GRUNDFOS MQ Series MQ3-45 Pressure Booster Pump Instruction Manual

GRUNDFOS MQ Series MQ3-45 Pressure Booster Pump Instruction Manual

Before beginning installation procedures, these installation and operating instructions should be studied carefully. The installation and operation should also be in accordance with local regulations and accepted codes of good practice.

General description

The MQ is a compact water supply system consisting of a pump, motor, pressure tank and controller combined in an integral unit.
The pump starts automatically when water is consumed in the installation and stops when the consumption ceases. The MQ is a low-noise pump which can be installed both indoors and outdoors.
The pump is self-priming and has a non-return valve incorporated in the suction port, see fig. 1. The pump features a user-friendly control panel.
The pressure tank incorporated in the pump reduces the number of starts and stops in case of leakage in the installation.
The MQ pump has built-in over temperature and dry running protection.

Applications

Typical applications:

• Water pressure boosting in storage tanks (maximum inlet pressure 3 bar) and
• water supply from wells (maximum suction lift 8 metres), e.g.
  • in private homes,
  • in summer houses and weekend cottages,
  • on farms,
  • in market gardens and other large gardens.

The pump can be used for rain water and has been approved for drinking water.
The maximum suction lift of the pump can be determined from the diagram on page 120.

Example:
If the suction lift is 2.5 metres, the length of the suction pipe must not exceed 24 metres.

Type key

MQ pump

Pumped liquids

Thin, clean, non-aggressive liquids, not containing solid particles or fibres.

Technical data

Operating conditions

| MQ 3-25| MQ 3-35| MQ 3-45
---|---|---|---
Maximum pressure [bar]| 2.5| 3.5| 4.5
Maximum system pressure [bar]| 7.5
Maximum suction lift [m], see page 120| 8
Minimum ambient temperature [°C]| 0
Maximum ambient temperature [°C]| 45
Minimum liquid temperature [°C]| 0
Maximum liquid temperature [°C]| 35
Net weight [kg]| 13.0
Sound pressure level [dB(A)]| < 70
Tank volume [l]| 0.16
Air pressure in tank [bar]| 1.0| 1.5 to 1.7
50 Hz:
Maximum flow rate [m³/h]| 4.5
| G 1
60 Hz:
Maximum flow rate [m³/h]| 5
Connections| 1″ NPT

Electrical data

| MQ 3-25| MQ 3-35| MQ 3-45
---|---|---|---
Enclosure class| IP 54
Insulation class| B
Supply cable| 2 m H07RN-F with/without plug
50 Hz:
Voltage [VAC]| 1 x 220-240 V –10/+6%
Power consumption, P1 [W]| 600| 850| 1000
60 Hz:
Voltage,| 1 x 110-120 V –10/+6%| –| 800| 1000
power consumption, P1 [W]| 1 x 220-240 V –10/+6%| 550| 850| 1050

Dimensions

See dimensions at the end of these instructions.

Approvals

Materials in contact with the pumped liquid have been approved by the British Water Regulations Advisory Scheme (WRAS) according to BS 6920 for use in drinking water.
Other approvals: See pump nameplate.

Functions

Control panel

The MQ pump is operated entirely by means of the control panel, see fig. 2. The control panel offers the possibility of starting/stopping the pump. The pump settings and operating condition are indicated by indicator lights.

The functions of the control panel are described in the following table:

| 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. The pump will stop a few seconds after the water consumption has ceased.
4| | Pump on (green): The indicator light is on when the pump is running.
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,
• over temperature,
• 7overloaded motor,
• seized-up motor/pump or
• frequent starts/stops (the indicator light flashes). See section 4.2 Pump stop

Note: The pump settings are stored. After supply failure, the pump will automatically revert to its operating condition when the electricity supply is connected again.

Pump stop

4.2 Pump stop
The pump incorporates an electronic protective function which will stop the pump in case of

• dry running,
• over temperature,
• overloaded motor,
• seized-up motor/pump,
• frequent starts/stops (the “Alarm” indicator light flashes) caused by
  • leakage in suction pipe,
  • dripping tap or
  • running toilet.

The pump will restart automatically after 30 minutes (for 24 hours) in case of any type of fault if the Autoreset function is activated (the green indicator light on the control panel is on, see point 5 in the table in section 4.1 Control panel).

Mounting and connection

Mounting the pump

The pump is resistant to sunlight and can be installed both indoors and outdoors. When installed outdoors, it is recommended to protect the pump by means of a suitable cover.
Always mount the pump on the base plate with horizontal suction port and vertical discharge port.
The pump must be mounted horizontally.
Maximum permissible inclination angle: ±18°, see fig. 3.

