Mitsubishi Electric City Multi PUHY-P72TKMU-A Installation Manual page 19

*2 : OC, OS1 and OS2 of the outdoor units in the same refrigerant system
are automatically identified. They are identified as OC, OS1 and OS2 in
descending order of capacity. (If the capacity is the same, they will be in
ascending order of their address number.)
4. In the case of indoor-outdoor transmission line, connect the shield ground
to the ground terminal . In the case of transmission lines for centralized
control, connect it to the shield terminal (S) on the terminal block for
centralized control (TB7). Furthermore, in the case of the outdoor units
whose power supply connector CN41 is replaced with CN40, short circuit the
shield terminal (S) and the ground terminal
[1] Supplied parts
This unit includes the following parts.
1 Band ··· 2 pcs.
[2] Preparation for installation
• Check that the main power on the outdoor unit is turned off.
• After turning off the main power, leave it turned off for at least 10 minutes before proceeding the installation work.
[3] Installation
(1) Thread the power source cable through the rubber bushing on the left side. (Refer to Fig. 1, Note 1, and Note 2.)
(2) Thread the unit wiring (sensor wiring) and the transmission cable through the rubber bushing on the right side. (Refer to Fig. 1, Note 1, and Note 2.)
(3) Hold the power source cable and the transmission cable in place respectively with the cable straps. (Refer to Fig. 1)
(4) Connect the cables respectively to the power supply terminal block and the terminal block for transmission line. (Refer to Fig. 1)
(5) Secure each rubber bushing with the supplied band. (Refer to Fig. 1 and Note 3)
Cable strap
Rubber bushing
Band
(field-installed)
Wiring from the unit
(wiring from trans box,
Power source cable
only YKMU model)
(field-wiring)
Note 1) Make sure the cables are not coming out of the rubber bushing cut. (Fig. 2 and Fig. 3)
Top view
Wiring
Wiring
Rubber bushing
Note 2) When threading the wiring through the rubber bushing, make sure the rubber bushing will not come off the sheet metal on the control box guard.
(Fig. 4 and Fig. 5)
Sheet metal
on the guard
Rubber bushing
<Fig. 4>
Note 3) When tying the supplied band around the rubber bushing, make sure to leave no gap between the ends. (Fig. 6 and Fig. 7)
Band
Overlapped
rubber bushing
<Fig. 6: Back of the rubber bushing>
in addition to the above.
Power supply terminal block
Transmission cable
<Fig. 1> (field-wiring)
Cut
Rubber bushing
(oval part)
Rubber bushing
(oval part)
Top view
<Fig. 2>
Sheet metal
on the guard
Rubber bushing
<Fig. 5>
Approx. 20 mm [13/16 in]
There is a gap
Cut on the
in the rubber
rubber bushing
bushing.
<Fig. 7: Back of the rubber bushing>
5. Fix the connected wires securely in place with the cable strap at the bottom
of the terminal block. External force applied to the terminal block may
damage it and may cause a short circuit, ground fault, or a fire.
6. When extending the transmission line, make sure to extend the shield cable
as well.
M-NET
board
Terminal block for
transmission line
Cable strap
Band
(field-installed)
Rubber bushing
Wiring from the unit (sensor wiring)
Cables are coming out of the rubber bushing.
Wiring
Cross-sectional view
<Fig. 3>
<<Important>>
When putting the band on the rubber
bushing, make sure the ends of the
rubber bushing overlap each other as
shown in Fig. 6.
Cut on
* If there is a gap, water from snow
the rubber
or rain may enter, resulting in
bushing
equipment damage.
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