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1.3 Features
Features overview
Feature ALPHA2 15-55 ALPHA1 15-55 ALPHA2 26-99 ALPHA1 26-99
ALPHA 15-55
HWR-D/T
For heating and cooling systems ✔ ✔ ✔ ✔ -
For hot water recirculation systems ✔ ✔ - - ✔
Energy efficient permanent magnet motor ✔ ✔ ✔ ✔ ✔
Simple operating panel ✔ ✔ ✔ - ✔
External speed control via low voltage 0-10 VDC signal - - - ✔ -
AUTOAdapt control mode automatically adjusts the
performance
✔ - ✔ - -
Three constant speed modes ✔ - - - -
Three constant pressure modes ✔ ✔ ✔ - -
Three proportional pressure settings - - ✔ - -
Cast iron pump housing ✔ ✔ ✔ ✔ -
Stainless steel pump housing ✔ ✔ ✔ - ✔
LED display shows current energy consumption and
estimated flow
✔ ✔ - - -
Integrated check valve ✔ ✔ - ✔ ✔
Line cord connection ✔ ✔ - - ✔
Terminal box connection ✔ ✔ ✔ ✔ -
Max. head [ft (m)] 19 (5.8) 19 (5.8) 42 (12.8) 42 (12.8) 17 (5.1)
Max. flow [gpm (m
3
/h)]
21 (4.8) 21 (4.8) 26 (5.9) 26 (5.9) 16.5 (3.7)
Flanged connection for quick installation ✔ ✔ ✔ ✔ -
1 1/4" NPSM (union) connection - - - - ✔
1 1/2" BSP (union) connection - - ✔ - -
Nut captures for flanges ✔ ✔ - - -
Magnetite-resistant design helps prevent deposits and
blockages with robust ceramic shaft, ceramic bearing rings,
and stainless steel bearing plate
✔ ✔ ✔ ✔ ✔
Manual summer mode starts the pump every 24 hours to
protect against deposits
✔ - - - -
Robust startup feature enables the pump to continuously
attempt to restart in blocked rotor conditions
✔ ✔ - - -
Foam insulating jacket for some models ✔ * - - -
Replaces more than 30 other pump models ✔ ✔ - - -
Bluetooth
TM
enabled wireless communication with
accessories
- - - - ✔
* Available as an accessory for ALPHA1 15-55.
ALPHA
1
6
Product data