Catalogue

UV-PRC004-EN 61
Mechanical Specifications
General
Deliver and install a complete unit ventilator certified for ventilation at AHRI-840, or tested by an
independent testing and balancing lab witnessed by owner’s representative. All non-AHRI
manufacturers shall be within 10 percent of catalog airflow and capacities, or removal of these
units from the jobsite may be required at the expense of the manufacturer or contractor.
Safety
All standard units are UL-listed in the United States and Canada and comply with NFPA 90A
requirements.
The unit ventilator is certified or rated in accordance to the following listings for performance proof
and safety: UL, AHRI-840, AHRI-350, L
ONMARK
®
, BACnet
®
Equipment Construction
Exterior cabinetry is constructed of heavy-gauge metal for strength and durability. All exposed
edges are rounded to safeguard against injury. All interior sheet metal is galvanized steel to restrain
against deterioration.
The bottom plane of the unit shall consist of a two panel design. A hinged panel option is provided
as part of the equipment options to help alleviate hazards from falling panels during maintenance
or inspection purposes. The control compartment is accessible without removing the entire bottom
panel. The unit discharge grilles are welded or screwed in-place to become an integral part of the
unit structure. The rounded edge steel bars are placed at a 10° slope to provide proper airflow
deflection.
Access for inspection and cleaning of the unit drain pan, coils, and fan section are provided. The
unit shall be installed for proper access. Procedures for proper maintenance of the unit are included
in the installing, operation manual.
Cabinet insulation is 1/2-inch thick, dual density bonded glass fiber. The exposed side is a high
density, erosion proof material suitable for use in air streams up to 4500 feet per minute (FPM).
Insulation shall meet the Underwriters’ Laboratories Fire Hazard Classification.
Piping and control end pockets are a minimum of 12 inches wide to facilitate coil piping and service
access. If standard end pock is less than 12 inches wide, an extended cabinet are provided.
Final finish is cleaned, phosphatized and painted with an electrostatic powder spray system, with
a minimum thickness of 1.5 mil to avoid visible runs and resist abrasion.
Unit Fans
The unit fan board assembly shall ship from the factory wired to the commission schedule for
engineered cfm expectancy. A motor speed switch is on the unit or wall for motor speed
adjustment.
The fan board is a single, rigid construction, made from corrosion resistive material. It is a trouble-
free slide design to provide cleaning and serviceability ease to maintenance personnel.
The fans contain a double width/double inlet, forward curved centrifugal design to sustain
appropriate air throw into the space. The wheels are galvanized metal to resist corrosion. The
dynamically balanced fan and motor are of direct drive style.
The fan and coil arrangement are of a blow-thru configuration to supply unvarying coil face velocity
avoiding cold spots on the coil.
Motors
All motors are brushless DC (BLDC)/electronically commutated motors (ECM) factory-
programmed and run-tested in assembled units. The motor controller is mounted in a touch-safe
control box with a built-in integrated user interface and LED tachometer. If adjustments are needed,
motor parameters can be adjusted through momentary contact switches accessible without
factory service personnel on the motor control board. Motors will soft-ramp between speeds to
UV-PRC004-EN.book Page 61 Monday, February 4, 2013 11:01 AM