Catalogue

88 UV-PRC003-EN
Mechanical Specifications
with a maximum ambient operating temperature of 104°F and are permanently lubricated. Motors
are capable of starting at 50 percent of rated voltage and operating at 90 percent of rated voltage
on all speed settings. Motors can operate up to 10 percent over voltage.
Drain Pan(s)
The unit drain pan consists of a corrosion resistant, environmentally friendly, dual sloped design
to facilitate condensate removal quickly. The pan is removable for cleaning. Hook-up to the drain
pan for condensate removal is made on the cooling coil union side. The drain side connection shall
be easily field-inverted by removing and rotating the pan 180°.
An auxiliary drain pan (optional accessory) is factory-provided, and field-installed under the main,
cooling piping package. It is constructed of the same corrosion resistance material found in the
main unit drain pan. The auxiliary pan will effortlessly fit into the end pocket for condensate
disposal of the piping package.
Hydronic Coils (option)
All hydronic coils are a plate-fin type, mechanically bonded to tubes. The coils are hydrostatically
tested to 350 psig and burst tested to 450 psig. The coils are rated in accordance with AHRI-840.
A threaded drain plug is provided at the header’s lowest point, and a manual air vent provided at
its highest point.
The standard 4-pipe heating coil is placed in the preheat location. Optional 4-pipe heating coils are
available in the reheat position for dehumidification control.
Refrigerant Coils (option)
Direct expansion coils contain copper tubes mechanically expanded into evenly spaced aluminum
fins. All coils are proof and leak tested before leaving the manufacturer. The proof test is performed
at 1.5 times the maximum operating pressure, and leak tested at the maximum operating pressure.
In addition, the tubes are completely evacuated of air to check for leaks in the vacuum.
The refrigerant coil distributor assemblies is Venturi or orifice style with round copper distributor
tubes.
Distributors are sized consistently with capacity of coil. Suction headers are fabricated from round
copper pipe.
A thermostatic expansion valve (TXV) is factory selected and installed for a wide-range of control
to maintain optimum control of superheat. All coils are shipped with a dry nitrogen holding charge.
Electric Coil (option)
Units equipped for electric heat contain a special resistance, heating element design inserted in an
extended surface fin-tube bundle for maximum element life and safety. Units specifying electric
heat include (as standard) a high temperature cut out with a continuous sensing element. This
device interrupts electrical power whenever excessive temperatures are sensed anywhere along
the leaving side of the coil. A contactor (also provided) ensure positive disconnect of electrical
power whenever the fan motor power is interrupted. All electric heat units have a power wiring
console in the right hand end-pocket to better facilitate field wiring of the unit.
Steam Coil (option)
Units including a steam coil are of a 5/8-inch, sigma-flow, tube-in-tube, distributing coil design.
Steam coil tubing is mechanically expanded into evenly spaced aluminum fins. The supply and
return connections are on the same side, and include a 1-inch female pipe thread (FPT) termination.
The coil is pitched by the manufacturer to provide condensate drainage for freeze protection.
Outside Air/Return Air Damper
Each unit ventilator is equipped with a linkage free, air-tight damper design. This linkage free
design results in a fixed air seal of the damper assembly.
UV-PRC003-EN.book Page 88 Tuesday, June 4, 2013 8:59 PM