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LHT/LDT156, 180, 240
Shipping and Packing List
Package 1 of 1 contains:
1- Assembled unit
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.
LHT packaged heat pump and LDT packaged dual-fuel
units have identical refrigerant circuits with respective
13-, 15-, and 20-ton cooling capacities. Units contain two
compressors; compressor 1 is two-speed and
compressor 2 is fixed speed.
Units are equipped with factory-installed fin/tube outdoor
coils.
Optional electric heat is factory- or field-installed in LHT
units.
The LDT156 unit is available in 169,000, 260,000, and
360,000 Btuh heating inputs. LDT180 and 240 units
are available in 169,000, 260,000, 360,000, and
480,000 Btuh heating inputs.
Units are available with multi-staged air volume.
Units use R410A, an ozone-friendly HFC refrigerant.
Refer to the Cooling Start-Up section for precautions
when installing unit.
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.
Requirements
See figure 1 for unit clearances.
UNIT CLEARANCES
C
D
B
A
FIGURE 1
Optional
Outdoor
Air Hood
1
Unit
Clearance
A
in.(mm)
B
in.(mm)
C
in.(mm)
D
in.(mm)
Top
Clearance
Service
Clearance
60
(1524)
36
(914)
36
(914)
66
(1676)
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)
41
(1041)
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
(dual-fuel units). On LHT units, see clearance to combustible materials
outlined on heater rating plate.
Minimum Operation Clearance - Required clearance for proper unit operation.
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