JEVI A/S
IOM 08099900
EN, DE, NL
03-2023
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20
9.0 Maintenance instructions
The one-year service interval only applies if the heater is installed in a dry and clean en-
vironment. If installed in environment which does not meet these requirements, the ser-
vice intervals might have to be reduced.
The responsible for the maintenance must ensure that his employees are fully trained
and supervised in the proper working procedures to ensure their safety.
1. Check the ceramic insulators on the elements for damage.
2. Check the insulation resistance of the heating elements. Connect the Megger to an
earth bolt and one of the phases U1, V1 or W1. If the measured value is less than 2
MΩ, each heating element will
have to be checked separately. Minimum value is 2
MΩ
at 1000 V.
3. Cleaning all surfaces.
4. Salt crystals, carbon or calcium layers must be removed from the sheath of the heat-
ing elements by means of a non-metal tool, e.g. wood.
5. Ensure terminations are securely connected to the terminals or bus bars. Heating ele-
ment connections are to be tightened properly.
6. Check the functioning of the space heater in the junction box (if there is one incorpo-
rated). The space heater is fitted with an integrated thermostat situated inside the
connection cable, which is factory set to frost guard temperatures. The space heater
is maintenance free. If the heater does not function; it will have to be replaced.
NOTICE
If the insulation resistance has changed as a result of im-
proper or prolonged storage, it is recommended:
a) To open the junction box in a dry area and let the ele-
ment-connections dry-out using a hot air blower.
(Note: air < 80°C).
b) Run the heater at a lower voltage until all moisture is
evaporated and the insulation resistance has reached its de-
sired value.