Brochure

1. Product data
1.1 Product introduction
Grundfos ALPHA circulators are medium-sized, speed-
controlled, high-efficiency pumps fitted with an electronically
commutated motor with permanent-magnet rotor and
variable frequency drive. Grundfos ALPHA circulators are
designed for domestic building applications such as:
• circulating liquids in heating systems
• hot water recirculation
• air conditioning and cooling systems.
The canned-rotor type pump and motor form an integral unit
without a shaft seal with two gaskets for sealing and four
screws for fastening the stator housing to the pump housing.
The bearings are lubricated by the pumped liquid.
TM074556
ALPHA2 15-55
ALPHA2 15-55
ALPHA2 15-55 features:
• Three constant pressure modes
• Three constant curve modes
• AUTOAdapt
The AUTOAdapt function continuously adjusts the pump
performance to the actual heat demand, i.e. the size of the
system and the changing heat demand during the year. The
function will find the setting that provides optimal comfort
with minimal energy consumption. It contributes to fast, safe
and easy commissioning.
Other features:
• A user-friendly front-mounted user interface.
• Easy installation and start-up. With the AUTOAdapt
feature (factory setting), the pump does not need any
adjustments to the settings in most cases.
• High degree of comfort.
• Minimum noise from valves, etc.
• Low energy consumption compared to conventional
circulator pumps.
TM074558
ALPHA1 15-55
ALPHA1 15-55
ALPHA1 15-55 features:
• Three constant pressure control modes.
• An energy-efficient replacement for older circulator
pumps.
• User-friendly front-mounted user interface.
• Easy installation and start-up.
• High degree of comfort.
• Minimum noise from valves, etc.
• Low energy consumption compared to conventional
circulator pumps.
TM074557
ALPHA2 26-99
ALPHA2 26-99
ALPHA2 26-99 features eight different control modes
including constant pressure AUTOAdapt and proportional
pressure AUTOAdapt.
The AUTOAdapt function continuously adjusts the pump
performance to the actual heat demand, i.e. the size of the
system and the changing heat demand during the year. The
function will find the setting that provides optimal comfort
with minimal energy consumption. It contributes to fast, safe
and easy commissioning.
ALPHA
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Product data