Cascade; Changeover Of Boiler Sequence In A Cascade 2 X Single-Stage - Siemens RVA63.242 User Manual

Benefits
Description
Setting
Effect
Example
Siemens Building Technologies
Landis & Staefa Division

Cascade

4.59 Changeover of boiler sequence in a cascade
2 x single-stage
Even load on the boilers of a cascade or fixed switching of boiler sequence can be
selected.
Different time intervals for changeover of boiler sequence can be set.
The parameter determines whether or not the switching on / off sequence of the boilers
shall be changed after an adjustable period of time.
Setting range
--- / 10...990
--- Fixed switching on / off sequence of the boilers in the cascade.
10...990 On completion of the number of operating hours set here, the switching
sequence of the boilers in the cascade will change. The other boiler will
then become the lead boiler.
Example of 2 single-stage boilers with a set differential of 100 operating hours.
P [kW]
1. Changeover
K 2
K 1
100
t Total number of operating hours of all lead boilers [h]
P Total output of cascade [kW]
Basic Documentation RVA63.242, RVA53.242
Description of heating engineer settings
Unit
– / hours
K 1 Lag boiler
lead boiler
K 2
200 300
Factory setting
500
t [h]
125/218
CE1P2373E
26.03.2001