Coil Maintenance, Drain Pan Maintenance

Coil Maintenance

Coils must be clean to obtain maximum performance. Check once a year under normal operating conditions and, if dirty, brush or vacuum clean. Soiled fins reduce the capacity of the coil, demand more energy from the fan, and create an environment for odor and bacteria to grow and spread through the conditioned zone. High pressure water (400 psi or less) may be used to clean coils with fin thickness over 0.006 inches thick. Test the spray pressure over a small corner of the coil to determine if the fins will withstand the spray pressure.

For coils with fragile fins or high fin density, foaming chemical sprays and washes are available. Many coil cleaners contain harsh chemicals, so they must be used with caution by qualified personnel only. Care must be taken not to damage the coils, including fins, while cleaning.

CAUTION

Fin edges are sharp.

Winterizing Coils

Coil freeze-up can be caused by such things as air stratification and failure of outdoor air dampers and/ or preheat coils. Routine draining of water cooling coils for winter shutdown cannot be depended upon as insurance against freeze-up. Severe coil damage may result. It is recommended that all coils be drained as thoroughly as possible and then treated in the following manner.

Fill each coil independently with an antifreeze solution using a small circulating pump and again thoroughly drain. Check freezing point of antifreeze before proceeding to next coil. Due to a small amount of water always remaining in each coil, there will be diluting effect. The small amount of antifreeze solution remaining in the coil must always be concentrated enough to prevent freeze-up.

NOTE: Carefully read instructions for mixing antifreeze solution used. Some products will have a higher freezing point in their natural state than when mixed with water.

Drain Pan Maintenance

Drain pans in any air conditioning unit will have some moisture in them, therefore, algae and other organisms will grow due to airborne spores and bacteria. Periodic cleaning is necessary to prevent this buildup from plugging the drain and causing the drain pan to overflow. Inspect twice a year to avoid the possibility of overflow. Also, drain pans should be kept clean to prevent the spread of disease. Cleaning should be performed by qualified personnel.

Start-Up Documentation

Job Information

Job Name	__________________________________
Address	__________________________________

City ________________ State ______ Zip_ ___________

Phone Number __________________________________

Contact Person __________________________________

Start-Up Company Information

Service Oranization ________________________________

Address ________________________________

City ________________ State ______ Zip_ ___________

Phone Number	________________________________
Fax Number	________________________________
Start-Up Date	________________________________

Start-Up Personnel Name___________________________

Nameplate Information

Unit Model Number ________________________________

Volts_________________ Hertz _________ Phase ________

Amps________________Mark ________________________

Fan rpm______________

Unit Serial Number ________________________________

Field Start-Up Documentation

oCheck blower rotation

oCheck air volume (cfm)

__________ Design

__________ Actual

o Actual motor voltage	__________	Volts
o Actual motor hertz	__________	Hertz
o Actual motor phase	__________	Phase
o Actual motor amps	__________	Amps

Drive

oFan RPM Range

__________ Minimum

__________ Maximum

14 Model VFCD/VFCB Vertical Fan Coil