Grundfos Geo-Flo Universal Pump Controller - Page 33

  
Appendix F2: Non-Pressurized Variable Speed Flow Center Submials
GEO-FLO PRODUCTS CORPORATION
905 Williams Park Drive
Bedford, IN 47421 U.S.A.
PH: 812-275-8513; FAX: 812-275-8523
www.geo-o.com
SD 1276 rev. 02JAN2013
Pump Power Curves
Dimensional Data
*Requires two Flo-Link™ (double
O-ring) transion ngs. Typically, PE
fusion or PVC glue ngs are used for the
ground loop; a hose kit or PVC glue ng
is used for the heat pump connecon.
Flow center may be eld modied to a one
pump ow center by replacing the upper
constant speed pump with a blank plate.
*
Flow (U.S. GPM) [l/s]
Grundfos UPS26-99 Power Curves
Power (Was)
[0.13 0.25 0.38 0.50 0.63 0.76 0.88 1.00 1.14 1.26 1.39 1.51 1.64 1.77 1.89 2.02 2.15 2.27]
0 10 20 30 40
Flow (U.S. GPM) [l/s]
Grundfos Magna GEO 32-140 Power
0
50
100
150
200
250
Power (Was)
[0.63 1.26 1.89 2.52]
NOTES: The Magna GEO (variable speed)
pump adjusts speed (when used with con-
troller) to maintain ow rate or tempera-
ture dierence. The controller energizes
the constant speed pump (UPS26-99) when
the Magna GEO cannot meet setpoint, and
adjusts the Magna GEO pump accordingly.
Total ow center Was equals constant
speed pump Was plus Magna GEO Was
at design condions. For Was based upon
a specic ow rate and pressure drop, go to
www.geo-o.com, and use the pump sizing
calculator.
56.0 25.4