Breezair 400 - 1500 Series Manual de usuario
Breezair RPA 400 - 1500 Series
Maintenance Manual
Table of Contents
PAGE
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3, 4
ITEM
Regular Maintenance is essential for
Maximum Efficiency
End of Season Maintenance
Pre-Season Maintenance
Replacing the Filter Pads
Troubleshooting
REGULAR MAINTENANCE IS ESSENTIAL FOR
MAXIMUM EFFICIENCY
To ensure that your Breezair Evaporative Air Conditioner remains in first class
working condition for many years, it should be thoroughly serviced twice a year.
A service should be performed at the end of the summer season and prior to
the commencement of the next summer season, by an authorised Breezair
Service Agent.
HEALTH REGULATIONS
Please note that some State Regulations require that Evaporative Air Conditioners
used for Commercial purposes are to be serviced at Three ( 3 ) Monthly Intervals.
Owners of Commercial Air Conditioners should contact the Health Authority in their
State for servicing guidelines.
LUBRICATION - ALL MODELS
Bearings on electric motors and water pumps are sealed for life and do not require
lubrication. The same applies to the fan shaft bearings on the RPA400-RPA900.
RPA1000 - RPA1500 fan shafts are fitted with plummer blocks with grease nipples,
lubricate at regular intervals, depending on frequency of use.
End of Season Maintenance
Turn off the water supply.
Remove cooling pad frames.
Turn off the power at the isolating switch inside cabinet, or on the corner pillar.
Hose both sides of the cooling pad frames to remove dust, salts pollen etc.
WARNING! Do not use high water pressure when cleaning Chillcel®pads
-Damage may occur.
If cooling pads are deteriorating replace as required.
Check and clean the water distributor channels.
Empty the water reservoir (tank) through the outlet provided.
Thoroughly clean the reservoir.
Do not replace the outlet. If fitted with a drain shut off valve, leave open.
Ensure that water is not carrying over onto the motor.
Check the fan blades are tight.
Check Pulleys and Belts for wear.
Check alignment and tensioning.
Replace or adjust if necessary.
Switch on Isolating switch and refit pad frames.
1
Pre-Season Maintenance
Remove the cooling pad frames.
Turn off the Isolating switch.
Replace drain outlet removed at the end of the season maintenance, or close the
drain 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 Pads
If, during your Pre-Season or End of Season maintenance you determine that the
cooling pads need replacing, you will be able to purchase replacements from your
local Breezair Dealer.
REPLACING THE PADS IS AS FOLLOWS
Switch off the air conditioner.
Remove the cooling pad frames from the air conditioner by turning the black latch
at 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 tray
and pad will lift out.
Using a high pressure spray nozzle on a garden hose, wash any dirt and salt
deposits from the louvre grille and frames.
Place the new pad into the frame and secure as before. When replacing pads with
Aspen woodwool, ensure that the woodwool is distributed evenly throughout the
frame and any protruding strands are pushed back in. Particular attention should
be 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 the
pad 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 and
uniformly saturated when water is first applied. A characteristic odour of
wet timber may be experienced during this period.
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TROUBLESHOOTING
PROBLEM PROBABLE CAUSE SUGGESTED REMEDY
Inadequate Cooling Insufficient air discharge openings. Make sure adequate openings
Inadequate exhaust for area being are provided to exhaust the
cooled, causing high humidity and incoming cool air, open windows,
discomfort. doors etc.
Undersized air conditioner. Replace with larger model.
Clogged or dirty cooling pads. Clean or replace pads.
Ducts blocked or collapsed Repair Ducts
Dry pads or lack of water while Check water distribution system
the air conditioner is operating. for obstructions. Check pump is
operating.
Excessive Ambient Humidity. On days during summer when the
See also top of page. ambient humidity is high, the air
conditioner will not work as
effectively as on drier days. There
is no remedy except to shut the
pump off.
Fan running backwards. Reconnect the incoming mains
for correct rotation.
Fan running too slow. Check motor amps. If below
rating plate specification, adjust
motor pulley to increase fan speed.
Belt slipping. Tighten belt. Replace belt if worn.
Fan fails to start. Circuit breaker tripped or fuse blown. Reset or replace.
Overload tripped. Reset.
Power not turned ON Turn power ON
Loose electrical connections. Check all connections.
Faulty control switch. Replace.
Motor burned out. Replace.
Low supply voltage. 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 motor
current is equal or below that
specified on the motor rating plate.
Belt slipping or wearing Belt loose. Tighten belt.
excessively.
Pulleys out of line. Align pulleys.
Worn belts. Replace belts.
Worn pulleys. Replace pulleys.
Pump fails to operate. Pump motor failure. Replace complete pump.
Incorrect wiring of pump. Correct pump wiring.
Loose electrical connections. Tighten connections.
Pump control switch faulty. Replace pump control switch.
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PROBLEM PROBABLE CAUSE SUGGESTED REMEDY
Pump runs but does not Insufficient water in tank causing Adjust float level to increase water
circulate water or pads pump to suck air. depth.
lack water.
Pump strainer clogged or dirty. Clean strainer.
Blocked water supply tubing. Clean the tubing.
Blocked water distributor at top Clean out the water trough.
of pad frames.
Continuous overflow of Incorrect float valve adjustment. Adjust float valve.
water
Inlet valve not sealing Replace valve
Noisy air conditioner. Fan rubbing on housing. Reposition fan.
Fan out of balance due to dirt, Clean fan, adjust blades if
bent blade, etc. possible: Replace fan.
Air conditioner delivering more air Adjust any baffles or balance flow
than required. to reduce airflow.
Belt “squelching”. Adjust alignment of motor and
pulleys.
Belt “squealing”. Tighten belt by adjusting motor
platform. Replace belt.
Inadequate sized ducts or grilles. Increase grille sizes.
Loose water distribution connections. Tighten all connections.
Water being thrown into Break in water distribution system. Replace any cracked or broken
the area being cooled. tubing.
Cooling pads not properly installed Ensure cooling pads are correctly
into pad frames, or sagging. installed.
Old cooling pads have developed Replace with new cooling pads.
‘thin’ spots.
Cooling pad fibre sticking through netting Remove any fibres protruding
causing water to be sucked off pad. through netting.
Too much water to pads. Check Restrictor Tap setting.
Unpleasant odor. Air-conditioner located near the source Relocate the Air-conditioner or
of unpleasant odor. remove the odor source.
New Pads fitted Will go after short time.
Algae in tank water. Drain tank and clean thoroughly, fill
with fresh water and install new pads.
Pad remains wet after shutdown. Allow fan to run for a further 10
minutes after pump has been shut
off.
Formation of white High mineral content in water supply. Increase the bleed rate.
deposits in tank and
on pads.
Information extracted from Booklet 601540/h.
TROUBLESHOOTING (Cont.)
4
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