Vaillant VA 6-050 MXNHDI, Installation Manual

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Multi Split Type Installation Manual
18
10.5 Installation of the Coolant pipes
10.5.1 Handling the Coolant Pipes
Danger!
Danger of burns and eye injuries.
In the event of soldering, use suitable
protection equipment (protective soldering
mask, soldering gloves, solderer clothing).
Warning!
Danger of breakdowns or malfunction. Danger of
wear in the coolant pipes.
To ensure that the coolant pipes do not wear
take the following points into consideration:
- Use pipes specifically intended for cooling.
- Ensure that the pipes are clean, dry and
polished on the inside.
- The insulation of the pipes should be done
using specific insulation for cooling.
- Observe the minimum and maximum pipe
distances for each model.
- Do not bend the pipes where possible. When
bending them, keep the radius as wide as
possible to minimise load losses.
- If soldering, do so using strong welding
(copper-silver alloy). During the soldering
process a stream of dry nitrogen should be
run through the inside of the pipes in order to
avoid rusting.
- Only cut the coolant pipes using pipe cutters
and always keep the pipe ends covered.
- Any flaring work should be performed
meticulously in order to avoid subsequent
losses of gas through the pipes.
- When reviving keep the pipe opening directed
downwards in order to prevent shavings from
getting into the pipes.
- Mount the joining tubes carefully, ensuring
they cannot become displaced. Ensure that
they will not cause traction in the joins.
- Equip the coolant pipes (inflow and outflow)
separately and with high density heat
insulation.
- Carefully squeeze the flaring connector,
centring the flaring cone and the flanged nut.
Applying excessive force without correctly
centring can damage the thread and cause a
reduction in the water tightness in the join.
Note!
In specialised dealers you will find coolant pipes
which are thermally insulated as a Vaillant
accessory.
10.5.2 Laying of the Coolant Pipes
Note!
Ensure that after mounting there is enough
space for accessing the indoor unit connections.
• Carefully bend the installation pipe in the right
direction.
Warning!
Danger of breakdowns or malfunction.
Danger of wear in the coolant pipes.
Bend the pipe carefully to prevent choking or
breaks.
• Position the pipes in the runoff provided.
• Cut the pipes, leaving enough extra piping hanging
over to enable the unit to be hooked up at the indoor
unit joins.
• Insert the nut in the coolant pipe and carry out the
flaring.
• Insulate the coolant piping correctly and separately
(figure 10.2). To do so, cover any possible cuts with
masking tape or insulate any bare coolant piping with
the corresponding insulation material used for cooling.
Fig. 10.2 Pipe Insulation.
Legend
1 Coolant pipe (gas)
2 Insulation
3 Coolant pipe (liquid)
4 Winding
5 Condensed water drainpipe
10 Installation of the Cassette Indoor Unit