Grundfos ALPHA
3191277
GRUNDFOS INSTRUCTIONS
Installation and operatin g instructi on s
LIMITED WARRANTY
Products manufactured by GRUNDFOS PUMPS CORPORATION (Grundfos) are
warranted to the original user only to be free of defects in material and workmanship
for a period of 36 months from date o f manu facture. Grundfos' liability un der this
warranty shall be limited to repairing or replacing at Grundfos' option, without
charge, F.O.B. Grundfos' factory or authorized service station, any product of
Grundfos' manufacture. Grundfos will not be liable for any costs of removal,
installation, transportation, or any other charges which may arise in connection with
a warranty claim. Products which are sold but not manufactured b y Grundfos are
subject to the warranty provided by the manufacturer of said products and not by
Grundfos' warranty. Grundfos will not be liable for damage or wear to products
caused by abnormal operating co ndition s, accident, a buse, misuse, u nauthorized
alteration or repair, or if the product was not installed in accordance with Grundfos'
printed installation and operating instructions.
To obtain service under this warranty , the defective product must be returned to the
distributor or dealer of Grundfos' products from which it was pu rchased togeth er
with proof of purchase and installation date, failure date, and supporting installation
data. Unless otherwise provided, the distributor or dealer will contact Grundfos or
an authorized service station for instructions. Any defective produ ct to be returned
to Grundfos or a service station must be sent freight prepaid; documentation
supporting the warranty claim and/or a Return Material Authorization must be
included if so instructed.
GRUNDFOS WILL NOT BE LIABLE FOR ANY INCIDENTAL OR
CONSEQUENTIAL DAMAGES, LOSSES, OR EXPENSES ARISING FROM
INST ALLATION, USE, OR ANY OTHER CAUSES. THERE ARE NO EXPRESS OR
IMPLIED WARRANTIES, INCLUDING MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE, WHICH EXTEND BEYOND THOSE WARRANTIES
DESCRIBED OR REFERRED TO ABOVE.
Some jurisdictions do not allow the exclusion or limitation of incidental or
consequential damages and some jurisdictions do not allow limi t actions on how
long implied warranties may last. Therefore, the above limitations or exclusions may
not apply to you. This warranty gives you specific legal rights and you may also
have other rights which vary from jurisdiction to jurisdiction .
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Grundfos ALPHA
Installation and operat ing instructions 4
Notice d’installation et d’entretien 11
Instrucciones de instalación y funcionamiento 19
4
Original installation and operating
instructions.
CONTENTS
Page
1. General
Grundfos Alpha is suitable for systems with
constant or variable flows where it is desirable to
optimize the setting of the pump duty point .
2. Shipment inspection
Examine the components carefully to make sure
no damage has occurred to the pump during
shipment. Care should be taken to ensure the
pump is NOT dropped or mishandled.Check to
see that these are included:
• One Grundfos Alpha pump
• One line cord or terminal box
• Two gaskets
• One installation and operating instructions
• One check valve
• One "Check Valve Installed" sticker
3. Pumped liquids
Grundfos Alpha is designed for pumping clean,
thin, non-aggressive and non-explosive liquids,
not containing solid particles, fibers or mineral oil.
For glycol usage as well as additional liquid
information see Section 10. Fault finding.
4. Pump installation
When making piping connections, be sure to
follow piping manufactures recommendations
and all code requirements for piping material.
• System should be properly flushed of debris
before pump installation.
• Insert check valve only if required; see fig. 1.
• Arrows on the pump housing indicate the
liquid flow direction through the pump.
• Install the pump with the motor shaft
horizontal; see fig. 2.
• Fit the two gaskets supplied to pump ends.
Fig. 1 Check valve installation
Fig. 2 Installation positions
1. General
4
2. Shipment inspection
4
3. Pumped liquids
4
4. Pump installation
4
5. Changing the power head position
5
6. Electrical installation
5
6.1 For line cord models
5
6.2 Terminal box models
6
7. Nameplate
6
8. Control display
6
9. Performance* and operation mode
selection
7
10. Fault finding
8
11. Disposal
8
12. Technical data
9
12.1 Approvals
10
13. Quick install tips
10
Warning
Prior to installation, read these
installation and operating
instructions. Installation and
operation must comply with
national, state, and local regulations
and accepted codes of good
practice.
Warning
The pump must not be used for the
transfer of flammable liquids such
as diesel oil, gasoline, and similar
liquids.
Pump not for pool or marine use.
Warning
Do not energize pump until properly
installed.
Risk of electric shock — this pump
has not been investigated for use in
swimming pool or marine areas.
