Thermon TraceNet TCM 18 - Manual (Page 59)

13
Maintenance
Preventative maintenance consists of inspection, testing, checking connections, and
general cleaning of equipment at scheduled intervals. The maintenance recommen-
dations that follow are intended to support and in some cases “add to” those pro-
cedures detailed in the facility’s Planned Maintenance System (PMS). In case of
conflicts, contact the project engineer for resolution. When carrying out the sched-
uled maintenance program, the following safety precautions should be observed.
Safety Precautions
The heat tracing can be powered by the project specified nominal voltages ranging
from 100 to 600 Vac. It is important that only authorized trained personnel conduct
these maintenance and service activities. Before conducting any maintenance or
service procedure, exercise required lockout and tag out procedures at the appro-
priate circuit breakers. Additionally, do additional testing within the control panel
to ensure that the specific heat tracing and control circuit of interest is fully de-
energized and the equipment is grounded.
If it becomes necessary to service or test live equipment, the following instructions
must be followed:
• Use one hand when servicing the equipment. Accidental death or severe
injury may occur especially if a current path is created through the body
from one hand to the other.
• First, de-energize the equipment. To de-energize any capacitors connected
into the circuits, temporarily ground the terminals where work is to be done.
• Connect the multi-meter/instrument to the terminals of interest using a range
higher than the expected. Make sure that you are not grounded whenever a
need arises to adjust equipment or test circuit operation. Verify that all test
equipment used is properly maintained and safe for the intended use.
• Without touching the multi-meter/instrument energize the equipment and
read the values indicated on the multi-meter/instrument.
• Remove the test leads after de-energizing the circuit of interest.
55 PN 50316_0514