Laboratory Exhaust System
13
®
Recommended Bearing Lubrication Schedule
Relubrication Schedule in Months*
Fan Size
9 - 13
16 - 22
24
30 - 36
Fan
RPM
Bearing Bore (inches)
1
⁄
2
- 1
1
1
⁄
8
- 1
1
⁄
2
1
5
⁄
8
- 1
7
⁄
8
1
15
⁄
16
- 2
3
⁄
16
to 250
12
12
12
12
500
12
12
12
12
750
12
12
12
12
1000
12
12
12
12
1250
12
12
12
12
1500
12
12
12
10
2000
12
10
8
6
2500
12
7
5
4
3000
12
5
3
2
3500
12
3
2
0.75
4000
12
2
0.5
5000
12
1
Number
of shots of
grease**
4
8
8
10
* Lubrication interval is based on 12 hour per day operation and
maximum 160°F. housing temperature. For 24 hour per day
operation, the interval should be cut in half.
** Lubricant should be added with the shaft rotating and until clean
grease is seen purging from the bearing. The lubrication interval
may be modified based on the condition of the purged grease.
If bearing is not visible to observe purged grease, lubricate with
number of shots indicated for bore size.
Damper and Damper Actuators
If access is required to a gravity isolation damper,
remove the panel opposite the weatherhood on the
bypass air plenum section and slide the damper straight
out toward you.
When performing maintenance on an isolation damper
with
an actuator, remove the bolted weatherhood, and
disconnect the actuator from damper. Then remove
the panel opposite the weatherhood on the bypass air
plenum section and slide the isolation damper out.
Damper actuators, when supplied by Greenheck, are
designed to be maintenance free. No lubrication is
required.
Bypass Damper
Weatherhood
Isolation Damper
Pull
Isolation Damper
in this direction
Bypass Air Plenum
Access Panel
opposite side of the
Weatherhood
CAUTION
If performing maintenance on the dampers or
replacing actuators, disconnect power to damper
actuators.
Vektor-HS Nozzle Bearings
The bearings for the HS nozzle assembly are
permanently lubricated and do not require additional
grease.
Maintenance (continued)
• The use of non-synthetic grease will decrease
lubrication intervals by approximately 3 times.
• Storage periods of 3 months or longer require
monthly rotation of the shaft and purging grease prior
to storage and start-up.
