Electrical Connections - Carrier 40GKX012 703-40 Series Installation Manual

40 GKX

Electrical connections

CLR
CA
C
CV
CG
A
B
CONTROL PANEL
mod. 12 - 18 - 24
Condenser
Ground connection screws
Internec board
Auxiliary board
Outdoor unit connection
terminal board
Control panel can be reached by opening the grille and removing its
metal cover by 4 screws.
IMPORTANT for units equipped with electric heater:
The unit is equipped with two thermostats: one with automatic reset
and one with manual (electric) reset that can be reactivated by
switching the power supply off and then on.
SYSTEM CONFIGURATION
IMPORTANT:
Prior to making the electrical connections, set the switch A
shown in the drawing as follows:
position 1 for cooling only unit;
position 2 for heat pump unit.
GB - 10
CP
R
C
W2
O
Y
S2
S1
Key panel
Relay board (only on models
with electric heater)
Transformer
Holes for fixing panel in
position
A
Key panel
C
A
B
CONTROL PANEL
mod. 28 - 36 - 48 - 60
Fan connector
C
V
LED/RECEIVER connector
C
LR
Float connector
C
G
Pump connector
C
P
Louvre connector
C
A
If errors are made during the operation previously described, switch
off the main power supply, reposition switch A in the correct position
and then switch the power on.
Connect the power cables to terminal box connectors in accordance
with the wiring diagram and tighten firmly.
IMPORTANT:
• Main power supply comes from outdoor unit.
• Make ground connection prior to any other electrical
connections.
• If the indoor unit is fitted with an electric heater, this must have a
separate power supply.
Ensure that the mains supply connection is made through a switch
that disconnects all poles, with a contact gap of a least 3 mm.
• Make the electrical connections between units prior to proceeding
to the main supply unit connection.
Ensure that the mains supply connection is made through a
switch that disconnects all poles, with a contact gap of a
least 3 mm.
• Fix the power cable of the electrical resistances under the single
cable clamp. (fig. "E").
Make certain that the YELLOW/GREEN cable is stripped back
further than the others.
IMPORTANT (for heat pump units):
• Check the terminal block in the outdoor unit control panel
to define the electrical connections:
The indoor unit control panel is supplied with a resistor ´
factory-connected between terminals "S1" and "S2".
If the outdoor unit terminal block is supplied without terminals
"S1" and "S2" , make the electrical connections as per Fig. A,
leaving resistor ´ connected.
If outdoor unit terminal block is provided with terminals "S1"
and "S2", remove resistor ´ and make electrical connections
as per Fig. B.
CV
CP CP
A. Electric heater supply
connection
B. Outdoor unit connection
C. Polarised connectors
CLR
CA