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036-21540-001-A-0503

Unitary Products Group

17

  

BLOWER SPEED ADJUSTMENT

The RPM of the supply air and condenser air blowers
will depend on the required CFM, and the static resis-
tance of both the supply/discharge and the return/
intake duct systems. With this information, the RPM for
the blowers can be determined from the blower perfor-
mance tables. Adjustment of blower speed is accom-
plished as follows:

1. Loosen belt tension by moving motor towards the 

blower shaft via the adjustable mounting.

2. Loosen the setscrew in the adjustable motor pulley 

flange. Remove key on pulleys 4-in. diameter and 
larger.

3. Blower speed will increase when moveable flange 

is adjusted towards the fixed flange (closed). 
Blower speed will decrease when the moveable 
flange is adjusted away from the fixed flange 
(opened). Pulleys are adjustable only in half-turn 
increments. Do not open pulley more than five full 
turns for "4L" and "A" belts, or six full turns for "B" 
belts.

4. Once the pulley has been opened/closed the 

appropriate numbers of turns, replace the external 
key and tighten the adjustment setscrew. Proper 
torque is 110-130 in.-lbs.

5. Install drive belts and adjust motor mount to ten-

sion belt.

TABLE 4: MOTOR AND PULLEY DATA

EVAPORATOR

 - STANDARD BLOWER MOTOR AND DRIVE DATA

Belts

HP

Frame

Eff.(%)

Pitch Dia.(in)

Browning #

Pitch Dia.(in)

Browning#

Rating / Size

Qty

3 TON

673-1010

1/3

56

68.0

2.0-3.0

1VP34 X 5/8

5.2

AK54H

4L370

1

4 TON

714-1071

1/2

56

75.0

2.0-3.0

1VP34 X 5/8

4.9

AK51H

4L370

1

5 TON

795-1193

3/4

56

75.0

2.0-3.0

1VP34 X 5/8

4.4

AK46H

4L360

1

8 TON

784-1045

1 1/2

145

84.0

3.0-4.0

1VP44 X 7/8

6.7

AK69H

4L380

1

10 TON

820-1094

2

145

84.0

3.0-4.0

1VP44 X 7/8

6.4

AK66H

4L370

1

12 TON

784-1045

2

145

84.0

3.0-4.0

1VP44 X 7/8

6.7

AK69H

4L370

1

15 TON

848-1064

5

184

87.5

4.7-5.9

1VP60 X 1-1/8

9.7

BK100H

B40

1

20 TON

848-1064

5

184

87.5

4.7-5.9

1VP60 X 1-1/8

9.7

BK100H

B50

1

25 TON

902-1082

7-1/2

213

88.5

5.0-6.0

1VP62 X 1-3/8

9.7

BK100H

BX51

1

EVAPORATOR

 - OVERSIZE BLOWER MOTOR AND DRIVE DATA

Belts

HP

Frame

Eff.(%)

Pitch Dia.(in)

Browning #

Pitch Dia.(in)

Browning#

Rating / Size

Qty

3 TON

897-1346

1/2

56

68.0

2.0-3.0

1VP34 X 5/8

3.9

AK41H

4L350

1

4 TON

946-1419

3/4

56

75.0

2.0-3.0

1VP34 X 5/8

3.7

AK39H

4L350

1

5 TON

946-1419

1

56

75.0

2.0-3.0

1VP34 X 5/8

3.7

AK39H

4L350

1

8 TON

972-1296

2

145

84.0

3.0-4.0

1VP44 X 7/8

5.4

AK56H

4L360

1

10 TON

1068-1364

3

145

86.5

3.6-4.6

1VP50 X 1-1/8

5.9

AK61H

A35

1

12 TON

984-1258

3

145

86.5

3.6-4.6

1VP50 X 1-1/8

6.4

AK66H

A36

1

15 TON

848-1064

5

184

87.5

4.7-5.9

1VP60 X 1-1/8

8.2

BK85H

B36

1

20 TON

1046-1287

7-1/2

213

88.5

5.2-6.4

1VP65 X 1-3/8

8.8

BK90H

BX50

1

25 TON

1033-1296

10

213

88.5

4.7-5.9

1VP60 X 1-3/8

15.7

BK160H

BX60

1

CONDENSER

 - STANDARD BLOWER MOTOR AND DRIVE DATA

Belts

HP

Frame

Eff.(%)

Pitch Dia.(in)

Browning #

Pitch Dia.(in)

Browning#

Rating / Size

Qty

3 TON

673-1010

1

143

82.5

2.0-3.0

1VP34 X 7/8

5.4

AK54H

4L400

1

4 TON

648-972

1

143

82.5

2.0-3.0

1VP34 X 7/8

5.4

AK56H

4L400

1

5 TON

771-1068

1 1/2

145

84.0

2.6-3.6

1VP40 X 7/8

5.9

AK61H

4L420

1

8 TON

761-1014

2

145

84.0

3.0-4.0

1VP44 X 7/8

6.9

AK71H

A65

1

10 TON

875-1118

3

182

86.5

3.6-4.6

1VP50 X 1-1/8

7.2

AK74H

A65

1

12 TON

685-875

3

184

86.5

3.6-4.6

1VP50 X 1-1/8

9.2

AK94H

A68

1

15 TON

794-974

5

184

87.5

4.4-5.4

1VP56 X 1-1/8

9.7

BK100H

B69

1

20 TON

717-882

7-1/2

213

87.5

5.2-6.4

1VP65 X 1-3/8

12.7

BK130H

B80

1

25 TON

717-882

7-1/2

213

87.5

5.2-6.4

1VP65 X 1-3/8

12.7

BK130H

B88

1

Adjustable

Motor Pulley

Fixed

Blower Pulley

Adjustable

Motor Pulley

Fixed

Blower Pulley

Drive Range

(RPM)

