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2. Lift up the top cover about 1
following the direction shown in Fig. 17.
Fig. 17 — Removing the Top Cover
3. Follow the steps below when removing the cover of
electric control box:
4. Remove the screws as shown in Fig. 18.
Fig. 18 — Removing the Electronic Control Box
Cover Screws
5. Push the cover about
3
/
8
shown in Fig. 19.
Fig. 19 — Removing the Electronic Control Box
Cover
/
in. and then push it
5
8
in. and then lift up the cover as
Completing Electrical Connections —
pipe work is complete, the electrical supply can be connected
by routing the cable through the appropriate casing holes or
knockouts and connecting the supply and ground cables to the
unit's power terminals.
Be sure the power wiring and control wiring do not cross, as
this might cause disturbance on the controls side.
Use 2-core stranded shielded twisted pair communication
wire. Make sure the control wire does not form a closed loop.
The control wire is polarity sensitive. Figures 20 and 21 show
how to connect the control wiring between the MDC and the
indoor unit. Wiring length limitations must be follow to avoid
any communication interference.
For typical communication wiring diagrams and MDC
wiring see Fig. 22-24.
MDC
P Q
Fig. 20 — 2-Core Stranded Shielded Twisted Pair
Communication Wire
(Available from Factory as an Accessory)
MDC
P Q
Fig. 21 — 2-Core Stranded Shielded Twisted Pair
Communication Wire (Field-Supplied)
15
After the
IDU
P Q
IDU
P Q
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