ROTOTERM MR-TR
11
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7. PARAMETER: [t]
Parameter [t] has two functions and depends on the type of selected controller (radiator of under floor type heating).
Radiator heating
from:
to
7.1 TEMPERATURE OF BOILER CONDENSE POINT: [t]
When boiler has more users (mixing valves with pumps) or the boiler is under-di men sioned, condense frequently appear during
morning start-ups in boiler and flues due to too high consumption, especially at radiator heating. For this reason the controller is
equipped with KF boiler sensor, which reads boiler temperature. If the temperature of the boiler decreases under the set value, the
controller begins closing the mixing valve and enables the burner to quickly heat the boiler to set temperature. The temperature of
condense point can be set between 30°C and 75°C (factory set to 65).
The very same KF sensor protects the boiler against overheating. It opens the mixing valve and activates the pump, if the temperature
of boiler exceeds 95°C. In this way it prevents deactivation of thermal fuse in boiler regulation unit.
If the sensor is not connected a resistance should be used instead of it - see chapter: Installation of boiler sensor!
Under floor heating
from:
to
7.2 UNDER FLOOR TEMPERATURE LIMIT: [t]
When MR-TR is used as under floor controller, maximum floor temperature can be set. Floor temperature is read by means of BF
sensor installed in screed close to floor surface. This sensor has a function of protection.
The temperature of condense point is set between 15°C and 35°C (factory set to 29).
If the sensor is not connected a resistance should be used instead of it - see chapter Installation of boiler sensor!
CONTROLLER PARAMETER SETTING
Press
MENU
key to enter programme mode. The display shows parameter [n] and numeric value of ratio:
Programming is executed in three procedures. For easier understanding see the diagram on the following page.
First procedure:
set the ratio of heating curve and parallel shift.
Second procedure:
set the limit of mixed flow temperature, pump deactivation, in fluence of room unit and limit of floor
temperature or boiler condense point.
Third procedure:
set the type of controller (radiator/under floor type heating).
When you press
MENU
key you enter the first procedure, where you can set the pa ram eter [n]. Change the value by pressing
arrow keys.
To set the parameters in the second procedure, first press
MENU
key and afterwards keep pressing
E
key for 10 sec. until parameter
[o] is displayed, i.e. Limit of mixed flow tem pera ture.
To set the parameters in the third procedure, first press
MENU
key and afterwards keep pressing
E
key for 20 sec. until parameter
[rAd] or [tAL] is displayed, i.e. Heating type.
When you enter the desired procedure you can change the parameter by pressing ( ) and ( ) keys. To move to the following
parameter shortly press
E
key.
When the last setting of the procedure is entered, press and keep pressing
E
key. The display shows P.r. Keep pressing the
E
key
(about 3 sec) until P.r. dis appears.
If you do not perform above stated step, all entered parameters are lost. If you do not press a key for a longer period of time during
programming procedure, the controller leaves programming mode and returns to normal mode of operation.
When setting controller parameters for the first time, first set controller type [rAd] or [tAL] because when you change the
type of controller factory settings are loaded.
Setting example: CONTROLLER TYPE SETTING
2
. [n] value is dis played.
Press
E
key for > 20 sec.
1
. Press
MENU
key.
3
. After 10 sec. value [o] is displayed,
but keep pressing E key.
4
. Value [rAd] or [tAL] is displayed.
Set controller type with
( ) and ( ) keys.
[rAd] - radiator heating
[tAL] - under floor heating
5
. Keep pressing
E
key until P.r.
disappears and save set values.
