WeatherMaster® Single-Packaged Rooftop Units 50P: Quarterly Maintenance

The following steps should be taken to clean MCHX condenser coils:

• Remove any foreign objects or debris attached to the core face or trapped within the mounting frame and brackets.

• Put on personal protective equipment, including safety glasses and/or face shield, waterproof clothing, and gloves. It is recommended to use full-coverage clothing.

• Start high-pressure water sprayer and purge any soap or industrial cleaners from sprayer before cleaning condenser coils. Only clean, potable water is authorized for cleaning condenser coils.

• Clean condenser face by spraying the core steadily and uniformly from top to bottom while directing the spray straight toward the core. Do not exceed 30 degree angle. The nozzle must be at least 12 in. from the core face. Reduce pressure and use caution to prevent damage to air centers.

Clean or replace at start of each heating and cooling season or more often if operating conditions require. Refer to Installation Instructions for type and size.

• Remove economizer outdoor-air filters from the hoods by removing the filter retainers.

• Clean filters with steam or hot water and mild detergent.

• Reinstall filters in hoods after cleaning. Never replace cleanable filters with throwaway filters.