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Installat
ion and User Instructions R01128
-8 09/15
Page
26
Installation
5.7 Thermostat connection
The solar circulation pump and the
auxiliary heating system can be wired
to the cylinder in various ways as
described by the chosen supplier.
To conform to building regulations, it is
imperative that any heat generator
connected to the cylinder is installed
through the correct twin thermostat,
which is factory fitted to the cylinder.
The two port valve supplied with the
solar indirect cylinder is to be installed
by default into the auxiliary heating
loop. If the cylinder is located higher
than the solar collector array, a two
port valve has to be installed in the
solar loop and wired accordingly.
Figure 8: Thermostat Wiring Schematic
T
1
T
2
T
3
NOTE: T1 and T2 must be connected. T3 can replace T2 only when
a normally open configuration is required.
To solar pump/
two port valve
From control unit
Temp
control
stat
High
temp cut
out stat
2
1
1
2
3
T4
Earth
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