46
GAS-FIRED BOILER Boiler Manual
PART 8: GAS PIPING (CONTINUED)
D. DUNGS GAS VALVE FOR T50/T80/80M/140M/199M
OFF SET ADJUSTMENT
CAUTION: DO NOT REMOVE
THIS SCREW OR ATTEMPT TO
MAKE ANY ADJUSTMENT TO
THIS SCREW WITHOUT A
COMBUSTION ANALYZER
SEE PART 12 SECTION "D"
FOR COMBUSTION SETTING
TABLE.
PRESSURE TAP OUTLET
THROTTLE ADJUSTER
NOTE: IF FOR ANY REASON THE
THROTTLE NEEDS TO BE ADJUSTED,
IT IS VERY IMPORTANT THAT A
"COMBUSTION ANALYZER" BE USED
TO ENSURE SAFE AND PROPER
OPERATION. TURN THE ADJUSTER
TO THE (+) TO INCREASE GAS OR
THE (-) TO DECREASE THE GAS
SUPPLY. THIS ADJUSTMENT COULD
AFFECT CO/CO% LEVELS. MAKE
SURE THE LEVELS CORRESPOND
TO THE CHART IN COMBUSTION
GAS SHUT OFF
VALVE
PRESSURE
TAP INLET
GAS VALVE
SETTINGS. SEE PART 12 FIGURE 12-1
Fig. 8-2
service to an area to provide maintenance to their
lines. This gas valve must not be replaced with a
conventional gas valve under any circumstances.
As an additional safety feature, this gas valve has
a flanged connection to the swirl plate and blower.
WARNING