Appendix O: VHC-36, -42 and -50 Maintenance Summary Chart
Table O1: VHC-36, -42 and -50 Maintenance Summary Chart
Item
No. Description
Note
Monthly Quarterly
Semi-
annually
Annually
General
1
Inspect the general condition of the unit.
x
2
Remove any dirt or debris.
x
3
Check interior liners and partition for dirt buildup and
clean.
x
4
Check for unusual noise or vibration.
5
Lubricate the door latches.
x
Air filters
6
Replace prefilter.
1
7
Replace final filters.
x
8
Inspect holding frames/sliding track.
x
Forward
curved fans
9
Check bearing, fan and sheave set screw tightness.
2
x
10
Check fan and motor mounting bolt tightness.
3
x
11
Check sheave and fan belt condition and alignment.
x
12
Adjust belt tension.
4
x
13
Lubricate fan bearings.
5
14
Lubricate motor base adjusting screws.
x
15
Check condition of flexible connection.
x
16
Check for dirt buildup and clean.
x
17
Check motor voltage and current.
x
Plenum
supply fan
18
Check fan and motor mounting bolts and pedestal bolts
for tightness.
3
x
19
Check motor bearings for possible binding noise or
overheating.
x
20
Check fan wheels for dirt and grease accumulation.
Clean as necessary. Do not use any caustic cleaning
solutions.
x
21
Examine fan housings and motor pedestal for corrosion.
Clean and touch up with paint as necessary.
x
22
Check motor voltage and current to each motor.
x
Enthalpy
wheel
23
Verify wheel is rotating freely.
x
24
Check motor mounting bolts and drive sheave set screw
for tightness.
2
x
25
Check condition and tension of drive belt.
6
x
26
Check condition of brush seals.
x
27
Check for dirt buildup and clean.
x
28
Check condition of media, rim and spokes.
x
Dampers
29
Check damper actuator mounting and linkage fasteners
for tightness.
x
30
Inspect for dirt or leakage.
x
Notes
1
Check filters weekly after initial start-up until construction dust has been cleared and to gauge required interval.
2
Check set screw at start-up, after 24 hours, monthly for initial three months, then quarterly.
3
Check mounting bolts at start-up, after 24 hours, then quarterly.
4
Check and adjust belt tension at start-up, daily for the first week until they acquire their permanent set, then monthly.
5
See
for forward curved fan relubrication schedule.
6
Check and adjust belt tension at start-up, then after 24 hours of operation until they acquire their permanent set, then
quarterly.
VCES-VHC-IOM-1F – VHC-36, -42 & -50
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