Daikin D2CNL-A1A - Guidelines When Connecting the Condensate Piping; Guidelines for Condensate Piping Termination

4 Installation
Installation Manual
15
D2CNL024A1AA
Wall-mounted condensing boiler
3P469346-12R – 2021.09
Symbols:
Item Description
Option
Wiring depending on model
Switch box
PCB
Earth wiring
15
Wire number 15
Legend:
Part Connector Description
PCB1 — Main PCB
P1 X1A - X11 Boiler pump
F1 X6A -X11 Fan
GV1 X12 Gas valve
IT1 X12 Ignition transformer
3WV1 X10 Central heating / domestic hot
water diverter valve motor
WPS1 X7 Water pressure sensor
DHWFS1 X2 Domestic hot water flow sensor
IE1 X12 Ionisation input
K1 X1M On/Off room thermostat
HE1 X2 Overheat thermostat
NTC1 X1M Outdoor temperature sensor
NTC2 X4 Flue temperature sensor
NTC3 X4 Return temperature sensor
NTC4 X4 Flow temperature sensor
NTC5 X7 Domestic hot water temperature
sensor
Ext2 X2M Power supply cable
Ext3 X2M External power output
(230VAC)
WARNING
External power output should ONLY be used for optional
parts supplied by manufacturer, according to the
instructions provided within the manual of optional parts.
Failure to observe this warning will void the warranty. The
manufacturer is NOT responsible for any damage that may
occur this way.
4.8.7 Guidelines when connecting the
condensate piping
DANGER
In order to prevent escape of flue gases and so poisoning,
the condensate trap must be mounted to its place before
commissioning.
Condensate trap must be connected to a drain via an open
connection.
Precautions that should be taken about condensate piping are:
▪ Horizontal pipe runs must fall a minimum of 45mm/metre.
▪ External piping should be kept as short as possible or thermally
insulated to prevent freezing, depending on the installation winter
climate condition.
▪ Make sure that the condensate disposal system, the piping, and
the fittings are made of acid resistant material like plastics.
WARNING
The condensate trap outlet shall NOT be modified or
blocked.
CAUTION
The condensate discharge piping diameter must be large
enough so as not to restrain the condensate water flow.
WARNING
If the discharge pipe is located outdoors, take measures
against frost.
4.8.8 Guidelines for condensate piping
termination
Condensate piping can be connected to a termination in different
ways shown below:
Terminating into an internal soil and vent stack
ba
≥450 mm
a Air breaker
b Internal soil and vent stack
Terminating into an external waste system
a
a Open end direct into gully, below ground but above water
level
Terminating into an external purpose made soakaway
a
b