Input B31/H2; Sensor 2 - Siemens RVA63.280 Basic Documentation

Benefit
Description
Important
Setting
Effect
Note
Note
128/184
Siemens Building Technologies
Landis & Staefa Division
2.59

Input B31/H2

Second d.h.w. temperature, minimum temperature demand, heat generation lock,
changeover of operating modes.
Multi-functional signal input which, with this setting, can be used for different purposes.
The relay contacts must be suited for use with extra low voltage (gold-plated).
Setting range
0...6
With this setting, the function of terminal H2 can be changed. This will have different
impacts on the controlled system, depending on the sensor signal received or
depending on the switching status of a potential-free contact.
0 D.h.w. sensor 2
Connection facility for a second d.h.w. sensor.
1 Minimum flow temperature setpoint (TVHw)
The set "Minimum flow temperature setpoint contact H" of setting line 171 is
activated when the contact is closed.
2 Heat generation lock
Heat generation is locked when the contact is closed.
3 Changeover of operating mode HC1
The operating mode of heating circuit 1 will change when the contact is closed.
D.h.w. heating remains unchanged. The d.h.w. circuit remains unchanged.
4 Changeover of operating mode HC2
The operating mode of heating circuit 2 will change when the contact is closed.
D.h.w. heating remains unchanged. The d.h.w. circuit remains unchanged.
With the exception of setting 0, several controllers of other manufacture can be
connected in parallel to input H2. The function will be activated when one or several
contacts close(s), depending on the selected setting.
When used as a sensor input (settings 0) no parallel connection is possible.
2.59.1 D.h.w. sensor 2
When choosing this setting, this terminal can only be used with the second d.h.w.
detector.
The d.h.w. storage tank temperature can be acquired with one sensor located at the
bottom and one at the top of the tank. This will ensure better storage tank efficiency.
For more detailed descriptions about the control with 2 d.h.w. sensor, refer to "D.h.w.
switching differential" in Index.
Basic Dokumentation RVA63.280, RVA53.280
Unit
Increment
Factory setting
0
CE1P2374E
19.04.2001