T
T
a
a
b
b
l
l
e
e
7
7
C
C
o
o
m
m
p
p
o
o
n
n
e
e
n
n
t
t
L
L
i
i
s
s
t
t
Pos. Description
1 Heat
exchanger
2
Hot tap water boiler
3 Pump
4 Three-way
valve
5
Three-way valve internal parts
6 Incandescent
igniter
7 Ionization
pin
8 Burner
9 Condensation
tray
10 Gas
valve
11 Fan
12 Venturi
tube
13
Water pressure sensor
14 Supply
sensor
15 Return
sensor
16 Safety
device
17 Bleed
valve
18
Hot water sensor
19
Exhaust gas sensor
20 Type
plate
21
Condensation drain/high pressure protection
22 Gas
23
Central Heating Return
24
Central Heating Flow
25
Hot water outlet
26 Cold
water
inlet
27
Flow to Hot Water Cylinder
28
Return from Hot Water Cylinder
EC 25 Compact Technical Manual page
13