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7.5 Control modes
7.5.1 Pump setting for two-pipe heating systems
Fig. 16 Selection of pump setting for system type
Recommended and alternative pump settings according to fig.
16:
* See section 10.1 Guide to performance curves.
Proportional-pressure curve, PP1, PP2 or PP3
Proportional-pressure control adjusts the pump performance to
the actual heat demand in the system. The pump performance
follows the selected performance curve, PP1, PP2 or PP3. See
fig. 17 where PP2 has been selected. For further information, see
section 10.1 Guide to performance curves.
Fig. 17 Three proportional-pressure curves and settings
The selection of the proportional-pressure setting depends on the
characteristics of the heating system and the actual heat
demand.
7.5.2 Pump setting for one-pipe heating systems
Fig. 18 Selection of pump setting for system type
Recommended and alternative pump settings according to fig.
18:
* See section 10.1 Guide to performance curves.
Constant-pressure curve, CP1, CP2 or CP3
The constant-pressure control adjusts the flow rate to the actual
heat demand in the system keeping a constant pressure at the
same time. The pump performance follows the selected
performance curve, CP1, CP2 or CP3. See fig. 21 where CP1 has
been selected. For further information, see section 10.1 Guide to
performance curves.
Fig. 19 Three constant-pressure curves and settings
The selection of the constant-pressure setting depends on the
characteristics of the heating system and the actual heat
demand.
TM06 9102 4317
Heating
system
Pump setting
Recommended Alternative
Two-pipe
system
Proportional-pressure
curve PP1, PP2 or
PP3*
Constant-pressure
curve CP1, CP2 or
CP3*
TM07 0086 4117
TM06 9099 4317
Heating
system
Pump setting
Recommended Alternative
One-pipe
system
Constant-pressure
curve CP1, CP2 or
CP3*
Constant curve/constant
speed, I, II or III*
TM07 0087 4117
Q
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