Produal TRC-P Series Manual page 9

High/Low Limit Control
(Reset Control)
Mode Button and Screen
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If an external NTC10 sensor is fitted (to RI1 or RI2) and
the corresponding high/low limit input has been enabled,
the controller can carry out high limit and/or low limit
control. In high limit control, if the external temperature
exceeds the High Limit setpoint, the main control setpoint
is reduced by the amount set in the Limit Ratio per
degree. E.g. if the Limit Ratio is 2, every degree that the
external temperature exceeds the High Limit setpoint, the
target (setpoint) is reset by 2 degrees.
Note: RI2 is not available with TRC-P-2A3R.
The Low Limit control works in reverse. If the external
temperature drops below the Low Limit setpoint, the main
control setpoint is increased by the amount of the ratio for
every degree below the Low Limit setpoint.
The setpoint reset amount follows the formula:-
Setpoint_Reset = (Limit_Setpoint - Temperature ) * Limit_Ratio
NOTE: The target setpoint on the display is not changed during the limitation. The limit icon
indicates active limitation. To see the effective limited setpoint enter Controller Status and
Information display.
Note: The limit function is enabled by setting the Limit Ratio parameter (as default 0.0 =
disabled).
Note: In OFF mode high/low limit function is disabled.
By touching the MODE BUTTON on the HOME
SCREEN, the device enters to the MODE
SCREEN. From the MODE SCREEN the
operating mode of the controller can be
selected.
The possible selections for the MODE screen
are:-
• BOOST MODE
• COMFORT MODE
• ECO MODE
• OFF MODE
After selecting the Mode the device
automatically returns to the HOME SCREEN. If
no buttons are pressed the device returns
automatically after a timeout. Alternatively the
return button can be pressed to return.
The Mode button has the following
configuration options:-
• Mode Display Only
• Mode Selection and Display (default)
HIGH/LOW
LIMIT ICON
INDICATES
THAT LIMIT IS
BEING
APPLIED
MODE BUTTON AND
MODE INDICATION
BOOST MODE
COMFORT MODE
ECO MODE
OFF MODE
BOOST MODE
(STATUS &
BUTTON)
BOOST MODE
BUTTON
COMFORT MODE
BUTTON
ECO MODE
BUTTON
OFF MODE
BUTTON
RETURN TO HOME
SCREEN
Copyright © 2020 Produal Oy - All rights reserved - 07/2020
Produal Oy
Target
°C
21
.5
A
Room
20 °C
.1
HOME SCREEN
Wed 12:43
Target
°C
21
.5
Room
20
°C
.1
MODE SCREEN
PS 6001TRC-P - 9/34