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Page 40 IM Easyfire 10/2008 © KWB – Kraft und Wärme aus Biomasse GmbH
2 System installation 2 System installation
2.1.11.6 Plug-in module 1
(suction conveyor system, second boiler, heating circuit 0)
A hardware plug-in module is installed in the terminal box for extended functionality, which is required for example,
for a suction conveyor unit, second boiler switchover, or an additional single heating circuit. This module can be
configured for multiple functions and can be used individually or combined for multiple functions depending on the
system type. The system detects available hardware automatically. You must set the desired use in the “Basic
settings/hardware”, as specified in the installation / service manual.
Comply with the following for second boiler switchover: Connection of the second boiler thermostat ( overheating
protection thermostat) is OPTIONAL. If the thermostat is not connected the overheating protective function is
triggered by the second boiler sensor when the set value is exceeded (preset is 80 °C). In this case the flue gas
thermostat should only be connected if both boilers use the same chimney. The hydraulic circuit of a second boiler
(log wood boiler) is executed in accordance with diagram no. MBEH0005 in section 17.
2.1.11.6.1 Suction conveyor system and / or second boiler switchover
The options “Suction” for the suction conveyor unit (system type GS or GL) and “SB” for automatic switchover
between a manually charged second boiler and the pellet boiler can be configured independently or jointly. Use this
setting to assign use of the respective outputs/ inputs.
See the included connection diagram no. EBAA1026 for pin assignment and the associated cabling.
Because the cable lengths for suction conveyor units (types GS, GL) between the 6-pole Wieland plug-type connector
(marked “FE GS-GL”) attached to the rear of the boiler and the fuel extractor drive, can vary greatly depending on
the constructional situation, this connection must be established by the customer with 3 poles in accordance with
diagram EBGA1027 in section 17. For extractor type GL the winding protection of the fuel extractor motor (Klixon)
must be bypassed in the Wieland plug-type connector.
2.1.11.6.2 Heating circuit 0 and / or second boiler switchover
The options “HC0-2” for use of a single heating circuit (heating circuit 0) and “SB” for an automatic switchover
between a manually charged second boiler and the pellet boiler can be configured independently or jointly. With
this setting the use of the respective outputs/inputs is assigned. Configuration-specific assignment and associated
cabling must be executed in accordance with electrical diagram EBAA1021 section 17.
2.1.11.7 Boiler master-and-slave circuit
The power output can be configured as request contact for a slave boiler. If the function is activated in the “Basic
settings/ outputs” as described in the installation / service manual, then the power output (ST 7) of the master boiler
must be connected with the input “EXTERNAL 1” (plug-type connector 22) of the slave boiler, as shown in hydraulic
diagram MBEH0009 (section 7) (cable 2 x 0.5 mm²).
2.1.11.8 External smoke extractor
Activation of an external smoke extractor can be executed via plug-type connector no.: 7.4 (NC contact) of the
I/O board. The cabling is shown in diagram EBAA1019. The system is released by the control unit of the external
smoke extractor via external 1 (floating contact).
2.1.11.9 Stop switch
The system must be capable of being switched off via an escape switch (stop switch installed outside of the
boiler room). Connect the escape switch on plug-type connector 44. Cabling diagram EBAA1044, section 17
MA-Easyfire 10.2008_EN.indd 40 MA-Easyfire 10.2008_EN.indd 40 30.03.2009 13:30:05 Uhr 30.03.2009 13:30:05 Uhr