Control Of The Bypass Pump; Parallel With The Burner Setting 0 - Siemens RVA63.242 User Manual

Benefits
Description
Setting
Prerequisite
Effect
In general:
Example:
Siemens Building Technologies
Landis & Staefa Division

5.20 Control of the bypass pump

Reduction of flue gas condensation.
More efficient adherence to the boiler return temperature's minimum limitation.
The boiler bypass pump improves the circulation of water through the boiler, thus
preventing the boiler temperature from falling below a certain level.
Setting range
0 / 1
For control of a boiler bypass pump, setting line 95 or 96 must be adapted first. Also
refer to "bypass pump" in Index.
The selection changes the operating mode of the boiler bypass pump.
Entry:
0 Parallel with the operation of the burner
The boiler bypass pump is switched on / off according to the burner's on / off
signals.
1 According to the boiler return temperature
The boiler bypass pump is switched on / off according to the minimum limitation
of the boiler return temperature and the switching differential of the bypass
pump.
5.20.1 Parallel with the burner
Setting 0
Operation of the boiler bypass pump according to the burner's on / off signal allows the
bypass pump to be operated with no need for using a boiler return sensor.
In that case, the additional setting lines 23
deactivated.
Burner Bypass pump
ON ON
OFF OFF (on completion of the pump overrun time)
BR
1
0
BP
1
0
tPN
Basic Documentation RVA63.242, RVA53.242
Description of OEM settings
Unit
Increment
and 22
OEM OEM
t
t
tPN
Factory setting
0
for the bypass pump are
BR Burner
BP Bypass pump
tPN Pump overrun time
165/218
CE1P2373E
26.03.2001