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VALVE SETTINGS
LAC-4
The LAC-4 is available with 4 standard set-
tings for various refrigerants as shown in
Table 2. Some manufacturers' systems use
other settings which are critical to system
operation e.g. harvest cycle on ice makers.
These non-standard settings are available
for replacement but delivery time may be
extended. See Figure 1.
LAC-4-DS
The LAC-4-DS provides the choice of two
settings, 100 psig or 180 psig (other com-
binations of high and low settings have
been produced). The higher setting is ob-
tained by a combination spring force and
air charge in the upper dome assembly.
See Figure 2. The valve supplied with the
higher of the two settings is stamped on
the hex flats of the condenser connection.
When the valve is used on systems with:
Refrigerant 407A, 407F, 448A, 449A,
and 502
1. Remove low setting stamp from hex flat
with a file.
2. Install valve. It is set to maintain 180
psig during low ambient conditions.
Refrigerant 134a and 513A
1. Clip 3/4" off dome capillary tube to
relieve air charge.
2. Remove paint from end of
capillary tube.
3. Fuse tip to prevent moisture from
entering dome.
4. Remove high setting stamp from hex
flat with a file.
5. Install valve. It is now set to maintain
100 psig during low ambient
conditions.
LAC - 4
Figure 1
RECEIVER
LAC - 4 - DS
Figure 2
RECEIVER
DISCHARGE
CONDENSER
DISCHARGE
CONDENSER
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