Nortek R104HD Series, Installation Instructions Manual

Page: 9 / 52

9
UNIT INSTALLATION
Packaging Removal
Remove the shipping carton and User’s Manual from the
equipment. Set aside the 13” x 2” PVC pipe for later use
when installing the heat exchanger condensate drain and
vent kit. Take care not to damage the coil or cabinet when
removing the carton. For rooftop installations, remove
and discard the two supports attached beneath the unit
Rigging & Hoisting
WARNING:
To avoid the risk of property damage, personal
injury, or death, it is the rigger’s responsibility
to ensure that whatever means are used to hoist
the unit are safe and adequate:
• The lifting equipment must be adequate for the
load. Refer to
Table 7 (page 27)
for unit weights.
• The unit must be lifted from the holes in the
base rails using cables or chains.
• Spreader bars are required to protect the unit
and ensure even loading.
• Keep the unit in an upright position at all times.
The rigging must be located outside the units
center of gravity. Refer to
Figure 7 (page 19)
for locating the center of gravity.
• All panels must be securely in place during
rigging and hoisting, except control access
panel. See
page 47
for additional lifting and
setting of unit requirements.
Clearances to Combustible Materials
These units are certified as combination heating and
cooling equipment for outdoor rooftop or ground level
installations. Units may be installed on combustible
flooring or class A, B, or C roofing material when used
with bottom supply and return air ducts as long as the
following requirements are met:
• If using bottom discharge with return air ducts a roof
curb must be installed prior to unit installation. See
Rigging and Hoisting section for setting of the unit.
• Sufficient clearance for unobstructed airflow through the
outdoor coil must also be maintained in order to achieve
rated performance. For information about locating the
equipment, see page 5 .
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 1 (page 5) .
• A suitable mounting pad 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. See Figure 3 .
• Remove and discard the horizontal Supply and Return
duct covers located on the rear of the unit. Form duct
Figure 3. Ground & Rooftop Installation
2”
ROOFTOP INSTALLATION
GROUND LEVEL INSTALLATION
ACCESSORY
ROOF CURB
attachment flanges by bending the sheet metal outward
90 degrees along the perforated lines.
• Firmly attach ductwork directly to these flanges with
screws or other approved mechanical connections and
not to the Supply/Return air panels to avoid damage to
internal components of the equipment. Use approved
duct sealing methods to ensure an air and watertight
seal is achieved.
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. Reinforce the roof if necessary For unit weights,
see Table 7 (page 27) .
• The appropriate accessory roof curb must be installed
prior to unit installation. The roof curb must be square
and level to ensure proper condensate drainage. See
Figure 2 (page 7) .
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.