Mitsubishi Electric CITY MULTI PUHY-P-ZKMU-A Installation Manual page 20

[Fig. 11.2.1]
Ⓐ
Ⓑ
Ⓒ
A Cable strap
C Transmission cable
[Fig. 11.2.2] Connecting the cables
Ⓑ
Ⓐ
L1 L2 L3
Ⓐ
Ⓐ Power cables, transmission cables
Ⓓ
Ⓑ
Ⓑ Daisy-chain (transmission cables only)
Ⓒ Terminal blocks (TB1, TB3, TB7)
Ⓓ Make an alignment mark.
Ⓔ Install the ring terminals back to back.
Ⓐ
Ⓔ
Ⓒ
Connect the cables respectively to the power supply terminal block and the transmission terminal block. Erroneous connection does not allow the system to operate.
Never connect the power cable to the transmission terminal block. If connected, electrical parts will be damaged.
When connecting cables to TB7, check that the voltage is 20 VDC or below.
transmission cables and the power cable in the same conduit.)
Follow the tightening torque for each screw type as shown below. Be careful not to use excessive torque as this could damage the screw.
Terminal block (TB1, (M6 screw)): 2.5–2.9 [N·m]
Terminal block (TB3, TB7 (M3.5 screw)): 0.82–1.0 [N·m]
When tightening the screws, do not push the driver strongly to avoid damaging the screw.
Make an alignment mark with a permanent marker across the screw head, washer, and terminal after tightening the screws.
20
5 4
3 2 1
B Power cable
Ⓒ
Ⓓ
Ⓕ
Ⓐ Terminal block with loose screws
Ⓒ
Ⓑ Properly installed terminal block
Ⓒ Spring washers must be parallel to the terminal block.
Ⓑ
When using wire size AWG 14, AWG 12, or AWG 10, be sure to use
knockout hole 2.
When using wire size AWG 8 or AWG 6, be sure to use knockout hole 4.
When using wire size AWG 4, AWG 3, or AWG 2, be sure to use knockout
hole 3.
When using wire size AWG 3 / , AWG
0
hole 5.
suitable material.
2 Conduit tube installation
Open by hammering the knockout holes for the conduit tube located on the
base and the bottom part of the front panel.
When installing the conduit tube directly through the knockout holes, remove
the burr and protect the tube with masking tape.
Use the conduit tube to narrow down the opening if there is a possibility of
small animals entering the unit.
When taking the conduit tube out from the bottom part of the unit, caulk
around the tube opening to prevent water penetration.
Ⓐ Control box
Ⓑ Power supply terminal block (TB1)
Ⓒ Transmission cable
Ⓔ
Ⓓ Terminal block for indoor-outdoor transmission cable (TB3)
Ⓔ Terminal block for centralized control transmission cable (TB7)
Ⓕ Ground screw
2 / , or AWG 0, be sure to use knockout
0