Sunline™ 2000 series convertible package rooftop models have two independent 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.
Technical Guide
SINGLE PACKAGE
GAS / ELECTRIC UNITS AND
SINGLE PACKAGE AIR CONDITIONERS
D2CE / D2CG 300 CONSTANT VOLUME
25 NOMINAL TONS
8.5 EER
SUNLINE 2000 ™
Cooling only, cooling with gas heat and cooling with electric
heat models are available with a wide variety of factorymounted 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 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.
FOR DISTRIBUTION USE ONLY - NOT TO BE USEDAT POINT OF RETAIL SALE
036-21359-001-B-0302
All supply air blowers are equipped with a belt drive
that can be adjusted to meet the exact requirements of
the job. A high speed drive accessory is available for
applications with a higher CFM and/or static pressure
requirement.
All compressors include 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 75 VA transformers, two 24-volt circuit breakers
and a relay board with two compressor lockout circuits,
a terminal strip for thermostat wiring, plus an additional
set of pin connectors to simplify the interface of additional field controls.
All 208/230 and 460-volt models are ETL approved. All
208/230 and 575-volt models are CGA approved.
All models include a 1-year limited warranty on the
complete unit. Compressors and electric heater elements carry an additional 4-year warranty. Aluminized
steel tubular heat exchangers carry an additional 9year 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.
FACTORY-INSTALLED OPTIONS
ECONOMIZERS
Interlocked outdoor and return air dampers are positioned by a fully modulating, spring return damper actuator capable of introducing up to 100% outdoor air with
nominal 1% leakage type dampers. As the outdoor air
intake dampers open, the return air dampers close.
The changeover from compressor to economizer cooling is determined by one or two solid state enthalpy
controls.
On single enthalpy, an outdoor air sensor determines
when the outdoor air is cool and dry enough to provide
“free” cooling. On differential enthalpy, one sensor
monitors the outdoor air while a second sensor monitors the return air. Whenever the outdoor air is cooler
and drier than the return air, the unit will switch to economizer operation. For either option, the first compressor stage can provide additional cooling during
economizer operation if the room thermostat calls for
second stage.
The dampers and controls are installed and wired at
the factory. Only the accessory rain hood needs to be
assembled and installed in the field.
These economizer options can be used on all duct configurations.
POWER EXHAUST
Both the single and differential economizer options are
available with power exhaust. Whenever the outdoor
air intake dampers are opened for free cooling, the
exhaust fan will be energized to prevent the conditioned space from being over-pressurized during economizer operation.
The exhaust fan, motor and controls are installed and
wired at the factory. Only the back-draft damper
assembly needs to be field installed and the accessory
rain hoods need to be assembled and installed in the
field.
The power exhaust option can only be used on bottom
duct configurations.
MOTORIZED OUTDOOR AIR INTAKE DAMPER
Interlocked outdoor and return air dampers are controlled by a 2-position, spring return damper actuator.
The outdoor damper will open to some pre-set position
whenever the supply air blower is operating and will
drive fully closed when the blower shuts down.
The damper and controls are installed and wired at the
factory. Only the accessory rain hood needs to be
assembled in the field.
This damper option can be used on all duct configura-
2Unitary Products Group
tions.
036-21359-001-B-0302
FIELD-INSTALLED ACCESSORIES
SINGLE INPUT ELECTRONIC ENTHALPY
ECONOMIZERS
ANTI-RECYCLE TIMERS
Two solid state timers prevent the compressors from
short-cycling. Once a compressor is de-energized, it
will remain de-energized for approximately five min-
Includes a slide-in/plug-in damper assembly with fully
utes.
modulating spring-return monitor actuator capable of
introducing up to 100% outdoor air with nominal 1%
leakage type dampers.
The enthalpy system contains one sensor that
monitors the outdoor air and determines when the air is
HIGH ALTITUDE NATURAL GAS
Burner orifices and pilot orifices are provided for proper
furnace operation at altitudes up to 6,000 feet.
PROPANE
cool enough and dry enough to provide “free” cooling.
Burner orifices, pilot orifices and gas valve parts are
The rainhood is painted to match the basic unit and
provided to convert a natural gas furnace to propane.
must be field-assembled before installing.
Power exhaust is not available as a field installed
option.
DUAL INPUT ELECTRONIC ENTHALPY
ECONOMIZERS
Includes a slide-in / plug-in damper assembly with fully
modulating spring-return monitor actuator capable of
introducing up to 100% outdoor air with nominal 1%
leakage type dampers.
This enthalpy system contains one sensor that monitors the outdoor air and one sensor that monitors the
return air. The logic module compares these two values and modulates the dampers providing the maximum efficiency of economizer system.
The rainhood is painted to match the basic unit and
must be field-assembled before installing.
Power exhaust is not available asa field installed
option.
MOTORIZED OUTDOOR AIR INTAKE DAMPER
Includes a slide-in/plug-in damper assembly with a
2-position, spring return motor actuator which opens to
some pre-set position whenever the supply air blower
is operating and will drive fully closed when the blower
unit shuts down.
