1.1
1.2
A
B
1.1
Remove 3 screws (A) and cover (B) from
control box.
Clipped inside the cover is a plastic tool
used to change the mode switch setting.
Re-connect mains electrical supply.
1.2
Using the tool set the mode switch to
maximum.
Ensure the boiler is powered up and
there is a demand from the external
controls.
The power indicator will flash and the boiler
will stay in this mode for 15 minutes if no
further change is made to the switch.
MAX
NORM
MIN
THE BOILER IS FACTORY SET. ADJUSTMENT
OF AIR / GAS RATIO IS ONLY REQUIRED IF
STATED IN THE SERVICING OR REPLACEMENT
PARTS SECTION OF THE MAIN INSTRUCTIONS
SETTING THE AIR / GAS RATIO
I S O L ATE MAI N S E LE C TR IC AL
S U P P LY AN D R E M OVE O UTE R
C AS E AS S H OWN I N TH E
INSTALLATION, COMMISSIONING &
SERVICING INSTRUCTIONS
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR Ri
8 716 115 168a (06/2008)
38
SETTING THE AIR/GAS RATIO
S
E
RV
ICI
N
G
& S
P
AR
E
S
