5. COMBUSTION ANALYSIS OVERVIEW
Testing for carbon monoxide, oxygen, and stack temperature is very important to
the overall safety and efficiency of heating equipment. The following guidelines
and descriptions are generic and meant to provide you with a basic understand-
ing of combustion testing. TPI always recommends you contact the manufacturer
of the device under test, obtain information specific to the device, and follow the
procedures and safety guidelines for performing tests and affecting repairs.
In general, for most applications flue gas samples should be taken prior to the
draft diverter or any other opening that allows room air to enter the system. This
prevents room air from mixing with gases in the flue and diluting the test sample.
To ensure accurate and consistent combustion tests, it is important gas and tem-
perature samples be taken at the same location. This is easy with the TPI flue
probe because the temperature sensor is an integral part of the probe.
Prior to taking a sample, the device under test should be on and operating.
Putting the flue probe in the sample area prior to starting the device may cause
saturation of the sensors due to the higher initial concentration of carbon monox-
ide that may be encountered upon start up. If this happens, allow your analyzer to
purge in fresh air until the carbon monoxide level returns to 0 ppm and the oxy-
gen level returns to 20.9%. This may take more than an hour depending on how
saturated the sensors are.
The included figures show locations for performing tests on commonly encoun-
tered equipment. Remember to consult with the manufacturer of the device under
test for specific test information.
NOTE: When selecting oil as fuel be sure to use the optional
oil filter (A773) or readings could become erratic. See
Appendix E for installation instructions.
Appendix B: CALIBRATION & SERVICE
It is recommended that the instrument be calibrated every 12 months. Please
consult Test Products International for further details.
The following are consumable parts for the instrument:
In-Line Filter Element (pkg of 5)
User Replaceable
A794F
Mini Pump Protection Filter Assem. User Replaceable
A763
**Oxygen Sensor
User / Factory Replaceable
A761
**Carbon Monoxide Sensor
User / Factory Replaceable
A760
**Sensor replacement requires calibration gas.
The following are accessories for the instrument:
Flue Temperature Probe w/k-type
Standard
A770
'K' Type Temperature Probe
Standard
GK11M
In-Line Filter Complete
Standard
A794
Mini Pump Protection Filter Assem. Standard
A763
Rubber Boot
Standard
A765
Infrared Printer
Optional
A740
Soft Carrying Case
Standard
A768
Exhaust Spigot
Standard
A764
Appendix C: GUARANTEE
Your TPI 709R Flue Gas Analyzer is guaranteed free from defects in materials
and workmanship for 3 Years from the date of purchase. This guarantee does
not affect your statuary rights. For additional information please refer to the
included warranty card or contact TPI at 800-368-5719.
To obtain warranty performance or maintenance on your analyzer: - Include
with the product your name, address, phone number, written description of
the problem and proof of purchase date. Carefully package and return to:
TPI / Attn. Repair
9615 SW Allen Blvd. Suite 104
Beaverton, OR 97005
