31
6.3 - ELECTRICAL AND HYDRAULIC CONNECTIONS OF C.H.
AND D.H.W. PRODUCTION CIRCUITS
In the fig. 35 the typical connection of the
boiler to C.H. system with two heating zones,
of which one is with motorized mixing valve.
Both, the heating zones are controled by an
outer compensator.
The electrical connections of the heating
pumps and the mixing valve motor must be
connected strictly according to the schemas
shown in the figs. 31 & 33.
The temperature sensors will be connected
according to the schema shown in fig. 34.
Remember that all the TRISECAL 3P boilers
are for forced circulation.
It is suggested to adopt a shunt pump "Pr" to
guarantee the circulation through the boiler in
any possible open condition of the mixing
valve (see fig. 35).
The shunt pump “Pr”, which will have a
throughput equal, at least, at 50% of the C.H.
pump and a manometric of of 1 m W.G., will
perform also an anticondensation function,
limiting the too cold returns into the boiler.
The hydraulic schema shown in fig. 35 are
principle schema; in case of different system
circuits, contact, please, our after sale service
dept., which will supply you with all the
necessary informations.
fig. 35
B Storage tank
C1/C2 Boilers
P1 C.H. pump for direct zone
P2 C.H. pump for mixed zone
As far as the outer compensator adjustment and programming are concerned, refer to the instruction manual supplied with outer
compensator. The parameters which can be modified by the user, according to his needs, are shown on the clause 4.5.
Pb Storage tank loading pump
Pr Shunt pump
VM2 Mixing valve
KFS Boiler temperature sensor
SPFS Storage tank temperature sensor
VFAS Flow temperature sensor
