GRUNDFOS JP 6 B-A-CVBP Jet Pump Instruction Manual

GRUNDFOS JP 6 B-A-CVBP Jet Pump

Symbols used in this document

General information

These instructions apply to JP 5 and JP 6 pumps in material variants A and B.

Applications

The Grundfos jet pumps, type JP, are horizontal, self-priming centrifugal pumps designed for pumping water and other thin, non-aggressive and non- explosive liquids, not containing solid particles or fibres.
If the pump has been used for dirty liquids, e.g. pool water, flush it through with clean water immediately after use.
Warning
Do not use the pump for flammable liquids, such as diesel oil and petrol.
Warning
Do not use the pump for aggressive liquids, such as acids and seawater.

Identification

1. Type
2. Model
3. Supply voltage
4. Maximum current
5. Frequency
6. Maximum pressure
7. Maximum head
8. Country of origin
9. Rated head
10. Enclosure class
11. Input power
12. Rated flow rate
13. Maximum ambient temperature
14. Maximum liquid temperature
15. Efficiency class
16. Production company

Installation

The pump must be installed horizontally.
When the suction pipe is longer than 10 metres or the suction lift is greater than 4 metres, the diameter of the suction pipe must be larger than 1″. If there is a suction lift, we recommend that you fit a non-return valve to the suction pipe.
If a hose is used as a suction pipe, it must be non-collapsible.
To prevent solids from entering the pump, a filter can be fitted to the suction pipe.
Make sure that the pump is not stressed by the pipework.
Connect the discharge pipe to the pump discharge port (T). See fig. 2. H = maximum 7 metres.Installation dimensions can be found on page 206.

Handle-

It is not necessary to fit the handle supplied on permanently installed pumps.
On portable pumps, the handle can be fitted lengthwise or crosswise depending on the material variant.

Ejector valve

The ejector valve is supplied separately with the pump.
Remove the plug (V), see fig. 5, and fit the ejector valve into the hole.
Note
The O-ring must be fitted to the ejector valve.
Tighten the valve using fingers only.

Ejector valve setting

The ejector valve in the plug hole (V) can be turned to two positions. See fig. 4.
Figure 3 shows an example of how the ejector valve position may affect the QH curve.

1. Pos. 1
   Turn the valve to the left (out).
   Select pos. 1 when the suction pipe is empty and the pump is to be primed.
   Select also pos. 1 when a small quantity of water and a high pressure are required.

2. Pos. 2
   Turn the valve to the right (in).
   Select pos. 2 when the pump has been primed, and a large quantity of water and a low pressure are required.

Warning
This position must only be used for high flow rates and constant water consumption.

Electrical connection

Carry out the electrical connector according to local regulations.
Warning
During electrical installation, make sure that the power supply cannot be accidentally switched on.
Warning
The pump must be connected to an external mains switch with a minimum contact gap of 3 mm in all poles.
As a precaution, the pump must be connected to a socket with earth connection.
We recommend that you fit the permanent installation with an earth leakage circuit breaker (ELCB) with a tripping current ≤ 30 mA.
Single-phase motors incorporate a thermal switch and require no additional motor protection.
Three-phase motors must be connected to an external mains switch and a motor- protective circuit breaker.
Carry out the electrical connection as shown in the diagram on the inside of the terminal box cover.

Checking the direction of rotation (three-phase motors)

Warning
Do not start the pump until it has been filled with liquid.
Arrows on the motor fan cover indicate the correct direction of rotation.
If the direction of rotation is wrong, switch off the power supply and interchange any two of the incoming supply wires.

Startup

Warning
Do not start the pump until it has been filled with liquid.
The pump must not run without delivering water for more than four minutes.

Filling the pump with water

1. Remove the plug (P). See fig. 5.
2. Fill the pump with water.
3. Refit the plug and tighten it using fingers only. The pump can now be started.

If there is a suction lift, up to four minutes may pass from the moment the pump is started until it delivers water. This period depends on the length and diameter of the suction pipe.
When the pump is delivering water without air, you may turn the ejector valve to position 2. See fig. 4.

