Grundfos MQ 3-35 User manual

GRUNDFOS INSTRUCTIONS
MQ
Installation and operating instructions
US
C

2

3
Table of contents
MQ
English (US)
Installation and operating instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Español (MX)
Instrucciones de instalación y operación. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Français (CA)
Notice d'installation et de fonctionnement . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
Appendix 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56

4
English (US)
English (US) Installation and operating instructions
Original installation and operating instructions.
CONTENTS
Page
1. 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 24 months from date of
installation, but not more than 30 months from date
of manufacture. Grundfos' liability under 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 by 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 conditions,
accident, abuse, misuse, unauthorized 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 purchased
together 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 product 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
INSTALLATION, 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 limit 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.
1. Limited warranty 4
2. Symbols used in this document 5
3. Introduction 5
4. Items supplied 5
5. Applications 5
5.1 Pumped liquids 5
6. Identification 6
6.1 Type key 6
7. Operating conditions 7
7.1 Suction lift 7
8. Mechanical installation 8
8.1 Location 8
8.2 Foundation 8
8.3 Space requirement 9
8.4 Pipework 9
8.5 Protective cover 10
9. Electrical connection 11
9.1 Generator or inverter 11
9.2 Wiring diagram 12
9.3 Winding resistance measurement 12
9.4 Winding resistance measurement 13
9.5 Startup 14
10. Functions 15
10.1 Control panel 15
10.2 Pump stop 16
11. Maintenance 17
11.1 Service kits 17
11.2 Shaft seal run-in 17
11.3 Start-up after a long period of inactivity 17
12. Service 17
13. Technical data 18
13.1 Dimensions 18
13.2 Electrical data 18
13.3 Approvals 18
14. Accessories 18
15. Fault finding chart 19
16. MQ frequently asked questions 20
17. Disposal 20
Warning
Prior to installation, read these
installation and operating instructions.
Installation and operation must comply
with local regulations and accepted
codes of good practice.

5
English (US)
2. Symbols used in this document
3. Introduction
The MQ is a low-noise water supply system
consisting of pump, motor, pressure tank and
controller combined into one compact unit.
The system is suitable for both indoor and outdoor
use.
The self-priming pump starts automatically when
water is consumed in the installation and stops when
consumption ceases. The internal, built-in non-return
valve prevents backflow during priming and
operation.
The MQ pump incorporates overtemperature and
dry-running protection as well as a user-friendly
control panel.
The built-in pressure tank reduces the number of
starts and stops in case of leakage in the installation.
4. Items supplied
The MQ packaging contains these items:
• MQ water supply system with built-in non-return
valve
• non-return inlet valve in plastic bag
• installation and operating instructions.
5. Applications
The MQ water supply system is designed for these
typical applications:
• water pressure boosting
(maximum inlet pressure: 40 psi)
• water supply from wells
(maximum suction lift: 25 ft), for example
– in private homes
– on farms
– in market gardens and other large gardens.
The pump is suitable for rain water.
5.1 Pumped liquids
Thin, clean, non-aggressive liquids, not containing
solid particles or fibres.
Warning
If these safety instructions are not
observed, it may result in personal
injury.
Caution
If these safety instructions are not
observed, it may result in malfunction
or damage to the equipment.
Note
Notes or instructions that make the job
easier and ensure safe operation.

6
English (US)
6. Identification
6.1 Type key
Fig. 1 MQ water supply system. Protective cover is required for outdoor use.
Example MQ 3 -35 A -O -A BVBP
Pump type
Rated flow rate [m3/h]
Head [m]
Code for pump version
A: Standard
Code for pipework connection
Code for materials
A: Standard
Code for shaft seal
TM04 3648 4908
Base plate
Drain plug
Suction port
Priming plug
Discharge port Control panel Pressure tank cover
End-cover plug
Protective cover
(accessory)

