Mokon Duratherm - Electrical Preventative Maintenance

9
Electrical Preventative Maintenance
Weekly Checks
Corrective Procedures
Check electrical box interior components
for any discoloration, or any burn marks
Correct component wiring
Verify voltage and frequency stamped on
system matches customer supply voltage
and frequency
Correct excessive system load (current
draw)
Verify customer supply voltage is balanced
and fluctuations are within 15% of nominal
Verify wire gauge for main power hookup
is properly sized
Replace components if needed
Check for blown fuses
Replace with the correct size and style fuse
For units with solid state contactors,
inspect the screen covering the fan inside
the electrical enclosure
If clogged with debris, clean or replace the
screen. If not cleaned or replaced
excessive heat build-up can occur in the
electrical enclosure reducing component
life and wiring. System warranty will be
void.
Monthly Checks
Corrective Procedures
Check that the high temperature switch
(TS) has a set of N.O. and N.C. contacts,
and it is properly wired
Replace the switch if necessary
Check that the low pressure switch (PS)
has a set of N.O. and N.C. contacts, and it
is properly wired
Replace the switch if necessary
Every 3 Months Checks
Corrective Procedures
Check that the interior electrical and
mechanical components are securely
fastened to the back panel, and/or to the
sides of the electrical box
Tighten with proper tooling
Check that the ratings of overload
protection (such as fuses and circuit
breakers) adequately protect the line's
maximum current carrying capacity
Inspect/replace fuses
Inspect/replace motor starter overloads
Check the fuses against the electrical
schematic for proper size according to the
systems voltage
Replace if different
Slightly tug on each wire / conductor to
make sure it makes a solid contact to its
attached component. Pay close attention to
the green grounding wires.
Tighten with proper tooling