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Remeha Celcia MC4 Manual

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5 TECHNICAL SPECIFICATIONS AND WORKING PRINCIPLE
5.1 Technical data
Remeha Celcia MC 4
General
Dimensions (w x h x d) mm 205 x 163 x 53
Weight g approx. 430
Nominal supply voltage VAC / Hz 230 / 50
Rated input VA 4
Safety requirements (household use) - EN 60730-1
EMC interference suppression (immunity) - EN 61000-6-2
EMC interference suppression (emission) - EN 61000-6-3
Maximum ambient temperature (storage and transport) °C - 20 - 70
Maximum ambient temperature (operational situation) °C 0 - 50
Maximum relative humidity (non-condensation) % 10 - 90
Inputs
Outside temperature sensor
1
) - NTC sensor (range 10 – 40 °C)
System flow temperature sensor
2
) - NTC sensor (range 10 – 100 °C)
Outputs
Pump output (live, make contact*) - switching power 230 VAC, 2A max.
Failure relay output (potential free switching contact) - switching power 230 VAC, 2A max.
OpenTherm connections
OpenTherm boiler connections
3
) quantity 4
OpenTherm thermostat connection quantity 1
table 06 Summary of technical data
*) Protect this output externally
1
) Maximum cable length = 100 M (2 x 10 Ω)
2
) Maximum cable length = 25 M (2 x 10 Ω)
3
) Maximum cable length = 50 M (2 x 5 Ω)
5.1.1 Regulator construction
1. Cover
2. Status LED
3. LEDs for failure analysis
4. Connection terminals
5. Configuration button
5.1.2 Working principle
The Celcia MC4 is a regulator for the modulating control of
between 1 and 4 Remeha boilers in cascade, according to the
flow temperature demanded (via the OpenTherm input). With
the exception of the Remeha Selecta, all OpenTherm boilers
in the Remeha range can be controlled by the Celcia MC4.
Please contact our Sales Support department if you wish to
use the Celcia MC4 in combination with older boiler types or
the Gas 210 ECO and Gas 310 ECO. The Celcia MC4 has
a failure relay (the contact switches in the event of a power
failure and/or a failure in the Celcia MC4 or one of the boil-
ers) and also regulates the system pump. The (internal) boiler
pumps are controlled by the boiler control units.
LT.AL.REM.000.021
GB
… 31 …


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