8
S-plan Wiring
OSO Delta Coil cylinders can be fitted
with all types of boilers. Standard boilers
operate using room and cylinder thermo
-
stats. Please follow upper diagram: ‘Wir
-
ing for Standard Boiler’.
Many popular boilers now use a therm
-
istor principle. A thermistor temperature
sensor is supplied with the boiler to at
-
tach to the cylinder. Temperature infor
-
mation is relayed back to the boiler con
-
trol system.
A Pocket is provided (see below) to se
-
cure the sensor on the Delta Coil cylin-
der. The probe is run through a channel
from base of cylinder to the immersion
housing.
The supplied motorised valve must be
used in accordance with Building Reg-
ulation G3. This is wired from the sup
-
plied cylinder thermostat, temperature
on thermostat must be turned up to high
-
est setting. Please follow lower diagram:
‘Wiring for Thermistor Controlled Boiler’.
Both wiring plans shown is based on the
use of a 10-way Junction Box (Honey
-
well Part no.42002116-001). Junction
Box terminal 8 is switched live and, if
needed, terminal 10 is pump live.
