Bms Analog Control (0-10 Volt Dc); 4-Stage Control; Switched Pairs - REMEHA 610 ECO Technical Information

rematic modulating (multiple) boilers controller
®
rematic 2945 C3 K - An optimising/ weather-compen-
®
sated boiler control for one or multiple Gas 610 ECO
boilers (up to a max of 4 Gas 610 ECO boilers). This
compensator can regulate each boiler module output
against outside weather conditions, and provide time
and temperature control over the DHW. The compensa-
tor is mounted in one of the boiler modules and is inter-
faced to communicate with the boiler module's control
units via the supplied adapter. On site connection of the
supplied outside and common flow sensors complete
the installation. Set the x value of the boiler control
operation parameter A to 1.
Note: Please refer to the relevant control leaflet for opti-
mising/ compensation settings.

8.6.3 BMS Analog control (0-10 Volt DC)

Input resistance R = 66 kW.
in
The heat output modulates between the minimum and
the maximum value on the basis of the voltage supplied
by an external analog (0-10V) input. To control the boiler
module with an analog signal, the signal for each boiler
module, has to be connected on terminals 35 (+) and 36
(-) of the terminal strip in the instrument panels.
g
Important!!!
When analog control is selected,
the on/off-contact and the high/low-contact have higher
priority (e.g. frost protection).
Temperature based (20 to 90 °C) set the x value of
the boiler control operation parameter A to 4. To set
the ratio between voltage and the desired flow tempera-
ture (see par. 13.2.5 and fig. 20).
0 to 0.9 Volt = boiler off
1 Volt = Flow temperature set point 10 °
8 Volts = Flow temperature set point 80 °
fig. 20 Temperature control via analog (0-10 Volt)
signal
04.31H.79.00006 (fig. 1)
Output based - fixed parameters (30 to 100%), Set the
x value of the boiler control setting parameter A to 5
(see fig. 21).
- 0 to 1.9 Volts
- 2 Volt - 10 Volt
fig. 21 Output control via analog (0-10 Volt) signal
04.61H.79.00001 (fig. 2)
8.6.4 2-stage control (on/off) using 2 x no volt swit-
ched pairs
The heat output of each boiler module modulates
between the minimum and the maximum value based
on the set flow temperature, terminal connections X29-9
and X29-10.
Set the x value of each boiler control operation param-
eter A to 3 (on/ off control).
8.6.5 4-stage control (high low) using 4 x no volt

switched pairs

The heat output is controlled between part load (50%,
adjustable) and full load, by means of a 4-stage con-
troller, terminal connections X29-9 and X29-10 low fire
- X29-7 and X29-8 high
Set the x value of each boiler control operation param-
eter A to 2.
The output percentage on which the boiler module runs
on low fire, can be adjusted with parameter 4 (low fire
start point as percentage) in the setting mode. The 'high
fire' percentage is dependent of the maximal adjusted
output, see setting mode, parameter 6 (maximum out-
put). During this 'high' state modulation on adjusted flow
temperature is released.
27
= boiler off
= boiler modulates between 30
and 100% on demand.
fire.