Wiring The System; Charging The System - Breezaire WKS4000 Series Installation Instructions Manual

F Wiring the system: Wire the system in accordance with local code and the wiring diagrams. Electrical
connections are made to the terminal strip in the fan/coil and the condensing unit. (Figure 3) Both the fan/coil
and condensing unit requires a standard 110-volt, 60 Hz properly grounded electrical source. Each circuit
must be rated for minimum amperes in accordance with sizing guide.
THERMOSTAT
WARNING: THE COMPLETED SYSTEM MUST BE PRESSURED TESTED FOR A
MINIMUM OF 6 HOURS AND THEN EVACUATED TO HOLD A 250 MICRON VACUUM,
AFTER THE PUMP IS TURNED OFF, FOR A MINIMUM OF 15 MINUTES. (NOTE: THIS
COULD TAKE 6 HRS TO ACHIEVE) ANY LEAKS DISCOVERED AFTER REFRIGERANT
CHARGING IS THE SOLE RESPONSIBILITY OF THE INSTALLER.
F Charging the system: After all components have been connected, reinstall the access valve cores and
open the valves. With electrical power connected to the fan/coil unit energizing the solenoid valve, pressure
test the complete system for a minimum of six hours. If no leaks are found, leave the fan/coil and solenoid
valve energized, evacuate the system through both the liquid and suction service ports for a minimum of six
hours. Replace the insulation and cover on the fan/coil unit.
With electrical power connected to both the condensing unit and the fan/coil, slowly feed refrigerant (R12 or
R414B) into the suction service port. As the suction pressure rises to 30 psi the condensing unit will start.
Continue feeding refrigerant while maintaining a pressure above 15 psi to prevent the compressor from short
cycling. When the system is correctly charged the suction pressure should correspond to an evaporating
temperature 35°F when the enclosure temperature is at 55°F. Feed refrigerant until the sight glass is clear of
bubbles if using R12. If R414B is being used there may be some bubbles in the sight glass.
Allow the system to operate for several hours and than check the refrigerant level in the sight
glass again. Additional refrigerant may be required as the temperature of the enclosure is
lowered to approximately 55° or the ambient temperature at the condensing unit rises above the
temperature at which the unit was charged.
FAN MOTOR
SOLENOID VALVE
GROUND (GREEN)
LINE (BLACK)
COMMON (WHITE)
FAN/COIL WIRING
(FIGURE 3)
WKS 4000 12 /05 PG. 5
LOW PRESSURE CONTROL
FAN MOTOR
4 2 1
COMPRESSOR
LINE (BLACK)
COMMON (WHITE)
GROUND (GREEN)
CONDENSER WIRING