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8.2 VENTING THE PUMP
Even with system vented, air may be still be present in the
pump. The air in the pump may cause noise but the noise
should cease after a few minutes running.
The venting process can be shortened by setting the pump to
run at speed III for a short period of time (20 seconds).
Once the pump is vented and (the noise has ceased), set the
pump mode according to the recommendations (see
sections 6).
CAUTION
The pump must not run dry.
9. PUMP SETTINGS AND PUMP
PERFORMANCE
9.1 RELATION BETWEEN PUMP SETTING AND PUMP PER-
FORMANCE
24
22
20
18
16
14
pc4
pc3
auto
12
10
pc2
8
6
4
2
0
0
2
4
6
8
speed
pressure curve
iii
ii
i
aut o
Fig. 11. Pump setting in relation to pump performance
pc1
iii
i
ii
10
12
14
16
18
20
flow - us gpm
pc4
pc3
pc2
pc1
AQUAPUMP VARIABLE SPEED CIRCULATING PUMPS
Select the optimum setting:
The AquaPUMP variable speed circulator comes with 9
modes of operation.
There are three fixed speed curve options which will operate
just like traditional fixed speed circulators, except that
AquaPUMP variable speed motor technology is far more
energy efficient than traditional fixed speed circulators.
The proportional pressure curves operate as Sensorless
differential pressure circulators. These curves follow pre-
selected performance curves and will reduce flow and energy
consumption when the valves in the system close or open
and the flow requirements are reduced.
The constant pressure curves and auto mode maintain
preselected pressure ratings at the circulator.
Auto mode operates on the sensorless differential pressure
principle, but will learn usage patterns and adjust circulator
performance over time to optimize energy efficiency. The
operating point will be within the gray envelope seen in Fig.
11.
22
7
33-00543EF—01
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