Bosch Appliances 24i junior, 28i junior manual Key, Water Treatment

A

C

2

D

E

3

FG

4

H

I

J

KEY

Valve

Flushing

Agent

Inhibitor

1	5				WATER TREATMENT
							IMPORTANT: Debris from the system
		J					can damage the boiler and reduce
B							efficiency. Failure to comply with the
							guidelines for the use of water
							treatment with the appliance will
			K				invalidate the appliance warranty.
						ENSURE THAT THE SYSTEM HAS BEEN
						CLEANED AS ON PAGE 8 OF THESE
						INSTRUCTIONS.
						FLUSHING (Central Heating):
						1 Switch off the boiler (A).
							Open all drain cocks (B) and drain the
		L					system (C) while the appliance is hot.
						2 Close drain cocks (D) and add a suitable
							flushing agent (E) at the correct strength for
							the system condition in accordance with the
							manufacturer's instructions.
						3 Run the boiler/system at normal operating
							temperature (F) for the time stated by the
							manufacturer of the flushing agent (G).
						4 Drain (H) and thoroughly flush the system to
							remove the flushing agent and debris ( I ).
	7					INHIBITOR (Central Heating):
		M				5 Check drain cocks are closed ( J ) and all
							radiator valves are open (K) before adding a
							suitable*inhibitor (or combined inhibitor/anti-
							freeze if the system is exposed to freezing
							conditions) to the heating system water (L) in
							accordance with the manufacturers instructions.
						6 Fill system via a WRAS approved filling loop
							to between 1 and 2 bar.
						7 Vent all radiators; retighten vents when
							complete (M). Vent any air from the boiler
							heat exchanger using a suitable container to
				N			collect any water (N).
							Ensure tube outlet (O) is directed away
		O
							from the fan or any other electrical
							component to prevent damage. Also
							place a suitable cover over the fan to
							prevent any spillage of water onto
							electrical connections. Ensure the cover
							is removed after venting.
						8 Vent all radiators (P).
							Re-pressurise if necessary to 1bar (Q).
	8	P
							Set all controls to maximum (R).
							Record the date when the inhibitor was
							added to the system on the guarantee card.
						NOTE: The concentration level of inhibitor in
						the system should be checked every 12
						months, or sooner if system content is lost.
						The addition of sealing agents to the system
						water is not recommended as this can cause
	Q					problems with deposits left in the heat exchang-
						er.
					R
							* compatible with aluminium. The pH
							value of the system water must be
							less than 8 or the appliance guarantee
							will be invalidated.

COMMISSIONING

32

INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR 24 i junior/28 i junior 8 716 107 336b (11/05)

WATER TREATMENT