Technical Data
VITOCROSSAL 300, CT3
7
Recommended minimum service clearances
Boiler
Burner
To enable convenient installation and
maintenance, observe the stated clearance
dimensions. Maintain the minimum
clearances where space is tight. In the
delivered condition, the boiler door opens to
the right. You can relocate the hinge bolts
so that the door can open to the left.
Mechanical room
H
Do not operate when air is polluted with
halogenated hydrocarbons (e.g. as in
aerosols, paints, solvents and cleaning
agents)
H
Prevent very dusty conditions
H
Prevent high levels of humidity
H
Prevent freezing and ensure good
ventilation
Boiler model
CT3-
17
22
28
37
46
57
72
89
v
w
x
y
z
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
28
711
62¾
1 593
36½
930
40
1012
41¼
1048
28
711
65¾
1 671
39¼
1 000
40
1 012
41¼
1048
28
711
69
1 752
43¼
1 100
40
1 012
41¼
1048
35
889
72
1 828
59
1 500
44½
1128
45¼
1149
35
889
75
1 906
59
1 500
44½
1128
45¼
1149
39
991
81¼
2 062
59
1 500
44½
1128
45¼
1149
45
1143
85½
2172
59
1500
49
1243
48
1219
45
1143
93¼
2366
59
1500
49
1243
48
1219
M
inimum clearances to combustibles
Boiler model
CT3-
17
22
28
37
46
57
72
89
Top
6” / 150 mm
Sides
6” / 150 mm
Flue
As per vent manufacturer’s specifications
Front
6” / 150 mm
Floor
combustible
5
2
8
5
8
7
1
v
1
.9
L
e
n
g
th
o
f
b
u
rn
e
r
y
w
x
v
z
5
0
0
m
m
1
9
¾
”
5
0
0
m
m
1
9
¾
”
2
0
0
m
m
8
”
