Corrigo E Heating manual, revision G Chapter 5 Functional description 19
5.2.4 Pump control (HW1 only)
Corrigo E has a digital output signal that can be used to control the hot-water circulation pump in
HW1. The pump will run according to the settings of the night set-back schedule, running during
normal temperature periods and standing still during periods with reduced temperature.
5.2.5 Periodic overheating
Once daily, at 02:00 am the temperature set-point can be increased to 62°C to prevent growth of
Legionella bacteria. The raised set-point is maintained until the supply temperature reaches 60°C
but not shorter than 1 minute and not longer than 5 minutes. If the pump is stopped it will start and
run for the duration of the overheating period plus 2 minutes.
5.3 Storage tank
A storage tank function can be enabled.
The storage tank load pump, P1-HP1 is started depending on the storage tank supply water and
return water temperatures.
Loading is started if the return water temperature is lower than the set start temperature.
Loading is stopped when the supply temperature is higher than the set stop temperature and the
return temperature is higher than the set start temperature + the set differential.
5.4 Pressure control
Corrigo E can, using an analogue output signal, control a variable speed pump to maintain a
constant settable pressure. A digital output signal is available to give a start signal to the frequency
converter. This output is enabled as soon as the converter control signal rises above 0.1 V.
5.5 Boiler control
A simple boiler control can be enabled.
When the boiler temperature falls below Start temperature 1 the digital signal Start 1 will be
activated. Should the temperature fall below Start temperature 2 the digital output Start 2 will be
activated.
Any active outputs will be deactivated when the boiler temperature rises above the set Stop
temperature.
5.6 Cold-water monitoring
One or two circuits monitoring the cold-water usage can be configured each using a digital pulse-
input from a water meter. The pulse constant is settable. Maximum pulse rate is 2 Hz.
5.6.1 Values
The following values are calculated
• 24 hour usage in litres, today
• 24 hour usage in litres, yesterday
• 24 hour usage in litres, day before yesterday
• Lowest hourly usage in litres, today
• Lowest hourly usage in litres, yesterday
• Usage total in m
3
. The value is resettable
• Water-flow (litres / min)
To Next Page
Loading...