Grundfos ALPHA 26-99 User Manual

6
English (US)
Ground fault circuit interrupter (GFCI)
If the pump is connected to an electrical
installation where a ground fault circuit
interrupter (GFCI) is used for additional
protection, this Ground Fault Circuit Interrupter
must be able to trip when ground fault currents
with DC content occur.
Fig. 2 GFCI connection diagram
3.3.1 Power supply connection
• UL-approved ALPHA1 26-99/ALPHA2 26-99
circulators are equipped with a conduit box
for easy installation of the power cable.
• The motor is protected by the electronics in
the control box and requires no external
motor protection.
• The pump can be connected to the power
supply by a 3-wire cable with protective earth
(ground) connection.
Fig. 3 Conduit box connection
WARNING
Electric shock
Death or serious personal injury
- Use a suitable type of GFCI
capable of handling ground fault
currents with DC content (pulsating
DC).
TM07 0540 0218
DANGER
Electric shock
Death or serious personal injury
- All electrical work must be carried
out by a qualified electrician in
accordance with the latest edition
of the National Electric Code and
state, local codes and regulations.
DANGER
Electric shock
Death or serious personal injury
- Switch off the power supply before
starting any work on the product.
Make sure that the power supply
cannot be accidentally switched on.
WARNING
Electric shock
Death or serious personal injury
- This pump is supplied with a
grounding conductor. To reduce the
risk of electric shock, be certain
that it is connected only to a
properly grounded, grounding-type
receptacle in accordance with the
National Electric Code and any
state, local governing codes and
regulations.
L
N
L
N
GFCI
External switch
Fuse
WARNING
Electric shock
Death or serious personal injury
- The connection to the fixed wiring
systems must be made using a
flexible conduit system only.
- The terminal block is suitable for
copper conductors only.
Do not use the pump with an external
speed control which varies the supply
voltage, for example phase-cut or
pulse-cascade control.
Do not connect the pump using rigid
conduit connections.
Check that the supply voltage and
frequency correspond to the values
stated on the pump.
All cables and connectors used must
be connected in accordance with local
regulations.
The protective earth (ground) symbol
identifies any terminal which is
intended for connection to an
external conductor for protection
against electrical shock in case of a
fault, or the terminal of a protective
earth (ground) electrode.
TM07 0541 0218
LN
Black - line
Green - PE (ground)
White - neutral

Grundfos ALPHA 26-99 Specifications

General

Model	ALPHA 26-99
Category	Water Pump
Max Operating Pressure	10 bar
Type	Circulation Pump
Voltage	230 V
Frequency	50 Hz
Operating Temperature Range	2°C to 110°C