BOILER
CONTROLS
The Gas 310/610 Eco Pro boilers can be controlled using one of the following methods:
Note: This applies to each module on the Gas 610 Eco Pro.
ON/OFF CONTROL
GAS 310 ECO PRO
(One x NO VOLT FREE SWITCHED PAIR)
The heat output modulates between the minimum and the
maximum value based on the set flow temperature, connected
to ON/OFF – OT on PCU-06.
GAS 610 ECO PRO (TWO SETS)
(Two x NO VOLT FREE SWITCHED PAIR)
The heat output modulates between the minimum and the
maximum value based on the set flow temperature, connected
to ON/OFF – OT on PCU-06.
MODULATING
Fully modulating, where the output modulates between
the minimum and maximum value on the basis of the flow
temperature defined by the modulating controller.
Note: When using on/off control the boiler will also modulate to maintain
the flow temp set point.
•
Analogue control (0-10 volts), where the heat output or
temperature is controlled by a 0-10 volt signal.
•
ON/OFF control, (one volt free relay) where the heat output
modulates between the minimum and maximum value on
the basis of the flow temperature set in the boiler. In all cases,
modulation is based on the required flow temperature and
there is a
∆
t dependent output control with the following
characteristic. Up to a
∆
t of 10 to 30ºC (factory setting,
parameter P45) the boiler operates at full capacity. Between
∆
t
full load and
∆
t part load the output reduces in linear fashion.
MODULATING CONTROLS GENERAL
(TWO WIRE CONTROL)
To make full use of the boiler’s modulating feature, iSense
controls can be connected. These controls will provide optimised
time and weather compensation to achieve maximum efficiency
and minimum boiler cycling whilst maintaining design conditions
within the building.
Single and multiple optimising/weather compensating boiler
controls are available for one or multiple boilers (up to a max
of eight x Gas 310 Eco Pro or four x Gas 610 Eco Pro).
These compensators can regulate the boiler output against
outside weather conditions and provide time and temperature
control over the direct hot water (DHW).
The compensator is mounted in one of the boilers and is
interfaced to communicate with the boiler’s controls via the
supplied adapter.
On-site connection of the supplied outside and common flow
sensors completes the installation.
Note: Please refer to the relevant control leaflet for optimising/compensation settings.
ANALOGUE INPUT (0-10)
The function of the analogue input can be set using parameter
P 3 7. This control can be based on temperature or heat output.
If this input is used for 0-10 V control, then the boiler OT
communication is ignored.
ANALOGUE TEMPERATURE-BASED CONTROL (°C)
The 0-10 V signal controls the boiler flow temperature.
This control modulates on the basis of flow temperature,
whereby the heat output varies between the minimum and
maximum values on the basis of the flow temperature set
point calculated by the controller.
ANALOGUE HEAT OUTPUT-BASED CONTROL (%)
The 0-10 V signal controls the boiler output. The minimum and
maximum values are limited. The minimum output is linked
to the boiler’s modulation depth. The output varies between
the minimum and maximum value on the basis of the value
determined by the controller.
*Dependent on the minimum modulation depth (set speeds, standard 20%)
INPUT SIGNAL (V)
TEMP °C
DESCRIPTION
0-1.5
0-15
Boiler off
1.5-1.8
15-18
Hysteresis
1.8-10
18-100
Temperature required
INPUT SIGNAL (V)
HEAT OUTPUT %
DESCRIPTION
0-2.0*
10-20
Boiler off
2.0-2.2*
20-22
Hysteresis
2.0-10*
20-100
Heat output supplied
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