Grundfos ALPHA1 Series User Manual

5
English (US)
4. Installing the product
4.1 Quick installation tips
1. To ensure proper venting of your system,
place the pump in "Constant Pressure III"
mode until all air has been removed.
Isolating zones during this process will
ensure proper air removal.
2. For balancing manifold zone(s) applications,
utilizing modes "Constant Pressure I" or
"Constant Pressure II" and only one zone at
a time during balancing will ensure proper
flow rate to each zone.
3. Always review your boiler minimum flow rate
requirements if utilizing the pump as a
primary pump. Select one of the constant
pressure modes for boiler primary pump
applications. You may change hydraulic
selection while pumping. No permanent
damage will occur. In fact, Grundfos
encourages testing the various hydraulic
modes with your hydronic system to ensure
maximum energy savings and comfort level.
4. With zone panel control applications, when
there is a call for heat and power has been
sent to the pump, the pump will remember
and restart from the last duty point and
hydraulic mode.
4.2 Mechanical installation
When making pipe connections, follow the
piping manufacturer's recommendations and all
code requirements for the piping material.
• Flush the system of debris before
installation.
• Insert the check valve if required. See fig. 1.
• Refer to the arrows on the pump housing
indicating the direction of the liquid flow
through the pump.
• Install the pump with horizontal motor shaft.
See fig. 2.
• Fit the two gaskets supplied to the pump
ends.
Fig. 1 Check valve installation
Fig. 2 Installation positions
WARNING
Pressurized system
Death or serious personal injury
- Before dismantling the pump, drain
the system or close the isolating
valve on either side of the pump
before you remove the screws. The
pumped liquid may be scalding hot
and under high pressure.
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.
DANGER
Electric shock
Death or serious personal injury
- This pump has not been
investigated for use in swimming
pool or marine areas.
TM04 3422 4408
TM06 8959 1417

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"