KNF N 87 TTE Manuale utente

KNF 121538-121541 07/16

Translation of original Operating and Installation Instructions, english

Operating and Installation Instructions

Diaphragm Vacuum Pump

and Compressor

Type range:

N 87 TTE

Fig. 1: N 87 TTE

You have selected a high-quality KNF product; the following tips will help you operate it safely, and relia-

bly over a long period of time. Carefully study the Operating and Installation Instructions before using the

pumps and observe at all times the relevant instructions to avoid dangerous situations. The manual was

produced for the serial pumps stated above. With customer-specified projects (pump types starting with

“PJ“ or “PM“) there could be differences in detail. For customer-specified projects please therefore take

into account any agreed technical specifications, as well as these instructions.

List of Contents Page

1. Description, Operating Conditions............................................ 2

2. Safety ....................................................................................... 3

3. Installation ................................................................................ 4

4. Operation.................................................................................. 5

5. Servicing................................................................................... 7

6. Cleaning ................................................................................. 10

7. Trouble Shooting.................................................................... 11

8. Spare parts............................................................................. 13

9. Accessories............................................................................ 13

10. Tables..................................................................................... 14

11. Returns................................................................................... 15

12. Health and safety clearance and decontamination form........ 16

KNF Neuberger GmbH

Alter Weg 3

D-79112 Freiburg

Germany

Phone +49/(0)7664 / 5909-0

Fax +49/(0)7664 / 5909-99

E-Mail: info@knf.de

www.knf.de

Description, Operating Conditions Vacuum Pumps N 87 TTE

2 Translation of original Operating Instructions, English, KNF 121538-121541 07/16

1. Description, Operating Conditions

KNF pumps in the N 87 range transfer, evacuate and compress

100% oil-free. In operation they are gas-tight, and maintenance-

free.

1.1. Electrical Equipment

See the type-plate for full electrical data of the motor.

The Protection class of standard versions is IP54.

The motors used are fitted as standard with a thermal switch to

protect against overloading.

1.2. Operating Conditions

Handling air, gases, and vapours at temperatures between

+ 5 °C … + 40 °C.

For maximum permissible operating pressure, ultimate vacuum,

and flow capacity see section 10.

The pumps must not be used in areas where there is a danger of

explosion. You will find suitable pumps for areas where there is a

danger of explosion in our Product Program.

Before pumping a medium, the compatibility of materials of pump

head, diaphragm and valves with the medium must be checked (for

pump materials: see section 10).

KNF pumps in the N 87 range must not be used for liquids. You will

find suitable liquid pumps in our Product Program.

If your potential application lies outside the above limits discuss it

with our technical adviser (see last page for contact telephone

number).

1.3. Ambient Conditions

When the pump is operating the following ambient conditions must

be maintained:

Ambient temperature during operation: between

+ 5 °C … + 40 °C.

The pump must not be used in areas where there is a

danger of explosion.

During operation an adequate supply of air for cooling

must be provided.

1.4. Pump materials

See section 10.

Vacuum Pumps N 87 TTE Safety

Translation of original Operating Instructions, English, KNF 121538-121541 07/16 3

2. Safety

Note that the pumps may only be used for their intended purpose

(see section 1).

The pumps must not be used in areas where there is a danger of

explosion.

For vacuum pumps, the exhaust gases must be disposed safely.

Components connected to the pump must be designed to with-

stand the pneumatic performance of the pump.

Take care that safety regulations are observed when connecting

the pump to the electricity supply.

When the operation of the pump is interrupted by the thermal

switch, the pump will re-start automatically after cooling down.

Take all care necessary to prevent this leading to a dangerous

situation.

Specific safety instructions for the media being handled must be

observed.

Use only original KNF spare parts.

For the purposes of the Machinery Directive 2006/42/EC, pumps

are “partly completed machinery,” and are therefore to be regarded

as not ready for use. Partly completed machinery may not be

commissioned until such time as it has been determined that the

machine in which the partly completed machinery is to be

assembled is in conformity with the provisions of the Machinery

Directive 2006/42/EC. The following essential requirements of

Annex I of Directive 2006/42/EC (general principles) are applied

and observed:

General Principles No. 1

No. 1.1.2. / 1.1.3. / 1.3.1. / 1.3.3. / 1.3.4. / 1.4.1. / 1.5.1. /

1.5.2. / 1.5.8. / 1.5.9. / 1.7.4. / 1.7.4.1. / 1.7.4.3.

As these partly completed machinery are OEM-models the power

supplies and the equipment for disconnecting and switching-off the

partly completed machinery respectively have to be considered

when mounting as well as over-current and overload protective

gear.

In addition a protection against mechanical parts in motion and hot

parts, if existing, has to be provided when mounting.

