Bryant 569J Series Installation, Start-Up And Service Instructions Manual page 38

WATCH
YOUR
SUCTION
RISERS
LIQ INJ BULB
TO SUCTION LINE
SOLENOID
VALVE
Fig. 33 - - Location of Hot Gas Bypass in 569J*12F
SUCTION LINE
HOT GAS
DE-SUPERHEAT
CHAMBER
HOT GAS BULB
TO SUCTION LINE
AND INSULATE
SCHRADER VALVE
AT BOTTOM
Fig. 32 - - Hot Gas Bypass Option (569J*12F units only)
Hot Gas Bypass
Factory Installed
Option
C12440
EVAPORATOR
COIL
HOT GAS LINE
COMPRESSOR
569J*12F with SVR Relays
With no thermostat demand, there will be no voltage at
LVTB- - A1; HGBP SOLENOID is de- - energized and solenoid
valve remains closed, preventing bypass vapor from the
desuperheating tank to enter the suction line at the
compressor.
On a thermostat call for first- - stage cooling, LVTB terminal
Y1 is powered; when CADM1 is satisfied, compressor
contactor C1 and Solenoid Valve Relay SVR1 are energized.
SVR1 contacts close, providing 24- - v to LVTB terminal A1,
then through HGBP RELAY NC contacts to HGBP
SOLENOID. HGBP solenoid valve opens, allowing bypass
vapor from the desuperheating tank to enter the compressor
suction port.
If thermostat calls for second stage cooling, LVTB terminal
Y2 is powered; when CADM2 is satisfied, compressor
contactor C2, Solenoid Valve Relay SVR2 and HGBP
RELAY are energized. HGBP RELAY NC contacts open,
de- - energizing the HGBP SOLENOID; solenoid valve closes,
blocking bypass vapor from the desuperheating tank and unit
runs at full cooling capacity.
The model 569J*12F also includes the 32LT Motormaster
low ambient control as a standard feature. Refer to
Appendix C for information on the Motormaster control.
38
CONDENSER
COIL
C12072