17
Diagram 80:
Solar power unit, (combined) buffer tank, heating circuit, burner
requirement
Sensors
Outputs
T1…. Collector
A1…. Heating circuit pump
T2…. Tank top
A2…. Solar pump
T3…. Tank bottom
A3…. Mixer open
T4…. Heating circuit flow
A4…. Mixer close
T5…. Outdoor temperature
A5…. Burner requirement
T6…. Room sensor
Basic function (P80):
Enable of heating circuit pump by minimum threshold
min1
at sensor
T2
; control of solar pump
A2
and burner requirement
A5
.
A1 = T2 > min1 & (heating = active)
A2 = T1 > T3 + diff1 & T3 < max
A5 = T2 < min2
Program 81:
Burner requirement referring to nominal flow temperature
Vsoll
; time program
for
A1
defines the burner requirement for heating circuit, time program linked with
A5
hot
water service.
A5 = T2 < min2 or (T2 < Vsoll + diff2 & (heating = active))
Required settings:
min1
…switch-on thresh. T2
A1
min2
…switch-on thresh. T2
A5
max
…limit tank bottom T3
A2
diff1
…Coll. T1 – Tk.bottom T3
A2
diff2
…see progr.81 (T2-Vsoll)
A5
V
max
, V
min
T+20, T-20
T
norm
, T
abs
mixer control parameter Mr
heating circuit pump parameter HPu
time program
A1 off
T2 < min1 T1
diff1
A1 on
A2
on
Switch-off cond.
HPu
T3 > max
A1 off
A2 off
Burner
A5
T2 < min2
A5 = burner
requirement
Summary of Contents for HZR 65
Page 1: ...HZR 65 Version P5 6 7 EN Universal heating controller Operation Installation instructions en ...
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Page 31: ...31 Schematic representation of setting values ...
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