Installation Method; Part Prepared At Site - Mitsubishi Electric G-50A Installation Manual

5 Installation method

1. Parts prepared at site
1 Prepare an electric box.
2 Prepare lock nuts and bushing that match the conduit.
3 Prepare an M-NET transmission line CVVS(2-wire):
2
1.25mm (AWG 16) or equivalent.
4 DC power supply line (3-conductor): Provide
2
0.75mm (AWG 18) or greater.
2. Installation method
1 Secure the space shown on the right when installing the electric box.
2 When installing the controller on the electric box, the controller will be shifted by 1mm (1/32 in) to the left as shown above.
NOTE
* When installing two controllers horizontally in parallel, secure a clearance of 30mm (1-3/16 in) or more between the products.
When installing vertically with the same clearance, removing of the cover will be difficult.
* When connecting a LAN and RS-232C, a space for the connector and wiring is required. Provide this space between this unit
and the rear of the electric box.
It varies depending on the specifications of the LAN cable that is procured, but the LAN connector may protrude approximately
20mm (25/32 in) from the bottom of the unit cabinet. Provide a cable with the smallest possible connector to secure space.
Reference example) Example of installation when a 67mm (2-5/8 in) deep electric box is used with a 30mm (1-3/16 in) thick wall.
Central controller
(1-3/16)
3 Connect the M-NET transmission line (centralized control line which is connected to TB7 of the outdoor unit) to M-NET transmis-
sion line terminal A and B. (Non Polarity)
Connect the DC power line from the power supply unit (PAC-SC50KUA) to the DC power supply terminal block of this device.
There is a 12VDC and a GND polarity.
* Type of wire. Use the cables which comply with the following specifications or equivalent.
M-NET transmission line:
CVVS 1.25mm
CPEVS ø1.2mm/AWG 17 (PE-insulated, PVC-sheathed shield communication cable)
MVVS 1.25mm
DC power line: 0.75mm
CAUTION
* Do not connect the AC power line to the M-NET and
POWER (DC12V) terminal blocks of this device. It may
cause a failure.
* Do not connect to the M-NET transmission line of indoor
unit control line which is connected to TB3 of the outdoor
unit.
* The conduit outlet faces only vertically. When leading the
line out from above, seal the port so that water does not
enter along the transmission line and DC power supply
line.
4 Securely seal the line lead-in port with putty to prevent the
entry of dew, water and insects, etc.
* Seal the connecting section of the electric box and conduit with
putty.
Wall
Electric box
LAN cable
Approx. 40mm
(1-9/16)
57
(2-1/4)
mm
30mm 67mm
(2-5/8)
( ): in
2
/AWG 16 (PVC-insulated, PVC-sheathed shield control cable)
2 /AWG 16 (PVC-insulated, PVC-sheathed shield control cable)
2 /AWG 18 or greater 3-conductor power line
30 (1-3/16)
The controller outline
Clearance around the controller
DC power line
M-NET transmission line
Bushing
M-NET transmission line
and DC power line
– 4 –
Center of electric box
1 (1/32)
181 (7-1/8) 179 (7-15/32)
30 (1-3/16)
120
Center the controller
(4-23/32)
Controller rear surface
M-NET
A B
When not using
bridge wiring
*When using bridge wiring of the shield,
use the S-terminal as shown below.
Conduit
Lock nut
Wall
Electric box
Seal with putty
Unit: mm (in)
30 (1-3/16)
Electric box
(Shaded section)
POWER
S 12VDC GND
12VDC : +12V
GND : 0V