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SECTION 4

VSRT-IOM-2022-0728

MAINTENANCE & TROUBLESHOOTING

4-9

2. Inspect the pilot assembly

» Ensure that the pilot or

ifice is not clogged.

» Inspect and ensure that there are no signs of

overheating, these would be visible as burnt or
scaling metal, or distortion of the pilot parts

» Inspect the gap from the ignition electrode to

the sparking notch in the pilot sleeve.

» Electrode should be centered vertically in the

notch, and the minimum gap from electrode to
sparking surface should be 3/16”

» Ensure that the ceramic on the ignition

electrode is not cracked or damaged

If any parts of the pilot assembly or the deadzone of the
burner are overheated, this could indicate a failure in the seal
at the burner plate, or the premix transition, which allows
combustion to flow upward. Inspect all seals if this is the case.

NOTE:

Removing the burner plate will require replacement

gaskets.

Inspection/Cleaning of the Burner Assembly for
VSRT 9.5-80 BHP

1. Remove Burner

» Loosen the flexible coupler between the

blower fan and the premix transition. It should
only be necessary to loosen the end of the
transition, but both can be loosened.

» Loosen the hose clamps on the flex connector

closest to the burner inlet elbow. Once these
hose clamps are loose, slide the flex connector
back towards the front of the boiler.

» Lift the premix transition straight up, then slide

out of the flexible coupler.

» You should now be able to lift the burner

straight out of the burner plate (NOTE: Do
not remove burner plate, as gasket will need
replacement if it is moved).

2. Inspect and Clean the Burner

» The burner should be clean and free of dust.

This can be accomplished using compressed
air. Blow compressed air through the
mesh from the outside in, then empty any
contaminates inside the burner can.

» Inspect the burner for signs of local

overheating, or soot. If soot is present, either
the pilot or the main burner is not running
the proper fuel air ratio, and the combustion
controls should be checked, while local
overheating will result in discolored mesh or
possible detaching or sagging.

» If there is evidence of deterioration or

corrosion, replace immediately.

» The burner must be removed to perform a

thorough inspection and cleaning. Vacuum
out the debris from the burner inside after
complete.

Inspection/Cleaning of the Burner Assembly For
VSRT 100-250 BHP

Most of the particulate matter in the combustion air stream
should be caught by a pre-filter or cyclone. However, it is
necessary to pull the burner head a minimum of once a year,
and inspect and clean it.

1. Remove Burner.

» Loosen the flexible coupler between the

blower fan and the premix transition. It should
only be necessary to loosen the end of the
transition near the fan outlet, but both can be
loosened.

» Loosen the hose clamps on the flex connector

closest to the burner inlet. Once these hose
clamps are loose, remove the premix transition
elbow. You should now be able to access the
burner plate.

» Remove components fastened to burner plate

(UV Scanner, Pilot, Premix elbow).