Motor

Adjustable

Motor Pulley

Model

Drive Range

(RPM)

Fixed

Blower Pulley

Model

Motor

Motor

Model

Drive Range

(RPM)

Содержание EMBASSY Series

Страница 1: ...ADJUSTMENT 17 LOW AMBIENT DAMPER INSTALLATION 18 START UP AND OPERATION 19 MAINTENANCE SERVICE 20 See the following page for a complete Table of Contents NOTES CAUTIONS AND WARNINGS The installer shou...

Страница 2: ...T CIRCUIT S 20 LIST OF FIGURES Fig Pg 1 DSK TYPICAL APPLICATIONS 4 2 3 4 5 TON UNITS DIMENSIONAL DATA CORNER WEIGHTS 7 3 8 10 TON UNITS DIMENSIONAL DATA CORNER WEIGHTS 8 4 12 15 TON UNITS DIMENSIONAL...

Страница 3: ...duce vibration and noise while operating Each refrigerant circuit is equipped with high pressure and low pressure switches An electrically re settable lockout relay will shut off the compressor in the...

Страница 4: ...036 21540 001 A 0503 4 Unitary Products Group FIGURE 1 DSK TYPICAL APPLICATIONS...

Страница 5: ...urrounding areas should be taken when choosing a location to install the unit Common vibration and sound levels associated with commercial equipment may be objectionable to people or equip ment Refer...

Страница 6: ...brackets from the out side corners of the cabinet at the joint line between the evaporator and condenser sections Remove the evaporator section ASSEMBLY OF SPLIT UNITS All models Place the condensing...

Страница 7: ...036 21540 001 A 0503 Unitary Products Group 7 FIGURE 2 3 4 5 TON UNITS DIMENSIONAL DATA CORNER WEIGHTS...

Страница 8: ...036 21540 001 A 0503 8 Unitary Products Group FIGURE 3 8 10 TON UNITS DIMENSIONAL DATA CORNER WEIGHTS...

Страница 9: ...036 21540 001 A 0503 Unitary Products Group 9 FIGURE 4 12 15 TON UNITS DIMENSIONAL DATA CORNER WEIGHTS...

Страница 10: ...036 21540 001 A 0503 10 Unitary Products Group FIGURE 5 20 TON UNIT DIMENSIONAL DATA CORNER WEIGHTS...

Страница 11: ...036 21540 001 A 0503 Unitary Products Group 11 FIGURE 6 25 TON UNIT DIMENSIONAL DATA CORNER WEIGHTS...

Страница 12: ...ute Size condenser air discharge for 1 200 1 500 feet minute nominal velocity Maximum recommended 1 700 feet minute The use of louvers with higher velocities than above may be employed at the discreti...

Страница 13: ...ting panel Do not remove fasteners securing blowers to panel The blowers are to remain attached to the mounting panel at all times Carefully remove the blower panel assembly from the evaporator cabine...

Страница 14: ...ned to be read Provide individual power disconnects for each unit or each section in the case of split applications Install a secure ground to both evaporator and condenser If canvas flexible joints a...

Страница 15: ...230 1 60 1 17 9 88 0 0 50 4 4 1 00 7 4 34 18 50 208 230 3 60 1 11 4 77 0 0 50 2 1 1 00 3 1 19 45 30 460 3 60 1 5 7 39 0 0 50 1 0 1 00 1 4 9 53 15 575 3 60 1 4 7 31 0 0 50 0 8 1 00 1 1 7 79 15 4 TON 20...

Страница 16: ...6 870 2 41 920 2 70 970 2 90 1010 3 20 1050 3 46 1100 3 70 1145 3 90 1180 4 30 15 TON 6000 824 2 52 873 2 77 920 3 03 967 3 30 1010 3 58 1052 3 90 1097 4 24 1137 4 59 1178 4 95 1220 5 33 6600 903 3 33...

Страница 17: ...1VP44 X 7 8 6 7 AK69H 4L370 1 15 TON 848 1064 5 184 87 5 4 7 5 9 1VP60 X 1 1 8 9 7 BK100H B40 1 20 TON 848 1064 5 184 87 5 4 7 5 9 1VP60 X 1 1 8 9 7 BK100H B50 1 25 TON 902 1082 7 1 2 213 88 5 5 0 6 0...

Страница 18: ...ighten the flare nuts securely NOTE On dual and triple compressor units the actuator MUST be connected to the 1 circuit liquid line fit ting Connection to the second or third stage refrig erant circui...

Страница 19: ...re is no negative impacts on durability caused by operating three phase Scroll compressors in the reversed direction for a short period of time less than one hour However after several minutes of oper...

Страница 20: ...ing screw is properly set Check that the blower wheel is tight on the shaft and that the hub setscrews are properly torqued DRIVE BELTS Examine belts periodically for wear Glazed areas on the drive su...

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