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11
Fig. 12. Functional flow diagram.
M
ains
indicat
o
r
On/Off
swit
ch
ST8
(L
S
)
ST8
(L
R
)
ST8
(N
S
)
ST1
Centr
e
Pin
ST15
Pin L
REL
1
REL
3
Pump
Fan
ST12 Pin N
Optional link
R
oom
thermost
at
Tr
ansf
ormer
Fuse F2 (1.6A
Slow)
Fuse F1
(2A Slow)
N
N
ST12 Pin L
LIVE
IN
gr
een
Electr
onics
Electronics
Electronics
Inputs
Outputs
Spark
Indicat
or
s
Settings
R
egulat
or v
alv
e
CH
demand
indicat
or
Re
d
Spark
electr
odes
DHW
demand
indicat
or
Re
d
Flame
detect
indicat
or
Re
d
M
ain v
alv
e
M
ain v
alv
e
Flow swit
ch
CH sensor
DHW sensor
Air pr
essur
e swit
ch
Flame sense
Ov
erheat cut-off
24V pr
ogr
ammer
Reset button
Gas valve mode switch
CH pressure adjust pot
CH Control knob
DHW control knob
Convert AC to low
voltage electronics
Electronics/
microprocessor
(Safety Low Voltage)
Содержание 28Si
Страница 29: ...29 ...
Страница 56: ...TO REPLACE THE PROGRAMMER Follow the preceding instructions 3 Programmer connection Fig 1 ST5 ...
Страница 57: ...4 OFF TWICE ONCE ON ...