Condensate Discharge; Electrical Connection - Vaillant ecoMAX 665 Installation And Maintenance Manual

Fig. 4.9 Example of installation with horizontal air/flue duct
Concentric systems made of plastic (diameter - 80/125 mm)
are combined with the appliance as flue pipes.
The most suitable system depends on the specific instal-
lation and application conditions (see also the installa-
tion manual 0020014606_00GB for the flue pipes).
• Mount the flue pipes consulting the installation manu-
al contained in the scope of delivery of this appliance.
4.7

Condensate discharge

4
a b
3 3
Internal Internal
stackpipe discharge system
Fig. 4.10.1
The condensate generated during combustion is led
from the condensate discharge pipe to the waste water
connection via a draining funnel.
Note!
The discharge pipe from the boiler condensate
drain must have a continuous fall (45 mm per
meter) and preferably be installed and terminated
within the building to prevent possible freezing.
The condensate discharge pipe must terminate in a suit-
able position, e.g.:
a) preferably the discharge pipe should run and termi-
nate internally to the house soil and vent stack (at
least 450 mm above the invert of the stack). A trap
giving a water seal of at least 75 mm (3) (built into
the boiler) should be incorporated into the pipe run,
and there must be an air break (4) in the discharge
pipe upstream of the trap. The connection to the
stack should not be made in a way that could cause
cross flow into any other branch pipe, or from that
branch pipe into the condensate drainpipe. This can
Installation and maintenance manual ecoMAX 665 / 0020020159_03
c d
6
7
5
Gulley Soakaway
be achieved by maintaining an offset between branch
pipes of at least 110 mm on a 100 mm diameter stack
and 250 mm on a 150 mm diameter stack.
b) connecting into the internal discharge branch (e.g. sink
waste) with an external termination, the condensate
discharge pipe should have a minimum diameter of 22
mm with no length restriction and should incorporate a
trap with a 75 mm (3) (built into the boiler) seal. The
connection should preferably be made down stream of
the sink waste trap. If the connection is only possible
upstream, then an air break is needed between the two
traps. This is normally provided by the sink waste.
c) terminating in a gully (5) below grid level (6) and
above the water level. The external pipe length
should be kept as short as possible to minimise the
risk of freezing and should not be more than 3 m.
d) at a condensate absorption point (soakaway) (7). The
external pipe length should not be more than 3 m.
1
2
Fig. 4.10.2 Condensate discharge
Refer to 'BS 6798 Specification for installation of gas–
fired boilers of rated input not exceeding 70 kW net' for
further information. Before operating the boiler the con-
densate trap (1) must be filled with water as described in
relevant section.
d Danger!
Before connecting the condensate discharge it
is absolutely important to install the syphon kit
included correctly and filling up with water.
4.8

Electrical connection

d Danger!
Risk of fatal electric shock from touching live
connections. Always switch off the power sup-
ply to the boiler first. Only once this is done
may you carry out the installation.
There is continuous operating voltage at the
power supply terminals L and N even when the
appliance on/off switch is switched off.
Attention - this appliance must be earthed!
Installation 4
15