35
742.110 | 14.50
EN
10.3.11 Solid fuel boiler
T
T
F
unc
SET
off
Controls a pump in order to heat a storage tank using a solid fuel boiler.
The pump must be connected to output
R1
.
The pump is switched on when all of the following conditions are satis-
fied at the same time:
•
The temperature difference between the solid fuel boiler and the
storage tank exceeds T
diff on
.
•
The solid fuel boiler temperature lies above the
min. solid fuel boiler
temperature
.
•
The storage tank temperature lies below the
max. storage tank
temperature
.
The pump is switched off when one the following conditions is satisfied:
•
The temperature difference between the solid fuel boiler and the
storage tank drops below T
diff off
.
•
The solid fuel boiler temperature drops below the
min. solid fuel
boiler temperature
.
•
The storage tank temperature reaches the
max. storage tank tem-
perature.
Speed control of the pump can be activated as required. The loading
strategy of the speed control system attempts to regulate the tempera-
ture of the solid fuel boiler to match the control target that has been set.
The control target should be at least 20 F above the minimum tempera-
ture of the solid fuel boiler.
Display
Characteristic
min.
max.
Factory
setting
Activation
on
,
oFF
oFF
Pump type
AC
,
HE
1) 2)
AC
Pump characteristics (only
HE
)
bA
,
bb
,
C
(see p. 14)
–
Speed control
on
,
oFF
2)
oFF
Minimum speed (only
AC
)
30 %
100 %
50 %
Minimum speed (only
HE
+
bA
)
0 %
100 %
25 %
Minimum speed (only
HE
+
bb
)
0 %
100 %
75 %
Sensor input for storage tank
temperature
1 ... 5
–
Sensor input for solid fuel boiler
temperature
1 ... 5
–
Switch-on temperature difference
T
diff on
T
diff off
+ 4 F
40 F
12 F
Switch-off temperature difference
T
diff off
0 F
T
diff on
– 4 F
6 F
T
F
unc
SET
max
Max. storage tank temperature
32 °F
300 °F
140 °F
Summary of Contents for TR-A501T-U
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