Checking The Gas Rate; Domestic Hot Water; Finishing Commissioning; Replace Outer Casing - Worcester GREENSTAR 24i Junior Installation, Commissioning And Servicing Instructions

Meter
Natural Gas
< 2.5mbar
difference
19 - 23 mbar
Boiler inlet
1 mbar
drop
18 - 22 mbar
Fig. 67 Natural gas pressures
≤
Equal to or less than
Regulator
L.P.G.
< 4.0mbar
difference
32 - 45 mbar
Boiler inlet
2.5 mbar
drop
29.5 - 42.5 mbar
Fig. 68 L.P.G. pressures
NOTICE:
Do not continue commissioning until the correct gas
pressure is achieved.

5.5.2 CHECKING THE GAS RATE

▶ The gas rate should be measured at the gas meter after 10 minutes
operation at maximum.
See technical data section at the front of this manual.
▶ Where a gas meter is not available (e.g. L.P.G.) the CO/CO
checked to the units shown in the setting of the air/gas ratio, refer to
section 6.6.
▶ If pressure and gas rate are satisfactory press the service button again
and the boiler will return to normal operation.
– If left in the service mode the control will return to normal operation
after 15 minutes.
▶ Close the gas isolation valve.
▶ Remove the manometer.
▶ Re-seal the screw in the gas inlet pressure test point.
▶ Open the gas isolation valve.
▶ Ensure that there are no gas leaks.
▶ Replace the outer case.
6 720 802 047 (2013/05)

5.5.3 DOMESTIC HOT WATER:

Gas Control
valve Controlling the hot water temperature:
The hot water temperature can be set to between 40 an 60 °C using the
DHW temperature control.
DOMESTIC HOT WATER PRE-HEAT:
Pre-heat reduces the time taken to produce hot water at the tap and is
controlled by the ECO button.
▶ Press the ECO button to select either state:
16.5 - 20.5 mbar
1.5 mbar
drop
5.6
6720644744-44.2Wo

5.6.1 REPLACE OUTER CASING:

▶ Replace outer casing making sure that the securing points are
Gas Control
▶ Replace top two screws (1).
valve
▶ Tighten bottom two screws (2).
28 - 41 mbar
1.5 mbar
drop
6720644744-45.2Wo
must be
2
Fig. 69 Fitting case

5.6.2 FITTING FASCIA FLAP

▶ Present the flap up to the appliance with the hinge pins facing the
▶ Engage the left hand pin into the grey pivot. The hinge pin and pivot
▶ Support the flap in your left hand and with your right hand, bend the
▶ Close the flap.
– When the ECO button is not illuminated the boiler will be in pre-heat
mode (which will reduce the time taken to produce hot water at the
tap) - or -
– When the ECO button is illuminated the boiler will be in Economy
mode with pre-heat no longer active

FINISHING COMMISSIONING

properly located.
1.
1.
2.
appliance.
hole are both square, rotate the flap to ensure that the pin is located
in the pivot.
right side down. This should enable you to engage the right hand pin
in the pivot. Rotate the flap to ensure that the pins and pivots are
located securely.
COMMISSIONING
2.
33