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English (US)
7. Operating conditions
7.1 Suction lift
The maximum suction lift of the pump can be
determined from the diagram, page 56.
Example:
If the suction lift is 10 ft, the length of the suction pipe
must not exceed 72 ft.
MQ 3-35 MQ 3-45
Maximum flow rate [gpm] 22
Maximum inlet pressure [psi] 40
Pump discharge range [psi] 15-49 18-63
Maximum combined discharge pressure: Max.
Inlet + pump discharge range [psi] 55-89 58-103
Maximum suction lift [ft]; see page 56 25
Minimum ambient temperature [°F]/[°C] 32/0
Maximum ambient temperature [°F]/[°C] 113/45
Minimum liquid temperature [°F]/[°C] 32/0
Maximum liquid temperature [°F]/[°C] 95/35
Net weight [lbs] 29
Sound pressure level [dB(A)] < 70
Tank volume [oz] 13.5
Air pressure in tank [psi] 22 to 25
Connections 1" NPT
Priming and drain plugs 3/8" GAS

8
English (US)
8. Mechanical installation
8.1 Location
The pump is suitable for indoor and outdoor
installation. It is resistant to sunlight.
8.2 Foundation
Mount the pump on the base plate with horizontal
suction port and vertical discharge port.
The pump must be installed horizontally.
The maximum permissible inclination angle is ± 18 °.
See fig. 2.
Fig. 2 Horizontal installation of MQ
To prevent movement and vibrations, the pump and
base plate can be secured to a solid foundation by
means of the bolt holes in the base plate.
For pipework connection, see section 8.4 Pipework.
The bolt holes are covered by a thin plastic layer that
must be knocked out before use. See fig. 3.
Fig. 3 Knocking out the plastic layer in bolt
hole
Fig. 4 Base plate
Note
For outdoor installation, the pump
must be fitted with a protective cover
(accessory). See section 8.5 Protective
cover and 14. Accessories.
Caution
Should the unlikely event of an internal
leakage occur, pumped liquid will be
drained out from the base and/or end
cover instead of damaging the pump.
Install the pump in such a way that no
undesirable collateral damage can
arise.
TM01 9691 2600
Max. ± 18 °
TM05 5156 3412TM01 9692 2600
11.4 cm
19.0 cm

9
English (US)
8.3 Space requirement
For inspection and service, allow a minimum
clearance of 6" behind the pump.
Fig. 5 Minimum clearance behind the pump
Being self-cooling, the pump requires no space or
ventilation at the sides.
8.4 Pipework
The pump is supplied with 1" NPT screwed
connections. Fit the connections in the suction and
discharge ports. See fig. 6. The pump discharge port
is flexible, ± 5 °, to facilitate the fitting.
Fig. 6 Fitting of screwed connections in suction
and discharge ports
Carefully screw the discharge connection into the
discharge port, using a spanner or similar tool.
Hold the discharge connection, and tighten the pump
discharge union nut with your hand. See fig. 7.
Fig. 7 Correct: Tighten the discharge union nut
with your hand
Fig. 8 Wrong: Do not use a tool to tighten the
discharge union nut
8.4.1 Suction pipes connected to a well
If the pump draws water from a well, we recommend
to fit a foot valve to the end of the suction pipe.
See fig. 9.
Fig. 9 Suction pipes connected to a well
TM04 3746 5008
Note
Ensure that the maximum ambient
temperatures do not exceed the values
stated in section 7. Operating
conditions.
Note
Never use unnecessary force when
connecting the pipes.
TM01 9698 2600
6"
TM04 4271 1009TM 044272 1009TM01 9693 2600
Foot valve

