6.1.1 Override using potentiometer
The potentiometer input (e.g. by connecting Type 5257-2 with remote adjustment) can
change either the heating characteristic level or gradient, depending on the configuration.
The parameters
Gradient shift range via potentiometer and Level shift range via potentiome-
ter are used to adjust the range (
±
) in which the override is to take place.
Functions
WE
Configuration
F05 – Potentiometer input
0
F05 - 1
F06 – Resistance range of potentiometer
0
F06 - 0: 1000 to 1100
Ω
F06 - 1: 1000 to 2000
Ω
F07 – Potentiometer function
0
F07 - 0: Level shift
F07 - 1: Gradient shift
Parameters
WE
Range of values
P07 – Gradient shift range via potentiometer
1.0
0.0 to 1.5 (only with F 07 - 1)
P08 – Level shift range via potentiometer
15 K 0 to 30 K (only with F 07 - 0)
Examples:
4
Potentiometer function F07 - 0
Heating characteristic gradient P05 = 1.6
Gradient shift range via potentiometer P07 = 1.0
⇒
The gradient can be shifted between 0.6 and 2.6 (
±
1.0).
4
Potentiometer function F07 - 1
Heating characteristic level P06 = 0 K
Level shift range via potentiometer P08 = 15 K
⇒
The level can be adjusted between –15 K and +15 K (
±
15 K). The limits adjusted
for the flow temperature still apply.
6.1.2 Summer mode
Should the outdoor temperature exceed the
Outdoor temperature limit value (rated opera-
tion/reduced operation), the controller switches off the heating, i.e. the valve is closed and
the circulation pump is switched off after the
Pump lag time (P23) has elapsed.
The heating is switched on again when the outdoor temperature falls below the limit.
Parameters
WE
Range of values
P17 – Outdoor temperature limit value at rated operation
22 °C 0 to 50 °C
P18 – Outdoor temp. limit value at reduced operation
15 °C 0 to 50 °C
P23 – Pump lag time
5 min 1 to 999 min
EB 5757-7 EN
19
Functions