Anti-condensation heater connections
Do not run the electric machine when the anti-condensation heater is in use.
Water condensing inside the electric machine enclosure can result in failure or corrosion of the
machine. This often happens in cooler temperatures or higher humidity areas typically in marine
environment, when the machine is not running.
The electric machine can be equipped with anti-condensation heater to avoid condensation
issues. The heater (+HEAT1) or heaters (+HEAT2) are factory assembled see Figure Heater
connector locations . The installed heater may not be used when the machine mains are switched
on, and the machine is running.
The installed anti condensation-heater must be supplied with 230 Vac power. The heater
connector is inside the connection box, in the lower part if it. The anti-condensation heater cable
has an inlet (cable gland) next to the low voltage signal connector. See Figure below.
Figure 35. Anti-condensation heater connector
1
Anti-condensation heater connector (inside the connection box).
2
Inlet and cable gland for the anti condensation heater cable.
After installation of the machine, and any time when needed, the resistance of the warming
element can be measured. Connect the measurement device between the heater terminals. The
resistance shall be around 1 kΩ. Measuring no value, or zero value indicates a possible failure in
the heater element.
If the electric machine has an anti-condensation heater and failure is suspected, contact
Danfoss representative.
EM-PMI540-T1500
6. Installation
| BC265856800806en-000106
©
Danfoss | Produced By: Danfoss Power Solutions | January 2019 | 45
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