Brochure

Applications
UP Series
24
ALPHA
The Grundfos Alpha is the next generation of energy
efficient wet-rotor circulators. By incorporating a
permanent magnet motor design, power consumption
is now reduced by a minimum of 50 %.
By using the AutoADAPT™ feature, Grundfos ALPHA
will automatically analyze the system demands and
adjust head and or flow requirements to meet changing
heating demands.
Standard features
• Permanent magnet motor design
• Easy push button hydraulic selection
• Seven hydraulic selection options
- Three fixed speeds
- Three constant pressures
- AutoADAPT™
• Easy to read LED display
- Flow indicator (gpm)
- Power consumption (watts)
- Hydraulic selection
• Nut capture flange
• Metallurgical options
- Cast iron (F or FR)
- Stainless steel (F)
• Line cord or conduit connection options
Additional technical data
Control display
Max. operating pressures
Max. operating temperatures
Supply voltage: 1x115V +/-10 %, 60Hz
Motor protection: Pump requires none.
Enclosure class:
Indoor use only, IP42,
CSA Enclosure Type 2
Insulation class: F
Relative air humidity: Maximum 95 %
Max. discharge press.: 150 psi (10.34 bar)
Sound pressure level: 43 dB (A)
Ambient temp.: +32 °F (0 °C) to +104 °F (+40 °C)
Liquid temp.: +36 °F (+2 °C) to +230 °F (+110 °C)
Max. glycol
concentrations:
50 % glycol @ 36 °F (2 °C)
(Hydraulic performance change can be
expected.)
Watt readings: Accuracy +/-1 Watt
Flow indicator:
Provides a relative indication of flow —
should not be used in lieu of a
flow meter.
Check valve:
Use of check valve may reduce pump
hydraulic performance (up to -10%).
Use check valve in parallel pumping
applications.
Position Description
1 Watt or flow indicator
2 Three fixed speeds
3 Three constant pressure settings
4AUTOADAPT
5 Push-button for selction of pump settings
Liquid temp. Min. inlet press.
167 °F (75 °C) 0.75 psi (0.05 bar)
194 °F (90 °C) 4.06 psi (0.28 bar)
230 °F (110 °C) 15.7 psi (1.08 bar)
Ambient temp. Liquid temp.
[°F (°C)] Min. [°F (°C)] Max. [°F (°C)]
+32 °F (0 °C) +36 °F (+2 °C) +230 °F (+110 °C)
+50 °F (+10 °C) +50 °F (+10 °C) +230 °F (+110 °C)
+68 °F (+20 °C) +68 °F (+20 °C) +230 °F (+110 °C)
+86 °F (+30 °C) +86 °F (+30 °C) +230 °F (+110 °C)
+95 °F (+35 °C) +95 °F (+35 °C) +194 °F (+90 °C)
+104 °F (+40 °C) +104 °F (+40 °C) +158 °F (+70 °C)