m
CORPORATION
MUNCIE, INDIANA, USA
INDUSTRIAL COMBUSTION EQUIPMENT AND VALVES
Maxon practices a policy of continuous product improvement. It reserves the right to alter specifications without prior notice.
Determine your differential air pressure reading
by taking an additional reading with manometer
connected between the burner’s air pressure test
port and atmosphere with the burner at high fire
position, fuel valves closed, and all air handling
systems running. Subtract the combustion
chamber static pressure obtained above from this
air pressure reading to give you differential air
pressure reading.
For Model “200” OVENPAK
®
Burner only
(steps 6A-6C)
6A. Cross-connect manometer to upstream ① and
downstream ② air pressure test connections on
Model “200” OVENPAK
®
Burner’s main housing.
6B. Start air handling system and adjust louvers,
dampers, etc. to desired setting to establish cold
suction design conditions.
6C. Transfer manometer connection from upstream
air pressure test ① to gas pressure test connection
③. This is the differential air pressure reading for a
Model “200” OVENPAK
®
Burner.
For “400” OVENPAK
®
Burners: The differential air
pressure setting determines the burner’s capacity and
performance capabilities. Model EB and MA manual
air OVENPAK
®
Burners, with their external air control
valve(s), provide for the manual setting of this differ-
ential air pressure to the burner. Refer to specific
adjusting procedures relating to MICRO-RATIO
®
and
control valve adjustment in Maxon product line
catalog. MA OVENPAK
®
Burners have an external
locknut adjustment on the end of the air butterfly
control valve. This lets you limit and set the differential
pressure to the OVENPAK
®
Burner. Refer to Maxon
specification tables in the catalog for the differential
air settings required for your specific OVENPAK
®
Burner capacity.
7. Determine the required differential gas pres-
sure using this differential air pressure reading
obtained from step 6. If your combustion chamber
does not have a static pressure test connection,
then you must measure combustion chamber
static pressure by connecting a manometer
between the gas pressure test port on the
burner’s backplate and to atmosphere with the
burner at low fire position, fuel valves closed, and
all air handling systems running. High fire pres-
sures are provided in Maxon product line catalog
literature and/or read data stamped into burner
nameplate.
8. Verify that spark ignitor is properly positioned
and lines up with the appropriate dimensions
required for your specific burner. (Refer to appro-
priate Maxon catalog specification table.) Check
that spark ignitor arcs at the end of your properly
positioned ignitor.
9. Return burner control valve (or crank) to low
fire position when purge of system is complete.
10. Open main and pilot gas cocks, then attempt
spark ignition to light pilot while slowly turning
pilot gas regulator spring clockwise and/or
adjustable orifice screw counter-clockwise to
increase fuel flow. Repeat procedure as neces-
sary until pilot ignites as air might have to be bled
out of fuel supply lines before reliable pilot flame
is established. Pilot gas regulator should normally
be set for as low a pressure as possible, using
fuller opening of pilot gas adjustable orifice (if
used).
11. After ignition, adjust pilot flame for good stable
flame shape. A rule of thumb is that any pilot over
a tennis ball size is probably too large. This
assumes you have visual access to the pilot
flame. If this is not possible, then adjust pilot to
give the strongest and most stable flame signal
through your flame safety circuit. This signal
strength can be read with a micro-amp meter. The
signal strength (or range) will be determined by
the specific type of flame safeguard instrument
you have with your burner system.
Page 2100-S-5
Start-Up Instructions
“400”, “200” OVENPAK
®
Burner
4/98
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