Unical NOVAIREX Series, Installation And Maintenance Instructions Manual

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3.12.2 - NOVAIREX BOILER SYSTEM FOR HEATING AND FOR THE PRODUCTION OF
DOMESTIC HOT WATER, WITH SINGLE-COIL TYPE STORAGE TANK
Mors. 6 p. VERDE Mors. 9 p. GRIGIO
J4
Morsett. 7 poli colore VERDE Morsett. 9 poli colore GRIGIO
IR
RMV
P2
S5
S4
A
B
AB
P3
P2
S4 S5 SF
Micr
o por
ta TA
P3
S3
SF
VE
S3
Key:
IR: heating system
P2: recirculation/system pump
P3:
storage tank pump
RMV:
mixing valve (55°C)
SF: flue gas probe
S3: storage tank temperature sensor
S4: flow temperature sensor of the boiler
S5
: return temperature sensor of the boiler
VE
: expansion vessel
In the following configuration pump
P2
is a recirculation pump
until the temperature detected by probe S4 does not meet the
value set by parameter P1 ; If a DHW request is active, pump
P2 switches off and pump P3 switches on to meet the storage
tank's requirements.
If however there is a demand for heating pump
P2
turns into
system pump, remains in operation and is controlled by the
room thermostat.
The counter-exchange is controlled by the temperature differ-
ence detected between probe
S4
and
S3
causes pump
P3
to
stop.
The fan stops when probe S4 reaches the temperature set in
parameter P0.
Probe
S5 allows the system's return temperature to be con-
trolled.
Probe
S3 detects the storage tank temperature.
Pump
P3
of the storage tank is activated when probe
S3
reach-
es the temperature set in parameter
P5
and is disabled when
S3 reaches the temperature set in parameter P6 .
Door micros
witch