TM 3422 4408TM04 3417 4408
5
5. Changing the power head
position
The power head orientation change should be
made before filling the system with fluid.
Pump liquid may be scalding hot and under high
pressure.
The power head can be rotated in steps of 90°.
Review fig. 3 for possible/permissible positions.
Only use orientations C and D for CSA
Enclosure Type 2.
Fig. 3 Changing the power head position
Procedure:
1. If fluid is present, drain system fluid from
pump or isolate system fluid from pump.
2. Loosen 4mm screws and turn the pump head
to desired position; see fig. 3.
3. Insert and cross-tighten the screws to 7 ft-lbs
torque.
6. Electrical installation
All electrical work should be performed by a
qualified electrician in accordance with the latest
edition of the National Electric Code and state,
local codes and regulations.
• The motor of Grundfos Alpha is protected by
the electronics in the control box and requires
no external motor protection.
• Check that the supply voltage and frequency
correspond to the values stated on the pump.
• Only connect the pump to the mains with the
line cord or through the terminal box supplied;
see fig. 4 and 5.
• Do not modify and only use cord set supplied
• Lights on the control panel indicate electrical
supply has been switched on.
6.1 For line cord models
Follow procedure outlined in fig. 4.
Fig. 4 Connecting and removing power plug
for line cord models
Warning
Before starting any work on this
circulator, make sure electrical
supply has been switched off and
that it cannot be accidentally
switched on.
TM04 3418 1010
Power head
orientation A
Power head
orientation B
Power head
orientation C
Power head
orientation D
Warning
Risk of electrical shock - This pump
is supplied with a grounding
conductor and grounding-type
attachment plug. 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.
TM04 3420 1010
1
2
3
Insert line cord plug onto pump
(side view).
To remove cord plug from pump:
(Bottom view)
1. Insert 1/8 in. flat blade
screwdriver into slot.
2. Rotate screwdriver.
3. Pull cord to remove.
6
6.2 Terminal box models
Wiring procedure:
1. Loosen terminal box screw from terminal box
cover.
2. Utilize either conduit port for wiring entrance.
3. Gently push open wiring terminal levers
(L-N-G) for wiring installation.
4. Slide terminal box cover over terminal box
body.
5. Tighten terminal box screw Phillips #1
(5 in-lbs).
6. Apply power.
7. Lights on the control panel indicate electrical
supply has been switched on.
Fig. 5 Terminal box wiring, 1 x 115V
7. Nameplate
Fig. 6 Nameplate
8. Control display
Fig. 7 Control display
TM04 7035 1410
Black
White
Green
Wiring terminal levers
TM04 3419 1410
Pos. D escription
1 Product Number
2 Production Code:
• 1st and 2nd figures = year
• 3rd and 4th figures = week
3Voltage (V):
4 Rated current (A):
• Min.: Minimum Current (A)
• Max.: Maximum Current (A)
5 Input power (W):
• Min.: Minimum Power (W)
• Max.: Maximum Power (W)
6 Max. fluid temperature (F)
TM04 3421 1010
Pos. Description
1 LED showing Watt or flow indicator
2 LED indicating fixed speed
3 LED indicating constant pressure
4 LED AutoADAPT
5
Push-button for selection of pump
setting
7
9. Performance* and operation mode selectio n
*Hydraulic performance without check valve
TM04 6882 1110
AUTOADAPT
Operating range
(maximum - minimum)
Pos. Description
• Push-button for selection of pump setting
• Every time the push-button is pressed, the circulator setting is changed
III
High Fixed Speed
• Runs at a constant speed and consequently on a constant curve. In Speed III, the pump is
set on the maximum curve under all operating conditions. Quick Vent of the pump can be
obtained by setting the pump to Speed III for a short period.
II
Medium Fixed Speed
• Runs at a constant speed and consequently on a constant curve. In Speed II, the pump is
set on the medium curve under all operating conditions.
I
Low Fixed Speed
• Runs at a constant speed and consequently on a constant curve. In Speed I, the pump is set
on the minimum curve under all operating conditions.
Constant Pressure I
• The duty point of the pump will move left and right along the lowest constant-pressure curve
depending on water demand in the system. The pump head (pressure) is kept constant,
irrespective of the water demand.
Constant Pressure II
• The duty point of the pump will move left and right along the middle constant-pressure curve
depending on water demand in the system. The pump head (pressure) is kept constant,
irrespective of the water demand.
