6
ELECTRIC ASSEMBLY
BOILER START-UP
Connection to the electrical system needs to be done in accordance with the regulations applicable in the
country where the given boiler is installed, and therefore must be done by qualified electrician (electrical
company installing the boiler puts a relevant stamp on the guarantee card). Heaters with powers from 4 to
24 kW are designed by an alternating current, 3-phase (400V3N~50Hz). 4, 6 and 9 kW versions are also
available in 1-phase (230V1N~50Hz). In case 400V work is essential one should protrude bridge out of L
1
L
2
L
3
clamp bar. Boilers AsZN-W, AsD-W and AsDC-W are equipped in TLZ terminal strip. AsB II boiler is equipped
in switch disconnector. For this terminal strip one should connect power supply in accordance to L
1
L
2
L
3
N PE
description. The technical data table (page 7) provides information on the cross-section of the power cord to
be used for boiler connection and the applicable power (A) of the main fuses protecting the boiler.
Boiler EKW should be connected to the electric installation by a device enabling full power disconnection. It is also
required to use residual current device (in case house installation lacks such).
A – Connection strip
1 – HUW measuring sensor
– concerns AsD-W boiler (no. 24)
0 VOLT !!!
ESC
ON
OFF
RELAYS
Sensors
ELTERM
Body. BALL. CH. HUW. ROOM WEATH
EKW BOILER START-UP
2 – room sensor ELTERM (optional)
– clamps (no. 22)
3 – „weather” sensor (no. 23)
4 – external room temperature controller, recommended
ELTERM’s „ThermLine RT” (no. 6)
Sensors
EXTERNAL
REGULATORS
6
5
4
3
2
1
THERMOSTATE
6
B – „weather” sensor connection
Weather sensor no. 25 we do connect to boiler using 2-strand wire.
We connect it to the boiler by no. 23 strip, on weather sensor by no.
25A strip – connection order is irrelevant (2-strand wire is not
included to the boiler).
23
22
24
25 A
- weather
sensor
26 A
- room
sensor
C – room sensor connection (optional)
Weather sensor no. 26 we do connect to boiler using 2-strand wire.
We connect it to the boiler by no. 22 strip, on weather sensor by no.
26A strip – connection order is irrelevant (2-strand wire is not
included to the boiler).
ATTENTION:
Room and weather sensors are universal and exchangeable. One should remember about proper connection according
to points B and C above.
