10
3
3.3 Basic construction and variations
1
Flue gas outlet DN80
2
Air inlet DN125
3
View port with integrated mirror
4
Pressure gauge
5
LCD display
6
Dial knob
7
Enter key
8
Water pressure switch
9
Reset key
0
On/off switch
q
PC connection
(Software accessory WCM diagnostic)
w
Electrical installation area
e
Electrical installation duct
r
Heating return Ø 28 mm
t
Condensate outlet (for connection of siphon
included in delivery)
z
PWM pump (version H only)
u
Heating flow Ø 28 mm
i
Gas pipe Ø 22 mm
o
Flue gas sensor (NTC 5k
Ω
)
p
Inspection opening heat exchanger
a
Air intake damper (only on WTC 45-A)
s
Heat exchanger made of AlMgSi
d
Flow temperature sensor (NTC 5k
Ω
)
f
Fan
g
Gas mixture preparation
h
Safety temperature sensor STL (NTC 5k
Ω
)
j
Ignition electrode
k
SCOT electrode
l
Temperature switch heat exchanger
(with manual reset)
ö
Burner cover
y
Automatic de-aerator
x
Ignition unit
3.3.1 Components
1
2
3
4
5
6
7
8
9
0
q
w
e
r
t
z
u
i
o
d
f
g
h
x
k
ö
y
p
a
s
j
l
Summary of Contents for WTC 45-A
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