Shipping And Packing List; General; Safety - Lennox LHT078H Installation Instructions Manual

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.
The LDT078, 092, 102, 120, & 150H heat pump/gas
heating (dual-fuel) packaged rooftop unit is available
in 130,000, 180,000, or 240,000 Btuh heating inputs.
The LHT078, 092, 102, 120, & 150 heat pump
packaged rooftop unit is the same basic design as the
LDT unit except for the heating section. Optional
electric heat is factory- or field-installed in LHT units.
Units are equipped with fin/tube outdoor coils.
Units are equipped with direct drive blowers. The blower
will operate at lower speeds when demand is low and
increase to higher speeds when demand is high. Refer to
the Direct Drive Start-Up section.
The following examples show the model numbers of ten
ton units with blower options.
LHT/LDT122H4E
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
servicing operations on the unit. Follow
lighting instructions attached to unit
when putting unit back into operation
and after service or maintenance.
Single Zone Staged Direct Drive
any maintenance
Optional
Outdoor
Air Hood
D
1 Unit
in.(mm)
Clearance
Service
Clearance (1524)
Clearance to
Combus­
(914)
tibles
Minimum
Operation
(914)
Clearance
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). On LHT units, see clearance to combustible materials as
outlined on heater rating plate.
Minimum Operation Clearance - Required clearance for proper unit operation.
Roof Damage!
This system contains both refrigerant and oil.
Some rubber roofing material may absorb oil,
causing the rubber to swell. Bubbles in the rubber
roofing material can cause leaks. Protect the roof
or
surface to avoid exposure to refrigerant and oil
during service and installation. Failure to follow
this notice could result in damage to roof surface.
The Clean Air Act of 1990 bans the intentional vent­
ing of refrigerant (CFC's and HCFC's) as of July 1,
1992. Approved methods of recovery, recycling or
reclaiming must be followed. Fines and/or incar­
ceration may be levied for non-compliance.
Page 5
UNIT CLEARANCES
C
A
FIGURE 1
TABLE 1
UNIT CLEARANCES
A B C
in.(mm) in.(mm) in.(mm)
60 36 36
(914) (914) (1524)
36
1 (25) 1 (25) 1 (25)
36 36 36
(914) (914) (914)
NOTICE
IMPORTANT
B
D Top
Clearance
60 Unob­
structed
Unob­
structed
36 Unob­
structed