September 2020
13
Quest IQ Dry Cooler OMM
Monthly
–
Quartely
Observe equipment general operation (for unusual vibration, noise etc.)
Verify control settings (
applicable to “self
-controll
ed” equipment
)
Inspect the airside coils for dirt, cobweb build-up, etc.; clean as needed
Semi-Annually
–
Annually
Check electrical connections (both, power and control), tighten as needed
Check the frame and fasteners for being structurally sound (loose fasteners,
corroded/deteriorating components etc.)
Check glycol/water mixture ratio/percentage, adjust as needed.
Specific Components Maintenance and Special Tasks.
Airside Coil(s)
Cleaning.
•
Warning: Hazardous chemicals!
Cleaning agents can be highly acidic or alkaline. Handle all chemicals carefully
and use appropriate personal protective equipment (PPE). Refer to the cleaning agent manufacturer's Materials
Safety Data Sheet (MSDS) for safety and handling information. Failure to follow all safety instructions could
result in serious injury or death.
To clean the coil:
•
Disconnect all electrical power to the equipment
•
Use a soft brush to remove loose debris from the coil
•
Mix a high-quality coil cleaning detergent with water according to the manufacturer's instructions
•
Clean coil according to suggested instructions
•
Thoroughly rinse both sides of the coil and the drain pan with, clean water
•
Straighten any coil fins that have been bent during the cleaning process
•
Replace all panels and parts and restore electrical power to the equipment
Dry cooler Service.
Normally dry coolers are filled with glycol mixture to prevent the system and the dry cooler from freezing and
potentially rupturing pipes when exposed to temperatures below freezing point.
Though dry cooler itself is normally equipped with means to be drained properly/fully, it is recommended to have
same means in place for entire system/equipment dry cooler serves:
•
Have each local high point of the system equipped with means to bleed the air (air bleeding valve etc.)
•
Have each local low point of the system equipped with means to drain the fluid.
CAUTION.
Draining and re-filling the dry cooler must be performed by trained personnel, according to proper
field practice and system layout. Improper draining or re-filling the system could lead to equipment damage,
malfunction, premature wear and tear and may void equipment warranty. Ensuring that the dry cooler and associated
system(s) equipped with proper means of draining, creating draining and re-filling procedures as well as determining
whether draining is warranted to protect the equipment is outside of manu
facturer’s scope and is a sole responsibility
of installing contractor and local maintenance team.
