Viessmann Vitocrossal 300 CT3 Series Installation Instructions Manual page 10

Set-up
Minimum Clearances
Legend
V Vent pipe connection
SH Female connection R½ in. for air vent and pressure
gage
D Drain
CD Condensate drain
BR 1 Boiler return 1
BR 2 Boiler return 2
BTS Boiler temperature sensor
BD Boiler door with burner connecting flange
BS Boiler supply
IO Inspection opening
SS Safety supply for pressure relief valve
OP Observation port (boiler from CT3-17 - 28:
offset by 90º )
IN Insulation
10
(continued)
Overall length
Length
SH
OP
BD
min. 5b in.
*1
(140 mm)
IO
CD
Vitocrossal 300, CT3 Series Installation
BS
SS
Length of 12 in.
boiler pad (160 mm)
Note: - Boiler shell, overall and foundation dimensions
listed on page 29.
- Minimum shipping dimensions: use "o" in the
table below, and height, width 1 in the diagram
above.
*1 The minimum combustion head length of 5½ in.
(140 mm) must be maintained. When a burner with
a shorter combustion head is used, all functions
including combustion results must be verified. The
maximum combustion head length must also be
observed so that the burner on the hinged combustion
chamber door can swing into service position. Radius
of door hinge to outside combustion head: 18¾ in.
(476 mm).
Overall width
Width 1
with IN 1
BTS
Width 1
BR2
BR1
D
V
Width 2
Width 2
with IN 2