12
5790 733 - 07
Vitocrossal 300 CA3 Series 2.5 to 6.0 Installation/Service
Recommended
Minimum Service Clearances
Preinstallation
Mechanical room
Avoid air contamination by halogenated hydrocarbons
(e.g. as in sprays, paints, solvents and cleaning agents)
Avoid very dusty conditions
Avoid high levels of humidity
Protect against frost and ensure good ventilation,
otherwise the system may suffer faults and damage.
In rooms where air contamination from halogenated
hydrocarbons is to be expected, operate the boiler
using only direct vent (sealed combustion) operation
only.
Legend
A
Boiler
*
1
Clearance for vent pipe installation.
B
Boiler combustion air intake vent
To enable convenient installation and maintenance,
observe the stated clearance dimensions. Maintain the
minimum clearances where space is tight.
CA3
Model
2.5
3.0
3.5
4.0
5.0
6.0
a
in.
(mm)
31
b
(800)
31
b
(800)
31
b
(800)
31
b
(800)
31
b
(800)
31
b
(800)
b
*
1
in.
(mm)
30
(760)
30
(760)
30
(760)
30
(760)
30
(760)
30
(760)
c in.
(mm)
39
e
(1000)
39
e
(1000)
39
e
(1000)
39
e
(1000)
39
e
(1000)
39
e
(1000)
Top
clearance
31
b
(800)
31
b
(800)
31
b
(800)
31
b
(800)
31
b
(800)
31
b
(800)
Minimum clearances to combustibles
CA3
Model
2.5
3.0
3.5
4.0
5.0
6.0
Top
0
Sides
0
Flue
per vent manufacturer’s specifications
Front
0
Floor
combustible
CA3 2.5, 3.0, 3.5 and 4.0
CA3 5.0 and 6.0
