Process Technology Lufran LUF Series Manual page 58

Maintenance Procedures (Continued):
M10: Safety Contactors
The safety contactors are mounted on the high-voltage section of the electrical panel. Each safety
contactor should be inspected for proper operation every 6 months.
Procedure M10-1: Safety Contactor Inspection Procedure:
1) If the unit is in LOCAL mode, press the HEATER ON/OFF button to the OFF position. If the unit is in
REMOTE mode disable the heater from the customer supplied remote controller. This will also
prevent the heaters from energizing.
2) Turn OFF power to the unit.
Vérifiez que l'alimentation électrique est coupée,
et tous les périphériques de verrouillage /
débranchement nécessaires sont correctement
installés.
3) Continue water flow through the unit for this
procedure. Allow the unit to cool to ambient inlet
temperature.
4) Open the front cabinet door.
5) Using an ohm meter, measure the continuity
across each of the poles of each safety contactor
(ie. L1 to T1, etc).
should measure no continuity (infinite ohms).
6) If continuity is detected across any of the poles of
the safety contactor at this time, when power is
turned off, the contactor must be replaced.
7) Press and hold the test button on the each safety
contactor. With the button depressed, measure
the continuity across each of the poles again. This
time you should measure continuity (low ohms).
8) If no continuity is detected while the button is
depressed, the contactor must be replaced.
M-43-25
Revision - Date 03-01-04-18
With power turned off, you
Verify that the electrical supply is shut off, and any
necessary lockout/tagout devices are properly
installed.
Depress buttons here
Figure 42: Safety Contactor
57
LUF-Series Lufran Manual
Standard outlet, Standard Interface
Front of LUF unit