Normal operation
42
6
6.2.3
OTRG005 thermoregulator
Refer to the instructions in the relevant manual.
6.2.4
OCDS008 digital chronothermostat
Refer to the instructions in the relevant manual.
6.2.5
OSWR000 Genius software for remote
management of gas unit heaters
Refer to the instructions in the relevant manual.
6.2.6
External request
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, if any (Figure 4.4
29).
6.
In case of
fl
ame locking, press the reset button, if any
(Paragraph 4.4
29), or alternatively close contact 5-7
manually.
If there is no reset button, take the utmost care
during the reset operation, as contact 5-7 has a 230
V AC voltage at its terminals.
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.
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.
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).
6.3
EFFICIENCY
For increased appliance e
ffi
ciency:
▶
Install horizontal
fl
ow units observing requirements on
height above ground (Figure 2.2
▶
Direct the hot air
fl
ow downwards, using the horizontal lou-
vres of the delivery grille, respecting the instructions given
in Paragraph 2.3
20.
▶
Position the thermostat/control system according to the
guidelines given in Paragraph 4.4.7
34.
▶
Program appliance activation for actual periods of use.
▶
Keep the fan grilles clean.
▶
Reduce repeated switch-ons to the minimum.
▶
Use a control device (e.g. OTRG005 thermoregulator, option-
al) that allows exploiting the power modulation of the unit.
6.4
RESTARTING A LOCKED
-
DOWN UNIT
6.4.1
Fault signals
With the exception of the
fl
ame lock-out, detailed below, all
anomalies are reported only with the optional OTRG005 ther-
moregulator, and with the relevant controls, i.e the OCDS008
digital chronothermostat and OSWR000 Genius software.
Flame lockout
Flame lockout is signalled by closing contact 5-6 on the unit ter-
minal block.
If an indicator lamp (which is included when using option-
al 1- or 2-key basic controls, see Paragraph 1.6.2
17 and
1.6.3
17) is connected to this contact, the lamp will glow
when the contact is closed, indicating the locking status.
When multiple consecutive
fl
ame lockout signals occur,
it is recommended to check that the limit thermostat
has not been triggered due to overheating of the unit.
If this is the case, reset the limit thermostat and check
the causes of its intervention by quali
fi
ed personnel (see
also Paragraph 7.3
43).
6.4.2
Locked-down appliance
An external intervention (reset or repair) is required due to an
appliance fault.
▶
A reset may be enough for a temporary and provisional fault.
▶
For a fault or breakdown, alert the maintenance technician
or TAC.
6.4.3
Reset
The
fl
ame lockout can be reset:
▶
Using the speci
fi
c button, with the 1- or 2-key optional basic
control, OTRG005 thermoregulator, OCDS008 digital chron-
othermostat, or OSWR000 Genius software.
▶
By manually closing contact 5-7.
If there is no reset button, take the utmost care
during the reset operation, as contact 5-7 has a 230
V AC voltage at its terminals.
Other errors that allow resetting can be reset by power cycling
the unit.
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