Greenheck DG / DGX Industrial Space Heating (464044 IOM) (Pre-2009) - Manual (Page 25)

Filters
Filter maintenance is generally limited to cleaning and
replacement.
If aluminum mesh filters are installed, they can be washed in
warm soapy water.
An adhesive spray can be added to aluminum mesh filters to
increase their efficiency.
If disposable filters are installed, they can be check by
holding up to a light source. If light cannot pass through the
filter, it should be replaced.
IMPORTANT!
When reinstalling filters be sure to install
them with the airflow in the correct
direction. An airflow direction arrow is
located on the side of the filters.
IMPORTANT!
Replacement filters should be from the
same manufacturer and the same size as
the original filters provided with the unit.
Maintenance - Routine
M - 2
Recommended Bearing Lubrication Schedule for Greenheck Fans
Relubrication Schedule in Months*
Bearings
The bearings for Greenheck fans are carefully
selected to match the maximum load and operating
conditions of the specific class, arrangement and fan
size. The instructions provided in this manual and
those provided by the bearing manufacturer will
minimize any bearing problems.
Fan RPM Bearing Bore Size (inches)
1/2 - 1 1 1/8 - 1 1/2 1 5/8 - 1 7/8 1 15/16 - 2 3/16 2 7/16 - 3
250 6 6 6 6 6
500 6 6 6 5 4
750 6 5 4 3 3
1000 5 3 2 1 1
1250 5 3 2 1 1
1500 5 2 1 1 0.5
2000 5 1 1 0.5 0.25
* Suggested initial greasing interval is based on 12 hour per day operation and 150°F maximum
housing temperature. For continuous (24 hour) operation, decrease greasing interval by 50%
- If extended grease lines are present, relubricate while in operation, only without endangering
personnel.
- For ball bearings (operating) relubricate until clean grease is seen purging at the seals. Be sure not
to unseat the seal by over lubricating.
- For ball bearings (idle) add 1-2 shots of grease up to 2 inch bore size, and 4-5 shots above 2 inch
bore sizes with a hand grease gun.
- For roller bearings add 4 shot of grease up to 2 inch bore size, and 8 shots for 2-5 inch bore size
with a hand grease gun.
- Adjust relubrication frequency based on condition of purged grease.
- A high quality lithium based grease conforming to NLGI Grade 2 consistency, such as those listed
below.
Mobil 532 Texaco Multifak #2 B Shell Alavania #2
Mobilux #2 Texaco Premium #2 Exxon Unirex N2
IMPORTANT!
Lubricate bearings prior to periods of extended
shutdowns or storage and rotate shaft monthly
to aid in corrosion prevention. If the fan is
stored more than three months, purge the
bearings with new grease prior to start-up.