2. SAFE INSTALLATION REQUIREMENTS
FIRE AND ELECTRICAL SHOCK HAZARD
Failure to carefully read and follow all instructions in this
manual could result in furnace malfunction, personal
injury, death and/or property damage.
Installation or repairs made by unqualified persons can
result in hazards to you and others. Installation MUST
conform with local building codes or, in the absence of
local codes, with the National Electrical Code
NFPA70-2005 or in Canada and CSA C.22.1 - Canadian
Electrical Code Part 1.
The information containedin this manual is intended for
use by a qualified service technicianfamiliar with safety
procedures and equipped with the proper tools and test
instruments.
• Seal supply and return air ducts.
• Check to see that filters are installed correctly and are
the proper type an size.
NOTE: It is the personal responsibility and obligation of the
customer to contact a qualified installer to ensure that the
installation is adequate and conforms to governing codes
and ordinances.
3. LOCATING THE UNIT
ACCESS PANELS
See NO TAG for a general view of unit and location of
access panels.
CLEARANCES
The location MUST allow for minimum clearances and
should not be adjacent to a patio or other area where the
unit's operating sound level might be objectionable. The
combustion air inlet openings MUST not be obstructed (see
NO TAG). In addition, local codes MUST be observed.
NOTE: Units with available filter racks (3-1/2 to 5ton), need
a 26" minimum clearance at side of unit for removal of
filters. See Minimum Clearances below if unit is going to be
placed near combustible construction or materials.
While minimum clearances are acceptable for safety
reasons, they may not allow adequate air circulation around
the unit for proper operation inthe cooling mode. Whenever
possible, it is desirable to allow additional clearance,
especially around the condenser inlet and discharge
openings.
Do NOT install the unit in a location that will permit
discharged air from the condenser to recirculate to the
condenser inlet.
UNIT DAMAGE HAZARD
Failure to follow this caution may result in shorten life
of unit components.
Do NOT operate unit in a corrosive atmosphere
containing chlorine, fluorine, or any other corrosive
chemicals.
Minimum Clearances to Combustible Construction
Duct Side .................. 2" (6" on large chassis models)
Condenser Inlet .................................... 30"
Blower Service (Side) ............................... 30"
Control Service Side
(Front Combustion Air Inlet) .............. 30"
Clearance between 3 Ft. Overhang
and Top of Unit ......................... 30"
Combustible Base
(Wood or Class A, B or C
roof covering material) ..................... O"
FiGuRE i 1 Minimum Clearances
_ 36"_
3o" BlowerMotor
/ AeeesPanel
ASupPiYct I /(Side)
_ 30" _ _
InternalFilter
AccessPanel(FilterFieldSupplied)
Control Box
INSTALLATION
NOTICE
Unit will NOT operate properly unless it is installed lev-
el front to rear and side to side. The slope MUST NOT be
greater than 1/8"per foot (10mm per meter). For side to
side leveling, the drain side MUST always be lower.
Ground Level Installation
Ground level platform requirements:
- The unit MUST be situated to provide safe access for
servicing.
- Platform may be made of either concrete or pressure
treated wood and MUST be level and strong enough to
support unit weight.
- Position platform separate from building foundation.
- Install in well-drained area, with top surface of platform
above grade level.
- Platform must be high enough to allow for proper
condensate trap installation and drainage. See
FIGURE 2 and associated text for more information
about condensate drainage.
Rooftop Installation
Rooftop platform requirements:
- The unit MUST be situated to provide safe access for
servicing.
- The existing roof structure MUST be adequate to
support the weight of the unit or the roof MUST be
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