Carrier 50DF034 - Manual (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 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.
15 790