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SECTION 1 SAFETY PRECAUTIONS
SECTION 1. SAFETY PRECAUTIONS
1.1 Warnings & Cautions
Installers and operating personnel MUST, at all times, observe all safety regulations. The following
warnings and cautions are general and must be given the same attention as specific precautions
included in these instructions. In addition to all the requirements included in this AERCO Instruction
Manual, the installation of units MUST conform with local building codes, or, in the absence of local
codes, ANSI Z223.1 (National Fuel Gas Code Publication No. NFPA-54) for gas-fired boilers and
ANSI/NFPASB for LP gas-fired boilers. Where applicable, the equipment shall be installed in accordance
with the current Installation Code for Gas Burning Appliances and Equipment, CSA B149.1, and
applicable Provincial regulations for the class, which should be carefully followed in all cases. Authorities
having jurisdiction should be consulted before installations are made.
See section 1.4 for important information regarding installation of units within the Commonwealth of
Massachusetts.
This manual is an integral part of the product. It must be maintained in a safe place in legible
condition and given to the user by the installer for future reference.
● Do NOT under any circumstances use matches, candles, flames, or other sources of ignition to check for
gas leaks. Failure to heed this warning may result in death or serious injury.
● Fluids under pressure may cause injury to personnel or damage to equipment when released. Be sure to
shut off all incoming and outgoing water shutoff valves. Carefully decrease all trapped pressures to zero
before performing maintenance.
● Shut off all gas and electrical inputs to unit before performing any maintenance.
● The exhaust vent pipe of the unit operates under a positive pressure and therefore must be completely
sealed to prevent leakage of combustion products into living spaces.
● Electrical voltages up to 480 VAC and 24 volts AC may be used in this equipment. Therefore, to operate
safely the cover on the unit's power box (located behind the front panel door) must be installed at all
times, except during maintenance and servicing.
● A single-pole (120 VAC units) or three-pole (220+ VAC units) switch must be installed on the unit's
electrical supply line. The switch must be easily accessible to quickly disconnect electrical service for
maintenance. Do not affix switch to unit sheet metal enclosures.
• Many soaps used for gas pipe leak testing are corrosive to metals. The piping must be rinsed thoroughly
with clean water after leak checks have been completed.
• DO NOT use this boiler if any part has been under water. Call a qualified service technician to inspect and
replace any part that has been under water.
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