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. As a result, no leakage will be detected.

Maintenance

If the pump has been used for dirty liquids, e.g. pool water, it must be flushed through with clean water immediately after use.
Cleaning the pump
It is only necessary to clean the pump if it does not work as intended and flushing it with clean water did not eliminate the problem.
Warning
Before starting work on the product, switch off the power supply. Make sure that the power supply cannot be accidentally switched on.
The position numbers mentioned in the following sections refer to fig. 6.
Dismantling

1. Pumps with ejector valve: Turn the ejector valve to pos. 1. See fig. 4.

2. Drain the pump by removing plug (pos. 25) or ejector valve (pos. 25a).
   Warning
   Make sure that the escaping hot or cold liquid does not cause injury to persons or damage to the equipment.

3. Remove screw (pos. 93) and clamp (pos. 92) holding pump sleeve (pos. 16).

4. Push pump sleeve (pos. 16) free of the motor stool with a screwdriver and take it off.

5. Pull ejector (pos. 14) out of the pump sleeve.

6.  Clean the ejector and the pump sleeve using a soft brush or a water jet.

7. Check if impeller (pos. 49) is dirty. If that is the case, clean the impeller (in place) using a soft brush or a water jet. See fig. 7.
   To prevent the impeller and shaft from rotating, hold the motor fan blades.
   Caution
   Do not use a high-pressure jet cleaner.

Assembly

1. Moisten O-ring (pos. 13) with soapy water and fit it into the recess of the suction port of ejector (pos. 14).
2. Fit the ejector into pump sleeve (pos. 16). Check that O-ring (pos. 13) is positioned correctly on the collar of the suction port of the sleeve.
3. Moisten O-ring (pos. 31) with soapy water and place it on the ejector.
4. Moisten seal ring (pos. 91) with soapy water, fit it into the recess of the ejector and turn it against the stop.
5. Fit the pump sleeve with the ejector to the motor stool. Check that O-ring (pos. 31) is positioned correctly.
6. Place clamp (pos. 92) on the pump sleeve, and fit and tighten the screw and nut.

Refit plug (pos. 25) or ejector valve (pos. 25a). Check that the ejector valve is in position 1. See fig. 4. Tighten the plug or ejector valve using fingers only.
In orders for spare parts, please mention the position number in fig. 6 and the pump data marked on the pump nameplate. Note
The pump illustrated in fig. 6 may differ from the actual pump version.

Frost protection

Caution
If the pump is not used during periods of frosts, it must be drained to avoid damage.

To drain the pump, remove the plug (P) and the plug or the ejector valve (V). See fig. 8.
Warning
Make sure that the escaping hot or cold liquid does not cause injury to persons or damage to the equipment.
Refit the plugs and tighten them using fingers only.

Technical data

• Ambient temperature
• Maximum +40 °C.
• Storage temperature
• Minimum -20 °C.
• Maximum +70 °C.
• Liquid temperature
• See pump nameplate.
• System pressure
• Maximum 6 bar.
• Inlet pressure
• At inlet pressures above 1.5 bar the discharge pressure must be at least 2.5 bar.
• Supply voltage
• 1 x 220-240 V, 50 Hz.
• 3 x 220-240/380-415 V, 50 Hz.
• Insulation class
• F.
• Enclosure class
• IP44.
• Relative air humidity
• Maximum 95 %.
• Dimensions
• See page 206.
• Sound power level
• The sound power level of the pump is lower than 72 dB(A).
• Start/stop frequency
• Maximum 100 per hour.

Fault finding

Warning
Before starting fault finding, switch off the power supply. Make sure that the power supply cannot be accidentally switched on.

• Or contact the nearest Grundfos company or service workshop.

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.

References

• Slovak (Slovakia) | The full range supplier of pumps and pump solutions. As a renowned pump manufacturer, Grundfos delivers efficient, reliable, and sustainable solutions all over the globe. Step into our world.
• Bosnian (Bosnia) | The full range supplier of pumps and pump solutions
• Grundfos | Water is and has always been at the heart and soul of Grundfos. Our promise to the world is to respect, protect, and advance the flow of water.

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