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Siemens Building Technologies Basic Documentation RVA63.242, RVA53.242 CE1P2373E
Landis & Staefa Division General control processes 26.03.2001
6.13 Overview of pump operation
Straightforward checking of proper functioning of the various pumps.
Operation of the various pumps depends on a number of factors. To enable you to
quickly understand the different interrelationships when commissioning and checking
the plant, please make use of the list below. It provides information about the
combinations of settings (pump setting / heat demand) where a pump runs : The
meaning of the different pump settings is defined on setting lines 95 (K6) and 96 (K7):
Pump behavior with valid
2)
demand for heat:
Application by HC via H1 / H2 by d.h.w.
Q2 Pump HK1
Runs when HK1
demands heat
Does not run Does not run
Q2 Maintained boiler return
temperature valve
Runs when there is
demand for heat
Runs when there is
demand for heat
Runs when there
is demand for
heat
Q3 D.h.w. pump Does not run Does not run Runs when there
is demand for
heat
K6
No function
K7 No function
Does not run Does not run Does not run
K6 HK2
K7 HK2
Runs when HK2
demands for heat
Does not run Does not run
K6 System pump after d.h.w. Runs when there is
demand for heat
1)
Runs when there is
demand for heat
Does not run
K6 System pump before d.h.w. Runs when there is
demand for heat
1)
Runs when there is
demand for heat
Runs when there
is demand for
heat
K6
System pump external
demand
Does not run
Runs when there is
demand for heat
1)
Does not run
K6 D.h.w. circulating pump
K7
D.h.w. circulating pump
No influence from type of heat demand.
Pump runs according to the setting made on line 122.
K6
Electric immersion heater
for d.h.w.
K7 Electric immersion heater
for d.h.w.
Does not run Does not run
Runs when
there is demand
for heat only in
summer
operation
K6 Solar pump
K7 Solar pump
No influence from type of heat demand.
Pump runs according to solar criteria.
K6 Pump H1 Does not run Runs when there is
demand by H1
Does not run
K7
Pump H2
Does not run Runs when there is
demand by H2
Does not run
K6 Boiler pump Runs when there is
demand for heat
1)
Runs when there
is demand for
heat
Runs when there
is demand for
heat
K6
Boiler bypass pump
K7 Boiler bypass pump
Pump runs according to the setting made on operating line
24OEM.
The pumps in operation overrun when there is no more demand for heat (with the
exception of the d.h.w. circulating pump, electric immersion heater for d.h.w. and solar
pump). Also refer to pump overrun time (8
OEM
).
1)
Pump also overruns when there is demand for heat another controller integrated in
the (LPB) system.
2)
Reasons for an invalid demand for heat can be, for example:summer / winter
changeover, 24-hour heating limit, quick setback, or room temperature limitation by
room sensor.
Benefit
Description
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