Rigging Unit For Lifting; Horizontal Air Discharge; Condensate Drains - Lennox LGM036 Installation Instructions Manual

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 960 435
LC 933 423
*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
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.
5- Install return air duct beneath outdoor air intake. See
IMPORTANT -
ALL PANELS
MUST BE IN
PLACE FOR RIG­
GING.
INSTALL BAROMETRIC RELIEF DAMPERS

Condensate Drains

Make drain connection to the drain coupling provided on
unit. Older model units have a 3/4" N.P.T. coupling and
newer model units have a 1" N.P.T. coupling.
Note - The drain pan is made with a glass reinforced
engineered plastic capable of withstanding typical joint
torque but can be damaged with excessive force. Tighten
pipe nipple hand tight and turn an additional quarter turn.
A trap must be installed between drain connection and an
open vent for proper condensate removal. See figure 5 or
6. It is sometimes acceptable to drain condensate onto
the roof or grade; however, a tee should be fitted to the
trap to direct condensate downward. The condensate line
must be vented. Check local codes concerning
condensate disposal. Refer to pages 1 and 2 for
condensate drain location.
Page 6
UNIT SUPPLY AND RETURN AIR OPENINGS
HORIZONTAL
SUPPLY AIR
HORIZONTAL
OPENING
RETURN AIR
OPENING
DOWNFLOW
RETURN AIR
OPENING
FIGURE 3
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
LGM/LCM036, 048, 060, 074
DOWNFLOW
SUPPLY AIR
OPENING
UNIT UNIT
HORIZONTAL
RETURN AIR
DUCT