Installation manual

Coopra Advanced Heating Technologies Installation manual 40 EN
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Fan:
The fan is running at the required speed for modulating heat
demand.
When the measured fan speed deviates from the desired speed,
post rinse will be performed.
Ionisation:
If the ionisation fails, a restart is made, providing this is not the
third time within the burner demand. If this is the third time, the
Manager will lock-out.
Pump monitoring:
If the temperature difference between flow and return is greater
than 30°C, the pump switches to a high speed. When the
temperature difference drops below 10°C again, the pump
switches back to a low speed.
If the pump is on for a HWS demand with a Combi-unit or for
cylinder heat demand, the pump is continuously at high.
If the system water pressure changes by more than ± 0.1 bar (
and ± 0,3 bar with changing pump speed) within 4 seconds, the
regulation will block and switch over to the pump test program.
This test is defeated for 16 seconds with switching over from
central heating to hot water operation and reverse.
6.5. Post-rinse
Fan on - Gas valve off - Glow plug off - Ionisation off
End of heat demand:
At end of heat demand (burner stop) the regulation runs into
post-rinse. The fan runs at the last demanded speed.
The display shows flashing ‘5’.
When the measured fan speed deviates from the desired speed
the regulation blocks.
After 60 seconds the regulation runs into lock-out, with flashing
indication ‘5’.
The display shows flashing ‘8’.
If a false flame signal is detected during post rinse for more than
5 seconds, the regulation runs into lock-out with flashing
indication ‘8’:
The operation can only be restored by pressing the reset button,
placed on the control panel.
6.6. Lock-out
Fan on/off - Gas valve off - Glow plug off - Ionisation off -
Alarm contact on
During lock-out, the pump runs over the central heating circuit.
At the beginning of the lock-out, the fault table in the software is
updated.
With some instances of lock-out, the fan will post rinse for 1
minute at 50% of the maximum speed.
6.7. Pump test program
The display shows continious ‘P’.
The pump is switched off for 15 seconds. The system water
pressure (static pressure) is measured and stored in the
software.
Then the pump is switched to high speed for 15 seconds and 3
seconds after the pump is switched on the water pressure
(active pump pressure) is measured and stored in the software.
If the difference is less than 0.05 bar or more than 0.54 bar the
regulation locks again.
If the difference between the active pump pressure and the static
pressure is between 0.05 and 0.54 bar a correct water flow
throuhg the heat exchanger is present. The pump test is
finished.
6.8. System pressure monitoring
The boiler is in working mode when the system water pressure is
between 0.5 and 3.0 bar.
With a water pressure between 0.2 and 0.5 bar, the burner is
limited to low load.
If the water pressure is less than 0.2 bar, the regulation locks
with a ‘P’ + ‘pressure’ on the display. The display shows
alternately the ‘P’ and the normal status display.
This lock is removed when the water pressure goes above 1.3
bar.
If the water pressure is greater than 3.0 bar, the regulation locks
with a ‘P’ + ‘pressure’ on the display. The display shows
alternately the ‘P’ and the normal status display.
This lock is automatically removed when the water pressure
goes below 3 bar.
6.10. Temperature regulation
Burner is off when the actual flow temperature is 3°C above the
set point ( desired central heating flow temperature 25°C -
90°C). The block is removed with an actual flow temperature of
5°C below the set point.
If the temperature difference between flow sensor and return
sensor is greater than 45°C, the regulation blocks. The block is
removed with a difference of less than 20°C.
If the temperature difference between flow and return sensor is
less than –5°C, the regulation will lock immediately during
central heating and 20 seconds after ignition during tapping.
6.11. Limiter
The display shows continuous ‘H’.
If the flow temperature goes above 105°C, when the burner is
off, the regulation will lock with a continuous ‘H’.
Burner action is restored automatically when the actual flow
temperature is 5°C below the set point (desired central heating
flow temperature 25°C - 90°C).
The display shows flashing ‘H’.
If the flow temperature goes above 105°C, when the burner is
on, the regulation will lock-out with a flashing ‘H’.
The lock-out situation can be removed by pushing the reset
button manually.