NTI FTVN Series User Manual

Applicable Models:
FTVN085, FTVN110, FTVN150, FTVN199,
FTVN110C, FTVN150C, and FTVN199C
FTVNFTVN
NATURAL TO PROPANE NATURAL TO PROPANE
CONVERSION INSTRUCTIONSCONVERSION INSTRUCTIONS
This conversion kit shall be installed by a qualified
service agency in accordance with the manufacturer’s
instructions and all applicable codes and requirements
of the authority having jurisdiction. If the information
in these instructions is not followed exactly, a fire, an
explosion or production of carbon monoxide may result
causing property damage, personal injury or loss of
life. The qualified service agency is 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
2
/O
2
AND CO COMBUSTION ANALYZER.
WARNING

NTI FTVN Series Specifications

General

Heat Exchanger Material	Stainless Steel
Boiler Type	Condensing
Fuel Type	Natural Gas
Ignition Type	Electronic
Vent Material	PVC/CPVC
Control	Touchscreen

Summary

General Safety Information

Pre-Conversion Safety Precautions

Ensure kit contents match boiler model and follow initial setup guidelines.

LP Gas Properties and Handling

LP gas is heavier than air; ensure proper ventilation and installation location.

Carbon Monoxide Hazard Awareness

Emphasizes CO danger, need for detectors, and proper venting.

Propane Conversion Procedure

Install LP-Mixer and Diaphragm

Step-by-step guide to replace the Natural Gas mixer with the LP version.

Perform Gas Valve Preliminary Adjustment

Adjust gas valve throttle screw per model for propane operation.

Gas Valve and Burner Setup

Pre-Setup Operating Sequence Check

Essential checks before gas valve and burner setup, including gas supply and fan purges.

Measure and Adjust Gas Line Pressure

Procedure for connecting a gauge, measuring, and adjusting gas line pressure.

Checking and Adjusting CO2

Prepare for Combustion Analysis

Instructions for connecting a calibrated combustion analyzer to the flue test port.

CO2 Adjustment at Maximum Gas Flow

Guide to setting the CO2 level at maximum heating power using the gas valve.

CO2 Adjustment at Minimum Gas Flow

Guide to setting the CO2 level at minimum heating power using the gas valve.

Finalizing Conversion Adjustments

Steps to exit test mode, check for leaks, and reassemble the unit.

Update Appliance Rating Plate

Instructions on applying decals to indicate the conversion to propane gas.