Final Checks; Maintenance - Riello GAS 9/2 Installation, Use And Maintenance Instructions

FINAL CHECKS

• Disconnect one of the wires on the minimum
gas pressure switch:
• Open remote control device TL:
• Open remote control device TS:
the burner must stop
• Disconnect the common wire P from the air
pressure switch:
• Disconnect the ionisation probe lead:
the burner must lock out
• Make sure that the mechanical locking sys-
tems on the various adjustment devices are
fully tightened.

MAINTENANCE

Notes on safety for the maintenance
The periodic maintenance is essential for the
good operation, safety, yield and duration of the
burner.
It allows you to reduce consumption and pollut-
ing emissions and to keep the product in a relia-
ble state over time.
DANGER
Before carrying out any maintenance, cleaning
or checking operations:
DANGER
DANGER
Maintenance frequency
The gas combustion system should be checked
at least once a year by a representative of the
manufacturer or another specialised technician.
Safety test - with gas ball valve closed
It is fundamental to ensure the correct execution
of the electrical connections between the gas so-
lenoid valves and the burner to perform safely the
commissioning.
For this purpose, after checking that the connec-
tions have been carried out in accordance with
the burner's electrical diagrams, an ignition cycle
with closed gas ball valve -dry test- must be per-
formed
1 The manual ball gas valve must be closed
2 The electrical contacts of the burner limit
switch need to be closed
3 Ensures closed the contact of the low gas
pressure switch
4 Make a trial for burner ignition.
The start-up cycle must be as follows:
– Starting the fan for pre-ventilation
– Performing the gas valve seal control, if pro-
vided
– Completion of pre-ventilation
– Arrival of the ignition point
– Power supply of the ignition transformer
– Electrical Supply of solenoid gas valves.
Since the manual gas ball valve is closed, the
burner will not light up and its control box will go
to a safety lockout condition.
The actual electrical supply of the solenoid gas
valves can be verified by inserting a tester. Some
valves are equipped with light signals (or close/
open position indicator) that turn on at the same
time as their power supply.
18
(with burner running)
The maintenance interventions
and the calibration of the burner
must only be carried out by quali-
fied, authorised personnel, in ac-
cordance with the contents of this
manual and in compliance with
the standards and regulations of
current laws.
disconnect the electricity sup-
ply from the burner by means of
the main switch of the system;
close the fuel interception tap.