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Electrical
Knockouts
Figure 3B
KNOCKOUTS:
Supply and Return
Knockout
Knockout
Tab
Knockout
Slot
Knockout
Tab
Figure 4
Supply and Return
Insulation Cutline
Figure 5
Supply, Return, and Drain Riser Installation
1.
Three sides of each Universal Modular unit have four
Supply and Return riser knockouts along the center
and one Drain knockout near the lower part of the unit
(see Figure 3A). Identify whether your application uses a
2-pipe or 4-pipe configuration.
Modular Hi-Rise Series Fan Coils
INSTALLATION, OPERATION, & MAINTENANCE MANUAL
a. 2-pipe configurations: typically use the two inner
riser knockouts.
b. 4-pipe configurations: will use all four riser
knockouts.
Top Supply
Air Knockout
2.
Locate and mark the riser and drain knockouts that
apply to your particular unit application, insuring proper
orientation of the Return Air opening in room.
3.
Insert a flat head screw driver into knockout slot shown in
Figure 4.
4.
Pry screw driver back and forth until knockout tabs break
away from the unit.
Drain
5.
Discard knockout. Be careful of sharp edges.
Knockout
6.
Use a sharp retractable knife (see Figure 5) and vertically
cut the insulation down the center of the riser and drain
knockouts the full length of the knockout.
7.
Use adhesive or glue to re-attach insulation that has
pulled away from the unit during knockout removal
process.
CAUTION: Toxic residues and loose particles
resulting from manufacturing and field piping
techniques such as joint compounds, soldering
flux, and metal shavings may be present in the
unit and the piping system. Special consideration must be
Drain
given to system cleanliness when connecting to solar,
Insulation
domestic or potable water systems.
Cut Line
Submittals and product literature detailing unit operation,
controls, and connections should be thoroughly reviewed
BEFORE beginning the connection and testing of risers and
piping.
To assure optimal unit performance, the supply connection(s)
are marked on the unit's coil with an "S" meaning supply or
inlet and "R" meaning return or outlet indicating flow direction
to and from the coil. Blue letters mark the chilled water
connections and red letters mark the hot water connections.
The unit's internal piping is designed to accommodate a total
riser vertical movement of ±1-1/2", due to thermal expansion
and/or contraction, when positioned properly at the job site.
Risers must be anchored to the building structure to limit
expansion and contraction movement to a maximum of 3".
Riser anchoring and expansion
7
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