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.
Page 2100-S-3
Installation Instructions
For “400” OVENPAK
®
Burners: Lock screws
should be drawn up hand-tight, then backed out one-
half turn to allow for cone expansion. They must be
re-checked after start-up, and loosened if necessary
to prevent deformation of cone. See start-up instruc-
tions for details. Over-tightening lock screws can
lead to cone distortion and greatly reduce cone
and discharge sleeve life.
Discharge sleeve must be flush with, or extend
beyond, interior wall. Maxon can supply a special 12"
long discharge sleeve, but higher noise levels may
result, particularly when firing on propane.
An external viewing port should be provided for
flame observation, preferably in such a position that
burner pilot and main flame can both be seen.
Flame sensing can be accomplished by either
flame rod or UV scanner. When UV scanner is used,
it should be kept as close to burner as feasible. Heat
block, if used, may affect signal strength with some
brands of scanners.
For “400” OVENPAK
®
Burners, field conversion
from a flame rod version to a UV scanner version and
vice versa may require additional parts in the burner.
Contact Maxon for requirements.
Alternate fuels may require correction of supply
pressures.
If OVENPAK
®
Burner is equipped with Maxon Hi/Lo
Control Motor, low-fire start wiring can be accom-
plished as shown in the sketch below.
Maxon assumes no responsibility for the use or
misuse of the layouts shown. Specific piping
and wiring diagrams should always be submit-
ted to the appropriate agencies for approval on
each application.
Multi-burner installations require special consid-
erations if supplied by a common pipe train and/or air
supply. Air and Gas Balancing Valves should be
used for improved heating uniformity; Gas Swing-
Check Valves should be installed as close as pos-
sible to each burner inlet for dependable lightoff (gas
manifold may otherwise act as a reservoir, preventing
lightoff during trial-for-ignition period).
Control system’s circuitry must not allow main
Fuel Shut-Off Valve to be opened unless combustion
air is on, and must de-energize valve upon loss of
combustion air pressure, along with the other usual
system interlocks. Motor starter is to be interlocked
with valve, whether or not a combustion air pressure
switch is used.
4/98
“400”, “200” OVENPAK
®
Burners
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