4. How to Install the Outdoor Unit
First refer to Section 2. Installation Site Selection.
4-1. Wiring Instructions for the Outdoor Unit
Regulations on wire size differ from locality to locality. For field wiring requirements, please refer to your local electrical codes. Make sure that the installation fully complies with all local and national regulations.
(1)Remove access panel. (Fig. 41)
(2)Connect the power line according to the drawing on the panel side.
(3)Be sure to size each wire allowing approx. 4 in. (10 cm) longer than the required length for wiring. Store excess wiring inside the cabinet.
(4)When connections are completed, check that all connec- tions are correct as shown in the wiring system diagram on panel side.
(5)Be sure to ground the unit according to your local codes.
CAUTION
Lock nut
Conduit plate
Plug
Power line (Conduit)
CAUTION
Terminal block
Access panel
Power supply
Control line (Conduit) (Sheath cable)
Fig. 41
Apply sealer (putty, etc.) to the gap between the sheath cable and the hole of the conduit plate to prevent water from entering.
■Examples of Incorrect Wiring
The following are examples of improper wiring that result in system misoperation. You should confirm that you have wired the units correctly before beginning the test run.
Problem 1
●Short circuit will occur after approx. 3 minutes and the power circuit fuse blows.
Problem 2
●Air conditioner will not operate.
(A)Disconnectswitch
1 | 1 |
2 | 2 |
3 | 3 |
G | G |
| Grounding line |
Indoor unit | Outdoor unit |
(B) | Disconnect | (C) | Disconnect | ||
| switch |
|
| switch |
|
1 |
| 1 | 1 |
| 1 |
2 |
| 2 | 2 |
| 2 |
3 |
| 3 | 3 |
| 3 |
G |
| G | G |
| G |
| Grounding line |
| Grounding line | ||
Indoor unit | Outdoor unit | Indoor unit | Outdoor unit | ||
Problem 3
●Compressor will not start; only indoor unit will operate.
(D) | Disconnect | (E) | Disconnect | ||
| switch |
|
| switch |
|
1 |
| 1 | 1 |
| 1 |
2 |
| 2 | 2 |
| 2 |
3 |
| 3 | 3 |
| 3 |
G |
| G | G |
| G |
| Grounding line |
| Grounding line | ||
Indoor unit | Outdoor unit | Indoor unit | Outdoor unit | ||
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