10
English (US)
8.4.2 Suction hose instead of pipe
If a suction hose is used instead of a pipe, the hose
should not exceed the lengths stated in the graph,
page 56. The suction hose must be minimum ∅1".
The hose must be of the non-collapsible type.
8.4.3 Long suction pipes
A separate non-return inlet valve is supplied with the
pump. In case of long suction pipes, we recommend
to fit the non-return inlet valve in the pump suction
port. See section 8.4.4 Fitting of the non-return inlet
valve
The pipes must be adequately supported on either
side of the pump to avoid straining the pump
connections.
8.4.4 Fitting of the non-return inlet valve
The non-return inlet valve reduces the risk of losing
pump priming in negative suction applications and
improves the auto-aspiration capability, for example
in water supply from a cistern.
Install the non-return inlet valve as follows,
see fig. 10:
1. Remove the suction connection of the pump.
2. Fit the non-return inlet valve into the suction port
in the direction shown in fig. 10.
3. Refit the pump connection.
Fig. 10 Fitting of non-return inlet valve
8.5 Protective cover
The protective cover protects the control panel
against the weather. It is available as an accessory.
See section 14. Accessories.
To fit the protective cover, click the cover onto the
top of the control panel so that it engages with the
top cooling ribs.
To remove the cover, pull the two clips outwards, free
of the cooling ribs, and pull the cover upwards.
Fig. 11 Protective cover
Note
Applications with positive inlet
pressure do not require installation of
the non-return inlet valve due to the
fact that the MQ pump incorporates an
internal non-return valve at the
discharge side.
TM04 4121 0809
Note
Failure to use the protective cover in
outdoor installations will invalidate the
warranty.
TM04 3745 5008

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English (US)
9. Electrical connection
The electrical connections and additional protection
should be carried out by qualified persons in
accordance with local regulations.
The operating voltage and frequency are marked on
the nameplate. Make sure that the motor is suitable
for the electricity supply on which it will be used.
The pump must be connected to the mains via a
sheathed cable with a protective ground lead.
It is possible to replace the mains supply cable.
See fig. 12.
Fig. 12 Electrical connection
Connect the mains supply cable of the pump to the
electricity supply. When the cable is connected, a red
and a green indicator light on the control panel will
be on. See fig. 13.
Fig. 13 When mains supply cable is connected,
these two indicator lights will be on
9.1 Generator or inverter
Warning
Non-submersible pump.
If the power cord is damaged, it must
be replaced by the manufacturer, an
authorized service center or by a
qualified person in order to avoid risks.
Never make any connections in the
pump terminal box unless the
electricity supply has been switched
off for at least 5 minutes.
Risk of electric shock:
This pump is supplied with a grounding
conductor and grounding type
attachment plug. To reduce the risk of
electric shock, install only on circuit
protected by a Ground-Fault-Circuit-
Interrupter (GFCI).
This pump is not intended, nor has it
been investigated for use in swimming
pool or marine areas.
This pump has been evaluated for use
with water only.
Do not start the pump until it has been
filled with water (primed, see fig. 14).
Acceptable for indoor and outdoor use.
Enclosure type 3.
TM01 9694 2600TM01 9695 2600
Note
The MQ can be powered by a generator
or an inverter. However, the pump will
only operate satisfactorily if the
generator or inverter generates a true
sinusoidal wave with the necessary
power and voltage input. The generator
must be sized 10 % above the P1
(input power) of the pump. For P1,
see section 13.1 Dimensions.

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English (US)
9.2 Wiring diagram
9.2.1 115 V
Fig. 14 Wiring diagram - 115 V
9.3 Winding resistance measurement
The measurement can be done with or without cables connected to the PCB and the capacitor.
TM02 2424 4708
Black (phase)
Red
Black
Orange > Flow sensor
> Pressure switch
Capacitor
Yellow
Yellow
Electric motor
Yellow/green (ground)
Red (main)
Black
White (neutral) > Cable
BA
Yellow
White C
Motor
[V/Hz] Measuring point Winding Resistance [Ω ± 10 %]
Ambient temperature
[°F] [°C]
115/60 A-B (black - red) Main 1.4 70 21
A-C (black - white) Aux 5.5

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English (US)
9.3.1 230 V
Fig. 15 Wiring diagram - 230 V
9.4 Winding resistance measurement
The measurement can be done with or without cables connected to the PCB and the capacitor.
TM02 2424 2409
Black (phase)
Red
Black
Orange > Flow sensor
> Pressure switch
Capacitor
Yellow
Yellow
Electric motor
Yellow/green (ground)
Blue
White (neutral) > Cable
BA
Yellow
White
Red (main)
Motor
[V/Hz] Measuring point Winding Resistance [Ω± 10 %]
Ambient temperature
[°F] [°C]
230/60 A-B (blue - red) Main 5.4 70 21
A-C (blue - white) Aux 5.4

