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March 2011
Flex Fuel Owner’s Manual
If a buffer is available, the following figure appears on the screen of the actual values of
individual system components. To access the buffer settings turn the control knob while on the start
screen until the following screen appears.
If you would like to check and/or change your buffer settings, press the control knob. The menu
“BUFFER - Settings” will appear on the screen.
14.1 Buffer Settings
Minimum Buffer Temperature: Top
(The temperature can be adjusted from 0 - 131 °F)
If the buffer is released chronologically and if the “buffer temperature, top” is less than the minimum
buffer temperature, the furnace is started and the buffer is loaded. If the heater is active, the heating
cycle pumps are switched on as soon as the buffer temperature is greater on the top than the set “min.
buffer temperature, top”.
Maximum Buffer Temperature: Bottom
(The temperature can be adjusted from 0 - 194 °F)
The buffer is charged until the “buffer temperature bottom” is greater than the set “max. buffer
temperature, bottom”, if the buffer has a chronological release.
Buffer Difference
(The temperature can be adjusted from 0 - 68°F)
The buffer difference temperature is the temperature by which the buffer temperature, top may be less
than the required flow temperature before the furnace is started (with furnace operating modes “Pellets-
auto control” and “bulk material auto control”).
14: Buffer/Thermal Storage
Actual Counter (Buffer 1 To 4)
Top Buffer Temperature
Bottom Buffer Temperature
Set Buffer Energy Source
Actual Release
Pump Status
Shows If Buffer Gets A
Request From A Component
Show If Buffer Sends Request
To First Energy Source
Actual Temperature Of Set
Buffer Energy Source
120ºF
70ºF
BUFFER 1
act. release: always On
Pump: Off
Request in: Off
Request out: Off
Boiler 88ºF
BUFFER - Settings
min buffer temp top: 110ºF
max buffer temp bottom: 123ºF
Buffer difference: 8ºF
Release type: w clock
Release period 1: 17:00-20:00
Release period 2: 00:00-00:00
Release period 3: 00:00-00:00
