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Step 8 — Install Outside Air Hood
ECONOMIZER AND TWO POSITION DAMPER
HOOD PACKAGE REMOVAL AND SETUP (FAC-
TORY OPTION)
NOTE: Economizer and two position damper are not available
as factory installed options for single phase (-3 voltage code)
models.
The hood is shipped in knock-down form and must be
field assembled. The indoor coil access panel is used as the
hood top while the hood sides, divider and filter are pack-
aged together, attached to a metal support tray using plastic
stretch wrap, and shipped in the return air compartment be-
hind the indoor coil access panel. The hood assembly's met-
al tray is attached to the basepan and also attached to the
damper using two plastic tie-wraps.
1.
To gain access to the hood, remove the filter access
panel. See Fig. 8.
FILTER ACCESS PANEL
Fig. 8 — Typical Access Panel Locations
2.
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. 9.
Be careful to not damage any wiring or cut tie-wraps
securing any wiring.
Fig. 9 — Economizer and Two-Position Damper Hood
Parts Location
3.
Carefully lift the hood assembly (with metal tray)
through the filter access opening and assemble per the
steps outlined in the Economizer Hood and Two-Posi-
tion Hood section.
COMPRESSOR
ACCESS PANEL
OUTDOOR-AIR OPENING AND
INDOOR COIL ACCESS PANEL
Hood Parts
Plastic Tie Wrap
Qty (2)
Screws for
Metal Tray
Qty (2)
ECONOMIZER AND TWO-POSITION HOOD
NOTE: If the power exhaust accessory is to be installed on the
unit, the hood shipped with the unit will not be used and must
be discarded. Save the aluminum filter for use in the power ex-
haust hood assembly.
1.
The indoor coil access panel will be used as the top of
the hood. Remove the screws along the sides and bot-
tom of the indoor coil access panel. See Fig. 10.
INDOOR
COIL
ACCESS
PANEL
Fig. 10 — Indoor Coil Access Panel Relocation
2.
Swing out indoor coil access panel and insert the hood
sides under the panel (hood top). Use the screws pro-
vided to attach the hood sides to the hood top. Use
screws provided to attach the hood sides to the unit. See
Fig. 11.
LEFT
HOOD
SIDE
19 1/16"
B
(483mm)
Fig. 11 — Economizer Hood Construction
3.
Remove the shipping tape holding the economizer
barometric relief damper in place (economizer only).
4.
Insert the hood divider between the hood sides. See
Fig. 11 and 12. Secure hood divider with 2 screws on
each hood side. The hood divider is also used as the
bottom filter rack for the aluminum filter.
5.
Open the filter clips which are located underneath the
hood top. Insert the aluminum filter into the bottom fil-
ter rack (hood divider). Push the filter into position past
the open filter clips. Close the filter clips to lock the fil-
ter into place. See Fig. 12.
6.
Caulk the ends of the joint between the unit top panel
and the hood top.
7.
Replace the filter access panel.
11
TOP
PANEL
TOP
PANEL
CAULK
HERE
TOP
PANEL
INDOOR COIL
ACCESS PANEL
SCREW
33 3/8"
(848mm)
HOOD DIVIDER
INDOOR
COIL
ACCESS
PANEL
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