Diagram 80
23
Program 88:
A1
gets additionally the threshold
min1
at
T1
. The solid fuel boiler is not appli-
cable. The domestic hot water preparation by
A2
is also switching, if
T4
is greater than
T5
by
diff2
.
T5
could be a volume flow switch.
A4
is used for burner requirement.
A4
switches
when
T2
has not exceeded
max4
.
A1 = T1 > min1 & T1 > (T3 + diff1) & T3 < max1
A2 = T4 > (T5 + diff2) or (T2 > 50°C & T4 < max2)
A3 = (T6 > min2 or T6 > (T2 + diff3)) & T2 < max3
A4 (on) = T2 < max4 – hysteresis
A4 (off) = T2 > max4
Program 89:
according to program 88, but: If
T4
has reached
max3
, the quick warm-up
phase has been completed, and the speed control of
A1
is thus blocked
optimal efficiency.
Program 92:
according to program 88, but: the changing between tank center and top is
done by a thermic valve. Therefore
A3
is free for an additional feed pump function.
A3
switches when
T6
is increasing
min2
and
is greater than
T3
by
diff3
and
T3
has not exceed-
ed
max3
.
A1 = T1 > min1 & T1 > (T3 + diff1) & T3 < max1
A2 = T4 > (T5 + diff2) or (T2 > 50°C & T4 < max2)
A3 = T6 > min2 & T6 > (T3 + diff3) & T3 < max3
A4 (on) = T2 < max4 – hysteresis
A4 (off) = T2 > max4
Program 94:
according to program 92, but: the sensor
T2
in the tank top is used for the feed
pump function
A3
. Therefore this function is better suitable for oil or gas boilers.
A1 = T1 > min1 & T1 > (T3 + diff1) & T3 < max1
A2 = T4 > (T5 + diff2) or (T2 > 50°C & T4 < max2)
A3 = T6 > min2 & T6> (T2 + diff3) & T2 < max3.
A4 (on) = T2 < max4 – hysteresis
A4 (off) = T2 > max4
T1 T6 T6 T4 A2 off
min1 min2 T2 < 50°C
diff1 diff3 diff2
A1 A3 A2 A2 on
A3
T3 T2 T5 A2 on
max1 max3 T4 > max2
Required settings:
diff1
…coll. T1 – TK T3
A1
diff2
…sensor T4 – sensor T5
A2
diff3
…flow T6 – TK T2
A3
min1
…switch-on temp. coll. T1
A2
min2
…switch-on temp. flow T6
A3
max1
…limit TK T3
A1
max2
…limit WW T4
A2
max3
…threshold TK T2
A3
max4
…burner requirement T2
A4
Additional
: Both speed controls
Pd1,
Pd2
Burner A4
T2 max4