Normal operation
48
6
switch (Paragraph 4.4.6.2
p. 39
) has been installed,
ensure that the selector switch is in the "winter" posi-
tion (contact 1-3 closed).
2. Switch on Z9 contact using the provided control de-
vice (thermostat, chronothermostat or voltage-free
contact).
3. After the purge time (around 40 seconds), the gas so-
lenoid valve opens and the burner ignites.
4. When the 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 ame
does not ignite anyway, the control unit locks the
unit and light the locking state indicator lamp, if any
(Figure 4.4
p.36
).
6. In case of ame locking, press the reset button, if any
(Paragraph 4.4
p. 36
), 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 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 space heating request by opening Z9 con-
tact using the provided control device (thermostat,
chronothermostat or voltage-free contact).
2. The burner will shut down, while the fans will contin-
ue to operate until the appliance has cooled down
completely.
In case of prolonged periods of inactivity, see
Paragraph 7.5
p.50
.
Ventilation activation (summer mode)
1. Close the gas valve and check power supply availabil-
ity to the unit.
2. Using a suitable summer/winter selector switch
(Paragraph 4.4.6.2
p.39
), select summer mode (con-
tact 1-3 open, contact 1-2 closed). This way the fan on-
ly will start.
3. To stop the fan press again the selector switch on win-
ter position (contact 1-2 open).
It is recommended that the heating request is de-
activated during the summer season by opening
contact Z9 by means of the provided control de-
vice (thermostat, chronothermostat or voltage-free
contact).
6.3 EFFICIENCY
For increased appliance eciency:
▶
Install horizontal ow units observing requirements
on height above ground (Figure 2.2
p.26
).
▶
Direct the warm air ow downwards, using the hori-
zontal louvres of the delivery grille, respecting the in-
structions given in Paragraph 2.3
p.25
.
▶
Position the thermostat/control system according to
the guidelines given in Paragraph 4.4.7
p.41
.
▶
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,
optional) that allows exploiting the power modulation
of the unit.
6.4 RESTARTING A LOCKEDOUT UNIT
6.4.1 Fault signals
With the exception of the ame lock-out, detailed be-
low, all anomalies are reported only with the optional
OTRG005 thermoregulator, 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 terminal block.
If an indicator lamp (which is included when using option-
al 1- or 2-key basic controls, see Paragraph 1.6.2
p. 22
and 1.6.3
p. 22
) is connected to this contact, the lamp
will glow when the contact is closed, indicating the lock-
ing status.
When multiple consecutive ame lockout signals
occur, it is recommended to check that the limit
thermostat has not been triggered due to over-
heating of the unit. If this is the case, reset the limit
thermostat and check the causes of its interven-
tion by qualied personnel (see also Paragraph
7.3
p.49
).
6.4.2 Locked-out appliance
An external intervention (reset or repair) is required due
to an appliance fault.
▶
A reset may be enough for a temporary and provision-
al fault.
▶
For a fault or breakdown, alert the maintenance tech-
nician or TAC.
6.4.3 Reset
The ame lockout can be reset:
▶
Using the specic button, with the 1- or 2-key option-
al basic control, OTRG005 thermoregulator, OCDS008
digital chronothermostat, or OSWR000 Genius soft-
ware.
▶
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.
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