Bedienungsanleitung Remeha Gas 3002 (Seite 10 von 36) (Holländisch)

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Remeha Gas 3002

5.2.5 Noise levels

The noise level in the boiler house, measured at a dis-

tance of 1 meter around the boiler, is approx. 60 dBA,

which means that it is usually not necessary to use

sound absorbent material.

5.2.3 Water circulation

The water ﬂ ow through the boiler is limited to an amount

corresponding with a differential temperature across the

boiler of 45°C. If the differential temperature exceeds

45°C the boiler is turned off and blocked. See also para.

7.5.3. As soon as the ﬂ ow is again sufﬁ cient, the boiler

will automatically restart.

The minimum water circulation in the boiler is deter-

mined by the following formula:

This minimum ﬂ ow must be maintained for 5 minutes

after the burners stops ﬁ ring to avoid high temperature

shut-down due to residuel heat gain.

Due to the design and manufacture of the boiler no

speciﬁ c minimum water ﬂ ow requirements exists other

than hightemperature protection.

The maximum water circulation in the boiler is deter-

mined by the formula:

Output boiler in (kW)

..... m

Output boiler in (kW)

..... m

9.3

5.2.4 Water treatment

The system should be ﬁ lled with mains cold water (for the

UK this will usually have a pH of between 7 and 8).

Pressurised installations with a boiler/system content

ratio of 1:10 or less should not require water treatment,

provided that the following conditions apply:

1. The system is ﬂ ushed thoroughly to remove all ﬂ uxes

and debris and ﬁ lled completely once.

2. Make up water is limited to 5% per annum.

3. The hardness of the water does not exceed 360 ppm.

(200D).

All scale deposits will reduce the efﬁ ciency of the boiler

and should be prevented. However provided the above

is complied with any scale produced will not be too

detrimental to the boiler efﬁ ciency and will not reduce the

anticipated life expectancy of the boiler.

NOTE: Scale desposits in excess of 5mm will reduce

boiler efﬁ ciency and greatly increase the risk of

premature casting failure

As most systems contain a variety of metals wich can

react with each other to cause corrosion. It is considered

good practice to provide some form of water treatment

(especially in open vented systems) in order to prevent or

reduce the following.

a) Metallic corrosion

b) Formation of scale and sludge

c) Microbiological contamination

d) Chemical changes in the untreated system

water

Suitable chemicals and their use should be discussed

with a specialist water treatment company prior to

carrying out any work.

The speciﬁ cation of the system and manufacturers rec-

ommendations must be taken into account, along with

the age and codition of the system. New systems should

be ﬂ ushed thoroughly to remove all traces of ﬂ ux, debris,

grease and metal swarf generated during installation.

Care to be taken with old systems to ensure any black

metallic iron oxide sludge and other corrosive residues

are removed, again by thoroughly ﬂ ushing, ensuring that

the system is drained completely from all low points.

NOTE: Please ensure that the new boiler plant is not in

circuit when the ﬂ ushing takes place, especially if

cleansing chemicals are used to assist the proces.

Under no circumstances is the boiler to be operated

with cleaning chemicals in the system

To Summarise: Minimise water loss

Prevent pumping over in open vented

systems.

Provide adequate air venting at all high

points.

Keep pH level between 7-11 when using

additives.

Maximum chlorine content of 200 mg/1

Take advice on suitability of inhibitors

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