ADJUSTABLE MOTOR BASE (BELT DRIVEN UNITS)
The motor base adjusting screw (see figure below) should be coated every six months using a good quality
corrosion inhibiting grease, such as one of those recommended for lubricating the fan shaft bearings.
Adjustable motor base
1.
Motor base adjusting screws
2.
Adjustable motor base
3.
Locking nuts
Cleaning procedures
MECHANICAL CLEANING
Keeping your evaporative cooling equipment (and the associated system) clean will maintain its efficiency and
help to prevent uncontrolled bacteriological growth. The recommended cleaning procedures are described below:
1. Disconnect fan and pump motor(s) and shut off make-up supply.
2. Remove combined inlet shields, eliminators and drain system. Do not remove sump strainer.
3. Clean debris from exterior and fan(s) with soft brush, if necessary use water and soap.
4. Clean interior with (soap) water and soft brush, if necessary use high pressure water jet.
5. Remove any debris from water distribution system and clean any nozzles if clogged. If necessary nozzle and
grommet may be removed for cleaning.
6. Remove debris from heat transfer section (fill). Do not use steam or high pressure water to clean cooling tower
wet deck surface.
7. Flush with clean water and drain to remove accumulated dirt.
8. Remove, clean and replace sump strainer(s).
9. Clean debris from combined inlet shields and eliminators with water jet and install.
10. Remove debris from access doors and panels with soft brush and (soap) water.
11. Close drain and open make-up supply. Fill system up to overflow level with clean water.
DISINFECTION
Disinfection of your cooling system may be needed in case of high concentration of aerobic bacteria and/or
Legionella. Disinfection is also recommended for evaporative cooling systems with known or suspected high
bacteriological levels, prior to a cleaning procedure.
Some local or national guidance also recommends disinfection prior to initial start up, after a prolonged shut down,
after routine cleaning operations or when significant alterations have been made to the cooling system.
Disinfection must be carried out in accordance with a proper procedure and take into account the safety of the
cleaning and disinfection staff.
Typically disinfection is achieved using a sodium hyper chloride solution to maintain a residual value of 5 - 15 mg/l
of free chlorine and circulate this around the system for up to 6 hours. Higher chlorine levels for a shorter period are
possible, but require a higher level of corrosion protection than galvanized steel only. Consult your BAC Balticare
representative for further information.
Excessive levels of chlorine must be avoided as this quickly can lead to corrosion and damage to your system.
Chlorinated water should be de-chlorinated before draining and after disinfection the system must be thoroughly
flushed through with clean water.
W W W . B A L T I M O R E A I R C O I L . E U
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5 Maintenance Procedures
5 Maintenance Procedures
