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VZ-VZH-VZT-IOM (08-24) 1047121-A
GENERAL INFORMATION—CONTINUED
Important Safety Information—Continued
⚠ WARNING ⚠
• Gas-fired appliances 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 silicone substances.
• Should overheating occur, or the gas supply control system fail to shut off the flow of gas, shut
off the manual gas valve to the unit before shutting off the electrical supply.
• Do not use this appliance if any part has been under water. Immediately call a qualified service
technician to inspect the appliance and replace any gas control that has been under water.
• Installation should be done by a qualified agency in accordance with these instructions. The
qualified service agency installing this heater is responsible for the installation.
• This appliance is not intended for use by persons with reduced physical, sensory, or mental
capabilities or lack of experience and knowledge, unless they have been given supervision or
instruction concerning use of the appliance by a person responsible for their safety.
• Children should be supervised to ensure that they do not play with the appliance.
⚠ CAUTION ⚠
• Never rest anything—especially a ladder—against the heater.
• To prevent damage to the unit or to its internal components, it is recommended that two wrenches
be used when loosening or tightening nuts. DO NOT OVERTIGHTEN!
Warranty
Refer to the limited warranty form in the literature bag provided with the unit. The warranty is void if:
• Wiring is not in accordance with the diagram furnished with the unit.
• The unit is installed without proper clearance to combustible materials.
• Required turbulator or swirler is missing or incorrectly installed.
• The unit is exposed to halogenated hydrocarbons.
Certification
These heaters are listed to ANSI Z83.20/CSA 2.34, 2.17, 2.20 for indoor use only in the US and Canada by the
Canadian Standards Association (CSA). They are not approved for residential dwellings. They are approved without
modification for installation elevations up to 2,000 feet (610 meters) in the US and up to 4,500 feet (1,370 meters)
in Canada. A high-elevation conversion kit is available for higher installation elevations.
Installation Codes
• These units must be installed in accordance with local building codes. In the absence of local codes, in the United
States, the unit must be installed in accordance with the National Fuel Gas Code (NFPA 54/ANSI Z223.1, latest
edition). A Canadian installation must be in accordance with the Natural Gas and Propane Installation Code (CSA
B149, latest edition). This code is available from CSA Information Services, 1-800-463-6727. Local authorities
having jurisdiction should be consulted before installation is made to verify local codes and installation procedure
requirements.
• Installations in aircraft hangars should be in accordance with the Standard for Aircraft Hangars (ANSI/NFPA No.
409, latest edition). Installations in public garages should be in accordance with the Standard for Parking Structures
(ANSI/NFPA No. 88A, latest edition). Installations in repair garages should be in accordance with the Standard for
Repair Garages (ANSI/NFPA No. 88B, latest edition). In Canada, installations in aircraft hangars public garages
should be in accordance the CSA B149 code.
• If the heater is being installed in the Commonwealth of Massachusetts, installation must be performed by a licensed
plumber or licensed gas fitter.
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