Control Box And Connecting Position Of Wiring - Mitsubishi Electric CITY MULTI PQRY-P200-YMF-B Manuel D'installation

9.2. Control box and connecting position
of wiring
1 Heat source unit
1. The service panel can be taken off by removing the three screws
along the top, leaning the panel forward, and lifting upwards. (see
diagram below)
A
A Service panel
2. Remove the screw on each side (right and left) of the control box
cover, then pull the cover down to remove it. (The illustration below
shows the control box with the cover removed.)
C
1 2 3 4 L1 L2
H
G
TB8
A Inverter board (INV board)
B Control board (MAIN board)
C Relay board
D Ten position
E One position
F Address switch
G Signal IN/OUT (1, 2 : UNIT ON/OFF, 3, 4 : PUMP INTERLOCK)
H Power source
I Transmission line
20
A
B
LD1
D E
F
M1 M2
L3 N M1 M2 S
TB3
TB1 TB7
I
3. Connect the indoor unit transmission line to transmission terminal
block (TB3), or connect the wiring between heat source units or the
wiring with the central control system to the central control terminal
block (TB7).
When using shielded wiring, connect shield ground of the heat source
unit transmission line to the earth screw (
ground of the line between heat source units and the central control
system transmission line to the shield (S) terminal of the central con-
trol terminal block (TB7) shield (S) terminal. In addition, in the case
of heat source units whose power supply connector CN41 has been
replaced by CN40, the shield terminal (S) of central control terminal
block (TB7) should also be connected to the ground (
4. When attaching an interlock to the water circuit pump, use the pump
interlock terminal block (TB8-3, 4). At this time, be sure to remove
the short-circuit wire attached to the terminal block.
A Control box
2 Wiring Procedure
When wiring at the site of installation, separate the power source lines
and transmission lines, and proceed with installation holding them in
proper bundles.
Also use the wiring mounting board and cable straps to hold the wires in
place. When installing pump interlock wiring on-site, use the same path
as the power source lines.
A
C
D
A Wiring mounting board
B Cable straps
C ø39 Knockout hole (Hole for the power supply)
D ø28 Knockout hole (Hole for the control wiring)
) and connect shield
).
A
D
C
B
B
B
D
C