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VÄRMEBARONEN EP31 300
1. Terminal block, control circuit.
2. Connection of pressure guards/safety equipment.
3. Fused output, 230V~/6A, to external unit.
4. External control voltage 230V~, to the boiler.
5. 'STOP' button. When pressed, it cuts the power supply to
the boiler by tripping the load-break switch.
6. Panel circuit board with overlay.
7. Cable strap, with ferrite terminals, connects power and
panel circuit board.
8. Temperature guard, max temperature relay, STB. One or
two depending on boiler model.
9. Load-break switch with auxiliary switch.
10. Circuit board, for power control of boiler from the
heat pump.
Not connected at delivery!
11. Connection for 3-bit binary 230V~.
”1” is the least significant.
12. Indications, ”A - C”, display the binary number of
stages the heat pump wishes to engage. ”A” corre-
sponds to the lowest power group and ”C” the largest.
13. Power supply to circuit board terminals 1-2.
0-10V signal terminals 3-4.
14. Switch to select whether the boiler is to be controlled
by itself ”EP” or by the heat pump ”VP”.
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15. Circuit board, power.
16. Sense inputs, sense the status of temperature guard and
high pressure guards.
Indicator, on when;
A: circuit board has voltage.
B: temperature guard in operating mode.
C: high pressure guard in operating mode.
17. Sense inputs, sense the status of load-break switch and
low pressure guard (options) status.
Indicator, on when:
A: load-break switch in operating mode.
B: low pressure guard in operating mode, option.
C: no function.
18. Contactor, K1, power group one.
19. Contactor, K2, power group two.
20. Contactor, K3, power group three.
21. Contactor, K4, power group four on fifteen stage boilers.
22. Contactor, K5, power group four on boilers. Doubled con-
tactor power group four, boilers with power
≥
180 kW.
23. Potential-free relay output for circulation pump.
Max. load 230 V~/2 A.
24. Fan(s), option.
25. Potential-free, alternating relay output for buzzer alarm.
26. Outputs for controlling solid state relay, option.
27. Boiler temperature sensor, J12.
28. Temperature sensor, J13, only included in boiler with
cooling fan, option
29. Connection temperature sensor for boiler with secondary
control. Also terminals 3-4 in terminal block J9, option.
30. Feed to circuit board 10, and alternative connection of
temperature sensor with secondary control, option.
31. Connection Pt100 boiler temperature sensor, high tem-
perature boiler, option.
32. Connection Pt100 temperature sensor, secondary control,
high temperature boiler, option.
Boiler with outdoor temperature compensation, UTK
**.
Connection of contact function for alternative heating.
33. Output signal, current power and boiler temperature.
34. Connection for the load guard's current transformers.
35. Connection outdoor temperature sensor, boiler with UTK,
option.
36. Connection for external setpoint setting.
37. Level sensor connection.
38. Connection for external stage control.
39. Connection of current transformer for PEC function.
40. Connection for series control of boilers, option.
Any intervention in the boiler's electrical equipment that requires tools must be carried out under the
supervision of a qualified electrician.
Control circuit
The control voltage is not broken by the load-break switch.
External voltage may occur!
To break the power supply to the boiler, the load-break switch must be placed in 0 position.
Lock the switch!