Overview Of Pump Operation - Siemens RVA47.320 User Manual

Benefit
Description
142/166
Siemens Building Technologies
HVAC Products
7.8

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 setting
combinations (pump settings / demand for heat) at which a pump runs (the meaning of
the different pump settings is defined on operating line 95).
Pumps
Settings via HC:
Pump runs when
Q1
there is demand for
Setting 1
heat
* Pump runs when
Q1
there is demand for
Setting 2
heat
* Pump runs when
Q1
there is demand for
Setting 3
heat
No influence from type of heat demand. Pump runs according to
Q1
Setting 4
Q1
Pump does not run
Setting 5
Q3
Pump does not run
Setting 1
* = the pump also runs when the demand for heat comes from another controller integrated via LPB
When there is no more demand for heat, the pumps in operation overrun for the period
of time set on line "Pump overrun time" (8
circulating pump, Q1 setting 4.
There are situations, however, where the pumps (with the exception of pump H1, Q1
setting 5) do not run, for example with:
•
Summer / winter changeover
•
24-hour heating limit
•
Quick setback
•
Room temperature limitation by room sensor
Basic Documentation RVA47.320
Functions with no settings
Demand for heat
Input H1
Pump does not run
Pump runs when
there is demand for
heat
Pump runs when
there is demand for
heat
the settings made on operating line 122.
Pump runs when
there is demand for
heat
Pump does not run
), with the exception of the d.h.w.
OEM
via d.h.w.:
Pump does not run
Pump does not run
* Pump runs when
there is demand for
heat
Pump does not run
Pump runs when
there is demand for
heat
CE1P2379E
15.07.2002