Switchover Via Room Panel; Switchover Via Binary Input In Room Panel; Frost Protection; Return Flow Temperature Limitation - Samson 5757-7 Mounting And Operating Instructions

5.3.2 Switchover via room panel

The operating mode of the controller is determined at the mode selector switch on the
Type 5257-7 Room Panel:
Rated operation (day mode)
Reduced operation (night mode)
OFF/Frost protection
Functions
F05 – Potentiometer input
F06 – Resistance range of potentiometer

5.3.3 Switchover via binary input in room panel

The terminals 1 and 4 of the Type 5257-7 Room Panel can be bridged by means of an ex-
ternal floating contact (e.g. by a time switch with downstream contactor relay with floating
make or break contact). This enables the controller to switch to the rated operation mode
when the mode selector switch is set to reduced operation
The following applies:
4
BI break contact
4
BI make contact
Functions
F05 – Potentiometer input
F06 – Resistance range of potentiometer
5.4

Frost protection

If the controller is in the operating mode OFF/Frost protection (see section 5.3), frost protec-
tion measures are initiated if the following applies:
4
Outdoor temperature < 3 °C (outdoor temperature compensated control) or flow
temperature < 15 °C (fixed set point control with room temperature influence)
The circulation pump is switched off and the flow temperature is kept at 20 °C.
5.5

Return flow temperature limitation

The temperature difference between the flow and return flow in a network indicates how well
the energy is used: the greater the difference, the higher the efficiency.
Operating mode is the same as the mode set at the mode selector
switch
Operating mode is rated operation,
regardless of the mode set at the mode selector switch
WE Configuration
0 F05 - 1
0 F06 - 0 (Type 5257-7 Room Panel)
or OFF/Frost protection
WE Configuration
0 F05 - 1
0 F06 - 0 (Type 5257-7 Room Panel)
Functions
.
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EB 5757-7 EN