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English (US)
9.5 Startup
Before start-up, the pump must be filled with 1.2 to
1.5 gallons of water to enable it to self-prime,
see fig. 16. The pump is self-priming with a
maximum suction lift of 25 ft.
Fig. 16 Priming the pump
When started, the pump begins to self-prime.
When it has been primed, the pump will
automatically change over to normal operation.
If the priming has not been completed within
5 minutes, the pump will stop automatically and
attempt to restart after 30 minutes. It is possible to
reset the pump manually, see point 2 in the table of
section 10.1 Control panel.
TM01 9696 2600
Warning
Running the pump at a higher inlet
pressure than recommended (44 psi)
can cause the pump to leak.
Grundfos cannot be held responsible
for any damage to the pump and/or its
surroundings if this warning is not
followed.

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English (US)
10. Functions
10.1 Control panel
The MQ pump is operated entirely by means of the
control panel. See fig. 1. The control panel offers the
possibility of starting/stopping the pump. The pump
settings and operating condition are indicated by
indicator lights. See fig. 17.
Fig. 17 Control panel
The functions of the control panel are described in the table below:
TM01 9684 2600
Illustration Description
1
Indicator light (red):
When the indicator light is on, the pump is on standby.
2
On/off button:
The pump is started/stopped by means of the on/off button.
The on/off button can also be used for manual resetting in case
of an alarm condition:
• press once for resetting and
• press once more for starting.
3
Indicator light (green):
Indicates that the pump is ready for operation.
When the indicator light is on, the pump will start automatically
when water is consumed. After-run time depends on the
flexibility of the discharge pipe, but will be at least 10 seconds.
4
Pump on (green):
The indicator light is on when the pump is running.

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English (US)
10.2 Pump stop
The pump incorporates an electronic protective
function that will stop the pump in case of
• dry running
• overtemperature
• overloaded motor
• seized-up motor/pump.
The pump will restart automatically after 30 minutes
(for 24 hours) in case of any type of fault if the auto-
reset function is activated (the green indicator light
on the control panel is on, see point 5 in the table of
section 10.1 Control panel).
5
Auto-reset (green):
As standard, this function is activated on delivery (does not
apply to pump versions for Australia).
When the indicator light is
• on, the Auto-reset function is activated. The pump will
automatically attempt to restart every 30 minutes after an
alarm/fault over a period of 24 hours. After this period, the
pump will remain in the alarm condition.
• off, the Auto-reset function is deactivated. The pump will not
restart after an alarm/fault.
The Auto-reset function can be activated/deactivated by
pressing the on/off button for 5 seconds.
Note: When water is consumed, the pump will start and stop
automatically, whether the Auto-reset light is on or off.
6
Alarm (red):
The indicator light is on when the pump is in alarm condition.
The alarm condition may have been caused by:
• dry running
• overtemperature
• overloaded motor
• seized-up motor/pump.
See section 10.2 Pump stop.
Illustration Description
Note
The pump settings are stored.
After supply failure, the pump will
automatically revert to its previous
operating condition when the
electricity supply is reconnected.

