York 300 warranty Blower Motor and Drive Data, Static RESISTANCES1, Power Exhaust Performance

036-21410-001-A-0502

TABLE 31: BLOWER MOTOR AND DRIVE DATA

MOTOR1

ADJUSTABLE MOTOR PULLEY

FIXED BLOWER PULLEY

BELT

BLOWER

(NOTCHED)

MODEL

DRIVE

RANGE

EFF.

DESIG-

OUTSIDE

PITCH

BORE

DESIG-

OUTSIDE

PITCH

BORE

DESIG-

PITCH

SIZE

(RPM)

HP

FRAME

(%)

NATION

DIA.

DIA.

(IN.)

NATION

DIA.

DIA.

(IN.)

NATION

LENGTH

QTY.

(IN.)

(IN.)

(IN.)

(IN.)

(IN.)

Standard

850/1065

BK90

8.75

8.4

1

BX81

82.8

1

15 TON

High

965/1190

5

184 T

83

1VP56

5.35

4.3-5.32

1-1/8

BK80

7.75

7.4

1

BX78

79.8

1

Speed

Access

Standard

870/1025

BK120

11.75

11.4

1-3/16

BX83

84.8

1

17.5 &

High

7.5

213 T

89

1VP68

6.75

5.5-6.52

1-3/8

20 TON

950/1120

BK110

10.75

10.4

1-3/16

BX81

82.8

1

Speed

Access

Standard

975/1165

1B5V110

11.3

11.1

1-7/16

5VX860

86.0

1

25 TON

High

1140/1365

15

254 T

91

1VP75X

7.5

6.2-7.42

1-5/8

1B5V94

9.7

9.5

1-7/16

5VX840

84.0

1

Speed

Access

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.

TABLE 32: STATIC RESISTANCES1

							RESISTANCE, IWG
DESCRIPTION								CFM
			15 TON			17.5 TON				20 TON			25 TON
		4500	6000	7200	6000		7500	9000	6000	8000	9400	7500	10000	12500
WET INDOOR COIL		0.1	0.1	0.1	0.1		0.1	0.1	0.1	0.1	0.1	0.11	0.11	0.11
	18 KW	0.1	0.1	0.1	0.1		0.1	0.1	0.1	0.1	0.1	0.31	0.56	0.87
ELECTRIC HEAT OPTIONS	36 KW	0.1	0.2	0.3	0.1		0.2	0.3	0.1	0.2	0.3	0.38	0.68	1.07
	54 KW	0.2	0.3	0.4	0.2		0.3	0.4	0.2	0.3	0.4	0.62	1.10	1.72
	72 KW	0.2	0.4	0.6	0.2		0.4	0.6	0.2	0.4	0.6	0.68	1.21	1.90
ECONOMIZER OPTION		0.1	0.1	0.1	0.1		0.1	0.1	0.1	0.1	0.1	0.06	0.11	0.18
HORIZONTAL DUCT CONNECTIONS2		0.1	0.2	0.3	0.2		0.3	0.5	0.2	0.3	0.5	0.36	0.32	0.46

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 33: POWER EXHAUST PERFORMANCE

MOTOR				STATIC RESISTANCE OF RETURN DUCTWORK, IWG
SPEED1		0.2		0.3			0.4			0.5			0.6
	CFM		kW	CFM	kW	CFM		kW	CFM		kW	CFM		kW
HIGH2	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.

40 Unitary Products Group