Reznor R6GI Unit Installation Manual - Manual (Page 9)

9
Unconditioned Spaces
All duct work passing through unconditioned space must
be properly insulated to minimize duct losses and prevent
condensation. Use insulation with an outer vapor barrier.
Refer to local codes for insulation material requirements.
Acoustical Duct Work
Certain installations may require the use of acoustical
lining inside the supply duct work.
• Acoustical insulation must be in accordance with the
current revision of the Sheet Metal and Air Conditioning
Contractors National Association (SMACNA) application
standard for duct liners.
• Duct lining must be UL classified batts or blankets with
a fire hazard classification of FHC-25/50 or less.
• Fiber duct work may be used in place of internal duct
liners if the fiber duct work is in accordance with the
current revision of the SMACNA construction standard
on fibrous glass ducts. Fibrous duct work and internal
acoustical lining must be NFPA Class 1 air ducts when
tested per UL Standard 181 for Class 1 ducts.
UNIT INSTALLATION
Packaging Removal
Remove the shipping carton and User’s Manual from the
equipment. 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 11, (page 26)
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 10 (page 26)
& Figure 11 (page 29)
for locating the center
of gravity.
• All panels must be securely in place during
rigging and hoisting.
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:
Figure 3
2”
Figure 3. Ground Level Installation
• 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 ( Figure 3 ) 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.
• Remove and discard the horizontal Supply and Return
duct covers located on the rear of the unit. Form duct
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. Once completed
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 11, (page 26) .
• 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 4 (page 10) .
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.