Bosch WORCESTER GREENSTORE Installation Manual download pdf (Page 6)

COMMISSIONING SERVICING

FILLING

It is important that the inner cylinder is pressurized ﬁrst, followed

by the primary circuit.

Check the pressure in the DHW expansion vessel is 3 bar

(44PSI), i.e the same as the setting of the pressure reducing valve.

Before ﬁlling, open the hot tap furthest away from the

Greenstore cylinder to let air out. Open the cold main isolation

valve and allow the unit to ﬁll.

When water ﬂows from the tap, allow it to run for a short while

to ﬂush through any dirt, swarf or ﬂux residue.

Close the tap and open every other hot tap in turn to purge all

remaining air.

The primary circuit can now be ﬁlled.

PRIMARY CIRCUIT - INDIRECT UNITS

Consult the Worcester Bosch commissioning instructions and ﬁll

the primary circuit.

STORAGE TEMPERATURE

In many applications the guidance on Legionella control and safe

water delivery temperatures will require storing the water at 60-

65°C, distributing at 50-55°C and using thermostatic mixing valves

to control the ﬁnal temperature.

SAFETY VALVE CHECKS

In order to check correct operation of both the expansion and

temperature/pressure relief valves, fully open them allowing as

much water as possible to ﬂow through the tundish. Check that the

discharge pipework is free from debris and is carrying the water

away, to waste, efﬁciently. Release the valves and check that they

reseat properly.

During heat-up of the cylinder there should have been no sign

of water discharge from either the expansion relief valve or the

temperature / pressure relief valve.

SPARE PARTS

Worcester carry the full range of spares listed below in stock.

If you order before noon we will dispatch the same day

for delivery the next day to most locations.

8 716 113 407 0 - Inlet control set (pressure reducing valve,

strainer and expansion relief valve )

8 716 113 409 0 - Tundish

8 716 113 416 0 - 19 litre Expansion Vessel

8 716 113 418 0 - 24 litre Expansion Vessel

8 716 113 415 0 - Bracket, Expansion Vessel

8 716 113 414 0 - Hose, Expansion Vessel ( 3/4” M x 3/4” F )

8 716 113 439 0 - Allen Key

8 716 113 440 0 - Olive, Blanking 22mm

8 716 113 441 0 - Olive, Blanking 15mm

8 716 113 442 0 - Washer

8 716 113 498 0 - Solar High Limit Stat

8 716 113 473 0 - Temperature/Pressure relief valve

8 716 112 318 0 - Hot water sensor GT3

SERVICING

GENERAL

Servicing should only be carried out by competent installers

and any spare parts used must be purchased from Worcester.

NEVER bypass any safety devices or operate the unit without

them being fully operational.

WARNING:

WATER DRAINED OFF MAY BE VERY HOT!

DRAINING

Isolate the unit from the cold mains.

Open a hot water tap at the lowest position in the building, to

reduce the pressure.

Remove the mains water inlet connection. Attach a ﬂexible hose to

the connection on top of the cylinder, ensuring the hose reaches to

a level well below the unit (The greater the difference in elevation,

the greater the ﬂow rate and the maximum amount of water drained

from the cylinder).

Disconnect the hot water outlet.

Start the siphon effect, by either sucking or pumping the drain side

of the ﬂexible hose.

Allow the cylinder to drain completely.

FLUSHING THE TANK

To ﬂush the cylinder, follow the procedure for draining. Connect a

hose to the hot water outlet and then ﬂush the system.

WARNING:

POSSIBLE SCALDING!

ANNUAL MAINTENANCE

Greenstore cylinders require an annual service in order to

ensure safe working and optimum performance.

It is essential that the following checks are performed by a

competent installer on an annual basis. This is done at the same

time as the annual heat pump and solar service.

1) Twist the cap of the expansion relief valve on the inlet

control set and allow water to ﬂow for 5 seconds. Release

and make sure it resets correctly. Repeat with the pressure

/ temperature relief valve.

In both cases check that the discharge pipework is carrying the

water away adequately. If not check for blockages etc. and

clear.

2) Check the pressure in the DHW expansion vessel is charged to

3 bar. Turn off the water supply to the unit and open a hot tap

ﬁrst.

3) Unscrew the head on the inlet control set and clean the

mesh ﬁlter within.

4) The benchmark log book, in the back of this manual, must be

updated at each service.

YOUR GUARANTEE MAY BE VOID WITHOUT

PROOF OF ANNUAL SERVICING

6 COMMISSIONING AND SERVICING

Worcester Bosch Greenstore

THE GUARANTEE

The Greenstore cylinder carries a 2 year guarantee against faulty

materials or manufacture provided that:

• It has been correctly installed as per this document and all the

relevant standards, regulations and codes of practice in force at

the time.

• It has not been modiﬁed in any way.

• It has not been misused, tampered with or subjected to neglect

• It has only been used for the storage of potable water.

• It has not been subjected to frost damage.

• The unit has been serviced annually

• The benchmark log book has been ﬁlled in after each annual service

• The guarantee provided starts from the date of commissioning

• Building Control notiﬁcation is required

Please note that invoices for servicing may be requested to prove

that the unit has been serviced annually.

All the components ﬁtted to / or supplied with the Greenstore

cylinder carry a 2 year guarantee.

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Bosch WORCESTER GREENSTORE Installation Manual Page 6

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