Trinity Tx51-151 & Tx151C
NATURAL TO LP CONVERSION INSTRUCTIONS:
Version Date: 2017-01-20
Kit Numbers:
84867-1, 84867-2, 84867-3, 84867-4
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
/O
and CO combustion analyzer.
2
2
Trinity boilers are factory set to operate with Natural Gas. BEFORE OPERATING WITH PROPANE the specified
LP-orifice must be installed between the Venturi and Gas Valve. There are four (4) versions of conversion kit 84867
(1, 2, 3 & 4); each kit contains an LP-orifice sized for a specific boiler model (see Table below). The orifice size is
stamped into each orifice; ensure the orifice being used corresponds to the boiler model being converted. Use the
procedures outlined in these instructions to fully complete the Natural Gas to LP conversion.
Kit Contents:
Natural to LP Conversion Instructions
Natural to LP Conversion Decal (p/n 84867)
LP-orifice (see below)
LP Conversion Kit and LP-orifice Identification:
Boiler Model No.
Tx51
Tx81
Tx101
Tx151, Tx151C
This conversion kit CANNOT be used to convert NTI appliance models not referenced in these
instructions. Contact NTI for the Natural Gas to LP conversion kit and instructions for other
models.
Failure to install the correct LP-orifice may result in dangerous Carbon Monoxide levels, fire or
explosion leading to property damage, personal injury or death.
Liquefied Petroleum (LP) propane gas is heavier than air; therefore, it is imperative that your boiler is not
installed in a pit or similar location that will permit heavier than air gas to collect. Local Codes may require
appliances fueled with LP gas be provided with an approved means of removing unburned gases from the
room. Check your local codes for this requirement.
Tx51-151(C) NG-LP Conversion Instructions
Size (mm)
3.5
3.8
4.2
5.05
ATTENTION: LIQUEFIED PETROLEUM (LP) PROPANE
84925
LP-orifice
Part No.
84869
84870
84871
84795
Conversion Kit
Part No.
84867-1
84867-2
84867-3
84867-4
1
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