Making The Safety Connections; Flue Gas Connection; Connections On The Flue Gas Side - Viessmann Vitocrossal 100 Installation Instructions For Contractors

Connections on the heating water side

Making the safety connections

Safety equipment block installation instructions
1. Install the safety lines.
Min. cross-sections:
Safety valve inlet connection
3 and 4 bar (0.3/0.4 MPa): Up to
160 kW
3 and 4 bar (0.3/0.4 MPa): From
200 kW
6 bar (0.6 MPa)
Safety valve discharge pipe
3 and 4 bar (0.3/0.4 MPa): Up to
160 kW
3 and 4 bar (0.3/0.4 MPa): From
200 kW
6 bar (0.6 MPa)
!
Please note
Connections subject to mechanical load can
cause appliance damage.
Connect the pipework free of load and tor-
que stress.

Flue gas connection

Only carry out commissioning when the following
conditions have been met:
Unrestricted flow in the flue gas routes.
■
Positive pressure flue system is gas-tight.
■
■ Inspection port covers checked for secure and tight
seating.
■ Apertures for supplying sufficient combustion air are
open and cannot be closed.
All current regulations on installing and commission-
■
ing flue systems have been observed.

Connections on the flue gas side

Note
Ensure the flue gas connection is free of load and tor-
que stress.
Flue system installation instructions
Flue gas connection:
(cont.)
2. Check the connections on the heating water side
for leaks.
Permiss. operating pres-
sure
Min. operating pressure
Test pressure
R 1
Low water indicator (water level limiter)
R 1
¼
Tests have verified that the requirements to EN 12828
R 1 are met. This makes an additional low water indicator
unnecessary.
R 1
¼
Safety valve
R 1
½
Equip the boilers with a safety valve. Only use safety
valves that are type-tested to TRD 721 and are desig-
R 1
nated in accordance with the system version.
¼
Danger
Leaking or blocked flue systems, or an inade-
quate supply of combustion air can cause life
threatening poisoning from carbon monoxide in
the flue gas.
Ensure the flue system is in good working order.
Vents for supplying combustion air must be non-
closable.
!
Please note
Balanced or standard flues must not come
loose.
Use floor or wall mounted fixing clamps (bal-
anced flue system accessories) to secure the
pipes in place.
Connect the flue outlet to the flue with the shortest
200 mm
7
possible run, maintaining a slight rise (min. 3°). Avoid
sharp kinks.
6 bar (0.6 MPa)
0.5 bar (0.05 MPa)
7.8 bar (0.78 MPa)
37