Installation, Operation and Maintenance Manual
VertiCool Classic
16
Subject to change without notice.
20.10-IM (0617)
1.
Temporarily hand thread the female halves of the self-
sealing couplings (supplied with the interconnect kit)
onto the male couplings, approximately 1 to 1-1/2 turns�
This is to make sure that the interconnecting tubing will
be routed and brazed with the self-sealing couplings
in their final proper location, so that there will be no
difficulty when the final coupling assembly is made.
2.
If there is a hot gas bypass option, connect that
coupling the same way�
3.
Run the interconnecting tubing required� Always follow
accepted industry practices for sizing refrigerant
lines based on line length and elevation differences�
Disconnect the self-sealing couplings that were
temporarily installed in step 1 above�
4.
The suction line should be pitched downward to the
compressor, sloping approximately 1/4” every ten feet
to facilitate oil return�
5.
“P” traps (field supplied) are required for all suction
line risers every 15 feet� When the evaporator is above
the condensing section, an inverted “P” trap should be
incorporated as close as possible to the evaporator
(this minimizes flood back / oil slugging during the off
cycle)� If the condensing section is more than 40 feet
above the evaporator, consult the factory for specific
refrigerant components�
INFORMATION
On units with more than one circuit, be
careful not to intermix liquid, suction, and/
or hot gas lines of the various circuits�
INFORMATION
When brazing tubing to the self-sealing
couplings, use a water soaked wet rag,
running water bath or chill blocks on the
quick-connects to prevent overheating the
valves and damaging the seals� Always
apply heat toward the field installed
refrigerant line� Do not apply heat toward
the coupling valve and seal�
6.
Install the Schrader valve fittings into the tubing before
brazing the couplings onto the ends of the tubing� Use
a 1/4" hole to mount the valve� Clean and debur the
tubing before doing any brazing to ensure that no chips
or debris are left in the refrigerant circuit� Remove the
Schrader valve cap and core before doing any brazing�
7.
Leak check line sets with nitrogen at 500 psig� After
brazing the tubing to the self-sealing coupling halves,
evacuate each line to 300 microns� Check to make
sure that each line holds a vacuum after removal of the
vacuum pump (indicating no leaks) (micron level should
not go above 500 microns within 10 minutes)� Wipe
off coupling seals and threaded surfaces with a clean
cloth to prevent the inclusion of dirt or foreign material
into the system� Lubricate rubber seal and metal seal in
the male halves with refrigeration oil� Thread coupling
halves together by hand to insure proper mating of
threads� Continue to hand-thread each half-coupling
to its mating half until resistance is felt (approximately
1-1/2 to 1-3/4 turns)� Complete the connection of the
mating half-couplings with a wrench� 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.
The drawing below illustrates a typical piping arrangement
for factory ordered split systems
A - Male self-sealing fittings on unit sections
B - Refrigerant piping between sections (field-supplied)
C - Female self-sealing fittings in interconnect kit (4)
D - Schrader fittings in interconnect kit (4)
Summary of Contents for VertiCool CLASSIC
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