51
en
Bypass
Valve type
Pump type
Bypass sensor
Output
Bypass sensor
Output
Valve type (inverted)
Output
Bypass sensor
Exemplary schematics for the bypass variants
Solar / Opt. functions / Add new function / Bypass
Adjustment
channel
Description
Adjustment range / se-
lection
Factory setting
Collector
Collector fi eld
system dependent
system depend-
ent
Output
Bypass output
system dependent
system depend-
ent
Type
Variant (pump or valve logic)
Pump, Valve
Pump
Inverted
Valve logic inversion
Yes, No
No
Sensor
Bypass sensor
system dependent
system depend-
ent
D
TOn
Bypass switch-on temperature
difference
1.0 … 20.0 K
6.0 K
D
TOff
Bypass switch-off temperature dif-
ference
0.5 … 19.5 K
4.0 K
Funct.
Activation / Deactivation
Activated, Deactivat-
ed, Switch
Activated
Sensor
Switch input selection
-
-
Adjustment
channel
Description
Adjustment range / se-
lection
Factory setting
Save func-
tion / De-
lete
function
Save or delete function
-
-
This function can be used for avoiding an energy loss directly after the solar cir-
cuit has been switched on. The still cold heat transfer medium in the pipework is
diverted through a bypass past the store. Once the fl uid is warm enough, the store
can be loaded.
Depending on whether the bypass is energised by a valve or by a second pump, a
corresponding adjustment can be made in the menu item Type. Depending on the
variant, different control logics are applied:
Pump type
In this version, a bypass pump is placed in front of the solar pump.
The bypass pump is fi rst activated when store loading is possible. If the temperature
difference between the bypass sensor and the store sensor reaches the switch-on
temperature difference, the bypass pump is switched off and the solar pump is
switched on instead.
Valve type
In this version, a bypass valve is placed into the solar circuit.
The valve initially remains switched so that the bypass is active when store loading
is possible. If the temperature difference between the bypass sensor and the store
sensor reaches the switch-on temperature difference, the bypass relay operates the
valve and solar loading starts.
When the valve type is selected, the Inverted option is additionally available. When
the Inverted option and the bypass circuit are activated, the relay switches on. If the
temperature difference between the bypass sensor and the store sensor reaches
the switch-on temperature difference, the relay switches off.
Summary of Contents for DeltaSol MX
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