INS
TALLER MANU
AL
30
System 9
Outputs:
A1
Solid fuel boiler pump
A2 Increase return temperature mixing
valve OPEN
A3 Increase return temperature mixing
valve CLOSED
Inputs:
F1
Solid fuel boiler temperature probe
F4
Temperature probe at bottom of stor-
age cylinder / A1 max. temp. monitor-
ing (when F3 not fitted)
F3
(optional) Temperature probe at top
of storage cylinder / A1 max. temp.
monitoring
F5
Reference probe for increase return
temperature
Switching conditions for A1
Heat production (difference between storage
cylinder and min. temp.)
ON: F1 - F4 > P30 and F1 > P43 + 5°C
OFF: F1 - F4 < P31
or F1 < P43
Maximum storage cylinder temperature
OFF: F3 (or F4) > P50
ON again: F3 (or F4) < P50 - 5°C
Maximum solid fuel boiler temperature:
OFF: F1 > P44
ON again: F1 < P44 - 10°C
Switching conditions for A2:
OPEN - intermittent after mixer control when F5
> P57+1°C (transfer heat in storage cylinder)
Switching conditions for A3:
CLOSED - intermittent after mixer control
when F5 < P57-1°C (increase return tempera-
ture)
F1
F5
F4
(F3)
A1
A2
A3
Fig. 2.18