ROTOTERM MR-TR
10
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2nd example
Room temperature in transition period corresponds but is too high in cold periods.
In this case the slope of heating curve [n] should be set to lower value.
transition
period
cold
period
4. TEMPERATURE LIMIT OF MIXED FLOW: [o]
from:
to
Temperature limit of mixed flow is used in systems where smaller areas of under floor are heated with pipes of radiator heating
(bathrooms, toilet rooms). To prevent damages of under floor systems or under floor linings (ceramic tiles) the temperature in pipes
should be limited under certain temperature value (50°C). Such limit value, used in radiator heating systems, prevents fast rise of
temperature of heating units during very cold mornings; consequently the time required to reach the desired room temperature is
extended. Therefore in this case it is recommended to pre-set the time for morning start up of heating
WARNING:
If the temperature of heating water line for radiator heating is limited to too low value it is possible that very low morning
temperatures prevent reaching of required room temperature.
Considering the type of heating the controller enables the following settings:
Under floor heating:
from 30°C to 50°C (factory setting 50).
Radiator heating:
from 30°C to 85°C (factory setting 80).
5.PUMP SWITCHING OFF: [c]
from:
to
This setting specifies the temperature at which the controller switches off the pump, when mixing valve is already closed. This
function enables that all heating units are uniformly cooled down after termination of higher operating mode.
Factory settings of deactivation: radiator heating: 30°C, under floor heating: 25°C.
6. INFLUENCE OF ROOM UNIT: [E]
from:
to
This setting specifies the degree of increase or decrease of the temperature of heating water line if room temperature changes for
1°C. Higher is the inertia of the system, lower should be the influence of room unit and vice versa.
Under floor heating:
the influence of room temperature can be set between 0 and 5 (factory setting 3);
radiator heating:
between
0 and 15 (factory setting 8).
When MR-TR controller is used solely as temperature controller of mixed flow with reference to out side temperature (without room
unit), the terminal pins 5 and 6 remain free.
IN THIS CASE THE INFLUENCE OF ROOM UNIT MUST BE SET TO 0!
3rd example
Room temperature in transition period too low but in cold period corresponds.
4th example
Room temperature in transition period too high but in cold period it corresponds.
1st step
Increase parallel shift of curve [P] to higher value.
2nd step
Set ratio of heating curve [n] to lower value.
1st step
Increase parallel shift of
curve [P] to lower value.
2nd step
Set ratio of heating curve
[n] to higher value.
transition
period
cold
period
transition
period
cold
period
transition
period
cold
period
transition
period
cold
period
