Taco SKV SelfSensing

Taco® SKV
36 302-365, Effective: June 5, 2017
© 2017 Taco, Inc.
10.5 Constant Pressure Control
SelfSensing pumps can be configured to maintain a con-
stant pump head in a system as the demand varies. This
effectively simulates the mounting of a differential pres-
sure sensor at, or near, the pump.
Figure 10-3: Constant Pressure Graph
10.5.1 Settings for Constant Pressure
Control
To revert to this mode of control simply follow these
steps:
1. Set the design head, H
DESIGN
, value in par. 20-21 (Set-
point 1) in the units set in par. 20-12 (Reference/Feed-
back Unit).
2. Turn off flow compensation by setting par. 22-80 to
‘Disabled’ [0].
10.6 Sequencing (Standby Pump
Alternation)
10.6.1 Onboard Pump Sequencer
The SelfSensing pump is equipped with a built-in pump
sequencer. The sequencer alternates 2 pumps back and
forth according to a time interval. The factory default is 24
hours. The maximum value is 99 hours. If the duty pump
has a fault or failure, the duty pump stops and the waiting
pump automatically starts.
For detailed connections and settings for the pump’s
onboard pump sequencer see “Appendix A: Set-Up for
Standby Pump Alternation” on page 78.
10.6.2 External Pump Sequencers
The SelfSensing pump can be sequenced with external
pump sequencers.
For external sequencer wiring instructions, see “8.4.5
Control from external PLC/BMS through Analog Input” on
page 26.