Hitachi RAM-52QH5, Service Manual, Page: 20 / 104

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Screw for ground, earth screw
Outdoor Unit
Wiring pattern
Indoor Unit
Fig. 1
Power cord
Screw
Insulating plate
Cord band
Connecting cord
C D
C1 D1
Indoor unit No. 1
Screw for ground, earth screw
Screw for ground, earth screw
For Indoor unit No. 1
Terminal board
Terminal board
Connecting cord
Ø1.6 or 2.0
Green-and-
Yellow
C D
C2 D2
Indoor unit No. 2
Screw for ground, earth screw
Screw for ground, earth screw
For Indoor unit No. 2
Terminal board
Terminal board
Green-and-
Yellow
C D
C3 D3
L N
Indoor unit No. 3
Screw for ground, earth screw
Screw for ground,
earth screw
For Indoor unit No. 3
Terminal board
Terminal board
Terminal board
Connecting cord
Ø1.6 or 2.0 Connecting cord
Ø1.6 or 2.0
Green-and-Yellow
Green-and-Yellow
AC 220V~240V ONLY
L N
INDOOR 1
C1 D1 C2 D2
INDOOR 2
C3 D3
INDOOR 3
Connection of the connecting cords and power cord. (Outdoor unit)
RAM-53QH5
WARNING
!
WARNING
!
WARNING
!
CAUTION !
CAUTION
!
Connecting cord should be connected according to Fig.1, that the Indoor unit No. shall match with terminal board No.
of Outdoor unit.
Be sure to fix the connecting cord with the band as shown below. Otherwise water leakage causes short circuit or faults.
Bind connecting cords to
make them fit between the
convex sections.
Earth wire
Earth
Circuit breaker
L N C
1
D
1
C
2
D
2
C
3
D
3
Indoor unit 1 Indoor unit 2 Indoor unit 3
Terminal indications
Grounding rod (optional)
Earth line and grounding rod are not supplied.
Please use optional items below.
•
•
•
•
•
•
•
( )
If earth line cannot be taken from
the power supply connection, use
the optional grounding rod to do
earthing.
Type of grounding rod
SP-EB-2
Length
900mm
Connection of the power cord and connecting
cord
Securely screw in the power cord
and connecting cord so that it will not
get loose or disconnect.
Tightening torque reference value:
1.2 to 1.6 N•m (12 to 16 kgf•cm)
Excessive tightening may damage
the interior of the cord requiring
replacement.
Power cord and
Connecting cord
To prevent a connection error, connecting cords
should be bundled and taped to each respective
pipe. If connecting cords are mixed with other indoor
units, a refrigeration cycle abnormality may occur,
causing dripping.
Leave some space in the connecting cord for maintenance purpose
and be sure to secure it with the cord band.
Secure the connecting cord along the coated part
of the wire using the cord band. Do not exert
pressure on the wire as this may cause
overheating or fire.
When putting two connecting cords through the band.
•
Hold the handle of the side cover, slide down and take off the corner hook, then pull. Reverse these steps when installing.