Kees MUA TEMPERED MAKE-UP AIR UNITS - Heating & Cooling Coil I & M Manual - Manual (Page 2)

KEES, INC.
Products for Food Service & Sheet Metal Industry
400 S. INDUSTRIAL DRIVE - P.O. BOX L - ELKHART LAKE, WISCONSIN 53020 - (920) 876-3391 - FAX (920) 876-3065
Direct Expansion (Dx) Coil Instructions
Application Recommendations:
1. Piping should be in accordance with accepted industry standards. Pipework should be supported
independently of the coils. Undue stress should not be applied at the connection to coil headers.
2. The condensate drain pipe should be sized adequately to ensure the condensate drains properly.
3. When connecting suction and liquid connections make sure the coil is free from all foreign material.
Make sure all joints are tight and free of leakage.
4. KEES, Incorporated does not supply compressor or condensing units. Contact your compressor
and/or condenser manufacturer for further instruction on Dx coil installation and operation.
Maintenance Instructions:
1. Filters upstream of the coil should be checked regularly for dirtiness and clogging. If the filters are
dirty, they should be cleaned or replaced. It is important that the coils stay clean to maintain
maximum heat transfer capability.
2. 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 (700 Psi or less) may be used to clean coils with
fin thickness over 0.0095 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.
3. 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 build-up 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. Qualified personnel should perform cleaning.