Install Instructions

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)