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284816-BIM-B-0707
TABLE 19: STATIC RESISTANCES
DESCRIPTION
WET INDOOR COIL
ELECTRIC HEAT OPTIONS
ECONOMIZER OPTION
HORIZONTAL DUCT CONNECTIONS
1.
Deduct these resistance values from the available external static pressures shown in the respective Blower Performance Table (See Note 2 for
exception.)
2.
Since the resistance to air flow will be less for horizontal duct connections than for bottom duct connections, add these pressures to the ESP values
on the respective unit's blower performance table.
TABLE 20: POWER EXHAUST PERFORMANCE
MOTOR
0.2
SPEED
CFM
HIGH*
5250
MEDIUM
4900
LOW
4400
* Factory Setting
Power Exhaust motor is a 3/4 HP, PSC type with sleeve bearings, a 48 frame and inherent protection.
TABLE 21: BLOWER MOTOR AND DRIVE DATA
BLOWER
MODEL
DRIVE
RANGE
SIZE
(RPM)
HP FRAME
Standard 850/1065
15 TON
5
High
965/1190
Static
Standard 870/1025
17.5 &
7.5
High
20 TON
950/1120
Static
Standard 975/1165
25 TON
15
High
1140/1365
Static
1.
All motors have a nominal speed of 1800 RPM, a 1.15 service factor and a solid base. They can operate to the limit of their service factor because
they are located in the moving air, upstream of any heating device.
2.
Do NOT close this pulley below 1 turn open.
Unitary Products Group
1
15 TON
4500
6000
7200
0.1
0.1
0.1
18 KW
0.3
0.4
0.4
36 KW
0.3
0.4
0.5
54 KW
0.4
0.5
0.5
72 KW
0.4
0.5
0.5
0.1
0.1
0.1
2
0.1
0.2
0.3
STATIC RESISTANCE OF RETURN DUCTWORK, IWG
0.3
KW
CFM
KW
0.83
4500
0.85
0.77
3900
0.79
0.72
3700
0.74
1
ADJUSTABLE MOTOR PULLEY
MOTOR
OUTSIDE
EFF.
DESIG-
DIA.
(%)
NATION
(IN.)
184 T
83
1VP56
5.35
213 T
89
1VP68
6.75
254 T
91
1VP75X
7.5
RESISTANCE, IWG
CFM
17.5 TON
6000
7500
9000
6000
0.1
0.1
0.1
0.1
0.4
0.4
0.5
0.4
0.4
0.5
0.5
0.4
0.5
0.5
0.6
0.5
0.5
0.5
0.6
0.5
0.1
0.1
0.2
0.1
0.2
0.3
0.5
0.2
0.4
CFM
KW
CFM
4200
0.88
3750
3500
0.82
2900
3000
0.78
FIXED BLOWER PULLEY
PITCH
OUTSIDE
BORE
DESIG-
DIA.
DIA.
(IN.)
NATION
(IN.)
(IN.)
BK90
8.75
2
1-1/8
4.3-5.3
BK80
7.75
BK120
11.75
2
1-3/8
5.5-6.5
BK110
10.75
1B5V110
11.3
6.2-7.4
1-5/8
1B5V94
9.7
20 TON
25 TON
8000
9400
7500
10000 12500
0.1
0.1
0.1
0.1
0.4
0.5
0.4
0.5
0.5
0.5
0.5
0.5
0.5
0.6
0.5
0.6
0.5
0.6
0.5
0.6
0.1
0.2
0.1
0.2
0.3
0.5
0.3
0.5
0.5
0.6
KW
CFM
0.93
3000
0.85
-
-
-
-
BELT
(NOTCHED)
PITCH
PITCH
BORE
DESIG-
DIA.
LENGTH
(IN.)
NATION
(IN.)
8.4
1
BX81
7.4
1
BX78
11.4
1-3/16
BX83
10.4
1-3/16
BX81
11.1
1-7/16 5VX860
9.5
1-7/16 5VX840
0.1
0.6
0.6
0.7
0.7
0.3
0.6
KW
0.99
-
-
QTY.
(IN.)
82.8
1
79.8
1
84.8
1
82.8
1
86.0
1
84.0
1
41
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