GREENSTAR 12Ri ErP, Installation, Commissioning And Servicing Instructions

Page: 35 / 56

SERVICE AND SPARES
Greenstar Ri ErP - 6 720 813 283 (2015/07) 35
FAN PRESSURE TEST
Fig. 53 Fan pressure test
▶ Remove the cover and connect a digital manometer to the fan
pressure test point.
▶ The pressure will read negative, refer to the chart in figure 54.
▶ After measurement replace test point cover and return mode switch
to normal.
▶ Replace the control cover.
▶ Replace outer case.
Fig. 54 Fan pressure readings
If the boiler fails the fan pressure test then before adjusting the air/gas
ratio, try the following:
▶ Check the syphon is not blocked.
1. Remove the screws securing the sump cover.
2. Remove the sump cover.
3. Clean the sump with a suitable brush.
▶ Check the exhaust path and flue for restriction.
▶ Re-check the Fan Pressure readings
Fig. 55 Sump access
7.5 FLUE GAS ANALYSIS
COMBUSTION TEST:
▶ Connect the flue gas analyser to the flue gas sampling point as shown
in the figure below.
▶ Run the boiler at maximum output for at least 10 minutes.
▶ Check the CO/CO
2
readings against the information in table 30 CO/
CO
2
settings on page 36.
Fig. 56
If the boiler fails the combustion test, check:
1. Air intake for restriction
2. Diaphragm in the fan, for correct operation
3. Cleanliness of the heat cell, plus blockages in the condensate
disposal.
NOTICE:
The boiler must be run at maximum output for Fan
Pressure test and the Flue Gas analysis.
6720804530-13.1W
o
NG Boilers
0 -6 -5 -4 -3 -2 -1 -8 -7
mbar
- 7.4
- 3.1
18 Ri:
24 Ri:
12 Ri:
15 Ri:
- 3.6
- 5.5
LPG Boilers
0 -6 -5 -4 -3 -2 -1 -8 -7
mbar
FAN PRESSURE TEST
Clean the Heat Ex. Heat Ex. ok
- 8.0
- 4.1
18 Ri:
24 Ri:
12 Ri:
15 Ri:
- 3.9
- 5.8
6720644744-39.1W
o
Ensure that the gas inlet pressure has been checked and
is satisfactory,
refer to section 6.5.1
6720644744-40.1Wo
1.
1.
2.
3.
6720804530-14.1W
o