Water In Central Heating Systems - Riello ALU PRO power Series Instructions For The Installer And The Technical Assistance Centre

Aluminium condensing boilers

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Table Of Contents

Table of Contents

INTRODUCTION

It is ABSOLUTELY NECESSARY to treat the water system

for the heat generator to work properly and to guarantee

its service life together with all its components.

This not only applies to jobs carried out on existing instal-

lations but also on new installations.

Sludge, lime-scale and pollutants present in the water

can cause permanent damage to the heat generator, also

within a short time and regardless of the quality standards

of the materials used.

For additional information regarding the type and the use

of additives contact the Technical Assistance Centre.

THE WATER IN THE HEATING SYSTEMS.

INSTRUCTIONS FOR THE DESIGN, INSTALLATION AND MANAGEMENT OF THE HEATING SYSTEMS.

1. Chemical and physical characteristics

The chemical and physical characteristics of water used in central heating systems must conform to the requirements of

EN 14868 standard and to the following tables:

ALUMINIUM BOILERS

with furnace power < 150 kW

Initial filling

Hardness

°fH

Electrical

μs/cm

conductivity

Chlorides

mg/l

Sulphides

mg/l

Nitrides

mg/l

Iron

mg/l

(*) values for water in system after 8 weeks of operation

General note on water used to top up systems:

- if softened water is used to top up a system, after 8 weeks verify that the water in the system respects the above limits,

in particular for electrical conductivity

- These control are not necessary if demineralised water is used

Regular

service water

water

(*)

6-8

7–8

< 10°

< 200

< 25

< 0,5