55
MAXIN 24e & 28e
11.6.6
11.6.6
11.6.6
11.6.6
11.6.6
Reduce the domestic water flow rate to
approximately 3-4 litres/min, turn the
domestic control knob slowly to minimum
the boiler output will reduce to the minimum
setting. If low flame cannot be established
in this way, turn off the electricity supply,
remove the modulator coil retaining clip and
slide the modulator coil off the brass rod.
Switch on the electricity supply, the boiler
will now light at the minimum setting.
11.6.7
11.6.7
11.6.7
11.6.7
11.6.7
When low flame is established the pressure
reading should be :
24e
24e
24e
24e
24e
5.1mbar/2.0in. wg
(Plus or minus 0.5mbar/0.2in. wg)
28e
28e
28e
28e
28e
4.3mbar/1.69in. wg
(Plus or minus 0.43mbar/0.16in. wg)
If it is different adjustment should be made
in accordance with the instructions in clause
8.23.
11.6.8
11.6.8
11.6.8
11.6.8
11.6.8
If the modulator coil was removed to check
the minimum setting, turn off the electricity
supply and replace the modulator coil.
11.7
11.7
11.7
11.7
11.7
Setting the Maximum Rate for Central
Setting the Maximum Rate for Central
Setting the Maximum Rate for Central
Setting the Maximum Rate for Central
Setting the Maximum Rate for Central
Heating (Range Rating)
Heating (Range Rating)
Heating (Range Rating)
Heating (Range Rating)
Heating (Range Rating)
Refer to fig. 39 to determine the pressure
for the heating output required. Turn on the
heating with the control knob set at maxi-
mum, wait for the burner to reach main
flame. Remove the printed circuit board
cover by releasing the retaining screws.
Using a small screwdriver to adjust the
potentiometer fig. 21 until the required
pressure is indicated on the gauge. Once
this pressure has been fixed it should be
indelibly recorded on the label provided and
affixed next to the data badge. This is to
ensure that the burner can be reset when
any service operation involves alteration of
burner settings.
11.8
Setting the Minimum Rate for Central
Heating
Turn the central heating thermostat to the
minimum setting and wait for the burner to
modulate down to the minimum rate.
The gas pressure should now be:
24e
6.5 mbar / 2.55 in w.g.
plus or minus 0.65 mbar / 0.25 in w.g.
28e
5.5 mbar / 2.16 in w.g.
plus or minus 0.55 mbar / 0.21 in w.g.
If the reading is incorrect it should be
adjusted as follows:
With the boiler still in central heating mode
and the burner at the minimum rate, using a
small screwdriver turn the left hand potenti-
ometer fig. 35 clockwise to increase & anti-
clockwise to decrease the C/H minimum
gas pressure.
mbar
40
35
30
25
20
15
10
5
3 0 3 5 4 0 4 5 5 0 5 5 6 0 6 5 7 0 7 5 8 0 8 5 9 0 9 5 1 0 0
24e
28e
Btu/h x 1000
Fig. 39
Содержание Maxin 24e
Страница 53: ...52 MAXIN 24e 28e GENERAL LAYOUT ILLUSTRATED WIRING DIAGRAM Fig 38...
Страница 57: ...Cod 10022256 19 01 Ed 1...
