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PKGP-PRC004-EN
Mechanical
Specifications
Options/Accessories
Electric Heaters — Field-installed electric
heat modules shall be available for
installation within basic unit. Electric
heater elements shall be constructed of
heavy-duty nickel chromium elements
internally delta connected for 200 volt,
wye connected for 380-415 volt. Staging
shall be achieved through the unit
control processor (UCP). Each heater
package shall have automatically reset
high limit control operating through
heating element contactors. All heaters
shall be individually fused from the
factory, where required. Power
assemblies shall provide single-point
connection.
Roof Curb — The roof curb shall be
designed to mate with the downflow
supply and return openings and provide
support and a water tight installation
when installed properly. The roof curb
design shall allow field-fabricated
rectangular supply/return ductwork to be
connected directly to the curb. Curb shall
be shipped knocked down for field
assembly and shall include wood nailer
strips.
Economizer — shall be either field or
factory-installed and shall be available
with or without barometric relief. The
assembly includes fully modulating 0-
100 percent motor and dampers, relief,
minimum position setting, preset
linkage, wiring harness with plug, spring
return actuator and fixed dry bulb. The
barometric relief damper provide a
pressure operated damper that shall be
gravity closing and shall prohibit
entrance of outside air during the
equipment “ off” cycle. Solid state
enthalpy and differential enthalpy
control shall be factory or field-installed
options. The factory-installed
economizer arrives in the shipping
position and shall be moved to the
operating position by the installing
contractor.
Remote Potentiometer — The minimum
position setting of the economizer shall
be adjusted with this field-installed
accessory.
Reference or Comparative Enthalpy —
Reference or Comparative Enthalpy
option shall be available when a factory-
installed economizer is ordered.
Clogged Filter/Fan Failure Switch —
A factory or field-installed dedicated
differential pressure switch is available
to achieve active fan failure indication
and/or clogged filter indication. These
indications will be registered with either
a zone sensor with status indication
lights or an Integrated Comfort
™
system.
Manual Outside Air Damper — Factory
or field-installed rain hood and screen
shall provide up to 50 pecent outside air.
Motorized Outside Air Dampers —
Factory or field-installed manually set
outdoor air dampers shall provide up to
50 percent outside air. Once set, outdoor
air dampers shall open to set position
when indoor fan starts. The damper
shall close to the full closed position
when indoor fan shuts down.
Oversized Motors — Factory or field-
installed direct drive oversized motors
shall be available for high static
applications.
High Pressure Cutout — Standard in all
units.
Hinged Access Doors — Sheet metal
hinges are available factory-installed on
the Filter/Evaporator, Supply Fan/Heat,
and the Compressor/Control Access
Doors.
Discharge Air Sensing Kit — This factory
or field-installed option provides true
discharge air sensing in heating models.
This sensor is a status indicator readable
through Tracer
™
or Tracker
™
.
Black Epoxy Coated Condenser Coil —
The coil provides corrosion protection to
condenser coils for seacoast application.
The protection is a factory applied
thermoset vinyl coating, bonded to
normal aluminum fin stock. The uniform
thickness of the bonded vinyl layer
exhibits excellent corrosion protection in
salt spray tests.