Greenheck MSX (470658) - Manual (Page 35)

35 Modular Supply Make-Up Air Unit
®
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 checked
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.
Evaporative Coolers
The media should be periodically brushed lightly with
a soft bristle brush in an up and down motion while
flushing with water. This aids in reducing the amount of
mineral build-up.
For large amounts of mineral build-up, clean or replace
the media and increase the water bleed-off or flush rate.
The cooling media has a useful life of 3 to 5 years
depending on the water quality and the bleed-off or
flush rate.
Leaving Air Entering Air
45º
15º
Media Orientation
IMPORTANT
When reinstalling the evaporative media, make sure
that it is installed correctly. Reference the drawing
shown below.
IMPORTANT
Replacement media should be from the same
manufacturer and be the same size as the original
media provided with the unit.
Bearings
The bearings for manufacturer 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.
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.
Recommended Bearing Lubrication Schedule (in Months*)
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 (66°C) 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 shots 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 here:
Mobil 532
Mobilux #2 Texaco Multifak #2
Texaco Premium #2 B Shell Alavania #2
Exxon Unirex #2