C 6. Changing Gas Type (If Required) - Viessmann Vitocrossal 300 Service Instructions Manual

Further details regarding the individual steps
Changing the gas type
B
C
A
E
D
C
F
1. Remove the burner hood.
2. Release two screws and remove
gas restrictor retainer A from gas
combination valve B.
3. Push gas restrictor C out of the
side of gas restrictor retainer A.
Gas restrictor summary
Boiler Rated output range
*1
for (kW)
ID F
Natural
gas E Gas restrictor
ID F
Natural
gas LL Gas restrictor
*1
Relative to T /T
V R
(if required)
50/30 ºC (see specification).
Initial start−up, inspection and maintenance
4. ¨ Safety instructions
Insert O−ring D into the groove of
new gas restrictor C.
5. Push new gas restrictor C for the
prevailing gas type into gas
restrictor retainer A (click into
place).
6. ¨ Safety instructions
Check whether O−ring is inserted
into gas restrictor retainer A.
Insert gas restrictor retainer A
into gas combination valve B and
secure with screws.
7. Remove the self−adhesive label for
the gas type from the type
description supplied, and affix
over existing label E on gas
restrictor retainer A.
¨ Safety instructions
Check all gas connections for
leaks.
8. Affix label ("Adjusted for ...")
showing the current gas type over
existing label ("Adjusted for ...")
on the burner control unit
mounting plate.
9 27
E 24
LL 24
(cont.)
12 35 16 49
E 32 E 44
LL 32 LL 44
22 66
E 60
LL 60
9