The pumps conform to the Directive 2011/65/EU (RoHS2).

The following harmonized standards have been used:

DIN EN 50581

DIN EN 55014-1/2

DIN EN 61000-3-2/3

DIN EN 60204-1

EC Directives / Standards

Installation Vacuum Pumps N 87 TTE

4 Translation of original Operating Instructions, English, KNF 121538-121541 07/16

3. Installation

The pumps are OEM models intended for installation in

equipment. When installing them make certain that accident

prevention regulations, and safety instructions, including

those for subsequent operation are observed. The safety

instructions in section 2 must be observed.

The dimensions of the mountings are given in Data Sheet.

Install the pump so that the fan can draw in sufficient cooling air.

Fit the pump at the highest point in the system, so that condensate

cannot collect in the head of the pump - that prolongs working life.

When making the electrical installation the safety regulations

must be observed. In particular make sure that the electricity

supply is isolated before trying to connect the pump.

Compare the supply data with the data on the motor-plate. The

voltage must not vary by more than +10% and -10% from that

shown on the type-plate.

The motor must be connected to earth (ground) wire.

In the electrical installation, arrangements (complying with EN

60335-1) must be made for disconnecting the pump motor from the

electrical supply.

The pump must be installed so that contact with live parts is im-

possible.

We recommend that a fuse is installed in the supply circuit; the

operating current is given in Data Sheet.

Remove the protection plugs from the port threads.

Connect the suction and pressure lines (thread size G 1/8). For

flow direction see marking on the pump head or data sheet.

Arrange the suction and pressure lines so that condensate cannot

run in the pump.

Mechanical

Electrical

Pneumatic

120d 07/2009

Vacuum Pumps N 87 TTE Operation

Translation of original Operating Instructions, English, KNF 121538-121541 07/16 5

4. Operation

The pumps must not be used in areas where there is a danger of

explosion.

Specific safety instructions for the media being handled must be

observed.

If combustible media are used:

Hazard of fires and explosions due to excessively high

media temperature.

Be aware that the pumps are not designed to be explo-

sion-proof.

Make sure the temperature of the medium is always suffi-

ciently below the ignition temperature of the medium, to

avoid ignition or explosion. This also applies for unusual

operational situations.

Note that the temperature of the medium increases when

the pump compresses the medium.

Hence, make sure the temperature of the medium is suffi-

ciently below the ignition temperature of the medium, even

when it is compressed to the maximum permissible operat-

ing pressure of the pump.

The maximum permissible operating pressure of the pump

is stated in the technical specifications (section 10).

If necessary, consider any external sources of energy,

such as radiation, that may add heat to the medium.

In case of doubt, consult the KNF customer service.

Before pumping a medium, the compatibility of materials of pump

head, diaphragm and valves with the medium must be checked (for

pump materials: see section 10).

The pump must not start against pressure or vacuum. When it is

switched on the pressure in the suction and pressure lines must be

atmospheric. This must be so even when the pump restarts after

the power has been cut off for a short period.

The maximum permissible operating pressure (see section 10)

must not be exceeded.

To prevent the maximum permissible operating pressure being

exceeded, restriction or control of the air or gas flow should only be

carried out in the suction line.

If restriction or control of the air or gas flow is made on the pres-

sure side ensure that the maximum permissible operating pressure

is not exceeded.

When the pump is at a standstill the inlet and exhaust must be at

normal atmospheric pressure.

When the operation of the pump is interrupted by the thermal

switch, the pump will re-start automatically after cooling down.

Operation Vacuum Pumps N 87 TTE

6 Translation of original Operating Instructions, English, KNF 121538-121541 07/16

Take all care necessary to prevent this leading to a dangerous

situation.

Pumps that may be employed as vacuum pump and compressor

must not be used to produce vacuum and pressure at the same

time.

Diaphragm and valve plates/sealings are the only parts subject to

wear. Wear is usually indicated by a drastic reduction in the pneu-

matic performance. When replacing parts proceed as described in

section 5.

Ambient conditions: see section 1.3.

Vacuum Pumps N 87 TTE Servicing

Translation of original Operating Instructions, English, KNF 121538-121541 07/16 7

5. Servicing

Before working on the pump, isolate the power supply secure-

ly, then check that the lines are not live.

Structured diaphragm and valve plates/sealings are the only parts

of the pump subject to wear. They are simple to change.

Always change structured diaphragm, valve plates/sealings at the

same time. If the structured diaphragm and the valve

plates/sealings are not changed at the same time the nominal

performance of the pump is not guaranteed after the service.

If a pump has been used for aggressive or toxic substances or

other types of substances which are hazardous, hazardous to

health, or injurious, the following points must be observed:

1. Clean the pump and its components before servicing.

2. Ensure that the service personnel is not subject to a health

hazard. Apply the safety and protection measures that are

necessary for the medium that has been handled by the pump

(example: the use of protective gloves).

