Bedienungsanleitung Remeha Gas 220 Ace (Seite 18 von 92) (Englisch)

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4 Description of the product

The Gas 220 Ace boiler is delivered with a combination of the control

panel, control unit and extension PCB. The contents of this manual are

based on the following software and navigation information:

Tab.9 Software and navigation information

Name visible in display Software version

Boiler Gas 220 Ace FSB-WHB-HE-150-300 01.07

Control panel HMI S-control HMI 02.01

PCB SCB-01 SCB-01 00.02

4.1 Operating principle

4.1.1 Gas/air regulation

The boiler is equipped with a casing that also serves as an air box. The

fan draws in the combustion air. The gas is injected into the venturi and

mixed with the combustion air. The fan speed is controlled on the basis of

the settings, the heat demand and the prevailing temperatures measured

by the temperature sensors. The gas/air ratio control ensures an accurate

mixture of the required amounts of gas and air. This provides optimum

combustion over the entire heat input range. The gas/air mixture goes to

the burner, where it is ignited by the ignition electrode.

Important

The combustion air supply is checked before each burner start,

and at least once every 24 hours. During continuous operation

(e.g. supplying process water), please note that the boiler control

will reset every 24 hours.

4.1.2 Combustion

The burner heats the central heating water flowing through the heat

exchanger. If the temperature of the flue gases is lower than the dew point

(approx. 55°C), the water vapour condenses in the heat exchanger. The

heat released during this condensation process (referred to as the latent

or condensation heat) is also transferred to the central heating water. The

cooled flue gases are discharged through the flue gas discharge pipe. The

condensed water is discharged through a siphon.

4.1.3 Control system

The e-Smart electronic control system ensures that your heating system is

smart and reliable. This means that the boiler responds practically to

negative environmental influences (such as limited water flow and air flow

problems). In the event of such influences, the boiler will not go into

lockout mode, but in the first instance will modulate back. Depending on

the nature of the circumstances, a warning, blocking or lock-out may

occur. The boiler continues to supply heat provided the situation is not

dangerous. With this control system, your boiler is also equipped for

remote control and monitoring.

4.1.4 Control

On/off control

The heat input varies between the minimum and the maximum values

on the basis of the flow temperature set on the boiler. It is possible to

connect a 2-wire on/off thermostat or a power stealing thermostat to the

boiler.

Modulating control

The heat input varies between the minimum and the maximum values

on the basis of the flow temperature determined by the modulating

4 Description of the product

18 7665063 - v.05 - 18102018

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