COOK ERV - Manual (Page 10)

10
System Start-Up
Start Up
Turn the fan on, and inspect for the following:
• Direction of rotation.
• Excessive vibration.
• Unusual noise.
• Bearing noise.
• Improper belt alignment or tension (listen for squeal-
ing).
• Improper motor amperage or voltage.
If a problem is discovered, immediately shut the fan
off. Lock out all electrical power and check for the
cause of the trouble. See Troubleshooting.
Inspection
Inspection of the fan should be conducted at the first 30
minute, 8 hour and 24 hour intervals of satisfactory opera-
tion. During the inspections, stop the fan and inspect as per
the Conditions Chart.
30 Minute Interval
Inspect bolts, setscrews, and motor mounting bolts.
Adjust and tighten as necessary.
8 Hour Interval
Inspect belt alignment and tension. Adjust and tighten as
necessary.
24 Hour Interval
Inspect belt tension on both blowers and energy wheel
drive belt. Adjust and tighten as necessary.
Unit Maintenance
Intake Hood Filters
Filter inspection and cleaning intervals can vary from
once a week to twice per year depending on contaminants
present and acceptable pressure drops across the filter.
Under most conditions filters may be cleaned with hot water
and a mild soap solution (such as dish washing liquid) or
steam. Some caustic cleaners will damage the filter. If in
doubt, please consult the factory for a compatibility list.
High pressure spray washers should be limited to 2,000
psi operating pressure. Every attempt should be made to
remove the contaminants from the filter in a “backwash”
flow (note airflow arrow on the filter frame). Once the filter is
dry, it may be returned to the appropriate filter racks in the
same orientation (airflow direction) as they were removed.
Return Air/Intake Air Disposable Filters
If filters are excessively dirty, replace.
Routine Maintenance
Establish a schedule for inspecting all parts of the fan.
The frequency of inspection depends on the operating con-
ditions and location of the fan.
It is recommended the following inspection be conducted
twice per year.
• Inspect bolts and setscrews for tightness. Tighten as
necessary.
• Inspect belt wear and alignment. Replace worn belts
with new belts and adjust alignment as needed. Refer
to Belt and Pulley Installation, page 9.
• Bearings should be inspected as recommended in the
Conditions Chart.
• Inspect filters by removing filter access door.
• Inspect springs and rubber isolators for deterioration and
replace as needed.
• Inspect for cleanliness. Clean exterior surfaces only.
Removing dust and grease on motor housing assures
proper motor cooling. Removing dirt from the wheel and
housing prevent imbalance and damage.
Motor Bearings
Motor bearings are pre-lubricated and sealed. Under nor-
mal conditions they will not require further maintenance for a
period of ten years. However, it is advisable to have your
maintenance department remove and disassemble the
motor, and lubricate the bearings after three years of opera-
tion in excessive heat and or in a contaminated airstream
consisting of airborne abrasives.
Lubrication - Fan Bearings
Vane Axial bearings are lubricated through a grease fitting
on the exterior of the fan housing and should be lubricated
by the schedule, Lubrication Conditions Chart.
Before lubricating, the grease nipple and immediate vicin-
ity should be thoroughly cleaned without the use of high
pressure equipment. The grease should be supplied slowly
as the bearing rotates until fresh grease slips past the seal.
Excessive pressure should be avoided to prevent seal dam-
age.
Use no more than three injections with a hand-operated
grease gun.
Exceptions to the greasing interval chart:
• Periodic Applications (any break of one week or
more): it is recommended that full lubrication be performed
prior to each break in operation.
• Higher Temperature: it is recommended to halve the
intervals for every 30
F increase in operating temperature
above 120
F not to exceed 230F for standard bearings;
High Temperature bearings (optional) can operate up to
400
F.
• Vertical Shaft: it is recommended that the intervals
should be halved.
Loren Cook Company uses petroleum lubricant in a lith-
ium base. Other types of grease should not be used unless
the bearings and lines have been flushed clean. If another
type of grease is used, it should be a lithium-based grease
conforming to NLGI grade 2 consistency.
A NLGI grade 2 grease is a light viscosity, low-torque,
rust-inhibiting lubricant that is water resistant. Its tempera-
ture range is from -30
F to +200F and capable of intermit-
tent highs of +250
F. For temperatures above 250
Mobiltemp SHC 32 is recommended.
Conditions Chart
RPM Temperature
Fan
Status
Greasing
Interval
100 Up to 120°F Clean 6 to 12 months
500 Up to 150°F Clean 2 to 6 months
1000 Up to 210°F Clean 2 weeks to 2 months
1500 Over 210°F Clean Weekly
Any
Speed
Up to 150°F Dirty 1 week to 1 month
Any
Speed
Over 150°F Dirty Daily to 2 weeks
Any
Speed
Any Temperature Very Dirty Daily to 2 weeks
Any
Speed
Any Temperature
Extreme
Conditions
Daily to 2 weeks