2 System installation
VARIANTS: DEVICES:
Boiler I/O without heating circuits
(basic module):
1 Boiler heating circuit pump, 1 return flow mixer,
1 boiler pump,
Boiler I/O with 1 heating circuit: 1 supply pump, 1 return flow mixer, 1 DHCW pump, 1 heating circuit pump,
1 heating circuit mixer, 1 analogue or digital room control unit (optional)
Boiler I/O with 2 heating circuits: 1 supply pump, 1 return flow mixer, 1 DHCW pump, 2 heating circuit pumps,
2 heating circuit mixers, 2 analogue or digital room control units (optional)
Heating circuit expansion module (HCM): 1 supply pump, 1 DHCW pump, 2 heating circuit pumps, 2 heating circuit mixers,
2 analogue or digital room control units (optional)
Pump connection: 230 VAC, max. 200 W, speed-controlled output for boiler circuit pump
(suitable for speed control of fixed-speed pumps).
Mixer motor connection: 230 VAC, open/off/closed (three-step)
Outputs: Floating contacts with max. 2 A switched current, 230 VAC
Fault output: Summary fault warning contact (e.g. for remote warning through telephone dialling)
Fault 1: NC contact to indicate faults
Fault 2: NO contact to indicate faults
Power output: NO, configurable for
• Burner operating display ( output stage “partial load / medium load / nominal load”)
• Boiler master-and-slave circuit to request a second boiler
• Automatic grate cleaning
Smoke extractor: NO contact for activating an external smoke extractor.
The boiler is released in this case by the control unit of the external smoke extractor
via External 1 (floating contact).
Inputs: 24 VDC supply to connect floating contacts.
External 1: This is where you connect external safety devices (low water pressure switch,
release ext. smoke extractor, etc.) If this input is not used, it must be short-circuited.
External 2: Multi-function input
• Heat to target2: To request the boiler with the second boiler target temperature
or as a request contact for external third-party control systems (request duration
should be at least 30 minutes).
• Holiday remote control: (Does not function if there is an external boiler request)
Stop switch*: Connect the emergency stop switch here
* Emergency stop switch in accordance with the latest version of prTRVB H 118
Never apply voltage to the inputs!
Always check “External 1” and “External 2” in this regard!
Sensor cable must be at least 1 m in length. Shorter cables absorb water – causing
the sensors to fail. Extend sensor cable with 2 x 0.5 mm²!
MA-Easyfire 10.2008_EN.indd 30MA-Easyfire 10.2008_EN.indd 30 30.03.2009 13:30:00 Uhr30.03.2009 13:30:00 Uhr
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