Reznor P8SE Unit Installation Manual - Manual (Page 5)

5
• Duct work should be attached directly to the unit flanges
for horizontal applications.
• If roof curb is installed, the ducts must be attached to
the curb hangers, not the unit.
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.
air Filter requirements
Warning:
never operate the unit without a filter in place.
dust and lint could accumulate on internal parts,
resulting in loss of efficiency, equipment damage
and possible fire. replace disposable filters with
the same type and size.
• Air filter(s) are not supplied and must be installed in
the unit or in the return air system by the installer. Only
three phase units are equipped with an internal filter
rack assembly.
• If using an economizer or fresh air equipment, the factory
installed filter rack must be removed prior to installation.
See
page 6 for removal instructions.
• All return air must pass through the filters before entering
the unit. Recommended filter sizes are listed in Table 1 .
note: It is important that all filters be kept clean and
replaced frequently to ensure proper operation of unit.
Dirty or clogged filters will reduce the efficiency of the
unit and result in unit shutdowns.
• Air filter pressure drop must not exceed 0.08 inches
WC. When replacing the air filters, a suitable air filter
must be installed upstream of the evaporator coil of the
return air system.
• Downflow Installations require an internal filter accessory
kit to be installed.
• Horizontal Installations require the air filter system be
installed in the return air ductwork.
air conditioner inStallation
Packaging removal
Remove the shipping carton and User’s Manual from
the equipment. Take care not to damage the tubing
connections when removing the carton. For rooftop
installations, remove and discard the two supports attached
beneath the unit.
rigging and 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 5, (page 9) 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 9, (page 14) for
locating the center of gravity.
• All panels must be securely in place during
rigging and hoisting.
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 4) .
• A suitable mounting pad must be provided and 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 2, (page 6) .
• Allow sufficient clearances for access to the internal
filter rack.
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 5, (page 9) . Reinforce
the roof if necessary.
unit SiZe internal Filter SiZe
P8SE-X36
P8SE-X48
(2) 14” x 25”
or
(2) 14” x 25”
P8SE-X60
(2) 18” x 25”
or
(2) 18” x 25”
table 1. internal Filter Size requirements.