29
Impulso
(F2)
F5
F4
F1
A1
A2
OFF
ON
(F3)
1
2
M
A3
Impulso
(
)
A3
Fig. 2.17
System 8
Outputs:
A1
Collector pump (speed control)
A2 Switching valve – return temperature
control
A3 Additional relay, freely programmable
function
Inputs:
F1
Collector 1 temperature probe
F4
Temperature probe at bottom of stor-
age cylinder / A1 max. temp. monitor-
ing (when F3 not fitted)
F2
(optional) Collector return tempera-
ture to measure heat production
F3
(optional) Temperature probe at top
of storage cylinder / A1 max. temp.
monitoring, reference probe during
heating
F5
Reference probe for increase storage
cylinder return temperature function
Impulse (optional) pulse input for volumetric
flow meter, circulating pump con-
trolled by impulses
Switching conditions for A1
Heat production (difference between storage
cylinder and min. temp.)
ON: F1 - F4 > P30
and F1 > P40
OFF: F1 - F4 < P31
or F1 < P41
Maximum storage cylinder temperature
OFF: F3 (or F4) > P50
ON: F3 (or F4) < P50 - 5°C
Maximum collector temperature
OFF: F1 > P42
ON: F1 < P42 - 10°C
Switching conditions for A2:
Increase in return flow
ON: F4 – F5 > P32
OFF: F4 – F5 < P33
impulse
impulse
