Assembly, Commissioning, And Operation; Mounting Fastening Elements W01, W04 And W05; Operate Condensate Drain; Semi-Automatic Condensate Drain - Emerson Aventics NL1 Notice D'instruction

5 Assembly, commissioning, and operation

Danger of injury if assembled under pressure or voltage!
Assembling when under pressure or electrical voltage can lead to injuries and
damage to the product or system components.
1. Make sure that the relevant system component is without pressure and
voltage before you assemble the product.
2. Protect the system against being restarted.
Sudden pressure increase during commissioning!
The system is exposed to sudden pressure on commissioning if no SSU filling
unit is used! This may result in dangerous erratic cylinder motions.
Please ensure when commissioning a system without a SSU filling unit that
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the cylinders are in their end position or that no danger can emit from
those not in end position.
System is operating under pressure!
Incorrect installation may damage the air preparation unit/apparatus and
cause serious injury.
Before commissioning, check that all connections, ports, and maintenance
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equipment have been correctly installed.

5.1 Mounting fastening elements W01, W04 and W05

Please heed figures g Fig. , g Fig. 12, g Fig. 15, g Fig. 16 and g Fig. 14.
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5.2 Operate condensate drain
g Fig. 1
g Fig. 2
g Fig. 3
Potential impairment of compressed air system by condensate!
In the case of the semi-automatic condensate drain, condensate is only dis-
charged when the reservoir is not under pressure. If in operation for an ex-
tended period, the condensate may exceed the maximum filling level and find
its way into the compressed air system. This may result in damage to the com-
pressed air system.
1. Regularly check the filling level in the reservoir.
2. Drain condensate manually once it reaches the maximum filling level.
3. Do not let the condensate run off into the surroundings.
5.2.1 Semi-automatic condensate drain
g Fig. 1
The condensate drain opens and closes depending on operating pressure:
• Pressure < 1.5 bar: drain open
• Pressure > 1.5 bar: drain closed
Set semi-automatic mode:
Open the drain screw by turning it all the way to the left.
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You may leave the screw one turn deep in the thread or remove it completely.

5.2.2 Draining condensate manually

g Fig. 3
The condensate can also be manually drained (b = maximum filling level).
1. Turn drain screw (a) all the way to the right (closed position).
2. Turn drain screw (a) to the left a few times until condensate runs out.
5.2.3 Fully automatic condensate drain
g Fig. 2
The fully automatic condensate drain is available in versions "open without pres-
sure" and "closed without pressure". In both versions the valve opens automati-
AVENTICS™ NL1 | NL2 | NL4 | NL6 | R412015556-BAL-001-AE | English
CAUTION
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cally as soon as the floater reaches the highest point and closes again when the it
reaches the lowest point.
Version "open without pressure"
The condensate drain opens and closes depending on operating pressure:
• Pressure < 1.5 bar: drain open
• Pressure > 1.5 bar: drain closed
Setting the automatic mode:
Turn the drain screw to the right as far as it will go.
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Version "closed without pressure"
The condensate drain is closed regardless of the operating pressure.
Draining condensate manually
g Fig. 3
The condensate can also be manually drained (b = maximum filling level).
Turn the drain screw (a) counterclockwise as far as it will go.
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If the drain screw is screwed in all the way anti-clockwise, the auto-
matic drainage is blocked.

6 Service and repairs

6.1 Cleaning and servicing

• Close all openings with suitable safety devices so that no cleaning agent can
enter into the system.
• Never use solvents or aggressive detergents. Only clean the product using a
slightly damp cloth. Only use water and, if necessary, a mild detergent.
• Do not use high-pressure cleaners for cleaning.
• Do not use compressed air for cleaning (blowing off) the air preparation unit
or equipment.

6.2 Exchanging the filter element

System is operating under pressure!
Opening the system while under pressure may damage the air preparation
unit/apparatus and cause serious injury.
Please ensure that the system is not under pressure before you open the
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reservoir.
The filters clog up over time and need to be replaced regularly.
• With differential pressure display NL (NL4, NL6): red marking shows when a
change is needed.
• Without differential pressure display/differential pressure gauge NL (NL4,
NL6):
in case of active carbon filters, every six months, all other filters annually.
However, this is only approximate, because intervals depend on the quality of
compressed air and flow rate.
Please use the material numbers listed below to order. The addresses of the inter-
national agencies are available at www.emerson.com/contactus.
Wearing parts
Series NL Material no.
Standard filter element, 5 µm,material: polyethylene
NL1/NL2 1829207061
NL4 1829207070
Standard filter element, 5 µm,material: polyethylene
NL6 1829207045
Standard filter element, 8 µm,material: sintered bronze
NL4 R961400010
Standard filter element, 25 µm,material: polyethylene
NL1/NL2 R961400004
Standard filter element, 40 µm,material: polyethylene
NL1/NL2 R961403385
NL6 1829207040
Standard filter element, 40 µm,material: sintered bronze
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