Normal operation
Installation, use and maintenance manual – Next-R
41
6
supply switch. This may be harmful and dangerous for
the appliance and for the system.
Checks before switching on
Before switching on the appliance, ensue that:
gas valve open
appliance electrical power supply (main switch ON)
connection and any necessary power supply of the con-
trol device
After a long period of unit inactivity or at the
fi
rst start-up,
it may be necessary to repeat the ignition operation due
to the presence of air in the gas piping.
6.2.1
OCDS012 1-key basic control
Space heating activation
1.
Ensure that contact 1-3 is closed by the factory installed
temporary jumper. If a summer/winter selector switch (Para-
graph 4.4.6.2
32) has been installed, ensure that the se-
lector switch is in the "winter" position (contact 1-3 closed).
2.
Switch on Z9 contact using the provided control device
(thermostat, chronothermostat or voltage-free contact).
3.
After the purge time (around 40 seconds), the gas solenoid
valve opens and the burner ignites.
4.
When the
fl
ame is detected, the control box keeps the gas
valve open.
5.
Otherwise, the control unit will try the ignition again 3 times,
after the appropriate purge time. If the
fl
ame does not ignite
anyway, the control unit locks the unit and light the locking
state indicator lamp (B) on the control (Figure 6.1
41).
6.
In case of
fl
ame locking, press the reset button (A).
Figure
6.1
1-key basic control
A
Reset button
B
Lockout indicator lamp
A
B
Space heating shutdown
1.
Switch o
ff
space heating request by opening Z9 contact us-
ing the provided control device (thermostat, chronothermo-
stat or voltage-free contact).
2.
The burner will shut down, while the fans will continue to
operate until the appliance has cooled down completely.
In case of prolonged periods of inactivity, see Paragraph
7.5
44.
Ventilation activation (summer mode)
1.
Close the gas valve and check power supply availability to
the unit.
2.
Using a suitable summer/winter selector switch (Paragraph
4.4.6.2
32), select summer mode (contact 1-3 open, con-
tact 1-2 closed). This way the fan only will start.
3.
To stop the fan press again the selector switch on winter po-
sition (contact 1-2 open).
It is recommended that the heating request is deacti-
vated during the summer season by opening contact
Z9 by means of the provided control device (thermostat,
chronothermostat or voltage-free contact).
6.2.2
OCTR000 2-key basic control
Space heating activation
1.
Set the summer/winter selector switch (A) in the winter posi-
tion
(Figure 6.2
2.
Switch on Z9 contact using the provided control device
(thermostat, chronothermostat or voltage-free contact).
3.
After the purge time (around 40 seconds), the gas solenoid
valve opens and the burner ignites.
4.
When the
fl
ame is detected, the control box keeps the gas
valve open.
5.
Otherwise, the control unit will try the ignition again 3 times,
after the appropriate purge time. If the
fl
ame does not ignite
anyway, the control unit locks the unit and light the locking
state indicator lamp (C) on the control (Figure 6.2
41).
6.
In case of
fl
ame locking, press the reset button (B).
Figure
6.2
2-keys basic control
A
Summer/winter selector switch (
space heating operating mode;
summer operating mode, ventilation only)
B
Reset button
C
Lockout indicator lamp
A
B
C
Space heating shutdown
1.
Switch o
ff
space heating request by opening Z9 contact us-
ing the provided control device (thermostat, chronothermo-
stat or voltage-free contact).
2.
The burner will shut down, while the fans will continue to
operate until the appliance has cooled down completely.
In case of prolonged periods of inactivity, see Paragraph
7.5
Ventilation activation (summer mode)
1.
Close the gas valve and check power supply availability to
the unit.
2.
Set the summer/winter selector switch (A) in the summer
position
(Figure 6.2
41). This way the fan only will
start.
3.
To stop the fan press again the selector switch on winter po-
sition
.
It is recommended that the heating request is deacti-
vated during the summer season by opening contact
Z9 by means of the provided control device (thermostat,
chronothermostat or voltage-free contact).
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