Instruction Manual
21
3.9.2 Vertical outlet of air- flue gas system through the roof
Table 3.8.2.1
Type of boiler
Coaxial system Ø60/Ø100
X BOILER BD 23
Maximum length of chimney flue
L
max
= 15 m
X BOILER BD 38
Maximum length of chimney flue
L
max
= 12 m
Coaxial system Ø80/Ø125
X BOILER BD 23
Maximum length of chimney flue
L
max
= 25 m
X BOILER BD 38
Maximum length of chimney flue
L
max
= 20 m
3.9.3 Reduction of the maximum length of the air-flue system by changing the flow direction
Type of Fitting
15º
45º
90º
0.25m
0.5m
1m
3.10 CONNECTION OF ADDITIONAL DEVICES
Access to the electrical terminals of the controller can be found at the back of the controller, under the two flaps.
To connect an additional device, unscrew the appropriate flap, put the cable through the bushing in the flap and connect
the ends of the wire to the correct terminals.
Fig 3.9.1. Electrical terminals at the back of the controller
RT – room temperature controller
OUTDOOR-SENSOR – outdoor temperature
sensor
OT –OpenTherm regulator
0-10V - control signal in the range of 0 do 10V
TANK-SENSOR – tank temperature sensor
TANK-TIMER- tank time regulator