The rain hood is painted to match the basic unit and
must be field assembled before installing.
Power exhaust is not available as a field installed
option.
ROOF CURBS
Fourteen inch high roof curbs provide a water-tight seal
between the unit and the finished roof. These full
HIGH ALTITUDE PROPANE
Burner orifices and pilot orifices are provided for proper
furnace operation at altitudes up to 6,000 feet. This
accessory supplements the basic propane conversion
kit.
SIDE DUCT FLANGES
One inch flanges replace the supply and return air panels on the rear of the unit to accommodate horizontal
duct connections. These flanges can also be used individually for bottom supply/horizontal return or horizontal supply/bottom return. They cannot be used on units
with power exhaust.
BAROMETRIC RELIEF DAMPER
This damper accessory can be used to relieve internal
air pressure on units with an economizer but no power
exhaust. This accessory includes a rain hood, a bird
screen and a fully assembled damper. With bottom
duct connections, the damper should be mounted over
the opening in the return air panel. With horizontal
ductwork, the accessory should be mounted on the
return air duct.
ECONOMIZER / POWER EXHAUST RAIN HOODS
A rain hood accessory must be used on units with an
economizer, a motorized damper, or a combined economizer with power exhaust option. These accessories
include all the hood panels, the necessary components
and hardware for field assembly.
HIGH SPEED DRIVE
A smaller blower pulley and a shorter belt increase the
speed of the supply air blower for applications with a
higher CFM and/or static pressure requirement.
perimeter curbs meet the requirements of the National
Roofing Contractors Association (NRCA) and are
shipped knocked-down for field assembly. They're
designed to fit inside the base rails of the unit and
include both a wood nailing strip and duct hanger supports.
Unitary Products Group3
LOW AMBIENT CONTROLS TO 0°F
An autotransformer and a thermostat maintain stable
system operation by reducing the speed of the condenser fan motor at low outdoor temperatures. The kit
036-21359-001-B-0302
O
also includes a 1-phase motor to replace the unit's
standard 3-phase condenser fan motor. Standard units
can operate down to 45°F.
COIL GUARD KIT
LO NG LASTING
POW DER PAIN T FINISH
ECONOMIZER HOOD
2" DISPOSA BLE
FILTER S
UTDOOR AIR OPENING
FOR SLIDE-IN /PLUG-IN
INTERNAL ECONOM IZER (OPTION)
SIDE AN D B O TTO M
SUPPLY & RETUR N AIR
D U C T O P E N IN G S ( S ID E X S ID E )
ELEC TR IC H EA TER LOC A TIO N
(O P T IO N A L E L E C T R IC /E L E C T R IC U N IT S )
20 G AU G E ALUM IN IZED STEEL
TUBULAR HEAT EXCHANGERS
NPT
I
1" N P T I
CONDENSATE DRAIN
FULL PER IM ETER 14 G UAG E BASE
R A IL S W IT H L IF T IN G H O L E S
Provides coil guard and fastners.
HIGH EFFICIENCY SCROLL COM PRESSORS
COPPER TUBE/ALUM INUM FIN
BELT-DR IVE
BLOW ER MOTOR
CONDENSER COILS
HOLE FOR BOTTOM
GAS SUPPLY ENTRY
POW ER VENTOR M O TO R
W ITH POST PURGE CYCLE
LOW VO LTAGE RELAY BOAR D
A N D T E R M IA N L S T R IP
ELECTRIC AL D ISCO N NECT
M O U N T IN G L O C A T IO N
(F ie ld in s t a lle d )
KNOCKOUT FOR
S ID E C O N T R O L W IR IN G E N T R Y
KNOCKOUT FOR
S ID E P O W E R W IR IN G E N T R Y S ID E
T E R M IN A L B L O C K
(F or S ingle P oint P ow er Supp ly
w ith E le c tric H e a t)
ELECTRIC/ELECTRIC UNITS
Outside the scope of ARI Standard 340/360.
EER=Energy Efficiency Rating at full load-the cooling capacity in Btu’s per hour (Btuh) divided by the power input in watts, expressed in Btuh per
watt (Btuh/watt).
IPLV - Integrated part load value.
Note: All gas units are two-stage heating. First stage is 50% of total.
All models are 80% Steady State Efficiency (S.S.E.).
Sound Power (db 10-
12
Watts)
@10Ft.
*
30010,000 1.30 1,160 12.5 108 1089891938681769865
*.
At a distance of 10 ft.from the blower.
NOTE: These values have been derived using a model of sound propagation,
measuring the indoor ambient sound levels ten feet from the source. The dBA
values provided are for reference only. Calculation of dBA values cover matters
of system design and application. This constitutes an exception to any specifi-
cation or guarantee requiring a dBA value or sound data in any other form than
sound power level ratings.
1These ca paci ties are gross rat ings. For net ca pac ity, de duct the heat of the sup ply air blower mo tor, MBH = 3.415 x KW. Ref er to the ap pro pri ate Blower
Per form ance Ta ble for the KW of the sup ply air blower mo tor.
