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© RESOL 10306_DeltaSol_E.monus.indd
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Bypass:
Solar/Options/Bypass
selection: “Yes”, “No”
factory setting: “No”
In order to prevent energy from being extracted from the
tank when starting tank loading, this function makes sure
that the cold fluid in the pipes is diverted past the tank via
a bypass (valve or pump). Once the pipe is warm enough,
the tank can be loaded.
The bypass relay is energized if the temperature at the refe-
rence sensor is by 5 °Ra higher than the tank temperature
and if the switch-on condition for tank loading (see tank
loading) is fulfilled. The relay is switched off if this tempe-
rature difference is lower than 3 °Ra. These temperature
differences cannot be adjusted.
Variation valve:
Variations with valve or bypass
Solar/Expert/Bypass
selection: “Valve”, “Pump”
factory setting: “Valve”
A bypass valve is placed into the solar circuit.
The solar heat exchanger is first bypassed when tank loading
is possible. If the above-mentioned switch-on condition is
fulfilled, the bypass relay switches the collector circuit via
the heat exchanger.
Variation pump: In this version, a bypass pump is placed in front of the col-
lector pump.
The bypass pump is first activated when tank loading is
possible. If the above-mentioned switch-on condition is
fulfilled, the bypass pump is switched off and the collector
circuit pump is activated.
This variant is available in 1-collector field systems only.
Bypass sensor:
Solar/Expert/Sen. Bypass
adjustment range: 1 ... 10
factory setting: 3
The reference sensor is located in front of the valve or the
pump respectively. The default is sensor 3, but this can be
changed using this menu item.
External heat exchanger:
Solar/Options/Ext. heat. ex.
selection: “Yes”, “No”
factory setting: “No”
Solar/adj. values/he DTon
adjustment range: 2.0 ... 40.0 °Ra
factory setting: 12.0 °Ra
Solar/adj. values/he DToff
adjustment range: 1.0 ... 39.0 °Ra
factory setting: 8.0 °Ra
Solar/Expert/Sen. Ext. HE
adjustment range: 1 ... 10
factory setting: 3
This function is used to link loading circuits that are sepa-
rated by an external heat exchanger.
The heat exchanger relay is activated if the temperature at
the reference sensor exceeds the tank temperature by the
adjusted value “HE DTon” and if the switch-on conditions
for tank loading (see “tank loading”) are fulfilled.
The relay is switched off if this temperature difference falls
below the adjusted switch-off difference HE-DToff.
In contrast to the bypass function, a differential regulation
between “T-HE” (“Sen. Ext. HE”) and “Tst” can be carried
out by means of the heat exchanger relay.
The reference sensor (“Sen. Ext. HE”) can be arbitrarily
allocated.
In systems in which tanks are equipped with their own
loading pumps, the relay “external heat exchanger” controls
the primary circuit pump.
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