Conversion To Liquid Propane Gas (Lpg) - Viessmann Vitocrossal 200 CM2 400 Service Instructions Manual

Vitocrossal 200, CM2 400, 500, 620 and 620 TX Service
Steps – Commissioning, Inspection and Maintenance
Commissioning, Inspection, Maintenance
(continued)

Conversion to liquid propane gas (LPG)

(The LPG conversion kit is supplied with the burner)
1. Close the gas shut-off valve.
2. Switch OFF the system ON/OFF switch at the boiler
control unit.
3. Switch OFF the main boiler circuit breaker outside
the boiler room or the power supply and prevent
unauthorized reconnection.
4. Remove boiler front cover (see page 10).
5. Undo gas supply fitting A
6. Disconnect compensation tubing G connected
between the venturi tube and the gas valve.
7. Remove four M5 hex nuts (8 mm wrench).
Detach the gas valve from flange E.
8. Place O-ring B on the gas valve. Install
rubberized cork gasket D onto the gas valve flange.
Install the LPG orifice C.
Note: Chamfer on LPG orifice must face gas valve.
9. Torque screws diagonally with 13.2 lb/in (1.5 Nm).
WARNING
Install LPG orifice. Incorrect installation of the orifice will
lead to leakage.
10. Secure and tighten gas supply fitting A.
11. Reconnect the compensation tubing G (connected
between the venturi tube and the gas valve).
12.Apply:
- Partial rating plate above CSA rating plate located
on top panel (behind the boiler control).
- Label indicating that this unit is equipped for LPG
over the NG label located on the gas valve.
- Label indicating that this unit has been converted from
NG to LPG next to the CSA rating plate (on the top
panel).
- Fill out and fax conversion report.
13.Check all gas fittings for leaks.
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