54
EN
1 OPERATING WITH THE DUETTO HE 25-35 EV THERMAL UNIT
1.1
Control panel
The control panel enables all operators to make the necessary
adjustments for managing
Sime
DUETTO HE EV
thermal units
and the systems connected to them.
1
5
6
7
8
2
3
4
9
Fig. 1
1
Orange signalling LED
; system low pressure
2
Thermometer
3
Green signalling LED
; power supply
4
Heating thermostat (min 45°C - max 85°C)
5
Safety thermostat reset
6
Limit thermostat (calibration not modifiable)
7
Lock-out signal
(red indicator light)
8
Main switch
9
Summer/Winter switch
1.2
Preliminary checks
The initial start-up of the
DUETTO HE EV
thermal unit must be
carried out by professionally qualified personnel, after which
the appliance will function automatically. It may be necessary
for the user to restart the appliance autonomously, without con-
tacting the technician; for example, after a holiday. In this case,
the following checks and operations must be carried out:
– check that the fuel and water circuit shut-off valves are open
Fig. 2
– check on the pressure gauge (A) that the pressure of the heat-
ing system, when cold, is
1–1.2 bar
. If not, open the filling valve
(B) and refill the heating system until the pressure gauge (A)
shows a reading of
1–1.2 bar
– close the filling valve (B).
0
4
1
3
2
bar
A
1
B
Fig. 3
1.3
Ignition
After completing the preliminary checks, start up the thermal
unit:
– adjust the room thermostat to the desired temperature (~
20°C)
– set the main system switch to "ON"
ON
Fig. 4
– adjust the heating thermostat (4) to roughly 3/4 of the adjust-
ment range (corresponding to roughly 75°C)
– press the main switch (8) on the control panel and verify that
the green LED switches on (3)
4
8
3
1
0
Fig. 5
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