2These rat ings in clude the con denser fan mo tors (To tal 2.3 KW) and the com pres sor mo tors but not the sup ply air blower mo tor.
- BOT TOM DUCT CON NEC TIONS (COOL ING AP PLI CA TIONS)
7500 CFM8750 CFM10000 CFM11250 CF
STANDARD DRIVE:
ACCESSORY DRIVE:
Blower performance is based on cooling only unit, with fixed outdoor air, 2" T/A filters and a dry evaporator coil.
Refer to page 7 for additional static resistances.
ESP - External Static Pressure available for the supply and return air duct system. All internal unit resistances have been deducted from the total static pressure of the
blower.
* FACTORY SETTING
- 25 TON (DCE/DCG300)
- BOT TOM DUCT CON NEC TIONS (COOL ING AP PLI CA TIONS)
7500 CFM8750 CFM10000 CFM11250 CFM12500 CFM
STANDARD DRIVE:
ACCESSORY DRIVE:
Blower performance is based on cooling only unit, with fixed outdoor air, 2" T/A filters and a dry evaporator coil.
Refer to page 7 for additional static resistances.
ESP - External Static Pressure available for the supply and return air duct system. All internal unit resistances have been deducted from the total static pressure of the
blower.
* FACTORY SETTING
CEN TRIFU GAL BLOWER (Dia. x Wd. in.)18 x 15
FAN MO TOR HP15
ROWS DEEP4
FINS PER INCH13.5
FACE AREA (Sq. Ft.)25.0
PRO PEL LER DIA. (in.) (Each)30
FAN MO TOR HP (Each)1
NOM. CFM TO TAL (Each)7200
ROWS DEEP3
FINS PER INCH15
FACE AREA (Sq. Ft.)43.3
12.5 TON, SCROLL, HER METIC,
TAN DEM (2 STAGE, 50% ea.)
QUAN TITY PER UNIT (16" X 20" X 2")2
QUAN TITY PER UNIT (16" X 25" X 2")4
QUAN TITY PER UNIT (14" X 20" X 2")3
TO TAL FACE AREA (sq. ft.)21.4
RE FRIG ER ANT
22 (lbs./oz.)
DCE/DCG/DCV
300
SYS TEM NO. 120/8
SYS TEM NO. 220/0
OP ER AT ING WEIGHTS
MODEL SIZE (MBH)300
DCE (Cool ing only)2730
DCV (Cool ing only)2795
Ba sic Unit
DCG (Gas / Elec tric)
DCV (Gas / Elec tric)
Econo mizer160
Econo mizer with
Power Ex haust
Op tions Mo tor ized Damper150
Elec tric Heater
2
(Elec/Elec only)
Roof Curb185
Ba ro met ric Damper45
Ac ces so -
Econo mizer/Mo tor ized Damper
Rain Hood
ries
Econo mizer/Power Ex haust Rain
Hood
Wood Skid220
N2402930
N3202970
N2402995
N3203035
245
18 KW25
36 KW30
54 KW35
72 KW40
55
90
Unitary Products Group7
036-21359-001-B-0302
A
t
BLOWER MO TOR AND DRIVE DATA
1
MODEL
SIZE
25 TON
1All mo tors have a nomi nal speed of 1800 RPM, a 1.15 serv ice fac tor and a solid base. They can op er ate to the limit of their serv ice fac tor be cause they are lo cated in the mov ing air, up stream
of any heat ing de vice.
BLOWER
DRIVE
RANGE
(RPM)
Stan-
975/1165
dard
High
Speed
1140/13651B5V949.79.5 1-7/16 5VX840 84.01
Ac cess
MO TOR
HP FRAME
15 254T91
AD JUST ABLE MO TOR PUL LEYFIXED BLOWER PUL LEY
OUT-
EFF.
(%)
DESIG-
NATION
1LVP58B70
A
SIDE
DIA.
(IN.)
7.5
PITCH
DIA.
(IN.)
6.2-
7.4
BORE
(IN.)
1 5/8
OUT SIDE
DESIG NATION
1B5V11011.311.1 1-7/16 5VX860 86.01
DIA.
(IN.)
PITCH
DIA.
(IN.)
BORE
(IN.)
DESIG-
NATION
BELT
(NOTCHED)
PITCH
LENGTH
(IN.)
QTY.
STATIC RE SIS TANCES*
DESCRIPTION
DEDUCTIONS: (SUBTRACT VALUES BELOW FROM UNIT'S AVAILABLE ESP)
ALLOWANCE FOR WET COIL:0.100.100.100.100.10
ECONOMIZER (RETURN DUCT): 0.060.090.110.140.18
18kW ELECTRIC HEAT:0.310.430.560.710.87
36kW ELECTRIC HEAT:0.380.520.680.871.07
54kW ELECTRIC HEAT:0.620.841.101.391.72
72kW ELECTRIC HEAT:0.680.931.211.541.90
ADDITIONS: (ADD VALUES BELOW TO UNIT'S AVAILABLE ESP)