VOSS 246 NX User manual

Assembly instructions
VOSS quick connect system 246
NX
Convenient connection, positioning
an release

Assembly instructions VOSS quick connect system 246
NX
, page 2 of 18
A. Important notices
Please observe
before using the quick connect system
VOSS quick connect system 246
NX
is suitable for the following flui s:
iesel, bio iesel, coolant, an A Blue
®
/DEF. Different applications may require
ifferent O-ring materials.
Temperature range from -40 °C to +120 °C, temporary +140 °C
Maximum operating pressure 10 bar, epen ing on applie tube materials an
imensions
When using the quick connect system in other applications, suggestions available
upon request.
Please observe
uring the assembly of the quick connect system
The assembly of the quick connect system must be con ucte by professional
mechanics subject to these assembly instructions.
Incorrectly assemble connections can result in flui leakage an failure of the system.
VOSS quick connect system 246
NX
may only be use with ports an tubes ma e of
materials escribe in chapter B (components an materials).
Do not connect nylon tube an fir-tree with hose clips or clamping sleeves.
The O-ring must be grease .
Do not remove the connecting cap until rea y for assembly.
General information
VOSS quick connect system 246
NX
permits rapi an safe connections of nylon tubes
to system components an between lines.
VOSS quick connect system 246
NX
features a particularly space-saving construction,
making it useful in tight installation spaces.
The retaining element can be rotate . It can be aligne in 8 steps an thus be a apte
to the specific installation space situation for a comfortable isassembly.
Different fir-tree an respective tube imensions can be istinguishe by color markings
on the retaining element.
VOSS quick connect system 246
NX
is also available as an electrically heate variant.
Please ask for a special assembly instruction if nee e .
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Assembly instructions VOSS quick connect system 246
NX
, page 3 of 18
B. Components an materials
1. Plug
Straight an elbow plugs are available in two ifferent nominal sizes (NS): NS 8 an NS 12.
Fir-tree sizes ( esignate as “nominal wi th”, NW) iffer in respect to the inner iameter of
the tube. Different nominal wi ths can be istinguishe by color markings on the retaining
element. The plug is ma e of polyami e an will be supplie with a protective cap. The
system is available with ifferent O-ring materials epen ing on the flui .
Fig. 2: Components of the plug, without protective cap
O-ring materials
Application O-ring material
Diesel fuel acc. to DIN EN 590 NBR, FPM
Bio iesel acc. to DIN EN 14214 FPM
Coolant EPDM
A Blue
®
/DEF EPDM
Tab. 1: O-ring materials
Fir-tree profile
Sealing O-ring
Retaining element
Fig. 1: Elbow plug NS 8,
NW 6 with protective cap
Plug NW 12 (as shown)
Male en
Plug NS 12 (as shown)

Assembly instructions VOSS quick connect system 246
NX
, page 4 of 18
2. Connecting port
Plugs can be connecte irectly to system components if they are equippe with the special
connecting port for VOSS quick connect system 246. For other types of connections VOSS offers
a wi e range of a apters, inline connectors an manifol s. The connecting port is ma e of nylon
or metal.
If necessary, VOSS will provi e etaile specifications of the connecting port. The connecting
port for quick connect system 246
NX
an ports for previous 246 system variants (e.g. 246
Stan ar , 246
AX
) are i entical.
Fig. 3: System component with nylon ports Fig. 4: System component with aluminum ports
Fig. 5: A apters Fig. 6: Inline connectors Fig. 7: T-manifol

Assembly instructions VOSS quick connect system 246
NX
, page 5 of 18
The optimize low version of the connecting port can be use only for the system variants
246 Stan ar an 246
NX
.
Fig. 8: A apter NS 8 with low (left) an higher (right) connecting port
3. Lines
Depen ing on the application, nylon tubes may be applie to the fir-tree of quick connect
system 246
NX
.
Diesel an bio iesel:
Polyami e tubes accor ing to DIN 73 378 an DIN 74324
Materials:
PA 11 – PHL
PA 12 – PHL
PA 11 – PHLY
PA 12 – PHLY
Other materials on request.
Monolayer an multilayer coolant tubes
Polyami e tubes for A Blue
®
/DEF
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Assembly instructions VOSS quick connect system 246
NX
, page 6 of 18
4. Assembly instructions
Use of arrow symbols in pictures:
In icates special points of interest escribe in the text.
In icates require manual actions an their irection.
In icates operations that shoul be avoi e .
4.1. Assembly of the nylon tube
4.1.1. Cutting the nylon tube to length
The nylon tube must be cut at a right angle.
The nylon tube must not be cut using a saw, as this causes burring. Burring re uces the
sealing ability of the connection.
When cutting the nylon tubes to length, we recommen the use of the VOSS cutting pliers (see
fig. 9). Using the VOSS cutting pliers will ensure the tube is cut cleanly an at a right angle.
Subsequent treatment of the cut surface, such as eburring, is then no longer necessary.
Fig. 9: VOSS cutting pliers for nylon tubes
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Assembly instructions VOSS quick connect system 246
NX
, page 7 of 18
4.1.2. Insertion of the fir-tree into the nylon tube
When pressing the fir-tree into the nylon tube:
The insertion proce ure must be performe at room temperature.
The nylon tube must not be heate .
The nylon tube must be un amage .
The fir-tree profile must be clean an free of any grease.
The fir-tree profile must be un amage ; otherwise the connection to the nylon tube will
not be tight.
Insertion with the manual assembly tool
The manual assembly tool (fig. 10) is available from VOSS.
Fig. 10: VOSS manual assembly tool
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Tube clamping jaws Tool insert Tool mount
Transport bar
Vice-grip
A justing screw Insert lever

Assembly instructions VOSS quick connect system 246
NX
, page 8 of 18
Step
1
Attach the correct tool mount into the inten e plug
(straight or elbow).
Fig. 11
Step
2
Place the inten e plug with protective cap into the tool
mount.
Fig. 12
Step
3
Clamp the jaws aroun the iameter of the tube.
Fig. 13

Assembly instructions VOSS quick connect system 246
NX
, page 9 of 18
Step
4
Insert the nylon tube into the clamping jaws. The overlap
of the tube must be at least 2 mm longer than the length
of the plug’s fir-tree.
Fig. 14
Step
5
The vice-grip secures the nylon tube. The clamping force can
be regulate with the a justing screw.
Fig. 15
Step
6
Move the transport bar, centering the fir-tree into the inner
iameter of the nylon tube.
Fig. 16
a L

a+2mm

Assembly instructions VOSS quick connect system 246
NX
, page 10 of 18
Step
7
The fir-tree has to be inserte completely into the nylon tube
with the insert lever, until the stop limit is reache . There
shoul be no gap > 0.5 mm.
Fig. 17
Step
8
Move the insert lever back.
Fig. 18
Step
9
Move the transport bar back. The plug is then release .
Fig. 19