JOHNSON CONTROLS
47
SECTION 3 - HANDLING, STORAGE, AND INSTALLATION
FORM 102.20-N1
ISSUE DATE: 7/06/2016
3
Installing Hood with Moisture Eliminators
1. Identify the correct hood and its respective loca-
tion by looking at the label as shown in
in this manual.
2. Correct orientation is with the tracks or bird
screens to the bottom. The mounting flanges are
pre-drilled.
3.
Each hood is fitted with a factory installed bird
screen unless the moisture eliminator option is se-
lected.
4.
Apply the Butyl tape to the pre-drilled hood flang
-
es and back wall angle that contact the AHU pan-
els.
5. Use the hex head screws with the EPDM washer
provided in the fastener pack.
6. Completely cover each damper opening in the
AHU panels by its respective hood. The bottom of
the hood should extend approximately 6 in. below
the AHU panel opening.
7. Center each hood over the width of the opening.
All hoods, especially those containing barometric
dampers, MUST be installed square.
8. Seal each hood gutter to the AHU panel with the
polyurethane caulk (provided).
9. When multiple hoods are installed in a stacked
space, the hoods should be approximately 1 1/2
in. apart so that the bottom hood will extend 6 in.
below the bottom of the opening.
10. If equipped, install the optional moisture elimina-
tors as shown in
following instructions.
a. Remove the clip(s) from the leading edge of
the hood.
b. Insert the proper size moisture eliminator or
filter into the tracks.
c. Reinstall the clip(s) on the leading edge of
the hood.
Outdoor Air Temperature and/or Humidity
Sensors
When outside air hoods are shipped loose with AHUs
that include factory packaged controls, these sensors
will be dismounted and pulled back into the AHU. The
contractor should find them secured with tape inside,
and put them through their respective penetration to the
exterior, and mount them to the bracket provided.
MOISTURE
ELIMINATOR
CLIP
BUTYL
TAPE
CAULK
FIGURE 71 -
INSTALLING HOOD WITH OPTIONAL MOISTURE ELIMINATORS
LD13783
