58
en
Output
Reference relay
Relais
Bezugsrelais
Exemplary fi gure of twin pumps in the solar fl ow with upstream fl owmeter
This function controls the equal distribution of pump runtime in systems with 2
equally usable pumps.
If the selected reference relay has exceeded the adjusted runtime, the allocated
output (twin pump) is switched on in the next switch-on process. All characteristics
are adopted.
If the allocated output has in turn exceeded its runtime as well, the selected refer-
ence relay is switched on again in the next switch-on process.
Additionally, fl ow rate monitoring can be activated in order to activate the twin
pump in case of a fl ow rate error. If fl ow rate monitoring is activated, an error
message appears when no fl ow rate is detected at the allocated sensor after the
delay time has elapsed. The active output is considered defective and is blocked until
the error message has been acknowledged. The second output is activated instead.
The twin pump function no longer takes place until the error message has been
acknowledged.
When the error message is acknowledged, the controller runs a test during which it
energises the corresponding output and again monitors the fl ow rate.
Heat dump
Solar / Opt. functions / Add new function / Heat dump
Adjustment
channel
Description
Adjustment
range / selection
Factory setting
Output
Output selection
system dependent
system depend-
ent
Type
Variant (pump or valve logic)
Valve, Pump
Valve
D
TValve
Temperature difference valve open 0.0 … 10.0 K
3.0 K
Collector
Collector selection
system dependent
1
TCol.
Collector overtemperature
40 … 190 °C
110 °C
Funct.
Activation / Deactivation
Activated, Deacti-
vated, Switch
Activated
Sensor
Switch input selection
-
-
Save func-
tion / Delete
function
Save or delete function
-
-
Pump type
Valve type
Output
Output
This function can be used to direct excess heat generated by strong solar irradi-
ation to an external heat exchanger (e. g. fan coil) in order to keep the collector
temperature within the operating range.
Whether the heat dump is activated via an additional pump or a valve can be ad-
justed in the Type menu.
Summary of Contents for DeltaSol MX
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