General Information; Instructions Prior To Installation - De Dietrich MS 24 MI FF Manual Para El Usuario

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The following notes and instructions are addressed to fitters to allow them to carry out trouble-free installation. Instructions
for igniting and using the boiler are contained in the 'Instructions for Users' section.
• This boiler can be connected to any type of double- or single-pipe convector plate, radiator or thermoconvector. Design
the system sections as usual, though, bearing in mind the available flow-head at the plate, as shown in section 25.
• Do not leave any packaging (plastic bags, polystyrene, etc.) within reach of children, as it is a potential source of danger.
• Initial lighting of the boiler must be carried out by an authorised Service Engineer, as indicated on the attached sheet.
Failure to observe the above will render the guarantee null and void.
ADDITIONAL PUMP WARNING
If an additional pump is used on the heating system, position it on the boiler return circuit. This will allow the correct
operation of the water pressure switch.
SOLAR WARNING
if the instantaneous (mixed) boiler is connected to a system with solar panels, the maximum temperature of the domestic
hot water entering the boiler must not exceed 60°C.

13. INSTRUCTIONS PRIOR TO INSTALLATION

This boiler has been designed to heat water to a temperature lower than boiling point at atmospheric pressure.
It must be connected to a central heating system and to a domestic hot water supply system according to its performance
and power output.
Do the following before connecting the boiler:
a) Make sure that the boiler is adjusted to use the type of gas delivered by the gas supply. To do this, check the markings
on the packaging and the rating plate on the appliance.
b) Make sure that the flue terminal draft is appropriate, that the terminal is not obstructed and that no exhaust gases
from other appliances are expelled through the same flue duct, unless the latter has been specially designed to collect
exhaust gas from more than one appliance, in compliance with current laws and regulations.
c) Make sure that, if the boiler is connected to existing flue ducts, these have been thoroughly cleaned as residual products
of combustion may detach from the walls during operation and obstruct the flow of fumes.
To ensure correct operation and maintain the warranty, observe the following precautions:
1.
DHW circuit:
1.1. If the water is harder than 20 °F (1 °F = 10 mg calcium carbonate per litre of water), install a polyphosphate dispenser
or an equivalent treatment system, compliant with current regulations.
1.2. Thoroughly flush the system after installation of the appliance and before use.
1.3. The materials used for the product's DHW circuit comply with Directive 98/83/CE.
2.
Heating circuit
2.1. new system
Before proceeding with installation of the boiler, the system must be cleaned and flushed to eliminate residual
thread-cutting swarf, solder and any solvents, using suitable proprietary products. To avoid damaging metal, plastic
and rubber parts, only use neutral cleaners, i.e. non-acid and non alkaline. Recommended cleaning products are:
SENTINEL X300 or X400 and FERNOX Regenerator for heating circuits. Use these products in strict compliance
with the manufacturers' instructions.
2.2. existing system:
Before installing the boiler, drain the system and clean it to remove sludge and contaminants, using suitable
proprietary products as described in section 2.1.
To avoid damaging metal, plastic and rubber parts, use only neutral cleaners, i.e. non-acid and non-alkaline such
as SENTINEL X100 and FERNOX Protector for heating circuits. Use these products in strict compliance with the
manufacturers' instructions.
Remember that the presence of foreign bodies in the heating system can adversely affect boiler operation (e.g.
overheating and excessive noise of the heat exchanger).
Failure to observe the above will render the warranty null and void.
INSTALLATION INSTRUCTIONS

12. GENERAL INFORMATION

74
71.03982.03 - EN

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