DESCRIPTION
These 25 ton models are manufactured under ISO 9002
Quality System Certification and are the latest addition to York’s
Sunline 2000 series convertible rooftop product line. All
models have three refrigerant circuits for efficient part load
operation. Although the units are primarily designed for curb
mounting on a roof, they can also be slab-mounted at ground
level or set on steel beams above a finished roof.
Cooling only, cooling with gas heat and cooling with electric
heat models are available with wide variety of factory-mounted
options and field-installed accessories to make them suitable
for almost every application.
All units are self-contained and assembled on full perimeter
base rails with holes in the four corners for overhead rigging.
Every unit is completely piped, wired, charged and tested at
the factory to simplify the field installation and to provide years
of dependable operation. Powder paint cabinets provide an
exceptionally durable finish with the 750 hour salt spray
process per ASTM-B117 test standard.
All models (including those with an economizer) are suitable
for either bottom or horizontal duct connections. Models with
power exhaust are suitable for bottom duct connections only.
For bottom duct, you remove the sheet metal panels from the
supply and return air openings through the base of the unit. For
horizontal duct, you replace the supply and return air panels
on the rear of the unit with a side duct flange accessory.
All models are available with five different outdoor air damper options:
•
Single enthalpy economizer
•
Differential (dual) enthalpy economizer
•
Single enthalpy economizer with power exhaust
•
Differential (dual) enthalpy economizer with power exhaust
•
Motorized outdoor air damper
A fixed outdoor air intake assembly is shipped in the return air
compartment of all units ordered without an economizer or
motorized outdoor air damper option. The assembly includes a
rain hood with a damper that can be set for 10, 15 or 25% outdoor
air. With bottom duct connections, the intake damper assembly
should be mounted over the opening in the return air panel.
With horizontal ductwork, it should be mounted on the return
air duct.
All supply air blowers are equipped with a belt drive that can
be adjusted to meet the exact requirements of the job
All compressors include crankcase heat and internal pressure
relief. Every refrigerant circuit includes an expansion valve, a
liquid line filter-drier, a discharge line high pressure switch and
a suction line with a freezestat and low pressure/loss of charge
switch. The unit control circuit includes two 24-volt circuit
breakers and a relay board with three compressor lockout
circuits, a terminal strip for thermostat wiring, plus an additional
set of pin connectors to simplify the interface of additional field
controls.
Compressors and electric heater elements carry an additional
4-year warranty. Aluminized steel tubular heat exchangers
carry an additional 9-year warranty.
All gas heat models are built with two heating sections for two
equal stages of capacity control. Each section includes a
durable heat exchanger with aluminized steel tubes, a
redundant gas valve, spark ignition, power venting, an ignition
module for 100% shut-off and all of the safety controls required
to meet the latest ANSI standards.
The gas supply piping can be routed into the heating
compartment through a hole in the base pan of the unit or
through a knockout in the piping panel on the front of the unit.
All electric heat models are wired for a single power source and
include a bank of nickel chromium elements mounted at the
discharge of the supply air blower to provide a high velocity and
uniform distribution of air across the heating elements. Every
element is fully protected against excessive current and
temperature by fuses and two thermal limit switches.
The power supply wiring can be routed into the control box
through a threaded pipe connection in the base pan of the unit
or through a knockout in the wiring panel on the front of the unit.
All internal factory wiring is color coded and numbered for ease
in servicing and troubleshooting.
530.26-TG4YI (496)
SINGLE PACKAGE
GAS / ELECTRIC UNITS AND
SINGLE PACKAGE AIR CONDITIONERS
D2CE / D2CG 300 CONSTANT VOLUME
25 NOMINAL TONS
(WORLD 50 HZ)
SUNLINE 2000
®
DCG
Unit Shown
