Carrier Acqua Junior 30AJ Series Installation, Operation And Maintenance Manual page 61

6.5 Suggested electric connection
Transformer
Select freezing
temperature
Open: 2°C
Closed: -7°C
Turn on/turn off
remote
Open: Turn off
Closed: Turn on
Control select
Open: Local
Closed: Remote
Sensor
temperature
water return
Sensor
temperature
water exit
7. Operation
7.1 First check
Before starting-up the unit, check the prior conditions and
the following items:
a) Check the installation and operation of all the auxiliary
equipments, such as condensers and evaporators.
b) See if all the electrical connections are set.
c) Check if there is no refrigerant or water leaks.
d) Check if the power supply is proper for the electrical
characteristics of the unit (U= 10% nominal value).
CONTROL UNIT
UC4230
Compressor
Valve solenoid
Pressure
switch
high low
contact
e) Be sure the compressor can freely move in all directions
on the buffers (loosen the fastening screws of the
compressors).
f) Check if the direction of the fans is correct.
g) Check if the operating direction of the compressor
is correct.
On
Button on
Compressor
Anti recycle
Freezing
Pressure Habilitation
switch
CONTROL FRONT
Button off
61