Electrical installation
NOTE
Electrical installation and service must be carried out
under the supervision of a qualified electrician. Elec-
trical installation and wiring must be carried out in
accordance with the stipulations in force.
Connection
■
If an insulation test is to be carried out in the building,
disconnect the boiler.
■
If the building is equipped with an earth-fault breaker,
EVC 13 should be equipped with a separate one.
■
Connect the boiler on terminal block (9) to 400 V 3-
phase, neutral + ground via an electrical distribution unit
with fuses.
■
EVC 13 does not include an omnipolar circuit breaker
on the incoming power supply. The installation must be
preceded by a circuit breaker with at least a 3 mm gap.
■
Connection must not be carried out without the permis-
sion of the electricity supplier and must occur under the
supervision of a qualified electrician.
Select max. output using the power limiter, see section ・
Power control immersion heater" on page 18. The installer
must document the selected output. The factory setting
for the power limit is 9.0 kW.
All electrical equipment, except for the outdoor sensor
and current sensor, come already connected internally.
Connecting outdoor temperature sensors is described in
section "Outside sensor" on page 19
The boiler is equipped with load monitor, prepared for
centralised load control and has equipment for tariff con-
trol of electric water heater as an option.
Cable entry
Cable entry is at the rear or top of the boiler, see section
".Component positions" on page 25.
Switch
■
Mode "0"
The boiler is completely switched off, heating not avail-
able.
NOTE
Terminal block (26) is supplied with power.
■
Mode "1"
Only clock and any tariff control of water heaters run-
ning.
■
Mode "2"
Normal operating mode. As mode”1” but with clock,
immersion heater, automatic controls and circulation
pump connected.
■
Mode "3"
Emergency mode. This mode can be used temporarily if
something in the automatic controls does not work. The
boiler/supply temperature is then governed by the max
thermostat. Pump and immersion heater (limited to 6
kW) are in operation. Any connected water heater is
supplied with power.
NOTE
Check that the max thermostat is not set too high.
This is particularly important if there is an under floor
heating system.
NOTE
The power switch must not be turned from ”0” before
the boiler has been filled with water. Otherwise, the
temperature limiter, thermostat, thermometer and
the immersion heater could be damaged.
17EVC 13
English
Electrical installation
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