Operator`s manual

PUREHEAT™ HYDRONIC AIR HEATER OPERATOR’S MANUAL – SECTION 3
V. 2, Rev. 09/01/06 © 2006 Ground Heaters, Inc. 3- 3
3.1.1.3 O
2
Content Sampling
1. Follow the combustion analyzer manufacturer’s instructions for pre-purge and exhaust sampling.
2. Sample the exhaust gas
by inserting the combustion analyzer sampling probe into the chimney access
hole provided through the exhaust guard. The
probe must be greater than 5 in. (127 mm) in length for
an
accurate sampling. Exhaust O
2
content must be 3 to 4% for optimum performance and minimum
soot production.
3. Several samples should be taken as the heater warms. The final sample should be taken just before
the heater reaches 180ºF (82.2ºC).
3.1.1.4 Smoke Spot Sampling
1. Follow the smoke spot tester manufacturer’s instructions for accurate exhaust sampling.
2. Start the Burner by turning the BURNER Switch ON. The Burner will start and begin a 45 second pre-
purge followed by the ignition sequence
3. Sample the Burner exhaust for smoke
by inserting the smoke spot sampling probe into the chimney
access hole provided through the exhaust guard. The
probe must be greater than 5 in. (127 mm) in
length
for an accurate sampling. Smoke spot production must be 2 or less.
4.
Several samples should be taken as the heater warms. The final sample should be taken just before
the heater reaches 180ºF (82.2ºC).
NOTE: Higher O
2
percentage (excess air settings) lowers soot production but raises stack temperature
and reduces efficiency. Lower O
2
percentage (inadequate air settings) increases efficiency and
lowers stack temperature but may cause soot build-up. A Burner optimized for clean and efficient
operation will have O
2
levels of 3 to 4% and a smoke spot value of 1 or less.
5. Loosen the air dampers locking screws enough to provide movement for adjustment. Open the top
damper 45%, and fully shut the bottom damper. (Refer to Appendix A-24)
6.. Adjust the air dampers until combustion parameters fall within the above outlined values.
7. Lock the air dampers in place by tightening the locking screws.
3.1.2 Burner Shutdown
1. Shut down the Burner by turning the BURNER Switch OFF.
2. Turn MAIN BREAKER 1 and MAIN BREAKER 2 Switches OFF.
3. Shut the Main Gas Supply Ball Valve. Remove the manometers, petcocks and adapters, and reinstall
pipe plugs (use pipe dope).
NOTE: Should the Burner fail to respond during any of the air adjustments or if the fuel pressure cannot
be adjusted or drifts, discontinue Burner setup and contact your Pureheat™ Distributor.
3.2 DIESEL/FUEL OIL
3.2.1 Burner Adjustment
Before beginning these steps, it is assumed that the optional diesel Burner has been installed per Section
4.2.1.
NOTE: The use of a high quality combustion analyzer and fuel pressure test gauge is mandatory
. All
adjustments
must be accomplished by an experienced fuel oil Burner professional and must
conform
to the requirements of local, state and federal codes and authorities.