Co Limiter For Vitocrossal 300, Type Cm3 - Viessmann VITOCROSSAL 200 Type CM2 Technical Manual

Installation accessories
For two-boiler systems up to 1260 kW with Vitocrossal 300, type CT3U
B
A
E
C
D
A Flow manifold
B Mating flanges with gaskets

CO limiter for Vitocrossal 300, type CM3

Part no. 7499 330
A monitoring device that safely shuts down the boiler in the event of
carbon monoxide being released.
Wall mounting in the ceiling area near the boiler.
Can be used for boilers built from 2004 onwards.
Components:
■ Casing with integrated CO sensor, relay and displays for operation
and alarm.
■ Fixing materials.
■ Power cable (2.0 m long).
■ Connecting cable – relay for burner shutdown (2.0 m long).
7
7 0
VIESMANN
18
(cont.)
E
D
B
C Return collector
D Motorised butterfly valves
E Boiler return connector 2
Dim. a: 1550 mm
Rated heating output in kW
Single boiler Two-boiler system
400 800
500 1000
630 1260
Note
If using hydraulic system pipework part no. Z006 033, seal the second
return connectors E with blank flanges.
If the second return connectors E are used on site, install butterfly
valves D to the flow connectors.
Specification
Rated voltage
Rated frequency
Power consumption
Rated breaking capacity of the relay out-
put
Alarm threshold
Safety category
IP rating
Permissible ambient temperature
Nominal diameter
DN 100/125
230 V~
50 Hz
3.5 W
8 A 230 V~
40 ppm CO
II
IP 20 to EN 60529; ensure
through design/installation
70 °C
Gas condensing boilers