Vaillant ecoTEC VU Manuel de service télécharger pdf (Page 68)

Glossary

68 ecoTEC plus installation and maintenance instructions 0020134823_01

19 Glossary

Burner anti-cycling time

The burner is electronically locked for a specific time after

each time it is switched off ("restart interlock") to avoid fre-

quent switching on and off of the burner (energy losses)

and to extend the working life of the boiler. The burner anti-

cycling time is only activated for the heating mode. Hot

water handling is not affected if burner anti-cycling time is

running.

Calorific value

Unlike the heating value, the calorific value of a fuel

describes the total useable heat during combustion, based

on the quantity of fuel used, including the condensation

heat in the steam.

The energy contained in steam can also be used if the

steam liquefies on cooling.

Condensing technology

Technology which uses the calorific value of the fuel that is

used. To do this, the flue gases are cooled below the dew

point of the flue gas so that the steam they contain con-

denses. The condensation heat that this releases can also

be used.

In particular, the flue gas losses are greatly reduced. The

losses from conduction of heat and radiation are also

reduced by the lower system temperatures. The entire heat-

ing installation should therefore be designed for low system

temperatures (flow/return temperature) for the effective

use of the calorific value. The level of efficiency attainable

for boilers is always given based on the heating value of the

gas. Due to the additional condensation heat used, the cal-

culated values can exceed 100 %.

Dew point

The dew point is the temperature at which steam turns to

liquid (condensation). The steam in the flue gas from the

boiler contains thermal energy, which can be released by

condensation. In gas-fired and oil-fired boilers using calo-

rific values, the flue gases are cooled so that the steam

condenses and the heat that it contains can be output into

the heating system.

Digital information and analysis system (DIA)

The Vaillant ecoTEC plus boiler is fitted with a digital infor-

mation and analysis system (DIA). If additional settings are

required, which have not been configured using the installa-

tion assistant, you can view and modify further parameters

using the DIA.

eBUS

eBUS is an abbreviation for energyBUS. The eBUS is a spe-

cial bus used in heating technology, which assists the com-

munication between intelligent components in the heating

technology. In a Vaillant system, up to eight different heat

generators can be connected via the eBUS. The eBUS com-

munications protocol simplifies the control-related linking

of different system components within a heating installa-

tion. It provides particular flexibility for retro-fitting and

expanding the system. This simplifies the installation of

boiler cascades or the subsequent addition of components

such as solar hot water generation. The eBUS provides

extended possibilities for connecting controllers and also

for connecting to the vrnetDIALOG Internet communica-

tions system for remote servicing and diagnosis.

Flue pipe

A flue pipe is a line system with two separate flow channels.

The flue gas is routed into separate chambers at the same

time as the required combustion air is pumped to the boiler.

The flue pipe can be designed as a concentric or adjacent

double flue gas pipe (the flue gas channel is sealed from

the air channel). Floor-standing boilers and gas-fired wall-

hung boilers can be operated as room-sealed through the

flue pipe. As a result, boilers can be installed in new build-

ings that, due to their airtight construction, do not offer

sufficient combustion air for open-flued heat generators.

Gas-air mixture unit

The gas-air mixture unit is an assembly in Vaillant condens-

ing units, which consists of the following four main compo-

nents in the ecoTEC plus: Speed-regulated fan, gas valve,

gas supply (mixture pipe) to the premix burner and premix

burner

Multi-functional module

The multi-functional module is an accessory that controls

additional functions or components in combination with

Vaillant boilers with eBUS electronics. It also allows you to

select and control 2 in 7 functions, e.g. circulation pump,

external heating pump, external solenoid valve or response

from the flue non-return flap.

vrnetDIALOG Internet communication system

Using the vrnetDIALOG Internet communication system for

remote setting and monitoring, you can set the heating

installation at the customer's home from your home PC.

Sono journey is required.

vrnetDIALOG can also forward fault messages by fax, E-mail

or SMS to you and thereby help with diagnostics. You can

therefore prepare your work in advance and, if required,

arrive at the customer's home with the right spare parts for

maintenance or repair.

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Vaillant ecoTEC VU Manuel de service Page 68

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