Overview Of Pump Operation - Siemens RVA63.242 User Manual

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Description
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Siemens Building Technologies
Landis & Staefa Division

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):
Application
Q2 Pump HK1
Q2 Maintained boiler return
temperature valve
Q3 D.h.w. pump
K6
No function
K7 No function
K6 HK2
K7 HK2
K6 System pump after d.h.w.
K6 System pump before d.h.w. Runs when there is
K6
System pump external
demand
K6 D.h.w. circulating pump
D.h.w. circulating pump
K7
Electric immersion heater
K6
for d.h.w.
K7 Electric immersion heater
for d.h.w.
K6 Solar pump
K7 Solar pump
K6 Pump H1
K7
Pump H2
K6 Boiler pump
K6
Boiler bypass pump
K7 Boiler bypass pump
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
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.
Basic Documentation RVA63.242, RVA53.242
General control processes
Pump behavior with valid
by HC via H1 / H2
Runs when HK1
Does not run
demands heat
Runs when there is Runs when there is
demand for heat demand for heat
Does not run Does not run
Does not run Does not run
Runs when HK2 Does not run
demands for heat
Runs when there is Runs when there is
1)
demand for heat demand for heat
Runs when there is
1)
demand for heat demand for heat
Runs when there is
Does not run
demand for heat
No influence from type of heat demand.
Pump runs according to the setting made on line 122.
Does not run Does not run
No influence from type of heat demand.
Pump runs according to solar criteria.
Does not run Runs when there is
demand by H1
Does not run Runs when there is
demand by H2
Runs when there is
Runs when there
1)
demand for heat
is demand for
heat
Pump runs according to the setting made on operating line
24OEM.
).
OEM
2)
demand for heat:
by d.h.w.
Does not run
Runs when there
is demand for
heat
Runs when there
is demand for
heat
Does not run
Does not run
Does not run
Runs when there
is demand for
heat
Does not run
1)
Runs when
there is demand
for heat only in
summer
operation
Does not run
Does not run
Runs when there
is demand for
heat
CE1P2373E
26.03.2001