According To The Boiler Return Temperature Setting 1 - Siemens SIGMAGYR RVP540 Basic Documentation

Process
Reset
Example:
Effect
292/348
Siemens Building Technologies
HVAC Products
5.15.2 According to the boiler return temperature
Setting 1
Operation of the boiler bypass pump is according to the "Setpoint of minimum limitation
of the return temperature" (operating line 252), the "Switching differential of the bypass
pump" (operating line 283
When the boiler return temperature reaches the adjusted "Setpoint of minimum limita-
tion of the return temperature" (operating line 252), the boiler bypass pump will be acti-
vated. This means that hot water will be fed from the flow directly to the return so that
the boiler return temperatures rises.
If the boiler return temperature acquired with sensor B7 exceeds the adjusted "Setpoint
of minimum limitation of the return temperature" (operating line 252) by more than one
"Switching differential of the bypass pump" (operating line 283
pump will be deactivated.
In general:
Prerequisite:
TKRx < TKRmin
TKRx > TKRmin + SDBP
°C
6 0
5 0
4 0
3 0
1 0
B R
1
0
B P
1
0
BR Burner
BP Bypass pump
tPN Pump overrun time
TKRx Actual boiler return temperature
TKRmin Setpoint of minimum limitation of the return temperature (operating line 252
SDBP Switching differential of the bypass pump (operating line 283
The impact on the consumers is identical with the impact described on operating line
259 .
EXP
Basic Documentation RVP540 / RVP550
Description of the EXP settings
), and the measured boiler return temperature (B7).
EXP
Bypass pump
ON
OFF (on completion of the pump overrun time)
T K R x
20 30 m in
m in
t P N
), the boiler bypass
EXP
TKRmin+SDBP
TKRmin
t
t
t
)
EXP
)
EXP
CE1P2488en
18.10.2002