28
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10.
LEGIONNAIRES DISEASE: Evaporative air conditioners have not been implicated in any outbreak of Legionnaires
disease, although Legionella bacteria have been found in such systems. The water temperature in the evaporative
air cooler section is normally at about 18°C at which temperature the Legionella bacteria (if present) will remain
dormant and cannot multiply.
The following maintenance schedule is required to be followed in order to comply with the New South Wales Public
Health Act 1991 section 46:-
a).
Sumps are to be drained and cleaned at three monthly intervals or more frequently if necessary.
b).
Wetted pads are to be drained and cleaned at three monthly intervals or more frequently if necessary.
c).
Water strainers are to be cleaned at three monthly intervals or more frequently if necessary.
d).
If any air filter is fitted, it is to be cleaned or replaced when necessary.
6.2 MAJOR SERVICE/COMPONENT REPLACEMENT PROCESS
6.2.1 Electrical Components
6.2.1.1 Electrical Wiring
The electrical wiring of the unit should be visually inspected every 6 months and pre-season to ensure that it is free
from damage. If visible damage is noted, all damaged wiring should be replaced with reference to the wiring diagrams
found in Appendix
X
.
The following are the recommended steps for replacing damaged electrical wiring.
1. Electrically isolate unit
2. Remove control box cover
3. Inspect electrical wiring for damage
4. Remove damaged wiring and replace.
5. Replace control box cover and test unit operation
6.2.1.2 Isolator Fitted and Operational
Check that the isolator is present and free from damage. Isolate unit and confirm that power is not available at the unit.
6.2.1.3 Single or 3 Phase Power Test
A qualified electrician is to test the incoming power supply to the unit. The supply is to be tagged with available voltage
and date of test.
6.2.1.4 Fan and Motor (When fitted as part of Appliance)
Motors range in weight from approximately 20 to 270Kg’s. Generally the larger the unit the larger the motor. Refer to
technical data sheet or contact Seeley International with the units serial number to identify which motor you have. The
use of a lifting apparatus and/or several service personnel may be required for heaver motors.
Tools Required: Metric open end ring spanner set, Drive belt tensioning gauge, Pry bar or lever bar, ½” Socket set,
metric hex key set, nylon hammer
1. Electrically isolate unit.
2. Disconnect Blower motor.
3.
Loosen motor platform and jacking bolts if fitted.
4.
Slacken and remove drive belt/s.
5.
Extend motor platform fully to gain access to motor mount bolts.
6.
Removed motor mount nuts/bolts (The rear bolts may remain in place).
7. Check motor weight on name plate and use appropriate lifting equipment if necessary.
8. Remove motor.
9. Replace motor in reverse order.
10.
To tighten belts, use prybar to assist in lifting motor into place whist tightening locking bolts. Larger motors will have
jacking bolts in the motor platform to hold the weight of the motor. Adjust these to the required length to achieve
correct belt tension.
Note:
a). Bolt tensions should be in accordance with bolt manufacturer’s recommendations for the bolt diameter, thread
type and material. All mount bolts should be high tensile and a minimum grade of 8.8. Anti-seize should be
used on all stainless steel bolts.
b). Belt Tensioner recommended when replacing/re-installing belts.
MAINTENANCE
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