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47PKG-PRC010-EN
Mechanical
Specifications
Time Delay Relay
A time delay relay shall provide a four
minute time delay prior to starting the
second compressor on 10 and 15-ton
units to help prevent power demand
surges.
Anti-Recycle Timer
An anti-recycle timer shall be provided to
protect the compressor from excessive
cycling. Compressors will lock out for five
minutes when either the thermostat
contacts open or there is a momentary
power outage.
Rubber-in-Shear Isolation
Rubber-in-shear isolation pads shall be
provided for installation under the base of
the unit for vibration isolation.
Spring Isolation
Spring vibration isolators shall be
provided for installation under the base of
the unit for vibration isolation.
Unit Mounted Thermostat
Unit mounted cooling only thermostat
with up to two stages of cooling can be
factory or field installed on the unit.
Remote Mounted Thermostat
A remote 0heat/2cool thermostat shall be
provided on 3, 5, and 7.5 ton units. A
remote 2heat/2cool manual or auto
thermostat shall be provided on 10 and
15-ton units.
Remote Programmable Thermostat
A remote programmable 1heat/2cool
thermostat shall be provided on 3, 5 and
7.5 ton units. A remote programmable
2heat/2cool thermostat shall be provided
on 10 and 15-ton units.
Remote Air-Cooled Condenser
CCRA/CIRA
Cabinet
The unit framework is formed of heavy
gauge welded steel. Exterior panels are
fabricated from 18-gauge galvanized
steel.
Refrigerant Circuits and Controls
The 3, 5, and 7.5-ton units shall have a
single refrigerant circuit and the 10 and
15-ton unit have dual refrigeration
circuits. All units are provided with an
integral subcooling circuit and factory
installed controls to run the unit fans. The
control panel includes fan motor
contactors, a terminal block connection
for compressor interlock, and a 115-volt
control power transformer.
Condenser Coil
A condenser coil with a slab-type
arrangement is provided. The coil is
constructed of seamless,
3
/
8
-in (9.5 mm)
O.D. copper tubes, expanded into
aluminum fins. Each circuit includes an
integral subcooler. The coil is leak-tested
under water at 425 psig.
Condenser Fan and Motor
Condenser fans are weatherproof with a
permanently lubricated motor and built-
in thermal overload protection. Fans are
direct drive type and are statically and
dynamically balanced at the factory. The
3 and 5-ton units have a single condenser
fan. The 7.5 and 10-ton units have two
condenser fans. The 15-ton unit has four
condenser fans.
Protective Coating Option Unit
The unit interior and exterior shall have a
four to six mil protective coating applied
with an air-dry process.
Condenser Coil
The condenser coil has a corrosion
protective coating consisting of a
conversion layer and a polyurethane top
layer applied to protect from harsh
environments.
Low Ambient Operation Option
The low ambient damper allows opera-
tion down to 0°F (-17.78°C) by utilizing
additional fan cycling and an external
damper assembly for head pressure
control. The low ambient damper
includes a 16-gauge damper assembly,
HCFC-22 operator, tubing and adapter
fittings, rubber grommet, and all neces-
sary mounting hardware and instruc-
tions for field installation.
Agency Listing
The unit has the US Underwriter’s
Laboratory agency listing and/or the
Canada CSA agency listing.