Page 5
Shipping and Packing List
Package 1 of 1 contains:
1- Assembled unit
IMPORTANT - Hot gas reheat units require a specific
field-provided and installed humidity sensor.
Check unit for shipping damage. Receiving party should
contact last carrier immediately if shipping damage is found.
General
These instructions are intended as a general guide
and do not supersede local codes in any way.
Authorities having jurisdiction should be consulted
before installation.
The LGH092, 094, 102, 120, 122, 150 & 152
gas/electric packaged rooftop unit is available in
130,000, 180,000, or 240,000 Btuh heating inputs.
The LCH092, 094, 102, 120, 122, 150 & 152 cooling
packaged rooftop unit is the same basic design as the
LGH unit except for the heating section. Optional
electric heat is factory- or field-installed in LCH units.
Ultra high efficiency units have a tandem refrigerant
circuit. High efficiency units have two typical circuits.
High efficiency units are equipped with a lightweight,
all-aluminum condenser coil; an optional, traditional
fin/tube condenser coil is available. Ultra high efficiency
units are equipped with a traditional fin/tube condenser
coil.
High efficiency units are available with an optional hot gas
reheat coil which provides a dehumidifying mode of
operation. Refer to Reheat Operation section.
Ultra high efficiency units are available with an optional
direct drive blower or belt drive blower equipped with an
optional supply air inverter (variable frequency drive or
VFD). High efficiency units are available with a belt drive
blower equipped with an optional supply air inverter. The
blower will operate at lower speeds when demand is low
and increase to higher speeds when demand is high.
Refer to Inverter and Direct Drive Start−Up section.
The following examples show the model numbers of ten
ton units with blower options.
LGH/LCH120H4
B
Belt drive
LGH/LCH120H4
M
Belt drive with inverter
LGH/LCH122U4
M
Belt drive with inverter
LGH/LCH122U4
E
Direct drive
All units are available using R410A, an ozone-friendly HFC
refrigerant. Refer to the Cooling Start-Up section for
precautions when installing unit.
Safety
See table 1 for unit clearances.
WARNING
Electric shock hazard and danger of
explosion. Can cause injury, death or
product or property damage. Turn off
gas and electrical power to unit before
performing any maintenance or
servicing operations on the unit. Follow
lighting instructions attached to unit
when putting unit back into operation
and after service or maintenance.
UNIT CLEARANCES
C
D
B
A
FIGURE 1
Optional
Outdoor
Air Hood
TABLE 1
UNIT CLEARANCES
1Unit
Clearance
A
in.(mm)
B
in.(mm)
C
in.(mm)
D
in.(mm)
Top
Clearance
Service
Clearance
60
(1524)
36
(914)
36
(914)
60
(1524)
Unob
structed
Clearance to
Combus
tibles
36
(914)
1 (25)
1 (25)
1 (25)
Unob
structed
Minimum
Operation
Clearance
36
(914)
36
(914)
36
(914)
36
(914)
Unob
structed
Note - Entire perimeter of unit base requires support when elevated above
mounting surface.
1
Service Clearance
- Required for removal of serviceable parts.
Clearance to Combustibles
- Required clearance to combustible material
(gas units).
Minimum Operation Clearance
- Required clearance for proper unit
operation.
