York WW-15, Installation Manual

Page: 43 / 68

175244-BIM-A-0706
Unitary Products Group 43
* Factory Setting
Power Exhaust motor is a 3/4 HP, PSC type with sleeve bearings, a 48 frame and inherent protection.
TABLE 27: STATIC RESISTANCES
1
DESCRIPTION
RESISTANCE, IWG
CFM
15 TON 20 TON 25 TON
4500 6000 7500 6000 8000 9000 7500 8000 9300
WET INDOOR COIL 0.1 0.1 0.1 0.1 0.1 0.2 0.1 0.1 0.2
RECLAIM COIL OPTIONS
2 ROW 0.1 0.2 0.2 0.2 0.3 0.3 0.2 0.3 0.3
3 ROW 0.2 0.3 0.4 0.3 0.4 0.5 0.4 0.4 0.5
ELECTRIC HEAT OPTIONS
18 KW 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1
36 KW 0.1 0.2 0.3 0.2 0.3 0.3 0.3 0.3 0.3
54 KW 0.2 0.3 0.4 0.3 0.4 0.4 0.4 0.4 0.4
72 KW 0.2 0.4 0.6 0.4 0.5 0.6 0.6 0.6 0.6
ECONOMIZER OPTION 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1
1.
Deduct these resistance values from the available external static pressures shown in the respective Blower Performance Table.
TABLE 28: POWER EXHAUST PERFORMANCE
MOTOR
SPEED
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* 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 - - - -
TABLE 29: 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 795/970 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
935/1140 7.5 213 T 91 1VP62 5.95
4.9-5.9
2
1-3/8 BK90 8.75 8.4 1 BX81 82.8 1
20 TON
Low 850/1010 7.5 213T 91 1VP68 6.55 5.5-6.5
2
1-3/8 BK110 10.75 10.4 1-3/16 BX81 82.8 1
Standard 850/1010 10 215T 91 1VP68 6.55 5.5-6.5
2
1-3/8 BK110 10.75 10.4 1-3/16 BX81 82.8 1
High Speed
Access
930/1110 10 215 T 91 1VP68 6.55 5.5-6.5
2
1-3/8 BK100 9.75 9.4 1-3/16 BX81 82.8 1
25 TON
Low 915/1100 7.5 213T 91 1VP65 6.5 4.8-6.0 1-3/8 1B5V94 9.7 9.5 1-3/16 BX78 79.8 1
Standard 915/1100 15 254T 91 1VP65 6.5 4.8-6.0 1-5/8 1B5V94 9.7 9.5 1-7/16 BX78 79.8 1
High Speed
Access
1015/1200 15 254 T 91 1VP71 7.1 5.4-6.6 1-5/8 1B5V94 9.7 9.5 1-7/16 BX81 82.8 1
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.