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Siemens Building Technologies
Basic Documentation RVP540 / RVP550
CE1P2488en
HVAC Products
Description of the heating engineer settings
18.10.2002
4.256 Minimum setpoint of the flow temperature,
contact H1 (TVHw)
•
Handling of heat demand signals from units incompatible with LPB
•
Temporary startup of boiler via switching contact
Function for setting the temperature at which the boiler is maintained when contact H1
is closed.
This setting is active only if on operating line 870 (input H1) setting 3 ("Minimum set-
point of the flow temperature, contact H1") has been selected.
Setting range
Unit
Factory setting
8...TKmax °C 70
TKmax
Maximum limitation of the boiler setpoint, operating line 251
EXP
.
Function "Minimum setpoint of flow temperature contact H1" selected on operating line
870 will be activated when contact H1 closes. The heat source will maintain the tem-
perature level set here until either contact H1 reopens or more heat is demanded.
If several heat demand signals are received at the same time (LPB, contact H1, d.h.w.,
or from the controller itself), the highest of them will automatically be selected.
30
20
10
0
-10
40
30
60
50
80
70
TK
TKw
23
79
Z
20
TA
°C
°C
gem
0
TVHw
TVHw Minimum setpoint of the flow temperature, contact H1
TKw Boiler temperature setpoint
Benefit
Description
Important
Setting
Effect
Notes
