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TFTN
NATURAL GAS TO PROPANE GAS
CONVERSION INSTRUCTIONS
Applicable Models:
TFTN500, TFTN600, TFTN725, and TFTN850
WARNING
service agency in accordance with the manufacturer's
instructions and all applicable codes and requirements
of the authority having jurisdiction. If the information
an explosion or production of carbon monoxide
may result causing property damage, personal
responsible for the proper installation of this kit.
THE INSTALLATION IS NOT PROPER AND COMPLETE
UNTIL THE OPERATION OF THE CONVERTED
APPLIANCE IS CHECKED AS SPECIFIED IN THE
MANUFACTURER'S INSTRUCTIONS SUPPLIED WITH
THE KIT, WHICH NECESSITATES THE USE OF A
CALIBRATED
CO
/O
AND
CO
COMBUSTION
2
2
ANALYZER.
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Summary of Contents for NTI TFTN500
- Page 1 TFTN NATURAL GAS TO PROPANE GAS CONVERSION INSTRUCTIONS Applicable Models: TFTN500, TFTN600, TFTN725, and TFTN850 WARNING service agency in accordance with the manufacturer's instructions and all applicable codes and requirements of the authority having jurisdiction. If the information an explosion or production of carbon monoxide may result causing property damage, personal responsible for the proper installation of this kit.
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Page 2: Part 0. General Safety Information
Table 1 – LP-Mixer Identification If the kit contents do not match those specified for your boiler model (see Table 1), DO NOT proceed with installing the LP Conversion Kit, and DO NOT operate the boiler - contact NTI for assistance. - Page 3 NTI appliance models not air; therefore, it is imperative referenced in these instructions. that your boiler is not installed Contact NTI for the Natural Gas to in a pit or similar location that LP conversion kit and instructions will permit heavier than air for other models.
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Page 4: Part 1 Propane Conversion Procedure
Part 1 Propane Conversion Procedure 1. Install LP-Mixer a. Check that the code of the LP-Mixer is the one indicated for the model of boiler to be converted – see Table 1. b. Turn the 120 V AC power and gas supply off to the boiler. c. - Page 5 Part 1 Propane Conversion Procedure Silencer Box Mixer Gas Outlet Manifold Gas Valve Throttle Screw Turn in (clockwise) 1 turn; then proceed with Gas Valve and Burner Setup. Figure 1 – Mixer Replacement and Throttle Screw Pre-set...
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Page 6: Part 2. Gas Valve And Burner Setup
Min Power (10%). Low Gas Pressure Switch GML (front) Factory-set to close at 3 in. w.c. High Gas Pressure Switch GMH (rear) Factory-set to open at 20 in. w.c. Figure 2 – Gas valve adjustment for TFTN500-850... -
Page 7: Operating Sequence
Part 2. Gas Valve and Burner Setup f. Observe the line pressure with the boiler WARNING running, while checking/adjusting the at Max Power (100%) and compare it Failure to perform the Gas Valve to Table 2. The pressure will be lowest during the maximum flow of gas. - Page 8 Part 3. Checking/Adjusting the CO 2 at Max and Min Power WARNING Adjustments to the Gas valve may 1. Preparing the measuring equipment Make sure that the combustion test technician, while using a calibrated probe is well-sealed at its point of entry combustion analyzer capable of into the flue pipe.
- Page 9 Part 3. Checking/Adjusting the CO 2 at Max and Min Power Checking/ Adjusting the at Max Power Adjusting the Gas Valve at Max Power Adjust the gas valve by turning Set the thermostats at the highest possible throttle screw counterclockwise to setting to create a demand for heat.
- Page 10 Min Power Max Power Model B u r n e r P ower B u r n e r P ower TFTN500 TFTN600 100% TFTN725 TFTN850 1. Canada: Altitudes between 2000-4500 ft, de-rate by 10%. Consult local authorities for de-rating for altitudes above 4500ft.
- Page 11 Part 3. Checking/Adjusting the CO 2 at Max and Min Power 5. Update rating plate Gas to LP Conversion Kit, you must indicate on the boiler that it has been converted for use with Propane (LP) Gas: a. Update Rating Plate Decal – Locate the rating plate decal on the side of the appliance.
- Page 12 Visit us online NTI Boilers Inc. 30 Stonegate Drive Saint John, NB E2H 0A4 Canada Technical Assistance: 1-800-688-2575 Website: www.ntiboilers.com Fax: 1-506-432-1135 87519 Rev. 23.8.02...
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