Fs I 250 Solarc - Ariston NUOS FS 200 Instructions For Installation And Servicing

Sensor (S3)
Shares pocket
with overheat stat
Sensor (S2)
Fitted to Electric
Heater Flange
F . 6.11 NUOS FSi 250 O
IG B
in the event of the stored water going over temperature, the heat input to
the cylinder is isolated by physical means and is non self resetting. These
systems should be clearly identified with reference to the approvals body.
(See Note 2)
Note 1 :Whilst most solar cylinders use a coil type heat exchanger
other options such as external plate to plate devices , external annulars
or 'tank in tank' systems may be used but the same control options always
apply.
Note 2 :Current approved bodies include the British Board of Agreement
(BBA) , WRc-NSF Limited, or KIWA
NUOS
Sensors
FSi 250 from
Solar
Controller
S W (
VERHEAT TAT IRING TYPICAL
Switched Live,
Neutral and Earth
from
Solar Controller
NUOS FSi 250
Manual Reset
Overheat
Stat NC
brown
blue
g/y
)
Solar
Pump
29
29