Installation manual

installation manual TWIN 80 EN
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Pump monitoring: When 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 (combi-boiler or external cylinder), the
pump is continuously at high speed.
System water pressure monitoring:
If the system water pressure
changes by more than ± 0.27 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 with
switching over from heating to hot water operation and reverse
for 16 seconds.
4.1.5. Post rinse
(Fan on - Gas valve off - Glow plug off - Ionisation off)
Combustion chamber is being post-ventilated with air following
boiler operation.
At end of heat demand (burner stop) the regulation runs into
post-rinse. The fan runs at the last demanded speed for 20
seconds.
4.1.6. Pump after run
(Fan off - Gas valve off - Glow plug off - Ionisation off)
The pump is mixing the heating water over the system.
The pump continues to run over the heating circuit for a certain
time period (adjustable, with minimum of 1 minute and
maximum of 24 hours).