16
water piping and valves are located over the drain pan
and need not be insulated.
11. If required, fireproof where necessary. Any fireproofing
requirements where risers or piping penetrate floors or
walls are the responsibility of the installer. This work
should be done only after all pressure testing is com-
pleted. The fireproofing method used must accommodate
pipe expansion and contraction and the piping must be
protected from abrasion and chemical attack. The pipe
insulation also must be maintained to prevent sweating
and must be protected from wear or erosion at the joint
between the insulation and the fireproofing material.
42SU UNIVERSAL ARRANGEMENT
The unique design of the universal stack fan coil unit allows
for field configuration for each unit. Air discharge, riser,
drain, and outside air knockouts have been strategically locat-
ed on each unit. Risers, shown with unit, are for reference on-
ly. All risers are factory fabricated and shipped loose for field
installation.
It is important that you identify all of the unit feature loca-
tions and which knockouts you intend to use before proceed-
ing with the installation. See Fig. 15-19. Also, it must be de-
termined whether your application requires a Mating Unit
(primary/secondary) and its configuration. Consult your local
sales representative or the factory for further details on pri-
mary/secondary arrangements.
Potential Universal Arrangement Unit Configurations
Risers: Three Locations
The pre-installed supply, return, and drain risers (2-pipe or 4-
pipe applications) can be oriented on any of three sides of the
unit (see Fig. 15).
Risers cannot be installed on the return air side of the cabinet.
Fig. 15 — 42SU Unit Configuration
Unit orientation is determined based on the location of the
risers in the building. The riser side of the universal stack unit
always determines the rear of the unit. See Fig. 16.
Fig. 16 — 42SU Unit Orientation
Return Air: Single Location
The return air/access panel may then be oriented on the left,
right, or front of the unit.
Supply Air: Five Locations (4 sides and top)
Includes stitched design for
1
/
2
-in. duct flanges.
Outside Air: Two Locations
Either side adjacent to the return air opening.
NOTE: Outside air opening may be used on a side if risers are
configured on that same side.
Supply, Return, and Drain Riser Installation
1. Three sides of each universal stack unit have four supply
and return riser knockouts along the center and one drain
knockout near the lower part of the unit (see Fig. 17).
Identify whether your application uses a 2-pipe or 4-pipe
configuration.
a. Two-pipe configurations typically use the two inner
riser knockouts.
b. Four-pipe configurations will use all four riser
knockouts.
2. Locate and mark the riser and drain knockouts that apply
to your particular unit application, ensuring proper orien-
tation of the return air opening in room.
3. Insert a flat head screw driver into knockout slot shown
in Fig. 18.
4. Pry screw driver back and forth until knockout tabs break
away from the unit.
5. Discard knockout. Be careful of sharp edges.
6. Use a sharp retractable knife (see Fig. 19) 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.
42SU
CABINET
RETURN AIR
HR CRDHS
CS
HR CRDHS CS
HR CRDHS CS
D
CR
HS
CS
HR
R
D
S
HR = HOT WATER RETURN
HS = HOT WATER SUPPLY
D = DRAIN
CR = COLD WATER RETURN
CS = COLD WATER SUPPLY
R = RETURN
D = DRAIN
S = SUPPLY
2- or 4-PIPE
REAR
RISER SIDE
42SU
CABINET
RIGHT
FRONT
LEFT
To Next Page
Loading...
