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Program 912 – Automatic boiler, (combined) buffer, heating circuit, burner request
Basic functionality (P912):
The combined buffer is held to a certain temperature by the au
-
tomatic burner. Buffer charging pump
A2,
burner request
A3,
Mixer regulation
A4+A5.
A1 = S5 > min2 & (Heating = active)
A2 = S4 > min1 & S4 > S5 + diff1 & S5 < max1
A3 on =
[
(S6 < min3 & TP
Req. DHW
) or (S5 < set flow temp + diff3 & (Heating = active))
]
& TP
Req. Burner
& S4 < max2
A3 off =
[
S6 > max3 & (S5 > set flow temp + diff3 & (Heating = active))
]
or S4 > max2
Sensors
Outputs
S1 ... Room sensor
A1 ... Heating circuit pump
S2 ... Temperature outside
A2 ... Buffer charging pump
S3 ... Heating circuit flow
A3 ... Burner request
S4 ... boiler
A4 ... Mixer OPEN
S5 ... Buffer top
A5 ... Mixer CLOSE
S6 ... Buffer bottom
Burner request
A3
S4 < max2
and
Time programs
and
S6
à
min3/max3
or
Heating active
and
S5 < Set flow temp + diff3
necessary parameter settings
min1
... activation threshold
S4
à
A2 max1
... limit buffer
S5
à
A2
min2
... activation threshold
S5
à
A1 max2
... limit boiler
S4
à
A3
min3
... Heating request on
S6
à
A3 max3
... Heating request off
S6
(
S5
)
à
A3
diff1
... Burner
S4
- CYL bot.
S5
à
A2 diff3
... CYL bottom
S5
< set flow t.
à
A3
Summary of Contents for UVR65
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