Mitsubishi Heavy Industries SCM71ZM-S1 Technical Manual page 357

Inverter multi-split system residential air-conditioners
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⑤ Installation of indoor unit
Work procedure
1. This units is designed for 2 x 2 grid ceiling.
If necessary, please detach the T bar temporarily before you install it.
If it is installed on a ceiling other than 2 x 2 grid ceiling, provide an inspection port on the control box side.
2. Arrange the suspension bolt at the right position (530mm530mm).
3. Make sure to use four suspension bolts and fix them so as to be able to hold 500N load.
4. Ensure that the lower end of the suspension bolt should be 97mm above the ceiling plane. Temporarily put the four lower nuts 140mm above the ceiling plane and the
upper nuts on distant place from the lower nuts in order not to obstruct hanging the indoor unit or adjust the indoor unit position, and then hang the indoor unit.
5. Adjust the indoor unit position after hanging it by inserting the level gauge (Packed together with the indoor unit.) attached on the package into the air supply port and
checking if the gap between the ceiling plane and the indoor unit is appropriate. (*) In order to adjust the indoor unit position, adjust the lower nuts while the upper
nuts are put on distant place. Confirm there is no backlash between the hanger plate for suspension bolt and the lower nut and washer.
* Use the level gauge only when OA spacer has been installed before hanging (④ 1-1 only).
Use level gauges as
refrence, adjust the
bottom to the face of
the OA spacer.
Ceiling panel
T-bar
⑥ Installation of panel
⑦ Interlocking with the indoor unit fan
◎Connect the Single split series and the VRF series to CnT on the indoor PCB and to CnD on the indoor PCB respectively. If a ventilation device is connected been geared
with the motion of indoor device (ON: DC12V output, OFF: 0V output), the ventilation device is operated/stopped.
◎Set it at "VENT LINK" by selecting "No. 11 VENT LINK SET" from the Functional setting by remote control. For details, refer to the "ELECTRIC WIRNG WORK INSTRUCTION"
of indoor unit.
(Example of circuit)
Indoor unit
OA spacer
140mm
97mm
Level gauge
(Packed together with
the indoor unit)
Tighten the panels to the brackets 3 and 4 with bolts.
For further details, refer to the installation manual of panel.
(Caution) Connect the connector of lover motor within the control box.
CNT (6P)
OR
CND (2P)
Control Bord
Connector
CnT Conector (the single split series)
1
2
3
Insulate #3 to #6
4
5
because these are used.
6
Connector: Made by MOLEX 5264-06
Terminal: Made by MOLEX 5263T
(Caution)
Although the indoor unit fan stops during the defrosting or oil return operation, the booster fan is operating.
Use a total heat exchanger, if necessary.
-
Suspension bolt
Correct
Nut (upper)
Unit
Flat washer
Spring washer
Nut (lower)
Touch the nut (lower) and
washer without any play
Ceiling surface
MC
MC
M
MC:Relay
M:Booster fan motor
CnD Conector (the VRF series)
1
2
Connector: Made by MOLEX 5264-02
Terminal: Made by MOLEX 5263T
356
-
'17 • SCM-T-225
Wrong
Unit
Play is left between the fixture and the
nut (lower) and washer.
Power source
PJZ012D074
B

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