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English (US)
11. Maintenance
Under normal operating conditions, the pump is
maintenance-free. However, it is recommended to
keep the pump clean.
If there is any risk of frost damage, drain the pump
through the drain hole and slacken the union nut on
the discharge pipe, see fig. 18. The pump must be
filled with liquid before it is started up again.
See fig. 16.
Fig. 18 Draining the pump
11.1 Service kits
Service kits are available for the MQ pump.
The service kits consist of the following replaceable
parts:
• shaft seal
• motor
• electronic units
• hydraulic components.
11.2 Shaft seal run-in
The seal faces are lubricated by the pumped liquid,
meaning that there may be a certain amount of
leakage from the shaft seal.
When the pump is started up for the first time, or
when a new shaft seal is installed, a certain run-in
period is required before the leakage is reduced to
an acceptable level. The time required for this
depends on the operating conditions, i.e. every time
the operating conditions change, a new run-in period
will be started.
Under normal conditions, the leaking liquid will
evaporate, which means that no leakage will be
detected.
11.3 Start-up after a long period of
inactivity
The end cover incorporates a plug which can be
removed by means of a suitable tool. See fig. 19.
It is then possible to free the pump rotor if it has
seized up as a result of inactivity. If it has been
drained, the pump must be filled with liquid before
start-up. See fig. 16.
Fig. 19 Removing the end-cover plug
12. Service
If Grundfos is requested to service the pump,
Grundfos must be contacted with details about the
pumped liquid, etc. before the pump is returned for
service. Otherwise Grundfos can refuse to accept
the pump for service.
Possible costs of returning the pump are paid by the
customer.
However, any application for service (no matter to
whom it may be made) must include details about
the pumped liquid if the pump has been used for
liquids which are injurious to health or toxic.
Warning
Do not remove the pressure tank from
the pump unless it has been vented
through the air escape valve.
Never touch the electronics unless the
pump has been switched off for at least
5 minutes.
TM01 9697 4403
TM04 3633 4608
Note
If a pump has been used for a liquid
that is injurious to health or toxic, the
pump will be classified as
contaminated.

18
English (US)
13. Technical data
13.1 Dimensions
13.2 Electrical data
13.3 Approvals
CSA-approved for USA and Canada
Class 6861 08 - Mechanical devices - NSF/ANSI 61
Section 8 - Certified to NSF/ANSI 61
Class 6853 01 - Low lead content certification
program - Plumbing products
Class 3385 01 - Liquid pumps
Class 3851 81 - Liquid pumps - Certified to US
standards
14. Accessories
TM01 9799 5008
MQ 3-35 MQ 3-45
Enclosure type 3
Enclosure class IP54
Insulation class B
Supply cable 6.56 ft SJTW 18 awg with/without plug
Voltage, power consumption,
P1[W] 1 x 115-120 V - 10/+ 6 %, 60 Hz 900 W / 8.0 A 1100 W / 10.0 A
1 x 220-240 V - 10/+ 6 %, 60 Hz 850 W / 4.0 A 1050 W / 4.8 A
Model Designation Product number
MQ 3-35 / MQ 3-45 Protective cover 96693071

19
English (US)
15. Fault finding chart
If the pump does not start when the fault has been corrected, contact your pump supplier or Grundfos for
further information.
Fault Cause Remedy
1. The pump does
not start. a) Insufficient water. Check the water supply/suction pipe.
b) Overheating due to excessive liquid
temperature (above +95 °F / +35 °C). Supply cold liquid to the pump.
c) Overheating due to seized-up/
choked-up pump. Contact your pump supplier.
d) Too low or too high supply voltage. Check the supply voltage and correct the
fault, if possible.
e) No electricity supply. Connect the electricity supply.
f) No water consumption. Open a tap. Check that the height
between the top point of the discharge
pipe and the pump does not exceed 50 ft.
g) Shaft is blocked. Rotate the shaft as described in
11.3 Start-up after a long period of
inactivity.
h) Pump is in alarm condition. Reset the pump by means of the on/off
button. See point 2 in the table of
section 10.1 Control panel.
2. The pump does
not stop. a) Existing pipework is leaking or defective. Repair the pipework.
b) Non-return valve is blocked or
missing. Clean the valve or fit a new non-return valve.
3. The pump cuts
out during
operation.
a) Dry running. Check the water supply/suction pipe.
b) Overheating due to excessive liquid
temperature (above +95 °F / +35 °C). Supply cold liquid to the pump.
c) Overheating caused by:
– high ambient temperature
(> 113 °F / 45 °C)
– overloaded motor
– seized-up motor/pump.
Contact your pump supplier.
d) Too low supply voltage. Check the supply voltage and correct the
fault, if possible.
4. The pump starts
and stops too
frequently.
a) Leakage in suction pipe or air in
water. Check the water and the supply/suction pipe.
b) Too low or too high pressure in
pressure tank. Check the pressure in the pressure tank. See section 7. Operating conditions.
5. The pump gives
electric shocks. a) Defective ground connection. Connect the ground connection to the pump in accordance with local
regulations.
6. The pump starts
when no water is
consumed.
a) Internal non-return valve is
defective, or the existing pipework
is leaking or defective. Clean the valve or fit a new one.

