Installation and Maintenance Manual
28
Monthly Maintenance Schedules
A washable bag filter is provided by Air Change as factory-fitted standard. New filters can be
supplied by Air Change if required.
Filters should be inspected frequently immediately after installation to confirm the frequency of
cleaning needed for the particular location. Regular change/clean of filters is necessary to ensure
normal operating conditions.
The filters should be cleaned monthly and the filter media should be replaced every 12 months.
Three
‐
Monthly Checks
Repeat the Monthly Schedule.
Clean Heat Exchanger (see page 27).
Check the blower wheels for dirt build
‐
up and tightness on shaft.
Check all cabinet panels for correct fitting, alignment and seals, and clean cabinet as required.
Ensure no insulation has been detached from panels.
Check for signs of excessive vibration on fans.
All electrical terminals should be checked for tension on each maintenance visit with main switch
off.
Clear coils of obstructions or dirt.
Clean condensate drain trays.
Annual Maintenance
Repeat monthly and three
‐
monthly checks.
Apply grease into fan bearings through greasing points (only applicable for pillow block bearings).
Connect service gauges and record operating pressures and mode.
Test the superheat setting by placing a thermocouple at suction outlet and subtract the temperature
from the suction temperature at the compressor. A reading between 4°C to 11°C is acceptable.
Check the cabinet for any paint chips or abrasions and treat accordingly.
Measure and record the amperage of each motor against nameplate details.
Record voltages between phases and amperage at each phase.
Check the VSD fan for any build-up of dust. Remove the fan and clean it by blowing out the VSD
casing. Refit the fan.
Check the VSD fault history and record any faults on the maintenance report. Take action on any
and all faults.
Cooke Industries - Phone: +64 9 579 2185 Email: [email protected] Web: www.cookeindustries.co.nz