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530.26-N1YI
TABLE 5 - STATIC RESISTANCES
DESCRIPTION
Economizer/Motorized Damper
5 - 15 KW
1
Electric Heaters
20 - 30 KW
1
Bottom Duct Connections
2
Cooling Only
DESCRIPTION
Economizer/Motorized Damper
5 - 15 KW
1
Electric Heaters
20 - 30 KW
1
Bottom Duct Connections
2
Cooling Only
1
Deduct these resistance values from the available external static pressure shown in the Blower Performance Table.
2
Add these resistance values to the available static resistance in the Blower Performance Table.
3
The pressure thru the economizer is greater for 100% outdoor air than for 100% return air. If the resistance of the return air duct system is less than 62 Pa (0.25 IWG), the unit will deliver less
airflow during full economizer operation.
TABLE 6 - MOTOR AND DRIVE DATA - Belt-Drive Blower
BLOWER
MODEL
RANGE
HP
(RPM)
⁄
1
DCE 060 850 - 1180
1
2
⁄
1
DCE 076 900 - 1200
1
2
*
All motors have solid bases and are inherently protected. These motors can be selected to operate into their service factor because they are located in the moving air, upstream of any
heating device.
TABLE 7 - ELECTRICAL DATA (BASIC UNIT)
MODEL
POWER
DCE
SUPPLY
036
380/415-3+N-50
048
380/415-3+N-50
060
380/415-3+N-50
076
380/415-3+N-50
1
Utilization Range "A" in accordance with ARI Standard 110.
2
Dual element, time delay type.
3
Based on 60°C copper conductors.
COOLING SYSTEM
The cooling section is a complete factory package utilizing an
air-cooled condenser. The system is factory-charged with
Refrigerant-22. The compressor is hermetically sealed and
internally sprung.
The compressors have inherent (internal) protection. If there is
an abnormal temperature rise in the compressor, the protector
opens to shut down the compressor.
PRELIMINARY OPERATION COOLING
After the installation has been completed, the crankcase heater
of the compressor must be energized for at least four hours
before starting the unit. After this initial warm-up, the
12
EXTERNAL STATIC PRESSURE DROP
0.47
0.57
1, 3
17.4
20.0
10.0
12.4
15.0
17.4
15.0
17.4
20.0
24.8
1000
1200
1, 3
0.07
0.08
0.04
0.05
0.06
0.07
0.06
0.07
0.08
0.10
MOTOR*
RPM FRAME
SERVICE
PITCH
SIZE
FACTOR
DIA.
mm
1450
56
1.15
69 - 97 2.8 - 3.8
1450
56
1.15
86 - 112 3.4 - 4.4
VOLTAGE
COMPRESSOR
1
LIMITATIONS
MIN.
MAX.
FLA
342
457
7.1
342
457
9.6
342
457
10.3
342
457
14.1
OPERATION
RESISTANCE, PA
3
M
0.66
0.75
0.85
0.94
22.3
27.3
32.2
37.2
15.0
17.4
20.0
24.8
20.0
22.3
27.3
32.2
20.0
22.3
24.8
27.3
29.8
34.7
39.7
44.6
RESISTANCE, IWG
CFM
1400
1600
1800
2000
0.09
0.11
0.13
0.15
0.06
0.07
0.08
0.10
0.08
0.09
0.11
0.13
0.08
0.09
0.10
0.11
0.12
0.14
0.16
0.18
ADJUSTABLE
MOTOR PULLEY
BORE
in.
mm
in.
mm
⁄
7
22
127
8
⁄
7
22
132
8
SUPPLY
COND.
AIR
FAN
BLOWER
MOTOR
MOTOR
LRA
FLA
FLA
64
1.8
2.0
73
1.8
4.0
74
1.8
2.6
128
1.8
2.6
compressor should be given three false starts (energized just
long enough to make a few revolutions) with a five minute delay
between each start before being put into full time service.
NOTE: Prior to each cooling season, the crankcase heater
must be energized at least 10 hours before the system
is put into operation.
COOLING SEQUENCE OF OPERATION
Single-Stage Cooling:
When the thermostat calls for "cooling", "R" is closed to "G" and
"Y1" (wiring schematic) which completes the low voltage
control circuit, immediately energizing the compressors,
condenser fan motor and blower motor simultaneously.
/S
1.03
1.13
1.23
42.2
49.6
57.0
29.8
34.7
39.7
37.2
42.2
49.6
29.8
34.7
39.7
49.6
57.0
64.5
2200
2400
2600
0.17
0.20
0.23
0.12
0.14
0.16
0.15
0.17
0.20
0.12
0.14
0.16
0.20
0.23
0.26
FIXED
BLOWER PULLEY
PITCH
BORE
PITCH LENGTH DESIG-
DIA.
in.
mm
in.
mm
5.0
25
1
947
5.2
25
1
973
TOTAL
MAX.
UNIT
FUSE
BREAKER
AMPACITY
SIZE
2
AMPS
AMPS
12.6
15
17.8
25
17.2
25
22.0
35
Unitary Products Group
1.32
1.42
64.5
74.4
47.1
54.6
57.0
64.5
47.1
54.6
71.9
79.4
2800
3000
0.26
0.30
0.19
0.22
0.23
0.26
0.19
0.22
0.29
0.32
BELT
NATION
in.
37.3
A36
38.3
A37
MAX.
MIN.
HACR
WIRE
SIZE,
SIZE
3
AWG
AMPS
15
14
25
10
25
10
35
8
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