Carrier 50DF034 User Manual download pdf (Page 15)

Table 3 — Indoor Air Fan Data

EXTERNAL STATIC PRESSURE (in. wg)

UNIT

50DF

CFM 0.20

0.40

0.60 0.80

1.00

1.20

1.40 1.60 1.80 2.00

2.20

Rpm Bhp

Rpm

Bhp Rpm

Bhp

Rpm Bhp Rpm

Bhp Rpm

Bhp Rpm Bhp

Rpm Bhp

9,000 690

2 86

755

3 40

812

3 91 865

4 42 916

4 94

960 5 42

1006 5 94 1052

6 48

1094 7.02 1133

7.57

1173 8.18

9,500

720 3 29

784

3 88 839 4 42 891 4 95 940

5 49

985 6 03

1026 6 54

1071

7 10

1114 7.67

1153

8.24

1190

8.81

10,000 751

3 76

813

4 40

867 4 97

917 5 53

964 6 09

1010 6 67

1051

7 22

1091 7.77

1133 8.36 1174 8.97

1211 9.56

10,500

782 4 28 842

4 96

895 5 57

943 6 16

990 6 75

1034 7 35

1076

7 96 1114

8.51

1152 9.10 1193 9.73 1232 10.37

11,000

814

4 80 871

5 60 923

6 20 971

6 80 1016 7 50

1059

8 10

1100 8.70

1139

9.30

1174

9.90

1212 10.50

1250

11.20

11,500

845

5 50

901 6 20 952

6 90

999 7 60 1042 8 20

1085 8.90

1125

9.50

1164

10.20

1200 10.80

1233 11.40

1270 12.10

034

12,000 877

6 10 931

7 00

981

7 70

1027

8 40 1069 9 00

1110 9.70

1150

10.40

1188 11.10

1225 11.80 1258 12.40

1291 13.10

12,500 909

6 80 962 7 70 1010

8 50

1055

9 20 1097 9.90

1136 10.60

1176

11.30

1213

12.00

1249 12.80 1284 13.50

13,000

941

7 60 992 8 50

1039

9 40 1 1083

10.10 1125 10.90

1163 11.60 1201

12.30

1238 13.10 12^

13.80

13,500

973

8 50 1023 9 40

1069 10 30

1112

11.10 1153 11.90

1191

12.60

1227

13.40

1264 14.10

1298

14.90

14,000

1006

9 40 1054 10 40

1099 11.30

1141

12.10

1181 12.90

1218 13.70 1254

14.50

1290 15.30

14,500

1038

10 30 1085 11.40

1129 12.30

1170

13.20

1209

14.10

1246 14.90

1282 15.70

15,000

1071

11 30 1116 12.40

1159 13.50

1200

14.40

1238 15.30

1275

16.10

Boldface indicates aiternate or field-supplied fan motor or drive is required.

Bhp — Brake horsepower

Rpm — Revolutions per minute

NOTES:

1 Values in italics indicate that motor larger than optional fan motor is required

2 Fan performance has deductions for unit casing losses, wet coil and clean standard filters

3 Fan motor bhp is based on minimum voltages and 80 F air across motor

Table 1 for type and size of filter used. Filter access panels

are shown in Fig. 4. Return air filter tracks will accept 2

layers of one-in. thick filters if 2-in. filters are not avail

able. Do not install bag filters in standard filter tracks.

Do not install standard filters or 2-in. high-efficiency

filters in bag filter tracks.

OUTDOOR AIR INLET SCREEN(S) — Clean screens

with steam or hot water and mild detergent. Do not use

throwaway filter in place of these screens. Loosen

fastening-bracket screws and slide out screens.

Lubrication

COMPRESSORS — Each compressor is charged with

correct amount of oil at the factory. Oil level should be

between bottom and mid-level of sight glass when com

pressor is warm. Refer to 06D or 06E Compressor Serv

ice Manual if additional information regarding com

pressor lubrication system is required.

FAN SHAFT BEARINGS — Charge each grease fitting

with a suitable bearing grease at least once a year. Do

not overlubricate.

FAN MOTOR BEARINGS — No relubrication of out

door air fan motors is necessary for first 2 to 5 years of

use, depending on operating conditions Annually there

after, open, clean and repack each bearing with a suitable

bearing grease

Indoor air fan motor bearings should be cleaned and

repacked with a suitable bearing grease annually after

initial unit installation.

After reinstalling pulley and belt, check pulley align

ment and belt tension as described below.

PULLEY ALIGNMENT — Loosen fan shaft pulley

bushing and slide pulley along shaft. Make angular

adjustment by loosening motor mounting plate and repo

sitioning it as required.

BELT TENSION — Adjust belt tension by moving

motor back until only a slight bow appears in the belts on

the slack side of the drive while running under full load.

Secure motor. Recheck belt tension after 24 hours of

operation, adjust as necessary.

Table 4 — Indoor Air Fan Pulley Data

UNIT

50DF

FAN

RPM

MOTOR

PULLEY

FAN

PULLEY

SINGLE-SPEED

BELT

NO.-SIZE

No. Grooves-Type-ln.

925 2-3V-5.6 2-3V-10.6

2-3V-750

991 2-3V-6.0 2-3V-10.6

2-3V-750

1073 2-3V-6.5

2-3V-10.6

2-3V-750

1093

3-3V-5.0

3-3V- 8.0

3-3V-710

1141

4-3V-4.5

4-3V- 6.9

4-3V-670

1159 4-3V-5.3

4-3V- 8.0

4-3V-710

1225 4-3V-5.6

4-3V- 8.0

4-3V-710

1300

3-3V-6.0

3-3V- 8.0

3-3V-710

'Remove one belt

NOTE: Values shown indicate standard or optional pulley combinations

available as shown in Physical Data table All other combinations are field

supplied and shown in boldface type

Indoor Air Fan Adjustment — Fixed fan speeds

are set as shown in Table 1. If other than available fan

speeds are required, select field-supplied motor or

pulleys, using data from Tables 3 and 4.

PULLEY REMOVAL — Pulleys are of the fixed type

and have taper-lock bushings. To remove, shut off unit

power. Loosen fan motor mounting plate and remove

belt. Relocate taper-lock bushing bolts in removal holes

to loosen bushing. Remove pulley from shaft.

Power Exhaust Air Fan Adjustment (if fitted) —

Adjust belt tension so that 1/8-in. deflection at 5- to

8-pounds pressure between pulley centers can be

obtained. To change tension, loosen motor mounting

bolts, reposition motor and tighten mounting bolts.

Tighten locknut and bolt under motor mounting plate

to secure in fixed position.

790

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