Grundfos ALPHA1 Series User Manual

8
English (US)
4.4.2 For pump models with terminal box
1. Loosen the terminal box screw from the
terminal box cover.
2. Utilize either conduit port for the wiring
entrance.
3. Wire the plug connector as illustrated in the
section Wiring procedure below, steps 3a-
3d. Then complete steps 4-7.
Wiring procedure
4. Slide the terminal box cover over the
terminal box body.
5. Tighten the cross-head screw on the terminal
box to 5 in-lbs.
6. Switch on the power supply.
7. The lights on the control panel will then
indicate that the power supply has been
switched on.
Be sure to connect the ground cable
conductor (green) of the pump to the
ground cable conductor of the power
supply.
Step Action Illustration
3a
Strip the ends of the cable conductors as
illustrated.
TM06 8250 4816
3b
Align the end of each of the pump's cable
conductors, including any frayed strands,
with the end of the corresponding cable
conductor from the power supply.
Green conductor: ground
Black conductor: line
White conductor: neutral
TM06 8253 4816
3c
Insert the ends of the cable conductors
into the connector.
Push the cable conductors fully into the
connector.
TM06 8251 4816
3d
Twist the connector until you see two
twists in the cable conductors.
TM06 8252 4816
0.4 in.
(10 mm)
Cable conductor
from the pump
Cable conductor
from the power
supply

Grundfos ALPHA1 Series Specifications

General

Series	ALPHA1
Voltage	230 V
Temperature Range	2°C to 110°C
Max Operating Pressure	10 bar
Enclosure Class	IP42
Insulation Class	F
Type	Circulation Pump
Frequency	50 Hz
EEI (Energy Efficiency Index)	0.20
Material	Cast iron
Connection Size	1"