Sawotec NIMC-105N, User Manual, Page: 15 / 36

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2.2.2 Electrical Wiring and Installation
• Only a certified electrician must do the installation of the Combi Heater to ensure safety and reliability.
• Installation should be done according to applicable local regulations to ensure safety and reliability of
electrical connections. Wrong electrical connection can cause electric shock or fire.
• The connection cable insulation must be of rubber type, HO7RN-F, or its equivalent.
NOTE: Using a PVC-insulated wire as connection cable for the Combi Heater
is not allowed because this material easily becomes brittle when subjected to heat.
• Refer to the external Control Unit Manual for its installation and connection to the Combi
Heater as well as the installation of the Temperature Sensors.
NOTE: An additional Contactor Unit is needed for 10.5kW, 12.0kW, 15.0kW and 18.0kW Combi
Heaters.
2.2.3 Installation of External Control Unit and Sensor
• The Safety Temperature Sensor must be installed directly above the heater, 15cm below the
ceiling. Refer to Figure 7.
2.2.4 Sensor Location
When doing a final inspection for the electrical installation of the Combi Heater, a
“leakage” may be detected when measuring the insulation resistance. This is because the
insulating material of the heating resistors has absorbed moisture from the air (during
transport and storage). The moisture will eventually be removed after several uses of the
heater.
NOTE: An additional Contactor Unit is needed for 10.5kW, 12.0kW, 15.0kW and 18.0kW
Combi Heaters.
2.2.5 Effect of Moisture During Transport and Storage
•