Specifications

9
Electrical Connection
Wiring regulations about wire diameter differs from country to country. Please refer to your LOCAL ELECTRICAL
CODES for field wiring rules. Be sure that installation comply with such rules and regulations.
General Precaution
Ensure that the rated voltage of the unit correspond to the name plate before carrying out proper wiring according
to the wiring diagram.
Provide a power outlet to be used exclusively for each unit. A power supply disconnect and a circuit breaker for
overcurrent protection should be provided in the exclusive line.
The unit must be GROUNDED to prevent possible hazard due to insulation failures
Every wiring must be firmly connected.
Every wiring should not touch the refrigerant piping, compressor and any moving parts of fan motor.
Operational Check
After all wiring is completed and the system is charged with refrigerant, make sure the unit is operating properly.
Check that :
Condenser fans are running with warm air blowing off the condensing unit.
Evaporator blowers are running and discharging cool air from ducts.
Suction line and liquid line pressures are in the region of 75 psig and 275 psig respectively.
Sequential Controller Lcd Operating Instructions
(Standard for cooling and heatpump units)
1. Sequential controller LCD display
A : Time display
B : Error indication
C : Compressor running display (up to 4
compressors)
D : Key lock display
E : Heater display (up to 2 heaters)
F : Energy saving mode display
G : Compressor defrost cycle display (up to
4 compressors)
H : Operation mode display
I : Temperature set display
2. Operating Guide
2.1 ON/OFF key
Press once to start the air conditioning unit.
Press again to stop the unit.
The operation lamp next to the key lights up and goes off respectively when the unit is running
or not running.
Caution : In the case when the ON/OFF key is pressed immediately after the operation is
stopped, the unit will not restart until 3 minutes later to protect the compressor.
Controllers