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Section 2:
Introduction and Pre-Installation:
2.1 - Description of Operation
The PR Series unit is a factory-assembled packaged
system that can operate within a broad range of ambient
conditions and introduce ventilation air into a building at
neutral conditions. It consists of matched refrigeration and
air moving components (system controls, compressor[s],
evaporator section, condensing section and fan[s])
designed to treat 100% outside air and/or recirculated
air. This system has the ability to filter, cool, heat, and/or
dehumidify air.
The unit may be provided with several different options
and/or controls to meet various application requirements,
including optional hot gas reheat, energy recovery wheel,
supplemental heat (gas, electric hot water or steam) and
variable air volume delivery. Be sure to read this entire
manual before installation and start-up.
2.2 Inspection and Setup
The unit was leak-tested, pressure-tested, evacuated,
charged and run-tested prior to shipment. Immediately
upon receipt of the unit, check the electrical supply and/
or fuel characteristics of the unit and verify that they
match the electrical supply and/or fuel available. Verify
that the specifications on the unit rating plate match
your order. Check the unit for any damage that may
have occurred during shipment. If any damage is found,
file a claim with the transporting agency. Do not refuse
shipment. Check the installation location to ensure proper
clearances. See Page 4, Section 3.
Any small options which do not come attached to the unit
(i.e. sensors) will be found inside the unit control enclosure.
If the unit must be temporarily stored (i.e. job site is not
ready for installation of the unit), the unit should be set
on 4" x 4" (10 cm x 10 cm) pieces of timber on the ground
in a protected area. The unit should be covered to be
protected from the environment.
WARNING
This unit contains HFC-(R410A), an azeotropic
mixture of R-32 (Difluoromethane) and R-125
(Pentafluoroethane). DO NOT VENT HFC-(R410A) to
the atmosphere. The U. S. Clean Air Act requires the
recovery of any residual refrigerant. Do not use R-22
service equipment or components on R410A systems.
NOTICE
California Proposition 65
In accordance with California Proposition 65
requirements, a warning label must be placed in a
highly visible location on the outside of the equipment
(i.e., near equipment’s serial plate). See label
placement drawings on Figure 1 for label location.
Avoid placing label on areas with extreme heat, cold,
corrosive chemicals or other elements. To order
additional labels, please contact Addison, or your
Addison independent distributor.
PR Series Installation, Operation, and Maintenance Manual
