1. If the unit has been ordered with a supply air plenum,
then each side of the unit has one supply air knockout as
well as a supply air knockout on the top of the unit (see
Figures 21 and 22).
2. Determine which supply air opening/openings are
required for your application.
NOTE:
The supply air opening on the riser side of the unit
should not be used.
3. Use a sharp retractable knife to trim insulation using
center knockout slot/trim line as pattern (see Figure 23).
4. Use a sharp standard needle nose pliers and grab
knockout tab (see Figure 23).
5. Twist or pry pliers back and forth until knockout tab
breaks away from unit.
6. Repeat for all supply air tabs until all have been broken.
7. Discard center knockout piece. Be careful of sharp edges.
8. Use a sharp retractable knife to trim any excess
insulation using knockout hole as pattern.
Unit
Wall
Unit
Insulation
90º
Duct Flange
Figure 24
9. Use duct pliers (hand seamers) to fold duct flange out of
the unit 90˚ for each side of the supply air opening along
duct break (see Figure 23). The 90˚ flanges can now be
used as drywall stops to prevent coverage of discharge
opening (see Figure 24).
10. Use adhesive or glue to re-attach insulation that has
pulled away from the unit during knockout removal
process.
11. For ducted applications tape should be applied along
and around all of the supply air opening knockouts to
prevent air leakage.
SECTION III – Finishing Installation (All
Models)
Grille/Ductwork Installation
All ductwork and/or supply and return grilles should
be installed in accordance with the project plans and
specifications. If not included on the unit or furnished from
the factory, supply and return grilles should be provided as
recommended in the product catalog.
Outside Air Installation (if required)
Units provided with outside air for ventilation should have
some form of low-temperature protection to prevent coil
freeze-up. This protection may be any of several methods
such as a low-temperature thermostat to close the outside air
damper or a preheat coil to temper the outside air before it
reaches the unit.
It should be noted that none of these methods will
adequately protect a coil in the event of power failure.
The safest method of freeze protection is to use glycol in
the proper percent solution for the coldest expected air
temperature.
The manufacturer assumes no responsibility for
undesirable system operation due to improper system
design, equipment or component selection, and/or
installation of ductwork, grilles, and other related
components.
Electrical Connections
The unit serial plate lists the unit electrical characteristics
such as the required supply voltage, fan and heater
amperage and required circuit ampacities. The unit wiring
diagram shows all unit and field wiring. Since each project
is different and each unit on a project may be different, the
installer must be familiar with the wiring diagram and serial
plate on the unit
BEFORE
beginning any wiring.
The unit electrical supply is designed to enter through
knockouts provided in the top of the unit and pass down
through matching knockouts in the control section top.
17
Modular Hi-Rise Series Fan Coils
INSTALLATION, OPERATION, & MAINTENANCE MANUAL
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