Daikin Rooftop System MPS 040F

The Maverick II includes the following refrigerant sensors or switches.

1. Low refrigerant pressure sensing, operating switch, automatic reset.

a. Disables associated compressors on a drop in suction pressure to approximately 35 psig.

b. Enables associated compressors on a rise in suction pressure to approximately 60 psig.

2. High refrigerant pressure, protective switch, manual reset at keypad.

The low pressure switch senses refrigerant pressure through shrader fittings that contain cores. The cores are stop valves that do not allow refrigerant to flow through the Shrader unless the device is in place. Therefore, the low pressure switch can be replaced without reclaiming the refrigerant.

The Shrader that serves the high pressure switch does not contain a core in order to maximize the functionality of the safety. Therefore it cannot be replaced unless the refrigerant has already been reclaimed.

Warning: Only trained personnel should perform this procedure.

Are the bearings exposed to wet conditions, wide temperature variations, or other severe atmospheric conditions?

If yes, relubricate more frequently.

Is the bearing at normal operating temperature?

Rotate the fan by hand and add only enough grease to purge the seals.

Select the type of lubricant used

Routine Quarterly Cleaning of Option E Coated Coil Surfaces

Quarterly cleaning is essential to extend the life of an Option E Coated Coil and is required to maintain warranty coverage.

Coil cleaning shall be part of the unit’s regularly scheduled maintenance procedures. Failure to clean an Option E Coated Coil will void the warranty and may result in reduced efficiency and durability in the environment.

For routine quarterly cleaning, first clean the coil with the below approved coil cleaner. After cleaning the coils with the approved cleaning agent, use the approved chloride remover (under the Recommended Chloride Remover section) to remove soluble salts and revitalize the unit.

Coil cleaned with approved cleaner?

Coil treated with recommended chloride remover?

Burner Air - Check burner fan wheel for dirt buildup and lint.

Check combustion air intake louver and flue box for dirt buildup and accumulation of windborne debris.

Cleaning - Inspect flue tubes and combustion chamber, cleaning as required. Keep burner vestibule clean. Dirt and debris can result in burner air blockages.

Supply fan motors should have grease added after every 2000 hours of operation.

Motor is warm, but not running?

Upper and lower grease plugs removed and cleaned?

Grease fitting inserted into the upper hole and a small amount of clean grease added with a low pressure gun?

Motor run for five minutes before installing the upper grease plug?

Sign off on the supply fans bearings lubrication