Maintenance
54
7
will glow when the contact is closed, indicating the pres-
ence of a fault.
6.6.2
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.
6.6.3
Reset
To reset a fault, the following options are available:
▶
Using the specific button, with the 1- or 2-key option-
al basic control, OTRG005 thermoregulator, OCDS008
digital chronothermostat, or OSWR000 Genius soft-
ware.
▶
Via the appropriate function of the OCDS015 Modbus
remote control.
▶
If applicable, via the appropriate function of the
generic Modbus controller (refer to the documenta-
tion of the Modbus controller used).
▶
Via menu 2, accessing parameter 21 (Paragraph
6.4
p. 52) and pressing
.
6.7
EFFICIENCY
For increased appliance efficiency:
▶
Install horizontal flow units observing requirements
on height above ground (Figure 2.2
▶
Direct the warm air flow downwards, using the hori-
zontal louvres of the delivery grille, respecting the in-
structions given in Paragraph 2.3
▶
Position the thermostat/control system according to
the guidelines given in Paragraph 4.4.9
▶
Program appliance activation for actual periods of use.
▶
Keep the fan grilles clean.
▶
Reduce repeated switch-ons to the minimum.
▶
Take advantage of the appliance's heat output mod-
ulation.
7
MAINTENANCE
7.1
WARNINGS
Correct maintenance prevents problems, assures
efficiency and keeps running costs low.
Maintenance operations described herein may ex-
clusively be performed by the TAC or skilled main-
tenance technician.
Any operation on internal components may exclu-
sively be performed by the TAC.
Before performing any operation, switch off the
appliance by means of the control device and wait
for the end of the shutdown cycle, then disconnect
power and gas supply, by acting on the electrical
disconnector and gas valve.
The efficiency checks and every other "check and
maintenance operation" (see Table 7.1
must be performed with a frequency according to
current regulations or, if more restrictive, according
to the provisions set forth by the manufacturer, in-
staller or TAC.
Responsibility for efficiency checks, to be carried
out for the aims of restricting energy consumption,
lies with the system manager.
7.2
SCHEDULED ROUTINE
MAINTENANCE
Perform the operations in the following Table 7.1
on an annual basis.
Table 7.1
Scheduled routine maintenance
Next-G Next-R
M
Ordinary scheduled maintenance
Check of the
unit
clean the burner
√
√
√
clean the ignition and
flame sensor electrodes
√
√
√
clean the fan
√
√
√
clean the blower/exhaust
fan
√
√
√
check the % value of CO
2
√
√
√
check the unit safety
devices
√
√
√
check that the condensate
discharge is clean
√
-
-
7.3
RESETTING THE TEMPERATURE LIMIT
THERMOSTAT
The temperature limit thermostat stops the burner in case
of appliance overheating.
Resetting is carried out by pressing the button on the back
of the unit (detail 6 on dimensional diagrams, Paragraph
1.2
p. 8), after unscrewing the protective cap (see
Figure 7.1
p. 55). Set back in place the protective cap
after resetting the thermostat.
Resetting of the temperature limit thermostat
should be carried out by qualified service per-
sonnel, after removing the cause of overheating.
