Combustion Check; Burner Start-Up Cycle; Maintenance; Faults / Solutions - Riello GS5 Installation, Use And Maintenance Instructions

4.3 COMBUSTION CHECK

CO 2
It is advisable to not exceed 10% of CO 2 (natural gas) , in order to avoid the risk that small changes of the
adjustments due, for instance, at draught variation, may cause combustion with insufficient air and conse-
quently formation of CO.
CO
Not exceeding 100 mg/kWh (93 ppm).
IONIZATION CURRENT
The minimum current necessary for the control box operation is 5 µA.
The burner would normally have a higher current value than this, but if a check is required, open the con-
nector fitted in the red probe lead and insert a microammeter as shown.
Control box
terminal board

4.4 BURNER START-UP CYCLE

Thermostat
Motor
Ignition transformer
Valves
Flame
Lock-out
When flame-failure occurs during working, shut down takes place within one second; and the cycle starts
again; a lock-out follows if the flame do not start.
5.

MAINTENANCE

The burner requires periodic maintenance carried out by a qualified and authorised technician in conformity
with legislation and local standards.
Maintenance is essential for the reliability of the burner, avoiding the excessive consumption of fuel and
consequent pollution.
Before carrying out any cleaning or control always first switch off the electrical supply to the
burner acting on the main switch of the system.
THE BASIC CHECKS ARE:
Leave the burner working without interruption for 10 min., checking the right settings of all the components
stated in this manual. Then carry out a combustion check verifying:
CO ( %) content
2
6.

FAULTS / SOLUTIONS

Here below you can find some causes and the possible solutions for some problems that could cause a fail-
ure to start or a bad working of the burner. A fault usually makes the lock-out lamp light which is situated
inside the reset button of the control box (1, fig. 1, page 1).
When lock out lamp lights the burner will attempt to light only after pushing the reset button. After this if the
burner functions correctly, the lock-out can be attributed to a temporary fault.
If however the lock out continues the cause must be determined and the solution found.
2773
2
Normal
35s min.
Smoke temperature at the chimney
Connector
Ionization probe
D5006
Lock-out, due to light-failure
5s max.
CO content (ppm).
7 GB
35s min. 5s max.
D5048