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ground level
Ground level installations must be located according to
local building codes or ordinances and these requirements:
• Clearances must be in accordance with those shown
in Figure 2 (page 6).
• A suitable mounting pad (Figure 4) must be provided
and be separate from the building foundation. The pad
must be level to ensure proper condensate disposal
and strong enough to support the unit's weight. The
slab height must be a minimum of 2" (5cm) above grade
and with adequate drainage.
• Ductwork should be attached directly to flanges on the
supply and return panels.
2"
Figure 4. ground level installation
Rooftop
Rooftop installations must be located according to local
building codes or ordinances and these requirements:
• The roof must be capable of handling the weight of the
unit. For unit weights, see Table 7 (page 16). Reinforce
the roof if necessary.
• The appropriate accessory roof curb (Figure 5) must be
installed prior to unit installation. The roof curb must be
square and level to ensure proper condensate drainage.
Please follow all instructions provided with the kit.
• Secure roof curb or frame to roof using acceptable
mechanical methods per local codes. noTe: Make sure
the two supports beneath the unit have been removed.
Roof
Curb
Figure 5. Roof Top installation
8
elecTRical wiRing
waRning:
Shut off all electrical power to the unit before
performing any maintenance or service on the
system. Failure to comply may result in personal
injury or death.
• Electrical connections must be in compliance with
all applicable local codes and ordinances, and with
the current revision of the National Electric Code
(ANSI/NFPA 70).
• For Canadian installations the electrical connections
and grounding shall comply with the current Canadian
Electrical Code (CSA C22.1 and/or local codes).
Pre-electrical checklist:
√ Verify that the voltage, frequency, and phase of the
supply source match the specifications on the unit
rating plate.
√ Verify that the service provided by the utility is sufficient
to handle the additional load imposed by this equipment.
refer to the unit wiring label for proper high and low
voltage wiring.
√ Verify factory wiring is in accordance with the unit wiring
diagram (Figures 11 - 12, pages 18 - 19). Inspect for
loose connections.
wiring Diagram / Schematic
A wiring diagram/schematic is located on the inside cover of
the electrical box of the outdoor unit. The installer should
become familiar with the wiring diagram/schematic before
making any electrical connections to the outdoor unit.
line Voltage
• It is recommended that the line voltage to the unit be
supplied from a dedicated branch circuit containing
the correct fuse or circuit breaker for the unit.
• an electrical disconnect must be located within
sight of and readily accessible to the unit. This
switch shall be capable of electrically de-energizing the
outdoor unit. See unit data label for proper incoming field
wiring. Any other wiring methods must be acceptable
to authority having jurisdiction.
• Overcurrent protection must be provided at the branch
circuit distribution panel and sized as shown on the unit
rating label and according to applicable local codes.
See the unit rating plate for maximum circuit ampacity
and maximum overcurrent protection limits.
• Provide power supply for the unit in accordance with
the unit wiring diagram, and the unit rating plate.
• Connect the line-voltage leads to the terminals on the
contactor inside the control compartment.
• Use only copper wire for the line voltage power supply
to this unit as listed in Table 1 (page 10). Use proper
code agency listed conduit and a conduit connector
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