Mitsubishi Electric PL18FK2 Service And Parts Manual page 86

NOTE1
:
Install the relay box where you can service easily.
NOTE2: For control circuit wiring, use a wire of No. 1 4 AWG or a control cable according to the power supply of control
circuit.
NOTE3: When the power supply of control circuit is 11 5/230V AC,
Do not connect the control circuit wire to the remote controller cable directly.
D o not place the control circuit wire and the remote controller cable into the same conduit tube.
4-2 Basic wiring
Caution: Before starting all units simultaneously by the remote ON-OFF switch, be sure to connect a sequence-start timer
into the remote ON-OFF circuit. Otherwise, rush of starting current exert a bad influence upon the power supply.
Remote
ON/OFF No.1 unit No.2 unit
qwitrh
relay box relay box
-
. . . . -.
.
Glow switch or pilot lamp
combined to easily ident
Next unit
To
No. I
unit
1
1
1
Remote controller
Timer adapter cables
4-3 Switch function of remote ON-OFF switch
SW2
remote ON-OFF and individual control)
*
1After all units start together, if SW2 is turned to OFF, each unit can be individually stopped by each remote controller.
*
2After all units stop together, if SW2 is turned to ON, each unit can be individually started by each remote controller.
(Remote ON-OFF control)
5.1NDIVIDUAL CONTROL BY GATHERING REMOTE CONTROLLERS.
Gathering remote controllers allows controlling individually units installed
at different places and to monitor the operations without a special
control board.
R e m o t e control cable is extendable up to 550 yards. When the cable
length exceeds 39 ft, use the double-insulated two-core cable such
as Belden 9407, and the cable thickness must be No.22 AWG or
above.
When gathering the power ON/OFF switches of air conditioners near
the remote controllers, you should also install the power ON/OFF
switch near each unit t o prevent electric trouble in servicing.
OFF
(Individual control)
Each unit can be controlled by
each remote controller.
Remote
ON-OFF s w i t c h is
not
available.
remote
controller cable (2-core)
I(
A
S W l
(Switches between
remote ON and OFF,)
-
ON
(Start)
OFF
(Stop)
Remote controller
All units start together.
*
1
Individual control is not available.
All units stop together. * 2
Individual control is not available.
I
U K