Regulations on wire size differ from locality to locality. For field wiring requirements, please refer to your local electri- cal codes. Make sure that the installation fully complies with all local and national regulations.
(1)Remove access panel “C”. (Fig. 32)
(2)Connect the
(3)Be sure to size each wire allowing approx. 4"
(10 cm) longer than the required length for wiring. Store excess wiring inside the cabinet.
(4)When connections are completed, check that all con- nections are correct as shown in the wiring system diagram on panel side.
(5)Be sure to ground the unit according to your local codes.
6. Test Run
Performing a test run
Refer to the test run procedures in the indoor unit installation manual.
Perform the test run separately for each connected indoor unit. If 2 units are operated simultaneously, it is not possible to correctly check for errors in tubing and wiring.
If the room temperature is 59°F (15°C) or below, it may not be possible to check for tubing errors with cooling operation. If this occurs, perform heating operation for each unit individually, and check that warm air is discharged from each unit. If there is cold air mixed in with the warm air, check the tubing connections again.
Checking tubing and wiring
Perform the test run and check that operation is normal. If there is an error in tubing or wiring, the refrigerant may flow to indoor unit B when indoor unit A is operated (for example).
CAUTION
Stop operation immediately if there is an error in tubing or wiring. Turn the power (breaker) to OFF, and check whether the
If there is an error in tubing,
Lock nut | Cabinet |
|
Terminal
block 
Conduit plate
Plug | Access panel “C” |
Inter unit | Power supply |
(Conduit) | (Conduit) |
Fig. 32
Access panel 
C
Conduit plate
CAUTION
Make sure there is no gap between access panel “C” and the conduit plate.
Fig. 33
26
