Lennox LGH 036 Installation Instructions Manual page 112

GED (Barometric Relief Dampers)
Note − GED is optional when economizer is factory−installed.
Remove GED from the economizer (when present) and
install in the exhaust air hood when:
SOptional power exhaust fans are installed
SEconomizer is installed in horizontal air flow
1− Remove the GED from the economizer. See figure 5.
2− Install the GED in the exhaust or lower hood as shown
in figure 7.
REMOVE GED
FIGURE 5
INSTALL
PIVOT
BRACKETS
INSTALL
GED
SEAL
MAKE SURE SEAL
IS INSTALLED
BEFORE HOOD
INSTALL PIVOTING BRACKETS AND GED SEAL
(FIELD−INSTALLED ECONOMIZERS ONLY)
REMOVE AND RE-
USE SCREWS (3) TO
INSTALL BRACKET
FIGURE 6
Page 4
Outdoor Air Hoods
Factory−Installed Economizers Only −
Both hood tops and pivot brackets are secured to unit.
The lower hood is provided and installed only when the
economizer is equipped with an optional GED. Hood
parts are located under the exhaust panel and in blower
section. Lift hood tops and assemble hoods as described
for field−installed economizers.
1− Make sure all sensors and outdoor air section
accessories are installed before installing hoods.
2− Install pivot brackets and seal on unit as shown in
figure 6.
3− Assemble hoods as shown in figure 7. Slide top of
hoods into the ends of pivot brackets. Install
birdscreen bracket after birdscreens are in place.
4− Install hoods on unit as shown in figure 8.
5− Caulk ends of pivot bracket to seal watertight.
SIDE VIEW
UNIT TOP
MULLION
PIVOT
BRACKET
POWER EXHAUST SHOWN;
GRAVITY EXHAUST LOCATED
HERE WHEN UNIT IS NOT
EQUIPPED WITH PED