Bedienungsanleitung Ygnis Varino (Seite 20 von 33) (Englisch)

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PYROGAS VARINO 65 - 300

We reserve the right to make changes to dimensions and construction 18 Edition 02.09.2015

6.10. Flue gas installation

The pertinent rules of technology as well as the country-specific regulations and valid standards must be

observed.

6.10.1. Requirements

Flue gas installations must be corrosion-resistant, leak-tight in terms of gas and condensate and withstand the

static and operating requirements. The flue mouth must ensure unhindered emergence of the flue gases (a flue

cap is not recommended).

The right choice of the diameters of the flue gas installation will depend on the height of the installation, the

number of elbows to be applied and other factors. The necessary calculations for the dimensioning of the

installation shall be carried out by the manufacturer of the installation who shall ensure that the boundary

conditions related to the available delivery pressure will be in accordance with chapter 4.5 in those cases where

the installation is planned to be operated with a positive back-pressure (appliance type B23P).

Attention: Appliance type B23P is only valid when the appliance is installed with flue systems meeting the norm

EN1856-1 with CE-marking and classified as P (overpressure).

6.10.2. Execution

The condensing unit is to be placed as near as possible to the flue. The connection between the condensing unit

and the flue must be designed with a gradient so that the condensate which is produced can flow from the flue

gas tube into the condensate trough of the boiler. This connection should not contain many bends nor cross-

sectional changes. The connection of the flue gas installation to the boiler must ensure leak-tightness with regard

to gas and condensate. A standard commercial coupling (e.g. Straub coupling) is best suited for this purpose.

The flue gas installation does not have to be provided with it's own condensate drain pipe. The condensate outlet

on the PYROGAS VARINO is dimensioned large enough so that condensate and rain water can be disposed of.

If the flue gas line is made out of material which is not temperature-resistant a safety temperature limiting device

is to be fitted in the flue gas line. This can be delivered completely assembled as an option or supplied by the

flue constructor (regulating thermostats are inadmissible). In the latter case, the potential-free contact must be

connected to the terminals of the boiler control whereby a safe disconnection of the burner is ensured if the

temperature is exceeded (external safety).

It is recommended to ground plastic flue gas lines, since these become statically charged during operation.

6.10.3. Measurement connections for firing control

Measurement connections in accordance with the official regulations must be provided for flue gas, temperature

and pressure measurements in the flue gas tube (supply by flue constructor).

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