ICP PGN324 Installation instructions manual - Caution
3
• All connecting ductwork to the unit (supply and return)
must be sealed to the unit casing as specified in section 7.
• Do NOT use this furnace as a construction heater.
• 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.
UNIT SAFETY
CAUTION
!
Failure to follow this caution may reduce unit reliability.
It is recommended that a qualified service technician
check the heat exchanger integrity every two (2) years,
after the first four (4) years of operation.
INTRODUCTION
The PGN3 unit is a fully self--contained, combination
Category I gas heating/electric cooling unit designed for
outdoor installation (See Fig 3 and 4 for unit dimensions).
All unit sizes have return and discharge openings for both
horizontal and downflow configurations, and are
factory--shipped with all downflow duct openings covered.
Units may be installed either on a rooftop or at ground level.
Models with a ”1” in the twelfth position of the model number
are dedicated Low NOx units designed for California
installations. The emissions of these models do not exceed
40 nanograms of nitrogen oxide emissions per joule of heat
output as shipped from the factory, and must be installed in
California Air Quality Management Districts or any other
regions in North America where a Low NOx rule exists.
RECEIVING AND INSTALLATION
Step 1—Check Equipment
IDENTIFY UNIT
The unit model number and serial number are stamped on
the unit information plate. Check this information against
shipping papers.
INSPECT SHIPMENT
Inspect for shipping damage while unit is still on shipping
pallet. If unit appears to be damaged or is torn loose from
its anchorage, have it examined by transportation
inspectors before removal. Forward claim papers directly to
transportation company. Manufacturer is not responsible
for any damage incurred in transit. Check all items against
shipping list. Immediately notify the nearest equipment
distribution office if any item is missing. To prevent loss or
damage, leave all parts in original packages until
installation.
Step 2—Provide Unit Support
For hurricane tie downs, contact distributor for details and
PE (Professional Engineering) Certificate if required.
ROOFCURB
Install accessory roof curb in accordance with instructions
shipped with curb. Install insulation, cant strips, roofing, and
flashing. Ductwork must be attached to curb.
IMPORTANT: The gasketing of the unit to the roof curb is
critical for a water tight seal. Install gasketing material
supplied with the roof curb. Improperly applied gasketing
also can result in air leaks and poor unit performance.
Curb should be level to within 1/4 in. (6mm) This is
necessary for unit drain to function properly. Refer to
accessory roof curb installation instructions for additional
information as required.
SLAB MOUNT
Place the unit on a solid, level concrete pad that is a
minimum of 4 in. (102mm) thick with 2 in. (51mm) above
grade (See Fig. 2). The slab should extend approximately
2 in. beyond the casing on all 4 sides of the unit. Do not
secure the unit to the slab except when required by local
codes.
OPTIONAL
RETURN
AIR
OPENING
OPTIONAL
SUPPLY
AIR
OPENING
EVAP. COIL
COND. COIL
2"
FIGURE 2
Slab Mounting Details
ADDITIONAL
GROUND
LEVEL
PLATFORM
REQUIREMENTS
The unit MUST be situated to provide safe access for
servicing.
The unit must be level and supported above grade by
beams, platform, or a pad.
Platform or pad can be of open or solid construction but
should be of permanent materials such as concrete, bricks,
blocks, steel, or pressure--treated timbers approved for
ground contact. Soil conditions must be considered so that
the platform or pad does not shift or settle and leave the unit
partially supported.
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.
Step 3—Field Fabricate Ductwork
Secure all ducts to roof curb and building structure on
vertical discharge units. Do not connect ductwork to unit.
For horizontal applications, unit is provided with flanges on
the horizontal openings. All ductwork should be secured to
the flanges. Insulate and weatherproof all external
ductwork, joints, and roof openings with counter flashing
and mastic in accordance with applicable codes.
Ducts passing through an unconditioned space must be
insulated and covered with a vapor barrier.
If a plenum return is used on a vertical unit, the return should
be ducted through the roof deck to comply with applicable
fire codes.
A minimum clearance is not required around ductwork.
Cabinet return--air static shall not exceed --.25 in. wc.