D2CND0 D2CND0 D2TND0
D2TND0 D2TND024A4AA
Wall-mounted condensing boiler
ESIE17-09 / 2017.11
Servicing manual
19
•
Isolate the appliance from power supply and closedown
the gas valve.
•
Drain the water from the boiler (refer to Section 4.1).
•
Open the appliance (refer to Section 4.2 ).
•
Disconnect the two clips from on the right cover(refer to
Section 4.5)
•
Remove the right cover of the boiler (Unscrew the
screws that connection hermetic cabinet and right cover)
(refer to Section 4.5)
•
Remove the wire connector of the pressure sensor
kindly.
•
Remove the return pipe by using wrench(this is valid for
min. clearences condition. If clearances >50mm skip this
step)
•
Remove the D9 clip of the water pressure sensor by
help of flat screwdriver (8).
•
Manoeuvre the water pressure sensor and take out it
from the pump (9).
•
Follow the water pressure sensor removal steps.
•
Make sure that all water is drained from the boiler in
order to avoid leakage from flow limiter.
•
Remove the flow limiter with pincers (It is used only
C-model) (10).
•
After these operations, return hydroblock can be taken
out.
•
Re-assemble in reverse order.
•
Isolate the appliance from power supply and closedown
the gas valve.
•
Drain the water from the boiler (refer to Section 4.1).
•
Disconnect the DHW flow CH flow installation pipes from
the boiler by using wrench (refer to Section 4.1).
•
Open the appliance (refer to Section 4.2).
•
Take out the expansion vessel (refer to Section 4.10).
•
Remove the fastening clips (refer to Section 4.5).
•
Remove the safety pin (refer to Section 4.5).
•
Remove the pipe kindly (refer to Section 4.5).
•
Take out the filling valve by using wrench (1) (Only used
D2CND024A1AA model).
•
Unscrew the screw that connect flow hydroblock and her
-
metic cabinet (2) (only used Combi models).
•
Unscrew the 2 screws that connect flow hydroblock and
hermetic cabinet (3) (only used Tank models).
•
Unscrew M5 allen screw (4) that connects between flow
hydroblock and plate heat exchanger and take out the
flow hydroblock (only used Combi models)
•
Remove the By-pass hose from the flow hydroblok and
take out the flow hydroblock by wrench (5)
•
Isolate the appliance from power supply and closedown
the gas valve.
•
Drain the water from the boiler (refer to Section 4.1)
•
Remove the gas pipe from the gas valve side (refer to
Section 4.4).
•
Disconnect the DHW sensor’s wire connector (refer to
Section 4.3).
•
Remove DHW sensor by using wrench (6).
•
Re-assemble in reverse order.
•
When re-assembling the DHW NTC sensor,apply liquid
seal on the sensor threads (7).
4.6.2
Water Pressure Sensor Removal
4.6.3
Flow Limiter removal (Only combi models)
4.7
Flow Hydroblock Replacement
4.7.1
Domestic Hot Water (DHW) NTC Sensor Remo
-
val (Only combi models)
4 Part replacement
(10)
(7)
(6)
(4)
(5)
(2)
(1)
(3)
(9)
(8)
