Variable Frequency Drive Operation; Field Coating Touch-Up Procedure - Greenheck BIDW Installation, Operation And Maintenance Manual

Variable Frequency Drive Operation

WARNING
For operation with a Variable Frequency Drive
(VFD), always check motor amps when adjusting
the operating frequency. Motor may be sized for
the original selected operating speed under 60 Hz.
Bypassing the VFD or increasing the speed from this
original selection, even if less than 60 Hz, may cause
motor overload or failure. Consult factory with fan
serial number before increasing the upper limiting
frequency.
Always check the fan rpm when adjusting the
operating frequency. Do not exceed maximum
class fan rpm of the wheel as stated on the unit
identification nameplate.
It is the responsibility of the installing body to perform
coast-down tests and identify any resonant frequencies
after the equipment is fully installed. These resonant
frequencies are to be removed from the operating
range of the fan by using the "skip frequency" function
in the VFD programming. Failure to remove resonant
frequencies from the operating range will decrease the
operating life of the fan and void the warranty.
12 Centrifugal, Industrial and Filtered Supply

Field Coating Touch-Up Procedure

for Scratched Areas
Standard coating and color is RAL7023 Concrete Grey.
The procedure outlines the correct method for repairing
minor scratches in the coating.
TOUCH-UP PAINT REPAIR KIT CONTENTS
• One pint of Kem Kromik
- including a technical data sheet
• One pint of industrial enamel
- including a technical data sheet
• Four disposable foam brushes
• One sheet sandpaper
• Repair procedure details
1. Scuff affected area to be repaired using medium
sandpaper (provided) or medium Scotch Brite™ pad.
Feather the edges.
2. Clean affected area to be touched up using an
alkaline based cleaner and rinse.
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3. Apply Kem Kromik primer using 1 inch foam brush
(provided). Follow technical data sheet instructions.
4. Allow primer to dry a minimum of 2-1/2 hours before
top coating.
5. Apply topcoat with industrial enamel using 1 inch
foam brush (provided). Follow technical data sheets
instructions. Allow painted units to air-dry and cure
before putting into service. See Technical Data
sheets (included with kit) for detailed drying and cure
schedules at different temperatures.
NOTE
While the manufacturer provides heavy-duty, quality
products for marine environments, routine paint
touch-ups may be required in coastal regions where
salt or marine air could damage the coating. The
severe environment will accelerate the damage from
any scratches or chips and it is recommended that
those be repaired immediately.
To order additional coating repair kits please reference
part number HAZ2597 PNT FIELD REPAIR KIT,
RAL7023 CONCRETE GREY. Please contact factory
with your fan's serial number for colors other than our
standard.
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primer