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MANN+HUMMEL Industrial Filters 

5

NLG 

5.  Maintenance/repair

Only carry out cleaning, maintenance 

and repair work when the assembly is 

switched off (motor, compressor, fan, 

or similar). Never operate when the fil

-

ter element has been removed.

5.1  Maintenance schedule

Component

Task

Maintenance time

Main element

Replace 

(if the main element cannot be 

replaced, it can be cleaned if nec-

essary, as described in Section 

5.2.2)

As per the operating instructions for 

the respective devices or motors, 

after the maintenance indica-

tor/switch has triggered or after 2 

years at the latest

Secondary element 

(optional)

Replace

After maintenance has been per-

formed on the main element 5 

times or after 2 years at the latest

Dust discharge valve (if available)

Check for damage/function and 

clean

Depending on the dust concentra-

tion in the environment (e.g. daily if 

large amounts of dust)

Plastic housing

Check for damage and cracks

When performing maintenance on 

the filter

Maintenance display/switch (on 

clean air tube)

Check function 

1)

Annually

1)

 In order to attain the maximum permitted vacuum in the air intake system, reduce the size of the intake opening 

slowly while the motor is running by covering it (e.g. with a piece of card or a metal plate) until the maintenance 

indicator/switch triggers.

After the maintenance indicator has triggered, do 

not

 continue to reduce the size of the intake opening as this will 

cause damage.

After the test, reset the maintenance indicator by pressing the reset button.

Содержание NLG Series

Страница 1: ...19 611 28 017 Version 0806 NLG series Operating Instructions ...

Страница 2: ...personnel to familiarize them selves with the NLG series and to use it in the various application areas for which it was designed The operating instructions contain important information on operating the components safely correctly and economically These instructions must be followed in order to avoid danger reduce repair costs and down times and increase the reliability and working life of your m...

Страница 3: ... aggressive combustible and or explosive materials is considered incorrect use In this case the manufacturer supplier will reject all liability in event of resultant dam age Intended use also includes observing operat ing instructions and complying with inspection and maintenance requirements It is imperative for the operator to check the filter regularly for externally visible signs of damage or ...

Страница 4: ...filters Pico as a water extractor Wire clamp latches connect the lower hous ing section with the middle housing section The housing cover is screwed to the middle section Do not untighten these screws As an option seals can be installed on the non filtered air side as hose proof protection However only limited water passage is possible The intake neck can also be fitted with a rain cap as an optio...

Страница 5: ...ed on the main element 5 times or after 2 years at the latest Dust discharge valve if available Check for damage function and clean Depending on the dust concentra tion in the environment e g daily if large amounts of dust Plastic housing Check for damage and cracks When performing maintenance on the filter Maintenance display switch on clean air tube Check function 1 Annually 1 In order to attain...

Страница 6: ...2 2 Cleaning the main element Never wash brush or knock the main element Only blow it out in cases of emergency However no dust may touch the inner side of the main ele ment In cases of emergency the main ele ment can be cleaned as described below Because minimal damage is often very difficult to detect or cannot be detected at all we always recom mend using new elements to protect the motor or eq...

Страница 7: ...r casing Carefully insert the main element into the housing open end first Position lower housing section observe position of the dust discharge valve see also Section 4 Position the wire clamp latches in the groove on the flange on the middle housing section and tighten same as Fig 1 but in reverse 5 3 Servicing the secondary element The secondary element must be replaced every 5th maintenance se...

Страница 8: ... at least one replace ment element in stock for each filter element required 7 Disposal of components Figure 6 Draining the valve Component Material Disposal Main element Filter paper Polyurethane foam PP T20 Dispose of as per local regulations Secondary element Filter paper fleece depending on model Polyurethane foam glue PA 6 GF 30 Dispose of as per local regulations Housing cover PP GF30 Plasti...

Страница 9: ...l lines and connections Dust on clean air end in and downstream of filter Main element defective Remove dust carefully inspect main element and if necessary replace together with secondary element see section 5 Incorrect maintenance Remove dust carefully perform main tenance as per section 5 Housing not closed correctly Remove dust carefully check main element housing and connections for damage re...

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