Grundfos Geo-Flo Universal Pump Controller Installation, Operating And Maintenance Manual page 33

Appendix F2: Non-Pressurized Variable Speed Flow Center Submittals
Pump Power Curves
Grundfos UPS26-99 Power Curves
[0.13 0.25 0.38 0.50 0.63
Dimensional Data
0.76 0.88 1.00 1.14 1.26 1.39 1.51
Flow (U.S. GPM) [l/s]
GEO-FLO UNIVERSAL PUMP CONTROLLER: UPC-GEO | 31
NOTES: The Magna GEO (variable speed)
pump adjusts speed (when used with con-
troller) to maintain flow rate or tempera-
ture difference. The controller energizes
the constant speed pump (UPS26-99) when
the Magna GEO cannot meet setpoint, and
adjusts the Magna GEO pump accordingly.
Total flow center Watts equals constant
speed pump Watts plus Magna GEO Watts
at design conditions. For Watts based upon
a specific flow rate and pressure drop, go to
www.geo-flo.com, and use the pump sizing
calculator.
250
200
1.64 1.77 1.89 2.02 2.15 2.27]
150
100
50
0
0
*Requires two Flo-Link™ (double
Flow center may be field modified to a one
pump flow center by replacing the upper
constant speed pump with a blank plate.
Grundfos Magna GEO 32-140 Power
10 20 30
[0.63 1.26 1.89
Flow (U.S. GPM) [l/s]
*
56.0 25.4
O-ring) transition fittings. Typically, PE
fusion or PVC glue fittings are used for the
ground loop; a hose kit or PVC glue fitting
is used for the heat pump connection.
GEO-FLO PRODUCTS CORPORATION
905 Williams Park Drive
Bedford, IN 47421 U.S.A.
PH: 812-275-8513; FAX: 812-275-8523
www.geo-flo.com
SD 1276 rev. 02JAN2013
40
2.52]