20
English (US)
16. MQ frequently asked questions
1. What causes the MQ to start?
Answer: The MQ is equipped with both an
internal flow switch and pressure switch. Each of
these can turn the MQ on, depending on water
consumption. The pump will start when:
The flow rate is greater than 0.3 gpm
OR
the pressure is below 29 psi.
2. What causes the MQ to stop?
Answer: Other than the manual on/off button,
only the flow switch is authorized to automatically
stop the MQ during normal operation when flow
drops below 0.3 gpm. The pump will shut off in
12-15 seconds after flow stops.
Additionally, the MQ will be turned off in the event
of a dry-run or overtemperature alarm.
3. What is the maximum height of a tap above
the MQ?
Answer: If a tap or faucet is installed at heights
greater than 50 ft above the MQ, there is the
potential risk that the MQ will never start.
In cases where the MQ starts due to low pressure
(low flow rates), the pressure has to fall below
the pressure switch activation point (28-30 psi
factory setting). To allow for the pressure of 50 ft
of water, tolerances and a safety margin, we
recommend a maximum height of 50 ft between
the MQ and any tap.
4. What is the purpose of the built-in pressure
tank?
Answer: The built-in pressure tank comes from
the factory, pressurized at approximately 23 psi
(with the pump pressure at zero) and holds a
volume of 14 ounces of water. It is designed to
minimize motor startup due to small leaks.
5. How is the dry-run condition determined?
Answer: The dry-run alarm is declared when the
motor is running AND the flow rate is less than
1.6 gpm AND when pressure is less than the
pressure switch setting. When this condition lasts
for 12 seconds, the alarm will be declared after
1 minute, and the motor is stopped. The MQ
attempts to automatically restart every
30 minutes for a maximum of 24 hours. If more
than 24 hours pass without water, the pump must
be restarted manually.
6. What is the maximum inlet pressure allowed
in the MQ?
Answer: For both MQ 3-35 and MQ 3-45, the
maximum internal pressure allowed is 109 psi.
The maximum inlet pressure when added to the
MQ pressure must not exceed 109 psi.
Remember that inlet pressure adds to the MQ
pressure, so with a 40 psi inlet pressure supplied
to the MQ 3-45, internal pressures can reach
approximately 105 psi (65 + 40 psi).
Additionally, if inlet pressures exceed the built-in
pressure switch activation point (28-30 psi
factory setting), the pressure switch will be
unable to activate, and the ability to turn the MQ
on at low flow rates will be lost. In this situation,
only the flow switch will be able to turn the MQ on
at flow rates above its activation point of 0.3 gpm.
7. What is the priming capacity of the MQ?
Answer: Approx. 1.2 gallons.
8. How is overload temperature/overtemperature
of the MQ detected?
Answer: The motor has a thermal switch
incorporated in the motor windings.
The switch will cut out the motor and start again.
See the table below.
9. Where can a pressure gauge be easily
installed to measure the discharge pressure?
Answer: In the discharge piping or in 3/8" GAS
straight thread opening used to add priming
water to the pump.
17. Disposal
This product or parts of it must be disposed of in an
environmentally sound way:
1. Use the public or private waste collection service.
2. If this is not possible, contact the nearest
Grundfos company or service workshop.
Subject to alterations.
Thermal protection
[V][°F][°C]
Cut-out 115 302 150
230 275 135
Cut-in Both 151 65-67