Brochure

1.2 Applications
ALPHA2 15-55 and ALPHA1 15-55 applications
The ALPHA2 15-55 and ALPHA1 15-55 circulators are
designed for the circulation of water in heating systems,
domestic hot water systems as well as air-conditioning and
cold water systems. Cold water systems are defined as
systems where the ambient temperature is higher than the
temperature of the pumped liquid.
ALPHA2 15-55 and ALPHA1 15-55 circulators are the best
choice for the following systems:
• One pipe systems.
• Two pipe systems.
• Underfloor heating.
• Domestic hot water recirculation.
• Systems with constant or variable flows where you want
to optimize the setting of the pump duty point.
• Systems where summer setback is required (ALPHA2
15-55).
ALPHA2 26-99 and ALPHA1 26-99 applications
ALPHA2 26-99 and ALPHA1 26-99 circulator pumps are
designed for circulating liquids in heating and air-
conditioning systems.
These circulators are equipped with a conduit box for easy
installation of the power cable.
ALPHA2 26-99 models are internally controlled and are
designed for systems with variable flow rates, where the
pump is internally controlled via a user interface. Speed
control can reduce power consumption considerably.
ALPHA1 26-99 models are externally controlled via a low-
voltage 0-10 VDC signal by a system controller integrated in
a boiler or a building management system. The pump will
run at its minimum speed if no signal is present or the signal
fails.
ALPHA 15-55 HWR-D applications
The ALPHA HWR-D system is an on-command hot water
recirculation system for use in domestic hot water
applications. It provides optimal comfort by providing hot
water instantly on demand.
ALPHA
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Product data