Step 7 - - Convert To Horizontal And Connect Ductwork; Step 8 - Install Outside Air Hood - Carrier 50HT-A07 Installation Instructions Manual

Positioning on Curb —
Position unit on roof curb so that the following clearances
are maintained: 1/4 in. (6.4 mm) clearance between the
roof curb and the base rail inside the front and rear, 0.0 in.
clearance between the roof curb and the base rail inside on
the duct end of the unit. This will result in the distance
between the roof curb and the base rail inside on the
condenser end of the unit being approximately equal to
Fig. 3, section C- - C.
Although unit is weatherproof, guard against water from
higher level runoff and overhangs.
CAUTION
!
UNIT DAMAGE HAZARD
Failure to follow this caution may result in
equipment damage.
All panels must be in place when rigging. Unit is not
designed for handling by fork truck.
After unit is in position, remove rigging skids and
shipping materials.
Step 7 — Convert to Horizontal and Connect
Ductwork (when required)
Unit is shipped in the vertical duct configuration. Unit
without factory- - installed economizer or return air smoke
detector option may be field- - converted to horizontal
ducted configuration. To
configuration, remove screws from side duct opening
covers and remove covers. Using the same screws, install
covers on vertical duct openings with the insulation- - side
down. Seals around duct openings must be tight. See
Fig. 6.
Fig. 6 - - Horizontal Conversion Panels
Field- - supplied flanges should be attached to horizontal
duct openings and all ductwork should be secured to the
convert to horizontal
C06108
flanges. Insulate and weatherproof all external ductwork,
joints, and roof or building openings with counter flashing
and mastic in accordance with applicable codes.
Do not cover or obscure visibility to the unit's informative
data plate when insulating horizontal ductwork.
Step 8 — Install Outside Air Hood
Economizer Hood Removal and Setup - -
Factory Option
1. The hood is shipped in knock- - down form and
located in the return air compartment. It is attached
to the economizer using two plastic tie- - wraps.
2. To gain access to the hood, remove the filter access
panel. (See Fig. 7.)
3. Locate and cut the (2) plastic tie- - wraps, being
careful to not damage any wiring. (See Fig. 9.)
4. Carefully lift the hood assembly through the filter
access opening and assemble per the Unit
Installation Instruction.
FILTER ACCESS PANEL
Fig. 7 - - Typical Access Panel Locations
Two Position Damper Hood Removal and
Setup - - Factory Option
1. The hood is shipped in knock- - down form and
assembled to a metal support tray using plastic
stretch wrap. Located
compartment, the assembly's metal tray is attached
to the basepan and also attached to the damper
using two plastic tie- - wraps.
2. To gain access to the hood, remove the filter access
panel. (See Fig. 7.)
3. Locate the (2) screws holding the metal tray to the
basepan and remove. Locate and cut the (2) plastic
tie- - wraps securing the assembly to the damper. (See
Fig. 10.) Be careful to not damage any wiring or cut
tie- - wraps securing any wiring.
4. Carefully lift the hood assembly (with metal tray)
through the filter access opening and assemble per
steps outlined in the Economizer Hood and Two
Position Hood.
NOTE: Refer to Fig. 8 for EconoMi$er IV wiring instead
of what is shown in unit installation instructions.
9
COMPRESSOR
ACCESS PANEL
OUTDOOR-AIR OPENING AND
INDOOR COIL ACCESS PANEL
C06023
in the return air