Lennox LCH036 Installation Instructions Manual page 4

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 LGH units are available in three heating inputs. The
LCH cooling packaged rooftop unit is the same basic
design as the LGH unit except for the heating section.
Optional electric heat is available for LCH units. LGH and
LCH units have identical refrigerant circuits with
respective 3, 4, 5, and 6 ton cooling capacities.
Units come standard with a lightweight, all-aluminum
condenser coil. Units are also available with an optional
fin/tube condenser coil.
In addition to standard heating and cooling, hot gas
reheat units provide a dehumidifying mode of operation.
Refer to Reheat Operation section.
Units may be equipped with a Unit Controller that is
factory-configured for "Advanced Air Flow Control". This
option allows the installer
design-specified supply air CFM and outdoor air CFM.
See the Advanced Air Flow Control Start-Up section.
These units are equipped with a variable speed, direct
drive blower and an economizer.
Availability of units and options varies by brand.
Requirements
See figure 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.
IMPORTANT
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.
to enter both the
any maintenance or
NOTICE
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
surface to avoid exposure to refrigerant and oil
during service and installation. Failure to follow
this notice could result in damage to roof surface.
UNIT CLEARANCES
D
1 Unit
in.(mm)
Clearance
Service 48
Clearance (1219)
Clearance to 36
Combustibles (914)
Minimum Opera­ 36
tion Clearance (914)
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.
Use of this unit as a construction heater or air conditioner
is not recommended during any phase of construction.
Very low return air temperatures, harmful vapors and
operation of the unit with clogged or misplaced filters will
damage the unit.
If this unit has been used for heating or cooling of
buildings or structures under construction, the following
conditions must be met or the warranty will be void:
S A room thermostat must control the unit. The use of
fixed jumpers that will provide continuous heating or
cooling is not allowed.
S A pre-filter must be installed at the entry to the return
air duct.
S The return air duct must be provided and sealed to
the unit.
S Return air temperature range between 55°F (13°C)
and 80°F (27°C) must be maintained.
Page 4
C
B
A
FIGURE 1
A B C D
in.(mm) in.(mm) in.(mm)
36 36 36
(914) (914) (914)
1 1 1
(25) (25) (25)
36 36 36
(914) (914) (914)
LGH/LCH036, 048, 060, 072
Top
Clearance
Unob­
structed
Unob­
structed
Unob­
structed