Sime RS Mk.II Instructions Pour L'utilisateur page 70

2. 1 6 RVA43.222
CONTROL UNIT
(optional)
All boiler functions can be controlled
by the optional contr ol unit code
8096303, supplied with an outdoor
temperature probe (SE) and boiler
immersion probe (SC) (fig. 14). Use of
the control unit requires connection of
an additional series of low voltage con-
nectors for connection of probes and
the room temperature control unit
(the connectors are supplied in a bag
in the control panel). The bulb of the
sensor of the external D.H.W. tank
(SS), optional code 6277110, must
be inserted in the hot water sheath
and the boiler probe (SC) in the boiler
sheath. To assemble the outdoor tem-
perature probe (SE), follow the instruc-
tions provided on its packaging. Refer
to the wiring diagram in fig. 13 for
electrical connections.
WARNING: to grant the correct
operation of the plant set the boi-
ler thermostat at the maximum
value.
2. 1 6. 1 Features and functions
"RVA 43.222" is realized as regulator
of one boiler mono or bi-stadium or
regulator of cascade connections to
manage 16 boilers maximum.
Economical operation
– Heat production may be turned on
or off in the presence of integration
with accumulation.
– Boiler temperature control on the
basis of climate, permitting environ-
mental compensation.
– Direct heating circuit management
(with pump) for each controller.
– Automatic adaptation to climatic
curve on the basis of the building's
thermal inertia and the presence of
"free heat" sources (with environ-
mental compensation).
– On/off optimisation (accelerated
heating and early off feature).
– Daily economy function calculated
on the basis of the dynamic charac-
teristics of the building.
– Automatic summer/winter switch.
Protective functions
– Minimum and maximum delivery
temperature settings.
– Differentiated anti-freeze protection
for boiler, hot water tank and hea-
ting system.
66
KEY
1 Plastic hole cover
2 Optional control unit
– Boiler overheating protection.
– Pump seizing up protection.
– Burner protection with minimum
operating temperature.
Operative functions
– Simplified start-up.
– All calibration operations are perfor-
med on control unit.
– Standard weekly programming.
– All calibration operations and opera-
ting settings can be read on leds
and display.
– Relay and probe tests.
Hot water production
– Daily scheduling.
– Minimum hot water delivery temperatu-
re may be set for reduced time period.
– Control of hot water tank filling pump.
– Selectable priority of hot water circuit.
KEY
1 Control unit connectors (black - red - brown)
2 Fuse (T 4 )
3 Terminal board
2 1
Other technical features
– Easy connection with digital environ-
mental unit (QAA 70).
2. 1 6.2 Electrical connection
The electrical circuit includes a series
of connectors for installation of an
optional control unit, marked with diffe-
rent colours: black, red and brown (fig.
14/a). Connectors are polarised so
that order cannot be inverted.
To install the control unit, connect these
connectors and remove jumpers 13 -
14 and 16 - 17 from the terminal board
(fig. 13). The control unit also permits
use of room temperature control units
and probes; polarised, coloured connec-
tors for these are located in a bag insi-
de the control panel.
2 1 3
Fig. 14
Fig. 14/a