7
x
Heat cell with gas burner
Control of the burner output
The controller continuously determines the required inflow tem-
perature corresponding to the configured operating parameters
and passes this value to the firing unit of the burner. The firing
unit calculates the necessary burner output from the target value
and the values of the inflow and return flow temperature probes.
The determined output is passed to the burner fan as a PWM
signal. The burner fan immediately adjusts the gas fan speed and
as such the combustion air flow. The gas controller controls the
gas volume accordingly.
CM434 firing unit
The CM434 gas firing unit controlled by a microprocessor con-
trols and monitors the firing program and the temperature
sensors for the inflow and return temperatures.
Fig. 7-3
Components of the GCU compact - exploded view
(for legend, see tab. 7-1)
1
Ignition electrodes
2
Ionisation electrode
3
Burner flange
4
Burner blower
5
Venturi nozzle
6
Gas connector pipe
7
Gas connection G ½" IG with connected gas hose
8
Safety gas control block
9
Gas valve connection adapter
10
Condensate pipe with overfill protection
11
Flue gas collector
12
Securing stirrup for gas connection line(2x)
13
Supply air manifold
14
Boiler body
15
4x fixing screw(burner blower/burner flange)
16
3x fixing screw (Venturi nozzle)
17
2x O-ring (Venturi nozzle - gas connection line - connection adapt-
er)
18
Seal (burner blower/burner flange)
19
6x fixing screw (burner flange/boiler body)
(7x with GCU compact 524 / 528 (Biv))
20
Burner flange seal
21
Seal for burner surface
22
Burner surface
23
Flue gas collector seal
24
O-ring (burner blower - Venturi nozzle)
25
2x fixing screws (flue gas collector / boiler body)
26
Ignition electrodes seal
27
2x fixing screws (ignition electrodes)
28
Ionisation electrodes seal
29
2x fixing screws (ionisation electrode)
30
2x fixing screw (gas valve connection adapter)
31
Seal (connection adapter/gas valve)
32
Locking plate for gas valve
33
1x fixing screw (locking plate/gas valve connection adapter)
34
Seal (gas hose - safety gas control block)
35
Ignition transformer
Tab. 7-1 Legend for fig. 7-1 to fig. 7-3
Summary of Contents for GCU compact 315
Page 81: ...13 x Notes 13 Notes...
Page 82: ...13 x Notes...
