Control And Electrical Connections; General; Boiler Control; Modulating Controls General - REMEHA GAS 210-80 ECO PRO Technical Information

8. Control and electrical connections

8. Control and electrical connections

8.1 General

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The boiler is equipped with electronic control and safety equip-
ment with ionisation flame protection. The advanced boiler control
(abc ), is a microprocessor that protects and controls the boiler .
®
The boiler is fully prewired; all external connections are made
on the terminal strips. Connect the boiler to the mains supply in
accordance with the local electricity supplier's instructions and IEE
regulations.

8.1.1 Boiler control

The heat output of the Remeha Gas 210 ECO PRO can be con-
trolled as follows:
- Modulating, where the output modulates between the minimum
and maximum values on the basis of the flow temperature
defined by the modulating controller.
- On/off control, where the heat output modulates between
the minimum and maximum values on the basis of the flow
temperature set in the unit. This can be combined with an
outside sensor so that the internal heating curve is used.
- Analogue control (0-10 V), where the heat output or
temperature is controlled by a 0-10 V signal, see Section 8.4.4.
Only possible with optional 0 - 10 V control PCB (IF-01).

8.1.2 Modulating controls general

The modulating nature of the boiler is used to maximum ef fect with
a modulating controller based on room and/or outside tempera-
tures. If the controller demands heat, the boiler supplies the heat
output. If the controller demands a flow temperature, the boiler
modulates to this value. This increases the number of operating
hours and drastically reduces the number of starts. Combined with
the fixed gas/air mixture, this results in greater ef ficiency.
Various types of modulating controls can be connected, including
the following:
- Modulating room control, see Section 8.1.3;
- Modulating weather-compensated control see Section 8.1.4;
- Modulating cascade control, see Section 8.1.5.

8.1.3 Modulating room control

The boiler is set up for communication via the OpenTherm pro-
tocol. Modulating controllers can be connected according to the
OpenTherm protocol, e.g. the Remeha Celcia 20. The controller is
mounted in a reference area. Connection is made with a two-core
cable to the On/off - OT terminals of terminal strip X6 (not polarity
sensitive).
8.1.4 Modulating weather-compensated control
®
rematic
The following optional controller can be supplied by Broag-Reme-
ha. The controller is supplied with a connection adapter and inter-
face that are built into the boiler . The connections for this feature
are fully pre-wired.
GAS 210 ECO PRO
114494-190310