Grain Systems PNEG-526 - Manual (Page 99)

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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.
CAUTION: Initial adjustment and light-off should
be undertaken only by trained and experienced
personnel familiar with combustion systems,
with control/safety circuitry and with knowledge
of the overall installation. Instructions provided
by the company and/or individuals responsible
for the manufacture and/or overall installation of
complete system incorporating Maxon burners
take precedence over these provided by Maxon.
If Maxon instructions conflict with any codes or
regulations, contact Maxon Corporation before
attempting start-up.
Start-Up Instructions
Read complete instructions before proceeding, and
familiarize yourself with all the system's equipment
components. Verify that your equipment has been
installed in accordance with the original manu-
facturer's current instructions.
Series NP-LE AIRFLO ® Burners
For initial system start-up:
1. Close all burner fuel valves and/or cocks. Make
preliminary adjustments to fuel regulators.
2. Check all electric circuitry. Verify that all safety
devices and interlocks are operable and func-
tioning within their respective settings/ranges.
Be sure all manifolds are tight and that test ports
are plugged if not being used.
3. Check that all duct and chamber dampers are
properly positioned and locked into operating
positions.
4. Start main volume air fan. Check for proper
motor rotation and impeller direction. Verify all
safety interlocks are working. Allow air handling
equipment to run adequate purge of manifold
and combustion chamber plenums. Verify air
volume and velocity across burner element to be
within burner operating specifications.
CAUTION: Do not by-pass control panel timers
typically controlling sequential operations.
5. Disconnect the automatic control motor linkage
from your Maxon Control Valve by loosening the
control motor's connecting rod from the valve's
toggle linkage. Initial start-up adjustment should
only be accomplished during a "manual" control
mode. Manually set and secure control valve in
its "minimum" position.
6/03
6. To light and adjust gas pilot: Pilot gas regulator
should initially be set at 2-5” wc. With pilot gas
solenoid valves closed, open main fuel gas and
pilot gas cock. Energize spark ignitor and open
pilot gas solenoid. Turn adjustable orifice screw
out (counter-clockwise) several turns from its
fully seated position or adjust regulator pressure
when fixed orifice is used. Observe pilot ignition
through a sight port and/or by viewing micro-amp
signal metered from flame safeguard relay circuit.
Refine pilot setting for a hard blue flame (and/or
strongest micro-amp signal) by adjusting gas
flow through pilot orifice and/or pilot regulator.
7. Prepare to ignite main burner by adjusting main
gas regulator to approximately midpoint of its
adjustment range. Linkage arrangement for the
use of Series "CV" Gas Control Valve is illus-
trated above for a typical control motor. Arrange
accordingly.
8. With control valve at "minimum," ignite main
burner by opening main fuel shut-off valves.
Adjust main gas regulator to give the desired
outlet pressure. Refine pilot adjustment if it has
been affected. Adjust burner "minimum" by
turning in on the minimum stop screw of the gas
control valve until stable flame appears in the
narrow zipper channel at the base of burner
mixing plates.
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