Constant Pressure III
• The duty point of the pump will move left and right along the highest constant-pressure
curve depending on water demand in the system. The pump head (pressure) is kept
constant, irrespective of the water demand.
AutoADAPT (Factory Setting)
• This function controls the pump performance automatically within the defined performance
range (shaded area). AutoADAPT will adjust the pump performance to system demands
over time.
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10. Fault finding
11. Disposal
This product or parts of it must be disposed of in
an environmentally sound way; please use the
public or private waste collection service.
Warning
Before starting any work on this circulator, make sure electrical supply has been
switched off and that it cannot be accidentally switched on.
Pump liquid may be scalding hot and under high pressure.
Fault Control panel Remedy
1. The pump does not run LED off Check power supply (voltage) and
circuit breaker.
Check zone control; voltage, control
options, and thermostat.
Check all power connections.
Damaged circulator / replace.
LED on Check that the electricity supply falls
within the specified range.
Impeller blocked by impurities.
"
___ ___"
Requires turning power OFF and back
On to pump.
2. Noise in the system LED on Install air eliminator.
Reduce the pump speed.
Fluid velocities to high; reduce pump
speed.
Emitter or piping expanding.
3. Noise in the pump LED on Let the circulator run, will vent over time.
Increase the inlet pressure or check the
air volume in the expansion tank, if
installed.
No fluid (dry running).
Damaged circulator / replace.
4. Insufficient heat LED on Increase circulator speed or con stant
pressure.
Circulator in proper operating mode.
Check for air; piping, zone(s) and
emitter(s).
Check thermostat(s).
Check all valving.
Heat emitter large enough.
Check direction of flow.
Check water temperature from boiler
and boiler functions.
Check proper sizing of circulator.
Check ΔT calculation.
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12. Technical data
Supply voltage:
1x115V +/-10 %, 60Hz.
Motor protection:
The pump requires no external motor
protection.
Enclosure class:
Indoor use only, IP42.
CSA Enclosure Type 2.
Insulation class:
F.
Relative air humidity:
Maximum 95 %.
Maximum discharge pressure:
150 psi (10.34 bar).
Inlet pressure:
Sound pressure level:
43 dB (A).
Ambient temperature:
+32 °F (0 °C) to +104 °F (+40 °C).
Liquid temperature:
+36 °F (+2 °C) to +230 °F (+110 °C).
To avoid condensation in the control box and
stator, the liquid temperature must always be
higher than the ambient temperature.
Maximum glycol concentrations:
50 % glycol @ 36 °F (2 °C).
Hydraulic performance change can be expected.
Watt readings:
Accuracy +/-1 Watt.
Flow indicator:
Provides a relative indication of flow — should
not be used in lieu of a flow meter.
Check valve:
Use of check valve may reduce pump
hydraulic performance (up to -10%).
Use check valve in parallel pumping
applications.
Curve conditions:
Test liquid: Airless water.
Curves apply to a density of 983.2 kg/m
3
and a
liquid temperature of +140 °F (+60 °C).
All curves show average values and should
not be used as guarantee curves. If a specific
minimum performance is required, individual
measurements must be made.
Curves apply to a kinematic viscosity of 0.474
cSt.
Approximate power usage:
Liquid temperature Min. inlet pressure
167 °F (75 °C) 0.75 psi (0.05 bar)
194 °F (90 °C) 4.06 psi (0.28 bar)
230 °F (110 °C) 15.7 psi (1.08 bar)
Ambient
temperature
[°F (°C)]
Liquid temperature
Min. [°F (°C)] Max. [°F (°C)]
+32 °F
(0 °C)
+36 °F
(+2 °C)
+230 °F
(+110 °C)
+50 °F
(+10 °C)
+50 °F
(+10 °C)
+230 °F
(+110 °C)
+68 °F
(+20 °C)
+68 °F
(+20 °C)
+230 °F
(+110 °C)
+86 °F
(+30 °C)
+86 °F
(+30 °C)
+230 °F
(+110 °C)
+95 °F
(+35 °C)
+95 °F
(+35 °C)
+194 °F
(+90 °C)
+104 °F
(+40 °C)
+104 °F
(+40 °C)
+158 °F
(+70 °C)
Caution
In domestic hot-water system, it is
recommended to keep the liquid
temperature below +149 °F (+65 °C)
to eliminate the risk of lime
precipitation.
Speed setting Min. Max.
High fixed speed III 39W 45W
Medium fixed speed II 15W 30W
Low fixed speed I 5W 8W
Constant pressure 8W 45W
Constant pressure 14W 45W
Constant pressure 22W 45W
AutoADAPT 5W 45W
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