Controlling extension of the boiler
is shared with alarm extension.
Deactivating additional boiler
control will cause that this
extension will be controlled by
module of controlling alarms.
When pellet boiler is fired-up, and its
temperature exceeded preset value i.e. 25 C
degrees, then controller switches off
additional boiler (it will give constant power
AC 12V for terminals 39-40). It will power
the coil of relay and disconnecting its joints.
After decreasing boiler temperature below
parameter temperature of additional boiler
switching off the controller stops giving
power to joints 39-40 which should activate
the additional boiler.
Switching the controller into
STAND-BY mode causes
deactivating the additional boiler.
Hydraulic scheme with additional boiler in open
– closed circuit, where: 1- controller, 2- additional
boiler, 3- relay, 4- switching valve (with end switchers)
Presented hydraulic scheme does not replace project
of central heating and is only a sample!
Pic. 25
Hydraulic scheme with additional boiler in
open – closed circuit, where: 1- controller, 2-
additional boiler, 3- relay, 4- switching valve (with
end switchers), 5- heat exchanger, recommended
setting: priority HUW = deactivated, heat
exchanger = YES
Pic. 26 Electrical scheme of controlling the
switching valve of additional boiler, where: 1-
controller, 2- additional boiler, 3- relay, 5-
servomotor of switching valve (with end
Presented hydraulic scheme does not replace project
of central heating and is only a sample!
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