A
25 A
25 A
26 A
Maximum rating of overcurrent protective device
15 A
20 A
30 A
40 A
40 A
40 A
W
irin
g
Wi
re
No
. ×
si
z
e
Outdoor unit power supply
2 × Min. AWG 14
2 × Min. AWG 14
2 × Min. AWG 12
2 × Min. AWG 10
2 × Min. AWG 10
2 × Min. AWG 10
Outdoor unit power supply earth
1 × Min. AWG 14
1 × Min. AWG 14
1 × Min. AWG 12
1 × Min. AWG 10
1 × Min. AWG 10
1 × Min. AWG 10
Indoor unit-Outdoor unit
*2
3 × AWG 16 (polar)
3 × AWG 16 (polar)
3 × AWG 16 (polar)
3 × AWG 16 (polar)
3 × AWG 16 (polar)
3 × AWG 16 (polar)
Indoor unit earth
*2
1 × Min. AWG 16
1 × Min. AWG 16
1 × Min. AWG 16
1 × Min. AWG 16
1 × Min. AWG 16
1 × Min. AWG 16
Remote controller-Indoor unit
*3 2 × AWG 22 (Non-polar) 2 × AWG 22 (Non-polar) 2 × AWG 22 (Non-polar) 2 × AWG 22 (Non-polar) 2 × AWG 22 (Non-polar) 2 × AWG 22 (Non-polar)
C
ircuit
rat
in
g
Outdoor unit L1-L2
*4
AC 208/230 V
AC 208/230 V
AC 208/230 V
AC 208/230 V
AC 208/230 V
AC 208/230 V
Indoor unit-Outdoor unit S1-S2
*4
AC 208/230 V
AC 208/230 V
AC 208/230 V
AC 208/230 V
AC 208/230 V
AC 208/230 V
Indoor unit-Outdoor unit S2-S3
*4
DC 24 V
DC 24 V
DC 24 V
DC 24 V
DC 24 V
DC 24 V
Remote controller-Indoor unit
*4
DC 12 V
DC 12 V
DC 12 V
DC 12 V
DC 12 V
DC 12 V
*1. Use earth leakage breaker (NV)
IMPORTANT
Make sure that the current leakage breaker is one compatible with higher harmonics.
Always use a current leakage breaker that is compatible with higher harmonics as this unit is equipped with an inverter.
The use of an inadequate breaker can cause the incorrect operation of inverter.
*2. Max. 45 m, 147 ft
If AWG13 used, Max. 50 m, 164 ft
If AWG13 used and S3 separated, Max. 80 m, 262 ft
*3. The 10 m, 30 ft wire is attached in the remote controller accessory. Max 1500 ft
< '; %' #
S3 terminal has DC 24 V against S2 terminal. However between S3 and S1, these terminals are NOT electrically insulataed by the transformer or other device.
Notes: 1. Wiring size must comply with the applicable local and national code.
5 Use copper supply wires.
^ 4*''/###
% !
%! # $ ;
Single phase
A-Control
Outdoor Unit
A-Control
Indoor Unit
Isolator
3 poles isolator
