Duct Connection; Rigging Unit For Lifting; Horizontal Air Discharge - Lennox LGT036 Installation Instructions Manual

Duct Connection

All exterior ducts, joints and openings in roof or building
walls must be insulated and weather-proofed with
flashing and sealing compounds in accordance with
applicable codes. Any duct passing through an
unconditioned space must be insulated.
CAUTION
In downflow applications, do not drill or punch
holes in base of unit. Leaking in roof may occur if
unit base is punctured.

Rigging Unit For Lifting

Rig unit for lifting by attaching four cables to holes in unit
base rail. See figure 2.
1- Detach wooden base protection before rigging.
2- Remove all six base protection brackets before
setting unit.
3- Connect rigging to the unit base using both holes in
each corner.
4- All panels must be in place for rigging.
5- Place field‐provided H‐style pick in place just above
top edge of unit. Frame must be of adequate
strength and length. (H-style pick prevents damage
to unit.)
*Weight
Unit
Lbs. Kg.
LG 891 404
LC 871 395
*Maximum weight with all available
factory-installed accessories.
LIFTING POINT SHOULD
BE DIRECTLY ABOVE
CENTER OF GRAVITY
CAUTION - Do
not walk on unit.
FIGURE 2

Horizontal Air Discharge

Unit is shipped with panels covering the horizontal supply
and return air openings. Remove horizontal covers and
place over downflow openings for horizontal air discharge.
See figure 3. Secure in place with sheet metal screws.
Units Equipped With An Optional Economizer
IMPORTANT - ALL
PANELS MUST
BE IN PLACE
FOR RIGGING.
INSTALL BAROMETRIC RELIEF DAMPERS
Page 6
1- Remove the horizontal supply air cover and position
over the downflow supply air opening. Secure with
sheet metal screws.
2- Leave the horizontal return air cover in place.
3- Locate the separately ordered horizontal air
discharge kit. Place the kit panel over the downflow
return air opening.
4- Remove and retain the barometric relief dampers and
lower hood.
UNIT SUPPLY AND RETURN AIR OPENINGS
HORIZONTAL
SUPPLY AIR
HORIZONTAL
OPENING
RETURN AIR
OPENING
DOWNFLOW
RETURN AIR
OPENING
FIGURE 3
5- Install return air duct beneath outdoor air intake. See
figure 4. Install barometric relief damper in lower
hood and install in ductwork as shown in figure 4.
HORIZONTAL RETURN AIR DUCTWORK
WITH ECONOMIZER
AND HOOD IN RETURN AIR DUCT
FIGURE 4
LGT/LCT036, 048, 060, 072
DOWNFLOW
SUPPLY AIR
OPENING
UNIT UNIT
HORIZONTAL
RETURN AIR
DUCT