1.7 RSA: Rapid System Heating
Note: Setup is as follows:
“Accumulator” → “Settings” → 9.05 RSA ON <.
Setting note: Low temperature heating 30°C to 40°C / Radiator heating or heating system with a hot water tank
45°C to 50°C.
Factory setting: 50°C / Setting range: 0°C to 60°C.
Setting 20°C: Can be advantageous, if the boiler output is significantly larger than the heating demand – then
RSA is not required.
If RSA is activated, RSA displays.
Use: The accumulator temperature quickly climbs to a “usable temperature” with enough of hot water
available for use. Thereby, sensible heat and usable hot water are produced quickly.
Effect: This function temporarily reduces the return temperature. Thus, the water quantity, released
from boiler and accumulator, increases. RSA can be executed multiple times per combustion. This
happens, if the temperature at the accumulator sensor drops under the in 9.05 RSA ON < set
value.
Function: If “Acc. t.-F4” is < than the in 9.05 RSA ON < set value, RSA function is activated.
1.8 SLA: Peak Load Coverage
Note: Setup is as follows:
“Accumulator” → “Settings” → 9.04 SLA ON <.
Setting note: Low temperature heating 40°C to 50°C / Radiator heating or heating system with a hot water tank
50°C to 60°C.
Factory setting: 60°C / Setting range: 20°C to 60°C.
If SLA is activated, SLA displays.
Use: If a higher output than the boiler rated output is required.
Effect: The boiler output is increased to its maximum output. The maximum output varies
depending on the boiler type, the type of fuel and its moisture content.
Function: After successfully completing AFO, SLA is automatically activated, if the “Acc. t.-F4” value is <
than the in 9.04 SLA ON < set value.
If the “Acc. t.-F4” exceeds the set value, SLA is deactivated and disabled for the next 30 minutes.
The SLA runtime is 60 minutes.
1.9 PAE: Accumulator Run-up Easing
Note: If PAE is activated, PAE displays.
PAE is solely executed in correlation with EW-1 HK (EW-2 HK) and Multi-Control 2
plus
.
Function: Limitation of the heating demand of the Logotherm regulated heating circuits.
Function description:
Note: Setup is as follows:
“Accumulator” →“Settings” → 9.06 PAE ON <.
The setting allows an adaptation to the temperature level of the heating circuits.
Setting note: Low temperature heating 40°C to 50°C / Radiator heating or heating system with a hot water tank
50°C to 60°C.
Factory setting (Fact.): 50°C / Setting range: 20°C to 60°C.
Use: If the heating demand is high and the “Acc. t.-F4” is lower than required by the heating circuits,
PAE prevents the accumulator from heating up to capacity due to fully opened heating circuit
valves. If the accumulator is heated up to capacity, the heating time of the system is extended. Is
the heating circuit temperature too low, the boiler output cannot be given off to the radiators, but
is returned to the accumulator. Due to the downstream accumulator the “Acc. t.-F4” and the
heating circuit temperature increase slowly. This might give the impression that the boiler output
is too low. Since PAE throttles the heating circuit, it prevents that from happening.
In the factory setting PAE < 50°C, the hot water is quickly heated up to a usable temperature due
to the limitation of the heating demand.
Effect: Only available in “Boiler ON” mode and if the return valve is > 0% and the
“Acc. t.-F4” is < 9.06 PAE ON <.
Function: Factory setting: 50°C. An “Acc. t.-F4” ≥ 50ºC does not influence the heating output of the heating
circuits – the HC-release is = 100%.
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