Kaukora FIL-SPL, User Manual

Page: 13 / 53

5. Electrical connections
General
All electrical equipment, except the current sensors are connected and tested at the factory. Internal
connections must never be changed.

Sensor cables to external connections must not be laid closer than 20 cm to high voltage cables

Models up to 300 kW have 5-wire system for main supply

Models from 400 to 1600 kW have 4 wire system for main supply and are equipped with integrated
control voltage transformer

Models from 120 kW have integrated dry-boiling preventer

With models of 31.5 to 300 kW, the main supply can be routed either through a floor drain from
the base of the boiler or as a surface installation through the flanged ports on the sides of the
boiler

With models from 400 to 1600 kW the main supply is to be routed on the top of the boiler

The boiler is to be permanently connected to main supply

See recommended fuse sizes etc. from Technical data, Electrical properties of FIL-SPL boilers
Note! Electrical installation and service must be carried out under the supervision of a qualified electrician.
Cut the current with the main switch before carrying out any servicing. Electrical installation and wiring
must be carried out in accordance with the regulations in force.
Main switch
The FIL-SPL boiler has integrated main switch. The main switch operates as an isolator switch if
temperature limiter or dry-boiling preventer detects an error or in case of overload.
Note! The main switch must not be moved to "I" (on) until the system has been filled with water and water
circulation is ensured. Otherwise the temperature limiter, thermostat and the immersion heater etc. can be
damaged.
Note! After the main switch has tripped, ensure that the main switch is reset by first positioning the switch
to “0” (off) and then back to “I” (on) position.
Control voltage switch
The control voltage switch is for enabling the control voltage for control unit.
Heating mode selection switch
The heating mode selection switch is for selecting whether normal heating mode or backup heating mode
is used. If the heating mode selection switch is on “0” (off) position, the boiler is in disable state.
Note! In backup heating mode only part of the power is available.
External control selection switch
The external control selection switch is used to select whether the boiler is operating independently or is
there some external control used to enable heating, e.g. command from heat pump. If the external control
mode selection switch is on “0” (off) position, the boiler operates independently.
Fuse for control
There is own fuse for control. The fuse is common to control unit and other controlling components such as
temperature limiter, relay controls and backup heating thermostat.