6.3 Intended use
The ALPHA 15-55 HWR-D system is intended for
domestic hot-water recirculation. When you
activate the system with the HWR-D push-button,
the pump starts circulating hot water.
To prevent continuous operation, the pump stops
recirculating water again when:
a) the media temperature measured at the
temperature sensor has increased by 10 °F or is
higher than 102 °F.
or
b) the pump has been operating continuously for
more than 5 minutes, or for a total of 15 minutes
during the last hour.
If the system is operated without the temperature
sensor, the pump will stop according to b).
6.4 Pumped liquids/media
CAUTION
Chemical hazard
Minor or moderate personal injury
‐
Do not use the pump for flammable
liquids, such as diesel or gasoline.
WARNING
Biological hazard
Death or serious personal injury
‐
In domestic hot-water systems, the
temperature of the pumped liquid
must always be above 122 °F (50
°C) due to the risk of legionella.
WARNING
Biological hazard
Death or serious personal injury
‐
In domestic hot-water systems, the
pump is permanently connected to
the main water supply. Therefore,
do not connect the pump by a
hose.
WARNING
Hot water
Death or serious personal injury
‐
If the hot water temperature is too
high, it can cause severe burns or
scalding.
‐
Ensure that the temperature of the
hot water source is not high
enough to cause burns or scalding.
CAUTION
Corrosive substance
Minor or moderate personal injury
‐
Do not use the pump for
aggressive liquids such as acids or
seawater.
The pump is suited for domestic hot water.
Maximum: 14 °dH
Maximum: 149 °F (65 °C)
Maximum peak: 158 °F (70 °C).
For water with a higher degree of hardness,
contact Grundfos.
6.5 Identification
6.5.1 Nameplate for ALPHA 15-55 HWR-D
Prod. No. XXXXXXXX
CSA ENC 2
Nonsubmersible Pump
Electronically Protected Class F
Min
Amp
Max water temp 230° F
1
2
3
4
5
6
Max
Watt
1 Ph 115V 60Hz
TM072175
Fig.
Nameplate
Pos.
Description
1
Product number
2
Voltage [V]
3
Rated current [A]:
Min.: Minimum current [A]
Max.: Maximum current [A]
4
Input power [W]
Min.: Minimum power [W]
Max.: Maximum power [W]
5
Maximum liquid
temperature [°F]
6
FCC and IC ID
12
English (US)
