WINTER CONDENSING PRESSURE
CONTROLS
The customer may specify lower pressure settings
than those recommended; however, refrigeration
performance may be affected. Minimum receiver
pressure is 140 psig.
Refrigerant
A8 A9
(Flooding
(Receiver
Valve)
Pressure)
R22
175
165
R-404a/507
205
195
MECHANICAL LOW PRESSURE
CONTROLS
The Alco low pressure control comes with a fac-
tory set cut-in pressure of 15 psig. Since the dif-
ferential is fixed at 10 psig, the cut-out is 5 psig,
which is the lowest possible cut-out for this con-
trol. The adjustment screw is located next to the
pressure connection. Turn the screw clockwise to
increase cut-in pressure.
Note:
3
1
¼
2
rotations of the screw represents the
entire 70 psi adjustment range, or 1 turn = 20 psi.
CONTROL SETTINGS
September 1, 1997
7 - 2
HUSSM ANN CORPORATION • BRIDGETON, M O 63044-2483 • Printed in USA
Return to Contents
