General Instructions for HM Series Furnace Modules
This furnace module must be installed in a non-combustible duct or cabinet on the positive pressure side of the
circulating air blower and is not designed to have any portion of the heat exchanger exposed outside the duct
or cabinet in which this furnace module is housed.
A Nameplate / Rating Plate is attached to the heater assembly to identify the model and serial number of this product. This plate
must be left attached when the module is installed in the product for identification purposes. This plate also contains information
including gas type, maximum and minimum input rating, manifold pressure, maximum and minimum inlet gas pressure, maximum and
minimum airflow requirements, output capacity and electrical ratings for this module.
This product must be applied in accordance with the requirements of its recognition. Consider maximum input ratings, maximum and
minimum temperature rise and maximum and minimum airflow.
The final determination of the safety and suitability of this product for the specific application shall be the responsibility of
the manufacturer of the “Listed” equipment and the listing Agency.
Equipment access panels and doors should be sized and located to provide easy access for servicing, adjustment and maintenance
of the heating units installed. Consideration should be given to components that might require replacement during the life of the
product. .All set-up and test points as well as operating controls should be visible and readily accessible from the front of the vestibule
or access opening.
General Information to include in Installation and Operating Instructions
The “Listed” equipment manufacturer’s Installation and Operating Instructions shall provide all necessary information as required by
ANSI Z83.8 –CSA 2.6 for the application, including but not limited to the following; Installation Codes, Hazard Warnings, gas piping,
electrical connection, Lighting Instructions, Sequence of Operation, Manual reset switches, Wiring Diagrams, Clearance to
Combustibles, Airflow and Rise ranges, Venting and troubleshooting, Minimum input rate adjustment, and for checking the gas
tightness of the safety shut-off valve(s) on at least an annual basis, as identified in the sections of the referenced standards identified
in “Instructions” and “Marking”.
Reference to the following information must be included in the instructions that the OEM provides with the finished product.
oAll unit installations must be in accordance with the National Fuel Gas Code ANSI Z223.1 (NFPA 54) in the US and
Can/CGA-B149 Installation Code in Canada and all applicable local codes and ordinances.
oA WARNING that the furnace is not certified or suitable for use in drying or process applications. Use in such applications
voids any warranty and manufacturer disclaims any responsibility for the duct furnace and/or application
oA WARNING that the Gas-fired furnaces are not designed for use in hazardous atmospheres containing, flammable vapors
or combustible dust, in atmospheres containing chlorinated or halogenated hydrocarbons, or in applications with airborne
substances containing silicone.
oA WARNING that the presence of chlorine vapors in the combustion air supply to gas fired heaters presents a substantial
corrosion hazard.
oA WARNING: The use and storage of gasoline or other flammable vapors and liquids in the vicinity of this appliance is
hazardous.
oWARNING label attached to exterior of cabinet as required by Z83.8-CSA 2.6 Sections 4.31.7.
oSafety, lighting, operating and shutdown instructions
oAll electrical equipment must be grounded and wired be in accordance with the National Electric Code (ANSI/NFPA 70) in
the US and the Canadian Electric Code (CSA C22.1) in Canada.
oA statement to cover replacement wiring “ If any original wire as supplied with the appliance must be replaced, it must
be replaced with wiring material having a temperature rating of at least 105 oC (221 oF).”
