EXTERNAL STATIC PRESSURE DROP
DESCRIPTION
RESISTANCE, IWG
CFM
1000
1200
1400
1600
1800
2000
2200
2400
2600
2800
3000
Economizer
1, 3
0.07
0.08
0.09
0.11
0.13
0.15
0.17
0.20
0.23
0.26
0.30
Electric Heaters
1
5 - 15 KW
0.04
0.05
0.06
0.07
0.08
0.10
0.12
0.14
0.16
0.19
0.22
20 - 30 KW
0.06
0.07
0.08
0.09
0.11
0.13
0.15
0.17
0.20
0.23
0.26
Bottom Duct Connections
1
0.06
0.07
0.08
0.09
0.10
0.11
0.12
0.14
0.16
0.19
0.22
Cooling Only
2
0.08
0.10
0.12
0.14
0.16
0.18
0.20
0.23
0.26
0.29
0.32
1
Deduct these resistance values from the available external static pressure shown in the respective Blower Performance Table.
2
Add these resistance values to the available static resistance in the respective 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 0.25 IWG, the unit will deliver less CFM
during full economizer operation.
TABLE 6 - STATIC RESISTANCES
UNIT
SIZE
BLOWER
RANGE
(RPM)
MOTOR*
ADJUSTABLE
MOTOR PULLEY
FIXED
BLOWER PULLEY
BELT
HP
RPM
FRAME
SIZE
SERVICE
FACTOR
PITCH
DIA.
(in.)
BORE
(in.)
PITCH
DIA.
(in.)
BORE
(in.)
PITCH
LENGTH
(in.)
DESIG-
NATION
DCE036
780 - 1090
1-1/2
1725
56
1.15
2.4 - 3.4
7/8
5.7
1
37.3
A36
DCE048
790 - 1120
1-1/2
1725
56
1.15
2.4 - 3.4
7/8
5.7
1
37.3
A36
DCE060
850 - 1220
1-1/2
1725
56
1.15
2.4 - 3.4
7/8
5.2
1
37.3
A36
DCE072
900 - 1250
1-1/2
1725
56
1.15
2.8 - 3.8
7/8
5.2
1
37.3
A36
*
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
TABLE 7 - MOTOR AND DRIVE DATA - Belt-Drive Blower
UNIT
SIZE
POWER
SUPPLY
VOLTAGE
LIMITATIONS
(SEE NOTE 1)
SCROLL
COMPRESSOR
COND.
FAN
MOTOR,
FLA
SUPPLY
AIR
BLOWER
MOTOR,
FLA
MINIMUM
CIRCUIT
AMPACITY
MAX.
FUSE
SIZE,
(SEE NOTE 2)
AMPS
MAX.
HACR
BREAKER
SIZE,
AMPS
MIN.
MAX.
RLA
LRA
036
208/230-1-60
208/230-3-60
460-3-60
575-3-60
187
187
414
518
253
253
504
630
18.0
11.4
6.2
5.0
105.0
90.0
45.0
36.0
1.3
1.3
0.8
0.8
4.4
4.4
2.2
2.2
28.2
20.0
10.8
9.3
45
30
15
15
45
30
15
-
048
208/230-1-60
208/230-3-60
460-3-60
575-3-60
187
187
414
518
253
253
504
630
24.4
14.1
7.1
5.6
140.0
105.0
55.0
44.0
1.3
1.3
0.8
0.8
5.0
5.0
2.2
2.2
36.8
23.9
11.9
10.1
60
35
15
15
60
35
15
-
060
208/230-1-60
208/230-3-60
460-3-60
575-3-60
187
187
414
518
253
253
504
630
28.9
16.0
8.0
6.4
165.0
125.0
67.0
50.0
1.3
1.3
0.8
0.8
6.6
6.6
3.3
3.3
44.0
27.9
14.1
12.1
70
40
20
15
70
40
20
-
072
208/230-3-60
460-3-60
575-3-60
187
414
518
253
504
630
20.3
10.2
8.2
146.0
73.0
58.4
1.3
0.8
0.8
6.8
3.6
3.6
33.5
17.2
14.7
50
25
20
50
25
-
NOTES:
1. Utilization Range “A” in accordance with ARI Standard 110. 2. Dual element, time delay type.
w/Direct-Drive Blower Motor
TABLE 8 - ELECTRICAL DATA (BASIC UNIT)
UNIT
SIZE
POWER
SUPPLY
VOLTAGE
LIMITATIONS
(SEE NOTE 1)
SCROLL
COMPRESSOR
COND.
FAN
MOTOR,
FLA
SUPPLY
AIR
BLOWER
MOTOR,
FLA
MINIMUM
CIRCUIT
AMPACITY
MAX.
FUSE
SIZE,
(SEE NOTE 2)
AMPS
MAX.
HACR
BREAKER
SIZE,
AMPS
MIN.
MAX.
RLA
LRA
036
208/230-1-60
208/230-3-60
460-3-60
575-3-60
187
187
414
518
253
253
504
630
18.0
11.4
6.2
5.0
105.0
90.0
45.0
36.0
1.3
1.3
0.8
0.8
5.3
5.3
3.1
3.1
29.1
20.9
11.7
10.2
45
30
15
15
45
35
15
-
048
208/230-1-60
208/230-3-60
460-3-60
575-3-60
187
187
414
518
253
253
504
630
24.4
14.1
7.1
5.6
140.0
105.0
55.0
44.0
1.3
1.3
0.8
0.8
8.6
5.2
2.6
2.0
40.4
24.1
12.3
9.9
60
35
15
15
60
35
15
-
060
208/230-1-60
208/230-3-60
460-3-60
575-3-60
187
187
414
518
253
253
504
630
28.9
16.0
8.0
6.4
165.0
125.0
67.0
50.0
1.3
1.3
0.8
0.8
8.6
6.0
3.0
2.4
46.0
27.3
13.8
11.2
70
40
20
15
70
40
20
-
072
208/230-3-60
460-3-60
575-3-60
187
414
518
253
504
630
20.3
10.2
8.2
146.0
73.0
58.4
1.3
0.8
0.8
7.3
3.7
2.8
34.0
17.3
13.9
50
25
20
50
25
-
NOTES:
1. Utilization Range “A” in accordance with ARI Standard 110. 2. Dual element, time delay type.
TABLE 9 - ELECTRICAL DATA (BASIC UNIT)
w/Belt-Drive Blower Motor
530.18-N7Y
Unitary Products Group
11
