3/4
3/4
∆T control
The controller works as a standard differential controller. If the temperature reach-
es or exceeds the switch-on temperature difference, the pump switches on. When
the temperature difference reaches or falls below the adjusted switch-off tempera-
ture difference, the respective relay switches off.
Note:
The switch-on temperature difference must be 0.5 K higher than the
switch-off temperature difference. The set temperature difference must be
at least 0.5 K higher than the switch-on temperature difference.
Note:
In systems with 2 stores or store loading in layers, 2 separate menus
(LOAD and LOAD 2) will be displayed.
Speed control
If the temperature reaches or exceeds the switch-on temperature difference, the
pump switches on at 100% speed for 10 s. Then, the speed is reduced to the mini-
mum pump speed value.
If the temperature difference reaches the adjusted set temperature difference, the
pump speed increases by one step (10 %). The response of the controller can be
adapted via the parameter Rise. If the difference increases by the adjustable rise
value RIS, the pump speed increases by 10 % until the maximum pump speed of
100% is reached. If the temperature difference decreases by the adjustable rise
value, pump speed will be decreased by one step.
Note:
To enable speed control, the corresponding relay has to be set to AU TO,
MIN, MAX, or ADAP (MAN channel) and relay control to PULS,
PSOL, PHEA or 0-10 V (adjustment channel REL).
Store set temperature
The store set temperature can be adjusted in the S(2)SET channel.
Note:
For more information about relay control, see page 60.
LOAD (2) 3/4
PUSH
DT(2) O
Switch-on temperature diff.
Adjustment range: 1.0 … 50.0 K
in steps of 0.5 K
Factory setting: 6.0 K
DT(2) F
Switch-off temperature diff.
Adjustment range: 0.5 … 49.5 K
in steps of 0.5 K
Factory setting: 4.0 K
DT(2) S
Set temperature difference
Adjustment range: 1.5 … 50.0 K
in steps of 0.5 K
Factory setting: 10.0 K
S(2)SET
Store set temperature
Adjustment range: 4 … 95 °C
Factory setting: 45 °C
a c
b
To Next Page
Loading...
Need help?
General
