21
1 2
3 1 2
3 1 2
3
A
B
C
Attach the label
1
2
Ground
1
2
1
3 4 5 6 7 8 9 10 11 12
1 2
4
1 2
4
Indoor unit A
Outdoor unit A
Indoor unit B
Indoor unit C
BK W R
R
R
1 2
4
BK W
BK W
BK W R BKW R BKW R
A
B
C
Label A
Label B
Label C
Inter-unit cables
φ
1.0 (not provided)
Inter-unit cables
φ
1.0 (not provided)
Inter-unit cables
φ
1.0 (not provided)
A is the indoor unit with
refrigerant tubing that is
connected to service valve
A (top) of the outdoor unit.
B is the indoor unit with
refrigerant tubing that is
connected to service valve
B (top) of the outdoor unit.
C is the indoor unit with
refrigerant tubing that is
connected to service valve
C (top) of the outdoor unit.
A
B
C
Fasten the
cable with cable
fasteners.
Power cable (not provided)
(
φ
2.0 mm: Less than 15 m)
(
φ
2.6 mm: Less than 20 m)
(
φ
3.5 mm: Less than 26 m)
Power:
Single-phase,
220 240 V
Power switch
(not provided)
Terminal board
Terminal board
Terminal board
Terminal board
5-6. Wiring Instructions for the Outdoor Unit
●
The below explanation uses model (GRF244MR5IAA)
as an example. With model (GRF194MR5IAA), there
is no terminal block C.
●
Be sure to correctly align inter-unit cables A, B, and C.
●
Never use
φ
2.6 mm VVF cable or a twisted-pair cable
for the inter-unit cable.
Be sure to perform grounding.
●
Attach a ground wire to either the
outdoor unit or indoor unit.
●
If there is a grounding terminal
inside the room, use the grounding
screw inside the indoor unit.
●
Be sure to apply the provided labels to both ends of the inter-unit
cables to prevent miswiring. The units will not function if the wiring
connections are incorrect.
●
Use a dedicated A/C circuit for power.
●
To make connections to the outdoor unit, remove
the inspection panel and tubing panel.
●
Do not bring the inter-unit cables or power cable
into contact with tubing or service valves.
●
Use outdoor unit cable fasteners and fasten the
inter-unit cables at the location where the cables
are double-sheathed.
●
Arrange the wiring so that the inter-unit cables are
contained in the inspection panel and tubing panel,
as shown in Fig. 32.
CAUTION
Fig. 32
