Opening the casing
To open the boiler casing (fig. 23):
1. Undo the screws (1)
2. Open, turning the casing (2)
3. Lift and remove the casing (3)
Combustion analysis
Two sampling points have been provided at the top of the boiler, one for fumes and the other for air.
A
AIR sampling point
B
FUME sampling point
To take samples:
1. Insert the probes up to the stop.
2. Open a hot water tap.
3. Adjust the domestic hot water temperature to maximum.
4. Wait 10-15 minutes for the boiler to stabilise.
5. Take the measurement.
A
Analyses made with an unstabilised boiler can cause measurement errors.
78
1
1
fig. 23 - Opening the casing
A
fig. 24 - Combustion analysis
cod. 3540R880 - 01/2009 (Rev. 00)
NINFA N LOW NOX 24 MCS
3
2
B
EN