Gas Valve (Lpg) - Viessmann Vitocrossal 200 CM2 186 Service Instruction

Vitocrossal 200 CM2 186 to 311 Service
Gas Valve (for LPG)
1. Remove the screw and disconnect the electrical plug
(black) from the gas valve.
2. Remove the screw and disconnect the electrical plug
(white marked GDW2) from the gas pressure switch.
3. Remove the screw and disconnect the electrical plug
(white) from the gas pressure switch.
4. Remove the four M5 (4 mm hex key) screws from the
lower gas valve flange and set aside.
5. Disconnect gas supply line.
6. Disconnect compensation tubing from gas valve.
7. Remove tube support from gas valve and set aside.
8. Remove four M5 (8 mm hex) nuts from the gas
manifold and set aside.
9. Remove LPG orifice and set aside.
10. Remove both LPG gaskets and replace.
Note: Clean surface area of manifold and replace
gasket.
11.Replace gas valve.
Note: Install M5 studs to gas valve to reconnect the
manifold and torque to 17 lb.in (2 Nm).
12.Reinstall in reverse order.
Note: Torque the M5 (4 mm hex) screws to 132 lb.in
(15 Nm).
Note: Torque the M5 (8 mm hex) nuts to 17 lb.in
(2 Nm).
WARNING
Gas leakage may lead to explosion. Leak test the
reconnected gas line and gas valve connections.
CAUTION
Usage of leak detection spray may lead to malfunction.
Avoid contact between leak detection spray and
electric contacts.
Burner Service
33