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SUPPLY AIR BLOWER PERFORMANCE
-
DCG036, 048, 060, 072 with Direct-Drive
ECONOMIZERS:
Units equipped with a factory-installed economizer
option have dampers that are positioned by a spring return, fully
modulating damper actuator and are capable of introducing up to 100%
outdoor air. As the outdoor air intake dampers open, the return air
dampers close. The changeover from mechanical refrigeration to
economizer operation is determined by a single input electronic enthalpy
control or by a dual input electronic enthalpy control. Simultaneous scroll
compressor and economizer operation is also possible.
The single enthalpy system contains a sensor that monitors the outdoor
air which automatically operates the damper actuator allowing the
dampers to open or close.
The dual enthalpy system contains a second sensor that monitors both
the temperature and the humidity of the return air in addition to the
outdoor air sensor described for a single enthalpy system. The logic
module compares the inputs from both sensors and switches to
economizer operation whenever the outdoor air is cooler than the
return air for maximum efficiency of the economizer system.
The economizer is completely wired and installed at the factory. Only
the outdoor air hood, including its filters, need be assembled and
installed in the field.
BELT DRIVE BLOWERS:
Adjustable belt-drive blowers providing
maximum flexibility to handle many airflow requirements, are available
on all models.
SINGLE INPUT ELECTRONIC ENTHALPY ECONOMIZER -
Includes
a slide-in / plug-in damper assembly with fully modulating spring return
motor actuator capable of introducing up to 100% outdoor air, one
outdoor air electronic enthalpy sensor and a rain hood with filters. The
rain hood is painted to match the basic unit and must be
field-assembled before installation. Economizer dampers are 2% low
leakage type.
DUAL INPUT ELECTRONIC ENTHALPY ECONOMIZER -
Includes
the same damper system and rain hood with filters as described for a
single enthalpy economizer except this accessory contains two
enthalpy sensors. It uses a differential enthalpy control that compares
the outdoor air versus the return air. The logic module then optimizes
the economizer operation for additional savings over the single input
economizer.
MOTORIZED AIR DAMPER
- Includes a slid-in/plug-in damper
assembly with a rainhood and filters. The outdoor air dampers
open when the indoor fan motor is energized. The damper is
capable of providing 0% through 100% of outdoor return air
opening.
MANUAL OUTDOOR DAMPER
- Provides 0% through 35%
or 0% through 100% of return air opening (field adjustable).
Designed for duct mounted side or bottom supply/return
applications. Includes rain hood assembly and filter.
ELECTRIC HEATERS -
Include nickel chromium elements, a terminal
block, fuses (where required by UL), all the necessary connectors and
hardware. All heaters utilize single point power supply hookup.
Capacities from 5 KW thru 30 KW heating are available.
FUSE BLOCK KITS -
These kits have a fuse box with a fuse block and
fuses. They’re available for all 460-3-60 volt heaters and 208/230-3-60
volt heaters 7 KW and smaller.
OUTDOOR THERMOSTAT -
A 24-volt thermostat providing two stages
of control for units equipped with electric heat accessories.
ROOF CURB -
This 14" high full perimeter roof curb is shipped knocked
down for field assembly and contains duct supports that can easily be
shifted for the desired unit duct arrangement. No insulated deck is
required because the unit underside is insulated.
START ASSIST KIT -
Provides increased starting torque for single
phase units in areas with low voltage conditions. It contains a 12.5 OHM
PTCR temperature resistor with a support clip and hardware for
mounting.
LOW AMBIENT KIT -
A low ambient controller maintains stable system
operation by reducing the speed of the condenser fan motor when the
outdoor temperature is between 45 and 0
°
F.
ANTI-RECYCLE TIMER -
A timer to prevent the units scroll compressor
from short cycling. It assures a 5-minute off-time between compressor
cycles.
PROPANE CONVERSION KIT -
Converts a gas-fired heater from
natural gas to propane. It contains main burner orifices, a pilot orifice
and a regulator spring.
LOW NOx KIT (natural gas furnaces only) -
Contains five stainless
steel expanded metal sheets for mounting into the heat exchanger
tubes to meet the California low nitrous oxide emission requirements.
HIGH ALTITUDE CONVERSION (NATURAL AND PROPANE)
-
Provides orifices for proper furnace operation at altitudes up to 6000
feet. For propane applications, the propane conversion kit will also be
required.
GAS PIPING
- This kit contains 1/2" pipe nipples, fittings and gas cock
(including panel access gaskets) required for bottom gas supply
connection with external shut-off.
OUTDOOR COIL GUARD -
Consists of grille-type sections for
installation over the outdoor coil to protect it from damage.
WALL THERMOSTAT -
The units are designed to operate with 24-volt
electronic and electro-mechanical thermostats. All units can operate
with single stage heat / single stage cool thermostats - with or without
the economizer.
FIELD-INSTALLED ACCESSORIES
FACTORY-INSTALLED OPTIONS
MODEL
DCG
MOTOR
SPEED
Available External Static Pressure - IWG*
0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90 1.00
CFM Watts CFM Watts CFM Watts CFM Watts CFM Watts CFM Watts CFM Watts CFM Watts CFM Watts
036
HI
MED
LOW
-
1684
1487
-
800
710
-
1631
1464
-
780
690
1699
1582
1421
825
750
670
1650
1524
1367
785
720
650
1570
1410
1315
755
690
620
1430
1324
1246
725
650
605
1360
1260
1185
700
630
590
1280
1185
1110
680
610
570
1180
1100
1020
655
590
545
048
HI
MED
LOW
1996
1804
1681
960
838
760
1933
1765
1640
936
810
738
1868
1714
1604
910
785
715
1795
1650
1541
880
765
695
1722
1589
1490
845
735
670
1635
1508
1416
820
705
645
1544
1407
1337
790
675
620
1419
1306
1230
765
645
595
1300
1195
1120
740
625
575
060
HI
MED
LOW
2400
2290
2150
1155
1105
1020
2338
2214
2100
1125
1065
990
2274
2145
2029
1095
1030
950
2167
2071
1965
1045
990
910
2096
1990
1905
1010
950
880
1990
1911
1816
980
920
838
1887
1828
1724
945
885
800
1771
1724
1644
905
835
770
1629
1604
1531
855
798
710
072 HI 2461 1480 2402 1440 2361 1395 2260 1350 2178 1305 2101 1260 2000 1205 1914 1155 1830 1110
*
INCLUDES ALLOWANCES FOR A WET EVAPORATOR COIL, 1" FILTERS, AND THE HEAT EXCHANGERS. REFER TO THE STATIC RESISTANCES TABLE FOR RESISTANCE VALUES
ON APPLICATIONS OTHER THAN GAS / ELECTRIC UNITS WITH SIDE DUCT AIRFLOWS.
NOTE: FOR 208 VOLTS, MULTIPLY VALUES BY 0.95.
GAS HEAT @ 230/460/575 VOLTS - Side Duct Applications
530.18-TG1Y
10 Unitary Products Group