Viessmann Vitocrossal 200 Service Instructions For Contractors page 13

Converting to natural gas LL
Conversion for 115 to 311 kW
F G
A BCD E
Fig. 4
Commissioning, inspection, maintenance
(cont.)
01. Close the gas shut-off valve.
02. Switch OFF the system ON/OFF switch on the
control unit.
03. Switch OFF the mains isolator (outside the instal-
lation room) or isolate the mains power and
secure against unintentional reconnection.
04. Undo fitting .
A
05. Disconnect control cable
06. Release the gas train from flange
07. Remove restrictor
08. Secure the gas train to flange
■ With O-ring
B
■ Without restrictor
Without rubber cork gasket
■
Torque for M 5 nuts: 1.5 Nm
09. Secure fitting
A
10. Plug control cable
11. Check control cables:
■ Correct connection and kink-free routing
Application and seating of retaining clips
■
12. Affix supplied label "Set to ..."
label.
13. Start the burner.
14. Check for gas tightness.
Danger
Escaping gas leads to a risk of explosion.
Check gas routing components for leaks.
!
Please note
The use of leak detection spray can result in
faulty operation.
Leak detection spray must not come into
contact with electrical contacts.
from the gas train.
G
E .
with rubber cork gasket
C
E :
C
D
with a new gasket.
G into the gas train.
F over the existing
.
D
13