Necta Colibri - Page 12

NECTA SPA TECHNICAL MANUAL “COLIBRÌ”
Service Manual: Colibrì Edition 02-2002 12 /25
3.1 - BOILERS
The Colibri model is fitted with only one boiler of the pressure type, used in both the Espresso (mixed
solenoid valve assembly with two 2-way valves and one 3-way valve) and Instant versions; however this latter
version is fitted with three 2-way valves.
The basic espresso boiler is the same used in the Brio, Venezia etc., but the application is different; it is
pre-assembled as a functional unit on a support, complete with all functions and easily removable. For
information on all other features refer to the functional unit manual.
Back view of boiler detail
Bipolar safety
thermostat
Reset button
2/3-way solenoid
valve block
Instant version boiler
Using a complete block with three 2-
way solenoid valves
1 - For hot water
2 - For instant prod. 1
3 - For instant prod. 2
NOTE:
The difference between 2-way
and 3-way solenoid valves is:
1) 2-way: when activated it connects
inlet (first way) with outlet (second
way).
2) 3-way: when first activated it
connects inlet (1) with outlet
(2), when deactivated it
closes the second way and
opens the third way,
connected to the second way.
3) Excess liquid from brewing is
discharged through the third
way.
Pressure boiler
module
NTC Probe
Module screws