Motor And Drive Package Data; Variable Frequency Drive; Main Fan Replacement - Carrier Aero 39MN Series Installation, Start-Up And Service Instructions Manual

Table 47 — Recommended
Relubrication Grease Charge
SHAFT SIZE (in.)
1 5
/ TO /
2 8
3
/
4
13 / TO 1
16
1 1 / TO 1 1 / S
16 4
1 1 / TO 1 7 /
4 16
1 1 / TO 1 9 /
2 16
5 3
1 / TO 1 /
8 4
13
1 / TO 2 S
16
13
2 TO 2 /
16
2 1 / TO 2 7 /
4 16
2 1 / TO 2 11 /
2 16
2 13 / TO 2 15 /
16 16
LEGEND
S — Smaller Shaft Housing Size
Table 48 — Relubrication Intervals
ENVIRONMENT TEMPERATURE (F)
Dirty -20 to 250
-20 to 125
Clean
125 to 175
175 to 250
LEGEND
NLGI — National Lubricating Grease Institute
NOTE: Use NLGI No. 2 Lithium or Lithium Complex Grease.
Motor and Drive Package Data —
give motor data for forward-curved, airfoil, and plenum fans.
Variable Frequency Drive —
priate environment, the VFD requires very little maintenance.
Table 49 lists the routine maintenance intervals recommended
by Carrier.
Table 49 — Maintenance Intervals
MAINTENANCE
Heat sink temperature check
and cleaning
Main cooling fan replacement
Capacitor change (frame size R5
and R6)
HVAC control panel battery
change
HEAT SINK — The heat sink fins accumulate dust from the
cooling air. Since a dusty heat sink is less efficient at cooling
the drive, over temperature faults become more likely. In a nor-
mal environment check the heat sink annually, in a dusty envi-
ronment check more often.
Check the heat sink as follows (when necessary):
1. Remove power from drive.
2. Remove the cooling fan.
3. Blow clean compressed air (not humid) from bottom to
top and simultaneously use a vacuum cleaner at the air
GREASE CHARGE (oz)
0.02
0.03
0.03
0.06
0.09
0.14
0.16
0.18
0.25
0.35
0.46
0.48
SPEED (%) FREQUENCY
0-100 Daily to 1 week
0-25 4 to 10 months
26-50 1 to 4 months
51-75 1 week to 1 month
76-100 Daily to 1 week
0-25 2 to 6 weeks
26-50 1 week to 1 month
51-75 Daily to 1 week
76-100 Daily to 1 week
0-100 Daily to 1 week
Tables 5 and 6
If installed in an appro-
INTERVAL
Every 12 Months (More Often If
Operating In A Dusty
Environment)
Every Five Years
Every Ten Years
Every Ten Years
outlet to trap the dust. If there is a risk of the dust
entering adjoining equipment, perform the cleaning in
another room.
4. Replace the cooling fan.
5. Restore power.
MAIN FAN REPLACEMENT — The main cooling fan of
the VFD has a life span of about 60,000 operating hours at
maximum rated operating temperature and drive load. The ex-
pected life span doubles for each 18°F drop in the fan tempera-
ture (fan temperature is a function of ambient temperatures and
drive loads).
Fan failure can be predicted by the increasing noise from
fan bearings and the gradual rise in the heat sink temperature in
spite of heat sink cleaning. If the drive is operated in a critical
part of a process, fan replacement is recommended once these
symptoms start appearing. Replacement fans are available
from Carrier.
To replace the main fan for frame sizes R1 through R4, per-
form the following (see Fig. 191):
1. Remove power from drive.
2. Remove drive cover.
3. For frame sizes R1 and R2, press together the retaining
clips on the fan cover and lift. For frame sizes R3 and
R4, press in on the lever located on the left side of the
fan mount, and rotate the fan up and out.
4. Disconnect the fan cable.
5. Install the new fan by reversing Steps 2 to 4.
6. Restore power.
To replace the main fan for frame sizes R5 and R6, perform
the following (see Fig. 192):
1. Remove power from drive.
2. Remove the screws attaching the fan.
3. Disconnect the fan cable.
4. Install the fan in reverse order.
5. Restore power.
a39-2922
3
4
2
Fig. 191 — Main Fan Replacement
(Frame Sizes R1 - R4)
235
3