Operating Principle; Control Panel - REMEHA W40 Installation And Maintenance Instructions Manual

6.2 Operating principle

The appliance is equipped with a closed air box. Via a
fan, air is drawn in. On the intake side of the fan, an inta-
ke unit has been mounted where the gas is injected.
Depending on the settings and the ambient tempera-
tures measured by the temperature sensors, the fan
speed is regulated. The gas/air ratio control adjusts the
quantity of gas to the quantity of air.
The gas/air mixture is achieved in the fan, and then
transported to the burner.
Following combustion, the hot flue gases are conducted
via the aluminium heat exchanger. At the heat exchan-
ger, the flue gases give off heat to the central heating
water in the heat exchanger. The water vapour in the flue
gases condenses against the finned pipes at the base.
The heat released during this condensation process (the
so-called latent or condensation heat) is also transferred
to the central heating water.
The condensed water thus formed is discharged via a
siphon at the base of the heat exchanger.
a
b
d e
f
Fig. 07 Control panel
i
c
g h

6.3 Control panel

The remeha W40/60-m ECO is equipped with an
advanced control system comprising:
a. an automatic microprocessor control system
b. a control panel with setting keys and read-out display.
Various values can be set and read, using the setting
keyboard and read-out displays.
The two levels for setting and read-out are:
- user level - free access
- service level - access by service code.
The control panel accommodates the following compo-
nents (fig. 07) :
a. 'code'-display
display of: - operating mode 1 digit
- setting mode
- read-out mode
in service level:
- speed mode
- failure mode
b. temperature display (
display of: - temperatures
- settings
- malfunctions
c. 'reset'-key:
- to reset after a malfunction
d. 'mode'-key:
- key to select the required mode
e. 'step'-key:
- key to select the required program within the
selected mode
f. 'store'-key:
- key to save the settings
g. ' '-key
- to select a higher setting
h. ' '-key:
- to select a lower setting
i. burner switch:
- to switch the boiler on/off.
10
remeha W40/60-m ECO
1. digit and dot
1. digit and blinking dot
half digits
1 blinking digit
)