23 blower motor and drive data, 24 static resistances, 25 power exhaust performance – York SUNLINE MAGNADRY WR 180 User Manual
Page 38
262292-YTG-B-0107
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Unitary Products Group
TABLE 23: BLOWER MOTOR AND DRIVE DATA
MODEL
SIZE
DRIVE
BLOWER
RANGE
(RPM)
MOTOR
1
ADJUSTABLE MOTOR PULLEY
FIXED BLOWER PULLEY
BELT
(NOTCHED)
HP FRAME
EFF.
(%)
DESIG-
NATION
OUTSIDE
DIA.
(IN.)
PITCH
DIA.
(IN.)
BORE
(IN.)
DESIG-
NATION
OUTSIDE
DIA.
(IN.)
PITCH
DIA.
(IN.)
BORE
(IN.)
DESIG-
NATION
PITCH
LENGTH
(IN.)
QTY.
15 TON
Standard
790/970
5
184 T
89.5
1VP62
5.95
4.9-5.9
2
1-1/8
BK105
10.25
9.9
1
BX81
82.8
1
High
Speed
Access
940/1130 7.5
213 T
91
1-3/8
BK90
8.75
8.4
20 TON
Low
Speed
Drive
910/1100
7.5
213 T
91
1VP68
6.55
5.5-6.5
1-3/8
BK100
9.75
9.4
1-3/16
BX81
82.8
1
Standard
10
215 T
91
High
Speed
Access
1000/1180 15
254 T
91
1VP71
7.1
5.4-6.6
1-5/8
25 TON
Low
Speed
Drive
900/1100
7.5
213 T
91
1VP65
6.0
4.8-6.0
1-3/8
1B5V94
9.7
9.5
1-3/16
BX78
79.8
1
Standard
15
254 T
91
1-5/8
1-7/16
High
Speed
Access
1000/1200
1VP71
7.1
5.5-6.5
BX81
82.8
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 pully below 1 turn open.
TABLE 24: STATIC RESISTANCES
1
DESCRIPTION
RESISTANCE, IWG
CFM
15 TON
20 TON
25 TON
4500
6000
7500
6000
8000
9000
7500
8000
9000
WET INDOOR COIL
0.1
0.1
0.1
0.1
0.1
0.2
0.1
0.1
0.2
ELECTRIC HEAT OPTIONS
18 KW
0.3
0.4
0.4
0.4
0.4
0.5
0.4
0.4
0.5
36 KW
0.3
0.4
0.5
0.4
0.5
0.5
0.5
0.5
0.5
54 KW
0.4
0.5
0.5
0.5
0.5
0.6
0.5
0.5
0.6
72 KW
0.4
0.5
0.5
0.5
0.5
0.6
0.5
0.5
0.6
ECONOMIZER OPTION
0.1
0.1
0.1
0.1
0.1
0.2
0.1
0.1
0.2
HORIZONTAL DUCT CONNECTIONS
2
0.1
0.2
0.3
0.2
0.3
0.5
0.3
0.3
0.5
1. Deduct these resistance values from the available external static pressures shown in the respective Blower Performance Table.
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 25: POWER EXHAUST PERFORMANCE
MOTOR
SPEED
1
STATIC RESISTANCE OF RETURN DUCTWORK, IWG
0.2
0.3
0.4
0.5
0.6
CFM
kW
CFM
kW
CFM
kW
CFM
kW
CFM
kW
HIGH
2
5250
0.83
4500
0.85
4200
0.88
3750
0.93
3000
0.99
MEDIUM
4900
0.77
3900
0.79
3500
0.82
2900
0.85
-
-
LOW
4400
0.72
3700
0.74
3000
0.78
-
-
-
-
1. Power exhaust motor is a 3/4 HP, PSC type with sleeve bearings, a 48 frame and inherent protection.
2. The factory setting.