York DM 300 User Manual download pdf (Page 23)

262259-YTG-E-1008

Johnson Controls Unitary Products 23

TABLE 13: BLOWER MOTOR AND DRIVE DATA

MODEL

SIZE

DRIVE

BLOWER

RANGE

(RPM)

MOTOR

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 850/1065

5 184 T 83 1VP56 5.35 4.3-5.3

1-1/8

BK90 8.75 8.4 1 BX81 82.8 1

High

Static

965/1190 BK80 7.75 7.4 1 BX68 69.8 1

20 TON

Standard 870/1025

7.5 213 T 89 1VP68 6.75 5.5-6.5

1-3/8

BK120 11.75 11.4 1-3/16 BX83 84.8 1

High

Static

950/1120 BK110 10.75 10.4 1-3/16 BX81 82.8 1

25 TON

Standard 950/1120 10 215 T 89.5 1VP68 6.75 5.5-6.5

1-3/8 1B5V110 11.3 11.1 1-7/16 BX81 82.8 1

High

Static

1140/1365 15 254 T 91 1VP75X 7.5 6.2-7.4 1-5/8 1B5V94 9.7 9.5 1-7/16 5VX840 84.0 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.

TABLE 14: STATIC RESISTANCES

DESCRIPTION

RESISTANCE, IWG

CFM

15 TON 20 TON 25 TON

4500 6000 7200 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

ELECTRIC HEAT OPTIONS

18 KW 0.3 0.4 0.4 0.4 0.4 0.5 0.4 0.5 0.6

36 KW 0.3 0.4 0.5 0.4 0.5 0.5 0.5 0.5 0.6

54 KW 0.4 0.5 0.5 0.5 0.5 0.6 0.5 0.6 0.7

72 KW 0.4 0.5 0.5 0.5 0.5 0.6 0.5 0.6 0.7

ECONOMIZER OPTION 0.1 0.1 0.1 0.1 0.1 0.2 0.1 0.2 0.3

HORIZONTAL DUCT CONNECTIONS

0.1 0.2 0.3 0.2 0.3 0.5 0.3 0.5 0.6

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 15: 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 - - - -

1. Power exhaust motor is a 3/4 HP, PSC type with sleeve bearings, a 48 frame and inherent protection.

2. The factory setting.

1 2 ... 18 19 20 21 22 23 24 25 26 27 28 ... 39 40

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