Carrier 06E - Manual (Page 6)

PRESSURE DIFFERENTIAL
ADJUSTMENT SCREW
SEALING BYPASS CYLINDER
CAP PISTON HEAD
CONTROL SET
POINT ADJ NUT
POPPET VALVE'
BLEED ORIFICE'
DISCHARGE MANIFOLD
SUCTION PRESSURE
nZH DISCHARGE PRESSURE
DISCHARGE SUCTION
VALVE PISTON VALVE
UNLOADED OPERATION
BYPASS PASSAGE
COMMUNICATES WITH
SUCTION MANIFOLD
-SUCTION MANIFOLD
l~~~1 DISCHARGE PRESSURE LOADED OPERATION
Fig. 6 — Capacity Control Valve Operation
TO REGULATE CONTROL SET POINT (Refer to
Fig. 7) —Turn adjustment nut clockwise to its
bottom stop. In this position, set point is 85 psig.
Control set point is then regulated to desired
pressure by turning adjustment nut counterclock­
wise. Each full turn decreases set point by 7.5 psig.
Approximately 11 1/2 turns counterclockwise will
decrease control set point to 0 psig. Table 3 shows
the steps of control.
PRESSURE DIFFERENTIAL ADJUSTMENT
(Fig. 7) — Turn differential adjusting screw counter­
clockwise to its back-stop position. In this posi­
tion, differential is 6 psi. Pressure differential is set
by turning adjustment screw clockwise. Each full
turn increases differential by 1.5 psi. Approxi­
mately 10 turns clockwise will increase pressure
differential to 22 psi.
CONTROL
TO PREVENT REFRIGERANT LEAKAGE)
Fig. 7 — Capacity Control Valve