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4.6.2
Water Pressure Sensor Removal
•
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).
(8)
4.6.3
Flow Limiter removal (Only combi models)
•
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.
4.7
Flow Hydroblock Replacement
•
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).
D2CND024A1AA + D2CND024A4AA + D2TND012A4AA +
D2TND018A4AA + D2TND024A4AA
Wall-mounted condensing boiler
ESIE17-09 / 2017.11
(9)
(10)
•
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).
(1)
(2)
•
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)
(4)
4.7.1
Domestic Hot Water (DHW) NTC Sensor Remo-
val (Only combi models)
•
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 Part replacement
(3)
(5)
(6)
(7)
Servicing manual
19
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