Breezair RPA 400 - 1500 Series Maintenance Manual - MCS

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2Pre-Season <strong>Maintenance</strong>Remove the cooling pad frames.Turn off the Isolating switch.Replace drain outlet removed at the end of the season maintenance, or close thedrain shut off valve if fitted.Turn on the water supply.Check the float valve assembly for correct operation and setting of water level.Switch on the Isolating switch.Refit the pad frames.Run air conditioner for a period of time, check pads for a uniform saturation of water.Check the bleed off rate and set using the table on page 6 as a guide.Replacing the Filter PadsIf, during your Pre-Season or End of Season maintenance you determine that thecooling pads need replacing, you will be able to purchase replacements from yourlocal <strong>Breezair</strong> Dealer.REPLACING THE PADS IS AS FOLLOWSSwitch off the air conditioner.Remove the cooling pad frames from the air conditioner by turning the black latchat the top of the pads, tilting the pad outwards and lifting.Remove the rivets from the top of the frame, lift off the top frame, the water trayand pad will lift out.Using a high pressure spray nozzle on a garden hose, wash any dirt and saltdeposits from the louvre grille and frames.Place the new pad into the frame and secure as before. When replacing pads withAspen woodwool, ensure that the woodwool is distributed evenly throughout theframe and any protruding strands are pushed back in. Particular attention shouldbe paid to the corners and edges so that air cannot bypass the pad.Spray the assembly with water to rinse any dust or loose material from the frames,then install into air conditioner.Switch the COOL control ‘ON’, and check that the trough in the upper part of thepad is filling, and allowing the water to drain through the holes in the trough.NOTE! New cooling pads can take some time to become conditioned anduniformly saturated when water is first applied. A characteristic odour ofwet timber may be experienced during this period.
3TROUBLESHOOTINGPROBLEM PROBABLE CAUSE SUGGESTED REMEDYInadequate Cooling Insufficient air discharge openings. Make sure adequate openingsInadequate exhaust for area beingare provided to exhaust thecooled, causing high humidity andincoming cool air, open windows,discomfort.doors etc.Undersized air conditioner.Clogged or dirty cooling pads.Ducts blocked or collapsedDry pads or lack of water whilethe air conditioner is operating.Excessive Ambient Humidity.See also top of page.Fan running backwards.Fan running too slow.Belt slipping.Replace with larger model.Clean or replace pads.Repair DuctsCheck water distribution systemfor obstructions. Check pump isoperating.On days during summer when theambient humidity is high, the airconditioner will not work aseffectively as on drier days. Thereis no remedy except to shut thepump off.Reconnect the incoming mainsfor correct rotation.Check motor amps. If belowrating plate specification, adjustmotor pulley to increase fan speed.Tighten belt. Replace belt if worn.Fan fails to start. Circuit breaker tripped or fuse blown. Reset or replace.Overload tripped.Power not turned ONLoose electrical connections.Faulty control switch.Motor burned out.Low supply voltage.Reset.Turn power ONCheck all connections.Replace.Replace.Consult with local Electrical authority.Motor overheats and Incorrect setting on current overloads. Reset overloads to correct setting.stops on overload.Wrong size motor.Fit correct size motor.Fan speed too high.Adjust motor pulley until the motorcurrent is equal or below thatspecified on the motor rating plate.Belt slipping or wearing Belt loose. Tighten belt.excessively.Pulleys out of line.Align pulleys.Worn belts.Worn pulleys.Replace belts.Replace pulleys.Pump fails to operate. Pump motor failure. Replace complete pump.Incorrect wiring of pump.Loose electrical connections.Pump control switch faulty.Correct pump wiring.Tighten connections.Replace pump control switch.
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Page 3: 1REGULAR MAINTENANCE IS ESSENTIAL F

Breezair RPA 400 - 1500 Series Maintenance Manual - MCS

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