10
Exercise care when moving the equipment.
Rig the equipment using
ALL
the lifting points, in a fashion that holds it level and
prevents it from tipping, falling and/ or twisting.
Spreader bars of sufficient width
MUST
be used across the top of the equipment,
to ensure that the lifting cables clear equipment cabinetry.
Utilize the same rigging and lifting methods as the ones applied to the equipment,
for lifting the accessories.
Remove all wooden shipping blocks before setting equipment onto curb (If
applicable).
After sections are set in place, assemble according to Equipment Section
Assembly. (If applicable)
NOTICE: Warranty does not cover damage from the equipment being
severely twisted or dropped during handling.
DUCTWORK
Ductwork must be sized and installed in accordance with applicable codes and standards. As a
recommendation follow SMACNA guides for proper ductwork design, size and installation. A size
variation may exist from recommended duct size to equipment or accessory flange size.
Accessories on the equipment intake or discharge may be larger than the openings on the
equipment. Be sure to check the equipment submittal drawing for the correct equipment connection
size. Recommended duct size applies to the size of the duct at the connection to the equipment.
Factory also recommends 2 1/2 times the equivalent
duct diameters of straight ductwork off the
discharge outlet of the blower. A properly designed duct transition from the blower outlet to a larger
duct is recommended for long ducts or ducts with numerous elbows. The equipment was designed
for a specific CFM and ESP (External Static Pressure) stated on equipment rating plate. The
ductwork attached to the equipment will significantly affect its performance.
On heaters mounted outdoors, discharge ductwork should be insulated to minimize
condensation during the “off” cycle in cold weather. A fresh air intake hood with bird screen is
required. Discharge ductwork on a twin blower equipment must be common to both blowers.
On a heater mounted indoors with through the roof intake, a “mushroom” type intake hood is
recommended to prevent moisture entrainment. When using “through the wall” intake duct, the
intake louver should have adequate moisture baffling characteristics. All intake ductwork exposed to
the heated space should be insulated. Also any ductwork passing through unconditioned spaces
must be insulated and covered with a vapor barrier.
SOUND AND VIBRATION CONTROL
Use of flex coupler between building ductwork and air makeup equipment is highly
recommended. Vibration isolators that mount between the equipment and support structure are
optional and can be supplied with the equipment for installation by others. Another option is internal
isolation of the blower/motor assembly with internal flexible connections between the blower housing
and the equipment structure.
Appropriate insulation on the interior of ductwork significantly reduces sound levels. Blower
selection also plays a major role.
