Installation, Operation and Maintenance Manual
VariCool EZ-Fit
16
Subject to change without notice.
40.20-IM (0118)
Refrigerant Connections
All units are shipped from the factory with a full factory
refrigerant charge. The resealable refrigerant fittings must
be connected and properly tightened to facilitate refrigerant
flow between the evaporator and compressor / condenser
section�
For shipping purposes the refrigerant fittings are held in place
to the cabinet using vinyl coated hangers and a mounting
bracket� These are to be removed before the refrigerant
fittings are connected.
1.
On the refrigerant resealable fittings, if not already
accomplished, apply a few drops (5 to 6 droplets are
recommended) of refrigerant oil to the male coupling
halves before starting the assembly (Ref� to Figure 6)�
2.
Align each resealable fitting and hand thread the
female fitting onto the male fitting (Ref. to Figure 6).
Continue to hand thread until resistance is observed�
3.
Once slight resistance is evident, continue to tighten
the fittings using the appropriate size wrenches listed in
Table 1� Please note that it is important to support the
male side of the fitting with a wrench when tightening
the female side with a wrench�
Figure 6 - Resealable Fittings
4.
If the resealable fittings still feel loose, tighten a bit
more as required�
INFORMATION
Count the number of threaded rotations�
Use Table 1 to determine how many total
rotations are required for proper sealing of
the fittings.
Size
Wrench
Full Turns Required
3/8"
1-3/16"
6
1/2"
1-3/16"
6
5/8"
1-5/8"
7-3/4
3/4"
1-5/8"
7-3/4
7/8"
1-5/8"
8
1-1/8"
2"
8
Table 1 - Resealable Fitting Turns
INFORMATION
If low refrigerant pressure is evident during
the start-up process, check the tightness
of all resealable fittings. A fitting that is not
fully open will restrict refrigerant flow.
Supply Air Blower Section
Before installing the blower section(s) make sure the
appropriate gasket material has been applied to the top of
the evaporator section and the compressor / condenser
section (Ref. Figure 4, surfaces identified as “2”).
Care must be taken to make sure the alphabetical labels
align properly for either a single module or a dual module
application�
After being positioned appropriately, attach the tie plates as
done previously for the other sections�
Duct Connections
Ductwork must be designed using applicable industry
standards and practices� Use of turning vanes is
recommended� Verify that the designed duct external static
pressure is in line with the capability of the unit blower /
motor provided�
Connection to the unit supply air outlet flange must be made
using a field provided flexible collar.
Units that incorporate the direct drive parallel fans (DDP)
should have the two supply outlets serve a common duct
arrangement�
When dual modules are used in the application, a common
duct should be used for both modules�
Ductwork and plenums shall be insulated in accordance with
applicable industry standards or local codes�
Apply oil to male threads
Female Fitting
Male Fitting
Clockwise Rotation
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