Daikin Rooftop System MPS 015F

Heater and Ventilating systems - Inspected by a qualified service agency once a year.

Gas Train - Check all valves, piping and connections for leakage. Inspect and clean flame rod, ignition electrode, and burner manifold.

Condensate Pan/Drain/P-Trap - Check pan, drain, and p-trap.

Warning: Disconnect power to the drive motor before starting the procedure.

Power to the drive motor disconnected

Node of the segment inserted between hub plates with the embedded stiffener facing the motor side

Segment pressed towards the center of the wheel and inwards against the spoke flanges

Each Segment Retainer closed and latched under the Segment Retaining Catch

Second segment installed opposite the first for counter balance

WARNING: Hazardous voltage. May cause severe injury or death. Disconnect electric power before servicing equipment. More than one disconnect may be required to de-energize the unit.

If the electric heater is not operating properly, a qualified electrician should perform the following to check if the heater is damaged:

Measure continuity through all fuses.

Check that all electrical connections are tight. Look for signs of arcing.

Check the resistance to ground for each circuit. It should be infinite.

Check the resistance phase to phase for each circuit.

Sign off on the electric heater maintenance

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 temperatures?

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

Select the type of lubricant used

Sign off on the lubrication procedure

The need for periodic cleaning of the energy recovery wheel will be a function of operating schedule, climate and contaminants in the indoor air being exhausted and the outdoor air being supplied to the building.

The Daikin wheel is “self-cleaning” with respect tiny particles due to its laminar flow characteristics. Smaller particles pass through; larger particles land on the surface and are blown clear as the flow direction is reversed. Any material that builds up on the face of the wheel can be removed with a brush or vacuum.

The primary need for cleaning is to remove oil based aerosols that have condensed on energy transfer surfaces.

A characteristic of all dry desiccants, such films can close off micron sized pores at the surface of the desiccant material, reducing the efficiency by which the desiccant can adsorb and desorbs moisture and also build up so as to reduce airflow.

In a reasonably clean indoor environment such as school or office building, measurable reductions of airflow or loss of sensible (temperature) effectiveness may not occur for several years. Measurable changes in latent energy (water vapor) transfer can occur in shorter periods of time in applications such as moderate occupant smoking or cooking facilities.

In applications experiencing unusually high levels of occupant smoking or oil based aerosols such as industrial applications involving the ventilation of machine shop areas for example, annual washing of energy transfer may be necessary to maintain latent transfer efficiency.

Proper cleaning of the energy recovery wheel will restore latent effectiveness to near original performance.

To clean, gain access to the energy recovery wheel and remove segments. Brush foreign material from the face of the wheel. Wash the segments or small wheels in a 5% solution of non-acid based coil cleaner (such as Acti-Klean, available through Daikin, Stock # AK1) or alkaline detergent and warm water. Soak in the solution until grease and tar deposits are loosened

(Note: some staining of the desiccant may remain and is not harmful to performance).