USDT 3004 *49012820* 49012820 - Thermomax Technologies

USDT 3004
4.2 Adjustment channels
System layout selection
Arr:
System layout selection.
Adjustment range: 1 ... 3
Factory setting: 1
Security enquiry:
In this channel, a pre-defined system layout can be selected.
Each system layout has a set of pre-programmed settings
that can be individually changed.
If the system layout selection is changed later on, all adjustments
made in the other channels will be lost. Therefore,
changing the system layout is always followed by a security
enquiry.
Only confirm the security enquiry if you are sure that
you wish to change the system layout selection!
ÎÎTo confirm the security enquiry, press button 3
∆T-regulation
DT O:
Switch-on temperature diff.
Adjustment range: 2.0 ... 40.0°Ra
[1.0 ... 20.0 K]
in steps of 1 °Ra [0.5 K]
Factory setting: 12.0°Ra
[6.0 K]
DT F:
Switch-off temperature diff.
Adjustment range: 1.0 ... 39.0°Ra
[0.5 ... 19.5 K]
in steps of 1 °Ra [0.5 K]
Factory setting: 8.0°Ra
[4.0 K]
Pump speed control
DT S:
Nominal temperature difference
Adjustment range: 3.0 ... 60.0 °Ra
[1.5 ... 30.0 K]
in steps of 1 °Ra [0.5 K]
Factory setting: 20.0 °Ra
[10.0 K]
RIS:
Rise
Adjustment range:
2 ... 40 °Ra [1 ... 20 K]
in steps of 2 °Ra [1 K]
Factory setting: 4 °Ra [2 K]
Minimum pump speed
nMN:
Pump speed control
Adjustment range:
30 ... 100
in steps of 5 %
Factory setting: 30
| 20
The controller works as a standard differential controller. If
the switch-on difference is reached, the pump is activated.
When the temperature difference falls below the adjusted
switch-off temperature difference, the relay switches off.
Note:
The switch-on temperature difference must be
at least 1 °Ra [0.5 K] higher than the switch-off
tempe rature difference.
Note:
When the drainback option ODB is activated,
the temperature differences DT O, DT F and
DT S are set to a fixed adjustment:
DT O = 20 °Ra [10 K]
DT F = 8 °Ra [4 K]
DT S = 30 °Ra [15 K]
Previous adjustments made in these channels will
be overridden and may have to be entered again if
ODB is deactivated later on.
Note:
For pump speed control, the operation mode of
relay 1 must be set to Auto (adjustment channel
MAN1)
When the switch-on temperature difference is reached,
the pump is activated at full speed for 10 seconds. Then, the
speed is reduced to the minimum pump speed value (factory
setting = 30 %).
If the temperature difference reaches the adjusted nominal
temperature difference, the pump speed increases by one
step (10 %). If the difference increases by the adjustable rise
value, the pump speed increases by 10 % respectively until the
maximum pump speed of 100 % is reached. The response of
the controller can be adapted via the parameter “Rise”.
Note:
The nominal temperature difference must be
at least 1 °Ra [0.5 K] higher than the switch-on
tempe rature difference.
A relative minimum pump speed can be allocated to the
output R1 via the adjustment channel nMN.
Note:
When a load which is not speed-controlled is
used, the value must be set to 100 % in order to
deactivate pump speed control.
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