Necta Colibri - Pumps and By-Pass

NECTA SPA TECHNICAL MANUAL “COLIBRÌ”
Service Manual: Colibrì Edition 02-2002 13 /25
The internal temperature control is by means of an NTC type electronic probe fitted with an internal 12K ohm
(+/- 4 ohm) resistance at a temperature of 25° C.
As the internal temperature increases the resistance is reduced progressively as indicated in the following table.
Boiler temperature C° Value in ohm Allowable tolerance
0 35875 +/-7 ohm
25 12000 +/-4 ohm
50 2900 ,,
85 1475 ,,
90 1260 ,,
100 963 ,,
4 - PUMPS AND BY-PASS
Detail boiler module - pump end
T
he same pump used in the Brio is used to
supply the boiler.
T
he difference bein
g
in the application, as
pump, boiler and connections are positioned on
an easy-to-remove bracket (see photo); this
way full access is ensured for maintenance and
hygiene.
T
he pump has overheating protection in case of
continuous or dry operation by means of a 90°
C self-resetting klixon.
T
he b
y
-pass is factory pre-set at 12 bars.
T
he pump is activated by relay K 14.
KLIXON
Overheatin
g
protection
B
y
-
p
ass