Operational Data; Receiver; Crankcase Pressure Regulator 10 - Hussmann HGL-1BS Installation And Service Instructions Manual

Repeat steps 2 and 3 two more times, the
third time evacuating the system to 500 mi-
crons.
CASE MODELS
Ambient Temperature
Head Pressure (psi)
Suction Pressure (psi)
Refrigerant
RECEIVER –
The receiver should not be confused for
a filter-drier or muffler. The receiver is in the
liquid line after the condenser and just ahead of
the filter-drier. The manufacturer may label
the receiver as a muffler or a drier but it is in
fact an empty shell.
CRANKCASE PRESSURE
REGULATOR –
The HGL-1 and 2 cases employ a crank-
case pressure regulator in the suction line. The
CPR is set for 10 psi. The purpose of the valve
is to maintain a low suction pressure on start-
up so that the compressor will start properly.
On start-up, the valve will hold the suction
pressure at the desired setting until the suction
pressure has dropped below the setting, then
the valve will open. If it becomes necessary to
check or reset the setting, the case must be
warm such as after a defrost cycle or from an
initial warm case condition.
Operational Data –
models based on lab tests, and may vary under
field operating conditions. All data is based on
a discharge air temperature of -25°F and a re-
turn air temperature of -10°F. See chart below
HGL-1/2 BS-TS
75°F 80°F
230-240 235-245
5-6 5-7
R-404A --------------------------------------------------
Put a suction compound gauge on the compres-
sor suction valve, start the compressor. If the
pressure needs to be reduced turn the adjust-
ment screw clockwise or counterclockwise to
raise the pressure
DO NOT SET THE VALVE BASED ON THE
NAMEPLATE AMPERAGE RATING AS
THE PRESSURE SETTING WILL BE TOO
HIGH AND THE COMPRESSOR WILL
NOT START PROPERLY
Page 11
The following is typical data for HGL
HGL-3-BS/TS
75°F 80°F
230-240 235-250
6 – 8 6 – 8