Specifications

PRO-C Series
16
Sample Specifications
CASING
Standard panels shall be 20 gauge galvanized steel, lined with
1/2 inch thick neoprene insulation where required. The
housing shall be supported by a formed structural base that
forms a pan to ensure weather tight construction. Lifting
holes shall be provided at the unit base. Units shall have
a weatherproof sheet metal roof. The outdoor air intake
opening shall be protected by a galvanized steel sheet metal
weather hood and include an automatic shutoff damper
with electric operator. The exhaust air discharge shall be
covered with a gravity backdraft damper and weather hood.
The exterior of the unit shall be coated with an epoxy
primer and a polyurethane enamel painting system for added
protection. Painting system shall be rated to meet a 1500
hour salt spray test.
Access
Access to components shall be provided through a large,
tightly sealed and easily removable access panel. Access
panels shall be constructed of the same materials as the unit
casing and use standard hardware. The wheel cassette shall
be easily removable from the unit. The roof of the unit shall
also be removable for access.
Unit Configuration
The supply air inlet and exhaust air outlet must be oriented at
opposite sides of the Energy Recovery System to maximize
the distance between the two airstreams in order to minimize
the risk of short circuiting exhaust air into the supply air
intake.
FANS
Fans shall have forward curve type wheels. The blades shall
be designed for maximum effi ciency and quiet operation.
Impellers shall be statically and dynamically balanced.
Fans shall be driven by direct drive motors located at the fan
inlet or by motors using belts and sheaves. Motors shall be
standard NEMA frame with open drip-proof enclosures.
V-belt drives shall be designed for a minimum 1.2 service
factor.
TOTAL ENERGY WHEEL
The rotor media shall be made of aluminum which is
coated to prohibit corrosion. The rotor media shall be
coated with a non-migrating adsorbent to transfer water
vapor and to prohibit corrosion. Equal sensible and latent
recovery effi ciencies shall be clearly documented through
a certification program conducted in accordance with
ASHRAE 84-91 and ARI 1060 standards. The media
shall be cleanable with low temperature steam, hot water
or light detergent, without degrading the latent recovery.
Dry particles up to 600 microns shall freely pass through
the media. Wheel media shall be independently tested and
shown to have a fl ame spread of less than 25 and a smoke
generation rating of less than 50 when tested in accordance
with ASTM-E-87.
Rotor Cassette
The rotor cassette shall be a sheet metal framework which
limits the defl ection of the rotor due to air pressure. The
cassette shall be made of galvanized steel to prevent
corrosion. The rotor cassette shall be easily removable from
the Energy Recovery Unit to facilitate rigging (if necessary)
and ease of service. The wheel cassette design shall use
pillow block bearings for long life. A non-adjustable purge
sector shall be included in the cassette.
FILTERS
The filters shall be 1 inch thick permanent aluminum
washable type mounted in the outside air hood and in the
return air plenum. The fi lters shall be listed by Underwriters’
Laboratories as Class 2.
Optional Rotation Detector
Unit shall be equipped with a rotation sensor and controller
such that should the energy recovery wheel not rotate during
a signaled run period, the controller shall send a 24 volt AC
signal suitable for operating a relay to be used as an alarm
contact. The controller shall not initiate an alarm during a
stop/jog function.
Optional Stop/Jog Economizer
Unit shall be equipped with an outdoor air temperature
sensor and controller such that the energy recovery wheel
can be stopped during moderate temperature periods. The
controller shall perform a stop/jog function for the wheel
long enough to promote the self cleaning features of the
wheel but not long enough to induce energy recovery.
Optional Wheel Stop/Jog Frost Protection
Unit shall be equipped with an outdoor air temperature
sensor and controller such that the energy recovery wheel
can be operated in stop/jog mode during very low outdoor
air temperature periods to prevent freezing of the wheel
while still delivering outdoor air through the unit.
Optional Electric Preheat Coil
Coil shall be of the resistance coil type with elements
enclosed in a steel sheath with fi ns and painted with a
baked-on aluminum paint for long life in a 100% fresh air
stream. Coil shall include thermal cutout protection with
automatic primary protection and a secondary manual reset
linear thermal cutout. Coil shall have magnetic safety and