Cosmo Multi 3 Montage- Und Bedienungsanleitung Seite 137

7. SOLAR
Reference
Relais
relay
Exemplary figure of twin pumps in the solar flow
with upstream flowmeter
The parameter Initialis. is used for adjusting the period during which the switch-on condition
must be permanently fulfilled, before the filling process starts.
The Booster option is used for switching on a second pump when filling the solar system. The
corresponding output is switched on at 100 % speed for the duration of the filling time.
After the system has been emptied and the delay time elapsed, the Drain impulse option will
switch on the solar pump for an adjustable duration. Thus, a hydrostatic head will form in the
flow pipe. When it falls back into the holding tank, water pockets remaining in the collector will
be sucked down into the holding tank.
NOTE:
If the drainback option is used in multi store systems, the Break speed option has to
be activated in the Solar / Basic setting / Load. logic menu!
Twin pump
Solar / Opt. functions / Add new function / Twin pump
Adjustment
channel
Output
Ref. relay
Runtime
Flow rate mon. Flow rate monitoring option Yes, No
Sen. flow rate
Delay
Funct.
Sensor
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 reference relay is
switched on again in the next switch-on process.
Additionally, flow rate monitoring can be activated in order to activate the twin pump in case
Output
Bezugsrelais
of a flow rate error. If flow rate monitoring is activated, an error message appears when no
flow 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 flow rate.
Heat dump
Solar / Opt. functions / Add new function / Heat dump
Adjustment
channel
Output
Type
DTValve
Collector
TCol.
Funct.
Sensor
This function can be used to direct excess heat generated by strong solar irradiation 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 adjusted in the
Type menu.
Adjustment
Description
range / selection
Twin pump output selection system dependent
Reference relay selection
Pump runtime
Flow rate sensor selection
Delay time
Activation / Deactivation
Switch input selection
Description
Output selection
Variant (pump or valve logic)
Temperature difference valve
open
Collector selection
Collector overtemperature
Activation / Deactivation
Switch input selection
Factory setting
system dependent
system dependent -
1 ... 48 h 6 h
No
system dependent -
1 ... 10 min 5 min
Activated, Deacti- Activated
vated, Switch
- -
Adjustment range
Factory setting
/ selection
system dependent system dependent
Valve, Pump Valve
0.0 ... 10.0 K 3.0 K
system dependent 1
40 ... 190 °C 110 °C
Activated, Deactivat- Activated
ed, Switch
- -
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