Duct Connection; Rigging Unit For Lifting; Condensate Drains; Horizontal Discharge Applications - Lennox LGH180H Installation Instructions Manual

B-Horizontal Discharge Applications
1- Units installed in horizontal airflow applications must
use an LARMFH18/24 horizontal roof mounting
frame. The supply air duct connects to the horizontal
supply air opening on the LARMFH18/24. The return
air duct connects to the unit horizontal return air
opening. Refer to unit dimensions.
2- Specified installation clearances must be maintained
when installing units. Refer to figure 1.
3- Top of support slab should be approximately 4"
(102mm) above the finished grade and located so no
run-off water from higher ground can collect around
the unit.
4- Units require support along all four sides of unit base.
Supports must be constructed of steel or suitably
treated wood materials.

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- Connect rigging to the unit base using both holes in
each corner.
3- All panels must be in place for rigging.
4- 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.)
LGH/LCH156, 180, 210, 240, 300S
LG 156, LC 156, LC 180H
LG 180H, LC180U, LG 210
LC 210, LC 240, LC 300
LG 180U, LG 240, LG 300
*Maximum weight with all available factory-
installed accessories.
LIFTING POINT SHOULD BE DIRECTLY
ABOVE CENTER OF GRAVITY

Condensate Drains

Remove cap and make drain connection to the 1"
N.P.T. drain coupling provided on unit. A trap must be
installed between drain connection and an open vent
for proper condensate removal. See figure 3. 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 2, 3 and 4 for
condensate drain location.
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.
Page 8
RIGGING
*Weight
Unit
Lbs. Kg.
2350 1066
2855 1295
3000 1361
IMPORTANT - ALL PANELS MUST
BE IN PLACE FOR RIGGING.
CAUTION - Do not
walk on unit.
FIGURE 2