ROUTINE MAINTENANCE
CAUTION: See **WARNING** on Page 1
After the ERV has been put into operation, an annual inspection and maintenance
program should be set-up to preserve reliability and performance. Include the
following items in this program,
• BELTS • REMOVAL OF DUST/DIRT
• FASTENERS • FILTER MAINTENANCE
• SET SCREWS • ENERGY WHEEL CASSETTE
BELTS
Premature belt failures are frequently caused by improper belt tension
(either too tight or too loose) or misaligned pulleys. The proper tension
for operating a V-belt is the lowest tension at which the belts will not
slip at peak load conditions. For initial tensioning, the proper belt
deflection half way between pulley centers is
3
/8
inch
per foot of belt
span. The belt deflection should be
3
/8
inch using moderate thumb
pressure at midpoint of the drive (See Figure 6).
Check belt tension two weeks after start-up and periodically thereafter.
To adjust belt tension, simply loosen four fasteners (two on each side
of the motor plate) and slide the motor plate away from the fan shaft
until proper belt tension is attained. On some ERVs, fasteners attaching
the motor to the motor plate must be loosened in order to adjust the
belt.
It is very important that the drive pulleys remain in proper alignment
after adjustments are made. Misalignment of pulleys will result in
premature belt wear, noise, vibration and power loss.(See Figure 7).
Maintain belts and motors through the provided access panels.
FASTENERS AND SET SCREWS
Any fan vibration has a tendency to loosen mechanical fasteners. A
periodic inspection should include checking all fasteners and set
screws for tightness. Particular attention should be paid to set screws
attaching the fan wheel to the shaft and the shaft to the bearings.
Loose bearing set screws will lead to premature failure of the fan shaft.
REMOVAL OF DUST AND DIRT
Dirt clogs cooling openings on the motor housing, contaminates
bearing lubricant and collects on fan wheel blades causing severe
imbalance if left unchecked. The exterior surface of the motor, inlet area
and entire fan wheel should be thoroughly cleaned periodically. Use
caution and do not allow water or solvents to enter the motor or
bearings. Under no circumstances should motors or bearings be
sprayed with steam or water. Maintenance to these components is
achieved through the provided access panels.
To Next Page
Loading...
Need help?
General