Technical data

10
Boiler control
The Remeha Quinta Range can be controlled
using one of the following methods
Modulating (two wire control)
When using the optional Remeha
compensating controllers the heat output
modulates between the minimum and maximum
value on the basis of the boiler flow
temperature sensor. This applies to both single
and multiple boiler installations, under the
dictates of a room and/or outside
temperature sensor.
Celcia 20 - Optimising room/outside weather
compensating control for single boiler. Control is
supplied as standard for room compensation. For
outside weather compensation the optional o/s
sensor must be installed and connected. Control
communicating with the boiler directly via two
wire interface.
Celcia MC4 - In conjunction with Celcia 20 can
provide step control for multi boiler installation
of up to four boilers.
Analog control (0-10 volt d.c.)
The heat output modulates between the
minimum and the maximum values on the basis
of the voltage supplied by an external analog (0-
10V) input.
- Temperature based (20 to 90°C). To set the
ratio between voltage and the desired flow
temperature, see the graph below.
- Output based - fixed parameters (18 to 100%),
see the graph below.
0 volt = boiler off
0.5 - 1.8 volt = heat input 18%
1.8 volt - 10 volt = boiler modulates between 18
and 100% on demand.
On/off control (1 x no volt switched pair)
The heat output modulates between the
minimum and the maximum value based on the
set flow temperature.
High/low control (2 x no volt switched pairs)
The heat output is controlled between part load
(18% adjustable) and full load, by means of a
two-stage controller.
Quinta Brochure July 09 Issue 6 16/7/09 12:30 Page 10