Installation, Operation and Maintenance Manual
VertiCool Classic
9
Subject to change without notice.
20.10-IM (0617)
General Ductwork Recommendations
1.
Please make sure that all duct work, evaporator return
and supply air and for air-cooled units the condensing
section inlet and discharge air, is connected to the units
using field supplied flexible duct connectors.
2.
Make sure that all duct work is supported
independently from the equipment�
These two installation requirements are meant to minimize
or isolate any unit vibration to help assure that it is not
transmitted into the duct work, to the structure and/or out
into the space�
All ductwork must be designed in accordance with industry
accepted practices� Consult ASHRAE, AMCA or SMACNA
guidelines or standards for details� 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�
Ducts should be insulated in accordance with applicable
industry standards or per local codes, particularly if the unit
will be operated during cold weather� The condensing unit
intake duct should include a provision to access the inlet
side of the coil for periodic cleaning� It is also best to design
for sufficient clearances for servicing the blower motors,
expansion valves, filters, and any additional accessories
installed�
Plenum Installation
The plenum is typically installed at the factory� However, it
may need to be removed to move the unit into position� The
plenum is held in position with drive screws�
If the plenum has discharge grilles, the grilles will have to
be removed to take the plenum off for re-installation on the
evaporator section�
Condensate Drain Connection
Install a field fabricated condensate trap and drain line or
a condensate pump as required� Route the condensate
disposal tubing to a suitable location�
Units are equipped with two 3/4” IPS evaporator drain
connections� It is only necessary that one drain connection
be utilized� Make sure that the drain connection not being
used is plugged�
The drain line
must
be trapped because the coils are
located on the negative side of the blower(s)� The purpose
of the condensate trap is to neutralize the negative pressure
created within the cabinet by the blower�
This negative pressure can vary from less than 1” up to 2”
column. The condensate trap must be of sufficient depth in
water column to permit the condensate to flow from the drain
pan�
The “A” dimension (Figure 6) must equal or exceed the
negative static pressure developed by the supply air blower�
If it does not, the condensate will not drain properly and
may overflow the drain pan. The trap must be at least 2-1/2”
deep to maintain a water seal under all operating conditions,
especially during blower start-up�
It is highly recommended that the trap be primed with water
prior to unit start-up�
Each trap must be piped to a suitable waste drain�
Figure 6
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�
If the unit has been shipped split or has been split to
accomplish installation, the resealable refrigerant fittings
must be connected as follows:
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 7)�
2.
Align each resealable fitting and hand thread the
female fitting onto the male fitting (Ref. to Figure 7).
Continue to hand thread until resistance is observed�
Continued on next page
Unit
“A”
2-1/2"
Summary of Contents for VertiCool CLASSIC
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