STIEBEL ELTRON SOM 10 - Manual (Page 38)

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This function helps overcome the non-ideal sensor
position with some evacuated tube collectors.
This function operates within an adjusted time frame.
It activates the collector circuit pump for an adjus-
table runtime between adjustable pauses in order to
compensate for the delayed temperature measure-
ment.
If the runtime is set to more than 10 s, the pump will
be run at 100 % for the first 10 s of the runtime. For
the remaining runtime, the pump will be run at the
adjusted minimum speed.
If the collector sensor is defective or the collector is
blocked, this function is suppressed or switched off.
2-collector systems
In 2-collector systems, the evacuated tube collector
function is available for each individual collector field.
If one of the collector fields is being loaded, the heat
transfer fluid flows through the inactive field and only
the corresponding relay is energized.
Multi-store systems
If the evacuated tube collector function is activated,
the speed of the solar pump will decrease to the mi-
nimum speed during the loading break time. The solar
loading of the subordinate store will continue.
In 2-collector systems, during the loading break time,
the collector field which has been active before the
loading break time remains active during the loading
break time, unless the evacuated tube collector func-
tion of the inactive field becomes active. Tube collector function
Adjustment chan-
nel
Description Adjustment range / selection Factory setting
Start Start time frame 00:00 ... 23:00 08:00
Stop Stop time frame 00:30 ... 23:30 19:00
Run Pump runtime 5 ... 600 s 30 s
Break Break 1 ... 60 min 30 min
Delay Pump delay 5 ... 600 s 30 s
Collector Collector field system dependent system dependent
Funct. Activation / Deactivation Activ., Deactivated Deactivated
Solar / Opt. functions / Add new function... / Tube collector