Worcester Greenstar 12/18 Installation, Commissioning And Servicing Instruction Manual page 29

Double pipe sub-gravity feed system and single pipe suction lift with
de-aerator:
Refer to figure 44.
▶ Prime the oil supply pipework to prevent oil pump damage.
▶ To prime a de-aerator [2], disconnect the flexible oil inlet hose [7]
from the isolation valve and place in a container of kerosene [6].
Connect a spare flexible oil hose [5], to discharge into container [6].
Open the isolating valve, turn on the power to the boiler and set the
programmer to ON. Prime the de-aerator until there is a steady flow
of oil into container [6]. Turn off the boiler then reconnect the
flexible oil inlet hose [7].
▶ Turn on the boiler, the oil level in the de-aerator will drop as the oil is
used until the oil is drawn from the tank. If the de-aerator empties and
the burner locks out before the oil is drawn from the tank prime the
de-aerator again.
▶ Open the isolating valve and the oil pump bleed valve [8] to
discharge into a suitable container once the boiler is started up.
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3
4
1
Fig. 44 Prime the oil supply pipework
[1] Oil supply
[2] De-aerator
[3] Return
[4] Flow
[5] Spare flexible oil hose
[6] Container of oil
[7] Oil pump flexible inlet hose
[8] Bleed and pressure gauge port
▶ Switch on the electricity supply to the boiler.
▶ Set the programmer to ON.
▶ Turn on the boiler control thermostat.
Fig. 45
Greenstar Danesmoor External ErP and External System
8
7 3
5
6
6720809437-25.1Wo
ErP - 6 720 813 288 (2014/09)
▶ Allow the burner to run through to 'lock-out' indicated by the
illumination of the lockout indicator on the lockout reset button [1],
(note: some systems will not lock out).
▶ If lockout occurs wait 2 minutes then press the lockout reset button
[1].
Fig. 46 Location of reset button
▶ Repeat the procedure at least 3 times or until a steady stream of oil,
without air, runs from the bleed port, then lock the bleed port.
▶ Switch off the boiler.
▶ Remove the oil pump filter, clean with kerosene and refit.
The internal filter is accessed by removing the oil pump cover.
▶ Safely dispose of the container/discharge.
▶ Fit a suitable pressure gauge to port [3] on the oil pump.
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5
Fig. 47 Oil pump ports/connections
[1] Vacuum gauge port
[2] Pressure adjuster
[3] Bleed and pressure gauge port
[4] Return connection
[5] Inlet connection
[6] Auxiliary pressure gauge port
Commissioning
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