6
INTRODUCTION
4.1
System layout
Condexa PRO NA 75 P
4
3
24
23
22
17
5
6
10
16
2
1
4
5
6
7
8
10
9
26
25
24
23
22
21
20
19
16
15
11
12
13 14
3
18
17
1
Flue gas exhaust connection
2
Exhaust flue temperature sensor
3
Gas valve
4
Fan
5
Combustion chamber
6
PCB (printed control board)
7
Flue check valve
8
Drain cock
9
LWCO/Minimum Water Pressure Switch (set to 7 psi/0.5
bar)
10
Pump with integrated check valve
11
Power switch
12
Central heating return
13
Gas supply
14
Central heating supply
15
Condensate drain connection
16
Flow-meter
17
Intake pressure for flue gas pressure switch
18
Return temperature sensor
19
Flue gas pressure switch
20
Control panel
21
Ignition/detection electrode
22
Safety Water High-limit Thermostat with manual reset
by PCB
23
Supply temperature sensor
24
Automatic air vent
25
Spark generator
26
Casing