The pump must be secured to a solid foundation by bolts through the holes in the base plate, see fig. 4.

The pump discharge is flexible, ±5°, to facilitate the connection. Never apply unnecessary force when connecting the pipes.
The pump is supplied with G 1 (50 Hz) or 1″ NPT (60 Hz) screwed connections to be fitted in the suction and discharge ports, see fig. 5.

The pump incorporates a non-return valve which prevents backflow during priming and operation.
Installations with long suction pipes: A non-return valve is supplied with the pump. It is recommended to fit this non-return valve in the pump suction port.
If the pump is installed in long pipes, the pipes must be adequately supported on either side of the pump in order not to strain the pump connections. If the pump draws water from a well, it is recommended also to fit a foot valve to the end of the suction pipe, see fig. 6.

If a hose is used for suction pipe, it must be of a non collapsible type.
As the pump is self-cooling, no space is required around the pump and no ventilation is required.

Electrical connection

The electrical connections and additional protection should be carried out by qualified persons in accordance with local regulations.

Never make any connections in the pump terminal box unless the electricity supply has been switched off for at least 5 minutes.
The pump must be earthed (PE).
Do not start the pump until it has been filled with water (primed).

The pump must be connected to the mains via a rubber-sheathed cable with a protective earth lead. It is possible to replace the mains supply cable, see fig. 7.

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. 8.

Does not apply to pump versions for Australia.

Generator or inverter

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.

Start-up

Before start-up, the pump must be filled with 4.5 to 5 litres of water to enable it to self-prime, see fig. 9.
The pump is self-priming with a maximum suction lift of 8 metres.

When the pump is started, it will start to self-prime.
When the pump has been primed, it 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 in section 4.1 Control panel.

Maintenance

Under normal operating conditions, the pump is maintenance-free. However, it is recommended to keep the pump clean.

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.

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. 10. The pump must be filled with liquid before it is started up again, see fig. 9.

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.

Start-up after a long time of inactivity

The end cover incorporates a plug which can be removed by means of a suitable tool. It is then possible to free the pump rotor if it has seized up as a result of inactivity. If the pump has been drained, it must be filled with liquid before start-up, see fig. 9.

Service

Note: If a pump has been used for a liquid which is injurious to health or toxic, the pump will be classified as contaminated.
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.

Disposal

Disposal of this product must be carried out according to the following guidelines:

1. Use the local public or private waste collection service.
2. In case such waste collection service does not exist or cannot handle the materials used in the product, please deliver the product or any hazardous materials from it to your nearest Grundfos company or service workshop

Fault finding chart

supply/suction pipe.
b) Overheating due to excessive liquid temperature (above +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 15 metres.
g) The pump is in alarm condition.| Reset the pump by means of the on/off button. See point 2 in the table in section 4.1 Control panel.
2. The pump does not stop.| a) The existing pipework is leaking or defective.| Repair the pipework.
b) The 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 +35°C).| Supply cold liquid to the pump.
c) Overheating caused by:

• high ambient temperature (> 45°C),
• overloaded motor or
• 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 cuts out during operation. The “Alarm” indicator light flashes.| a) Frequent starts/stops caused by

• leakage in suction pipe,
• dripping tap or
• running toilet.

| Check the water supply/suction pipe.
5. The pump starts and stops too frequently.| a) Leakage in suction pipe or air in the water.| Check the water supply/suction pipe.
b) Too low or too high pressure in pressure tank.| Check pressure in pressure tank, see section 3.1 Operating conditions.
6. The pump gives electric shocks.| a) Defective earth connection.| Connect the earth connection to the pump in accordance with local regulations.
7. The pump starts when no water is consumed.| a) Defective non-return valve or the existing pipework is leaking or defective.| Clean the valve or fit a new non-return valve.

If the pump does not start when the fault has been corrected, contact your pump supplier or Grundfos for further information.

Dimensions

Suction lift/suction pipe

Exploded view

Declaration of Conformity

We GRUNDFOS declare under our sole responsibility that the products MQ, to which this declaration relates, are in conformity with the Council Directives on the approximation of the laws of the EC Member States relating to

• Machinery (98/37/EC).
  Standard used: EN 292.

• Electromagnetic compatibility (89/336/EEC).
  Standards used: EN 61 000-6-2 and EN 61 000-6-3.

• Electrical equipment designed for use within certain voltage limits (73/23/EEC) [95].
  Standards used: EN 60 335-1 and EN 60 335-2-41.

Contact Us

Denmark
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Telefax: +61-8-8346-7434

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References

• Storm clips for professional storm safety - FOS

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