Technical data

30
5584 069 - 05
Vitocrossal 200, CM2 400, 500, 620 and 620 TX Installation
Gas Connections
The gas line on the burner meets the requirements
of ASME/CSD-1.
Note: For ease during burner maintenance, route the gas
supply pipe from the opposite side of the burner
hinges (otherwise the panel cannot be removed
when swinging burner left or right). See page 13.
1. Connect gas pipe A to the gas valve.
Gas connection:
Boiler models 400, 500, 620 and 620 TX: 1¼ in. NPT
2. The inlet gas connection flange kit is included with
the burner (field mounted). The flange kit provides
an inlet connection for the gas valve. The flange kit
consists of:
- Gas valve flange D with measurement port F
- O-ring C
- Screws E (x4)
3. Test leak tightness of gas pipe connection.
5. Purge gas line in a safe manner using an approved purge
burner.
WARNING
If test pressure is too high burner and gas fittings
may get damaged.
WARNING
Escaped gas may lead to explosion, which could
cause severe injuries. Do not vent gas pipe above
combustion chamber of boiler.
Legend
A O-ring groove
B O-ring
C Gas valve flange
D Mounting bolts
E Pressure measurement port
CAUTION
If gas pipe contains dirt it is recommended to install
a gas filter into the gas pipe.
Gas valve flange installation
1. Make sure the O-ring surfaces B are clean.
2. Apply a moderate amount of good quality pipe dope,
resistant to the action of liquid propane gas (LPG) on
the gas threads.
3. Screw the flange into the pipe.
4. Using general purpose lithium grease, grease the
O-ring C provided with the flange kit and install
at the inlet of the valve.
5. Tighten the nuts to secure the flange D to the valve
body. Torque screws E to 30 in/lb (3.5 Nm).
Boiler