Ferroli OPTIMAX 25 S Instructions For Use, Installation And Maintenance page 13

Optimax 25 S
Central heating request
The heat demand can be done by the room thermostat (terminal 4-5) or by a switch line 230 V phase
(terminal 4).
Standard Systems
For a general pipe layout and wiring diagram on the "S" and "Y" plan systems please see fi g.
6a, 6b, and 7a, 7b.
OPTIMAX "S" Plan
Remove
connection
between
terminals 4-5
PROGRAMMER
DHW ON
CH ON
NEUTRAL
zone
valve
DHW
zone
valve
OPTIMAX
FERROLI
BOILER
(mimimum flow of 6l/min.)
Junction Box
5 4 3 2 1
L N E L
Terminal 4 - SWITCH LINE
1 2 3 4 5 6 7 8 9 10
LIVE
BROWN BLUE
CH
GREY ORANGE
Pipe layout
Auto air vent
D.H.W.
Zone Valve
C.H.
Zone Valve
Automatic
bypass
Wiring diagram
Fig. 6a
N
E
L
230 Vac
fused at
3 amps
Room Thermostat
Cylinder Thermostat
Fig. 6b
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