Unit installation

Installation - Mechanical
SCXF-SVX01K-EN 31
Airside Economizer Installation
Note: Airside economizer option available on 20-80 tons
only.
Economizer Handling
1. Hoist the damper cabinet to the installation location
with straps positioned under the skid as shown in
Figure 23, p. 31. Use spreader bars to prevent unit
damage during lifting.
2. With the damper cabinet at its final location (near the
unit), remove the screws securing it to the skid from the
side flanges. Retain these screws for later use.
Economizer Preparation
3. Open the access door and remove the damper
cabinet’s support legs and its hanging bracket.The
support legs are secured to the skid, and the hanging
bracket is secured with wire ties to an inside flange
near the cabinet’s base. Remove the C-channel collar
and install it on the unit, if not already installed.
4. Remove the roll of 1/8” thick gasket from the damper
cabinet’
s W-supports, and apply it to the C-channel
collar mounted on the rear of the unit.This gasket will
provide a seal between the damper cabinet and the
unit.
5. Attach the legs (with screws provided) to the leg
brac
kets located on the damper’s base.
6. Attach a field-provided clevis of suitable strength ( > 1/
2”),
to each of the corner lifting brackets through the 7/
8” diameter holes.
7. Attach to the clevises a means of lifting the damper
cabinet
from its skid.
Economizer Installation
8. Slowly raise the damper cabinet from its skid.
9. Attach the hanging bracket across the front of the
damper
cabinet. Position it with its short flange
pointing to four o’clock, and secure it with screws
provided. See Figure 23, p. 31.
10. Lift the damper cabinet and position it such that the
hanging
bracket is positioned over the unit’s C-channel
collar.
11. Lower the damper cabinet until the holes in its side
flanges
are aligned with the holes in the C-channel
collar. Install screws removed in step 3 through the
damper cabinet’s side flanges and into the C-channel’s
corresponding holes.
12. Attach ductwork to the top and back dampers
according
to local codes.
Field Wiring Connections
13. Open the damper cabinet’s door and connect the
factory-provided plug from the actuator to the
factory-provided plug in the unit’s filter section.
14. Cabinets
with TRAQ dampers only: Unroll two
rolls of pneumatic tubing located inside damper
cabinet. Route tubes through cabinet’s front upper
panel (0.25 dia. holes provided). Connect to two
pneumatic tubes protruding from customer electrical
connection panel on unit. Be sure to connect black to
black, white stripe to white stripe).
15. Cabinets
with TRAQ dampers only: Locate the
“bullet” sensor and rolled up wiring in the unit’s filter
section. Route it into the damper cabinet and insert the
sensor into the sensor mounting clip attached to
underside of one of theTraq dampers.
WARNING
Proper Field Wiring and Grounding
Required!
All field wiring MUST be performed by qualified
personnel. Improperly installed and grounded field
wiring poses FIRE and ELECTROCUTION hazards.To
avoid these hazards, you MUST follow requirements for
field wiring installation and grounding as described in
NEC and your local/state electrical codes. Failure to
follow code could result in death or serious injury.
Figure 23. Proper lifting of the airside economizer (top)
and airside economizer option (bottom)
Spreader
Bar
Lifting
Strap
Cable with
spreader bar
Hanging Bracket
C-Channel