Bartec PBTC-300, Operation And Installation Manual

Page: 40 / 52

Operation and Installation Manual PBTC-300
21-54C3-7D0002/-
01/2022-EHT-441169
Notice: Technical data subject to change without notice.
No claims for damage arising from alternations, errors or misprints shall be allowed.
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10 Commissioning
The thermostat module may only be commissioned by qualified personnel in accordance with their qualifications.
Before carrying out further work on the system or on the junction box with thermostat module, it must be ensured that

The end seal is installed

The maximum permissible heating circuit length is observed

The installation is carried out according to the system design
For commissioning, an insulation resistance measurement must be carried out and a functional test must be performed. Finally, it
must be checked that the acceptance test has been carried out and that the acceptance protocol has been completed.
Insulation resistance measurement of the heating circuit
WARNING
Fire and electric shock hazard!
If the insulation resistance value is not sufficient, there is a risk of injury from fire and electric current
Perform insulation resistance measurement carefully!
Repair the heating circuit if insulation resistance measurement produces unexpected results!
NOTICE
The insulation resistance measurement is recommended at certain stages:

Preliminary test (on the reel, before installation of the trace heater on the construction site)

Acceptance test (after installation of the heating circuit and before installation of the thermal insulation)

Final inspection (immediately after completion of work on the thermal insulation)

Upon commissioning

Before switching on the installation
The insulation resistance measurement serves as a test method to determine whether the heating cable is free of damage and to
eliminate possible installation errors on connections and joints.
Preparation of the measurement:

De-energize the heating circuit.

Disconnect the thermostat or controller, if installed.

Disconnect the bus wires and PE wires from the terminal block, if installed.

For the measurement you will need a megohmmeter with, at least, a minimum testing voltage of 500 Vdc and a maximum testing
voltage of 2500 Vdc.
Test 1 - Conducting the measurement between the bus wires and the grounding braid:

Set the test voltage to 0 Vdc.

Connect the negative (-) lead to the grounding braid of the trace heater.

Connect the positive (+) lead to both trace heater bus wires simultaneously.

Turn on the megohmmeter and set the voltage to 500 Vdc.

Apply the voltage for 1 minute. The meter reading should stabilize. Rapid changes in the reading indicate a breakdown of the in-
sulation.

Record the insulation resistance value in the Inspection Record.

Repeat the measurement at 1000 and 2500 Vdc.
Test 2 - Conducting the measurement between the grounding braid and PE:

Repeat the measurement between the grounding braid and PE (again, at 500, 1000 and 2500 Vdc).