Water Treatment; Starting The Appliance; Single Pipe Gravity Feed System; Double Pipe Sub-Gravity Feed Systems And Single Pipe Suction Lift With De-Aerator - Bosch WORCESTER Greenstar Danesmoor 18/25 Installation, Commissioning And Servicing Instruction Manual

6.3

Water treatment

NOTICE:
▶ Salt based, softened water must not be used to fill
the central heating system.
Ensure that the system has been cleaned. Refer to section 4.1.2 of
these instructions.
Flushing (Central Heating)
▶ Ensure the appliance is switched off.
▶ Open all drain cocks and drain the system while the appliance is hot.
▶ Close drain cocks and add a suitable flushing agent at the correct
strength for the system condition in accordance with the
manufacturer's instructions.
▶ Run the appliance/system at normal operating temperature for the
time stated by the manufacturer of the flushing agent.
▶ Drain and thoroughly flush the system to remove the flushing agent
and debris.
Inhibitor (Central Heating)
▶ Check drain cocks are closed and all radiator valves are open before
adding a suitable inhibitor or combined inhibitor/anti-freeze, if the
system is exposed to freezing conditions, to the heating system
water in accordance with the manufacturers instructions.
The pH value of the system water must be between 6.5
and 8 or the appliance warranty will be invalidated.
▶ Fill system via a WRAS approved filling loop to between 1 to 1.5 bar.
▶ Vent all radiators; tighten vents when complete.
▶ Re-pressurise if necessary to 1bar.
▶ Set all controls to maximum.
▶ Record the date when the inhibitor was added to the system in the
Boiler commissioning checklist and in the guarantee registration.
NOTICE:
▶ The concentration of inhibitor in the system should
be checked every 12 months or sooner if system
content is lost.
▶ In cases where all attempts to find a micro leak have
failed, Worcester, Bosch Group supports the use of
Fernox F4 leak sealer.
Water treatment products
Suitable water treatment products can be obtain from the following
manufacturers:
ADEY 01242 546717 or www.adey.com
FERNOX 0870 601 5000 or www.fernox.com
SENTINEL 0800 389 4670 or www.sentinel-solutions.net
6.4

Starting the appliance

NOTICE:
▶ Never run the appliance when the appliance/system
is unpressurised (sealed systems) or empty.
1. Check the oil supply is correctly fitted, pressure tested and in good
working order before turning on the oil supply valves to the boiler.
▶ Turn on the main oil supply valve at the tank and draw off at least
2.5 litres of oil until a steady flow of clear uncontaminated oil can be
seen as follows:
– The oil supply to the boiler should be primed before the burner is
operated to avoid unnecessary pump wear.
– The use of an oil suction pump will prime and flush through any oil
supply set up simply and easily, alternatively the following
procedures can be used.
Greenstar Danesmoor Kitchen ErP+ and Kitchen System
6.4.1
▶ Disconnect the flexible oil hose and open the isolating valve to
discharge the oil into a suitable container.
▶ If a top entry tank has been used the pipework will need to be primed
before the oil will discharge under gravity.
▶ When completed, close the isolating valve, reconnect the flexible oil
hose.
When the oil reaches the pump, bleed the air from the pump:
▶ Open the isolating valve and the oil pump bleed port [1] to discharge
into a suitable container once the boiler is started up.
▶ Switch on the electricity supply to the boiler.
▶ Set the programmer to ON for CH and DHW.
▶ Turn on the boiler CH control thermostat.
▶ Allow the burner to run through to lockout .
Fig. 66
[1]
[2]
[3]
[4]
If no oil comes out of the port valve A, then re-prime the oil line as
detailed above
▶ Wait two minutes then press the lockout reset button [J].
▶ Repeat the procedure until a steady stream of oil, without air, runs
from the bleed port, then lock bleed port [A].
▶ Switch off the boiler.
Fig. 67
6.4.2
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 heating oil[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].
ErP+ - 6 720 821 686 (2018/04)

Single pipe gravity feed system

Bleed and pressure gauge port
Vacuum gauge connection
Pressure adjuster
Cover retaning screws x4
H
6720808218-56.1Wo
Double pipe sub-gravity feed systems and single pipe
suction lift with de-aerator:
Commissioning
4
3
2
1
6720821683-11.1Wo
J
41