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INSTALLATION
mini HE --- Installation & Servicing
27
32 FUNCTIONAL FLOW DIAGRAM
mini HE C24, mini HE C28, mini HE C32
L
N
Electronic
control pcb
Fan
Air pressure switch
CH flow
switch
DHW flow
switch
Pump
DHW temp.rd
bkbk bu
CH temp.
38
37
31
30
bu
bu
rd
10
9
bu
bn
Three way
6
8
bk
bu
7
div. valvebn
wh
33342829
Gas Valve
gy
36
35
ye
(modulation coil)
23
25
13
14
gy
gy
bu
bk
bn
bu
Safety
thermostat
Gas Valve
(on---off operators)
11
12
20
27
wh
bk
rd
32
Flue
temperature
Ignition
electrodes
Detection
electrode
151639
Condensate
trap
probe NTC
probe NTC
26
bk
19
wh
2
1
probe NTC
INSTALLATION