3. Ensure that discarded parts and materials are safely and

correctly disposed of.

Spare part*

Quantity

Structured diaphragm

Valve plates/sealings

Tab. 1 * According to Spare parts list, section 8

Tools

Phililips screwdriver no. 2

Phililips screwdriver no. 1

Felt-tip marker

Tab. 2

Change the structured diaphragm and valve plates/sealings in the

following sequence:

a) Remove pump head

b) Change structured diaphragm

c) Change valve plates/sealings

d) Refit pump head

Proceed as follows (see figs. 2 and 3):

Parts required

Tools required

Servicing Vacuum Pumps N 87 TTE

8 Translation of original Operating Instructions, English, KNF 121538-121541 07/16

Fig. 2: Pump N 87 TTE

Specification

Pos Description

1 Intermediate plate

2 Valve plate/Sealing

3 does not exist

4 Head plate

5 Screw

6 Screw cap

7 Screw

8 Structured diaphragm

9 Diaphragm support

10 Diaphragm spacer

11 Disk spring

12 Fan

13 Fan cover

14 Housing

15 Top plate

MMark

Fig. 3: Pump head (exploded drawing)

Vacuum Pumps N 87 TTE Servicing

Translation of original Operating Instructions, English, KNF 121538-121541 07/16 9

a) Remove pump head

1. Mark the position of top plate (15), head plate (4), intermediate

plate (1) and housing (14) relative to each other by a drawing

line (M) with a felt tip marker. This helps avoid incorrect as-

sembly later.

2. Undo the 4 head screws (5) and remove top plate (15) and

head plate (4) together with intermediate plate (1) from the

pump housing.

3. Remove fan cover (13) from housing after loosening the four

screws.

b) Change structured diaphragm

1. Turn the fan (12) to bring the structured diaphragm (8) to top

dead centre.

2. Lift the edge of the structured diaphragm (8) and, gripping it on

opposite sides, unscrew it by turning anti-clockwise.

3. Take the diaphragm support (9), diaphragm spacer(s) (10),

and disk spring (11) off the threaded portion of the structured

diaphragm and retain them.

4. Check that all parts are free from dirt and clean them if neces-

sary (see section 6. Cleaning).

5. Put the diaphragm support (9), diaphragm spacer(s) (10), and

disk spring (11), in that order, on the thread of the new struc-

tured diaphragm.

The concave side of the disk spring must be towards the struc-

tured diaphragm.

6. Turn the fan (12) until the connecting rod (connecting part

between motor shaft and structured diaphragm) is at top dead

centre.

7. Screw the new structured diaphragm (8), complete with dia-

phragm support (9), diaphragm spacer(s) (10) and disk spring

(11), into the connecting rod (clockwise) and tighten it by hand.

c) Change valve plates/sealings

1. Undo the screws (7).

2. Separate the head plate (4) from intermediate plate (1).

3. Remove the valve plates/sealings (2) from the intermediate

plate (1).

4. Check that the valve seats in the head plate and intermediate

plate are clean; if scratches, distortion, or corrosion are evident

on these parts they should be replaced.

5. Lay the new valve plates/sealings (2) in the recesses in the

intermediate plate (1). The valve plates/sealings for suction

and pressure sides are identical, as are upper and lower sides

of the valve plates/sealings.

Cleaning Vacuum Pumps N 87 TTE

10 Translation of original Operating Instructions, English, KNF 121538-121541 07/16

6. Place the head plate (4) on the intermediate plate (1), in the

position indicated by the marking (M).

7. Check that the head plate (4) is centred by moving it gently

sideways.

8. Join the head plate (4) and the intermediate plate (1) by tight-

ening the two screws (7) with disk spring and washer until the

screw heads are just seated (that is to say, until the first re-

sistance is felt); than tighten each screw (7) another quarter-

turn.

d) Refit pump head

1. Place the pump head (consisting of intermediate plate (1) with

valve plates/sealings (2) and head plate (4)) on the housing

according to the marking (M).

2. Place the top plate (15) on the head plate (4) according to the

marking (M).

3. Tighten the screws (5) with disk spring gently diagonally.

4. Turn the fan (12) to check that the pump rotates freely.

5. Now tighten screws (5) diagonally, until the disk spring lies on

plainly.

6. Refix the fan cover (13).

If you have any questions about servicing call our technical adviser

(see last page for contact telephone number).

6. Cleaning

When changing valve plates/sealings and structured diaphragm,

inspect all parts for dirt before assembling the pump head, and

clean them if necessary.

If a compressed air line is available, blow the parts out with it.

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