Retrotec Commercial 441 and 451 DucTester - Manual (Page 6)

Page 6 of 56
©Retrotec Inc. 2015
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Keep hands, hair and clothing away from fan at all times.
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The fan can cause damage or injury if it were to fall on someone/something.
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Do not use equipment for other than its intended use.

Do not stand on the fan, or use the fan to support the weight of another object.
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To protect against risk of electric shock, do not place this equipment or power cord in water or
other liquid.

Press the power plug firmly into the power receptacle on the fan. Failure to do so can cause
over-heating of the power cord and damage the fan.

Do not use ungrounded outlets or adapter plugs. Never remove or modify the grounding prong.

Do not operate any device with a damaged electrical cord, or after an equipment malfunction.

Use only the included power plug to operate the fan.
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Turn the unit off and unplug from any electrical outlet before moving and when not in use, or
when making any adjustments to the fan motor or electrical components.

For use under indoor conditions only.

For use where there is no exposure to water or dusty substances or explosive materials or
flammable materials.

Ensure proper cooling of the fan motor.

Equipment is intended for diagnostic testing and to be operated for brief periods under
supervision by a qualified operator. Not to be used in a role as a household appliance for the
purpose of moving air.

Failure to follow these instructions carefully may result in bodily injury, damage to property
and/or equipment failure. Failing to operate equipment as intended may void warranty and
compliance with CE mark and other listings.
Important occupant safeguards during testing
Please read the following carefully before carrying out tests:

If dust, pollen, mold spores, chemicals or other undesirable substances can get blown into living
spaces, keep those susceptible to these substances away from the test area, and wear dust
masks.

Do not pressurize a duct system with air that is polluted or exposed to any toxic substances. For
example, blowing air from a car-port into a house or duct system while a motor vehicle is
running can quickly fill a house with toxic carbon monoxide.

If combustion safety problems are found, tenants and building owners should be notified
immediately and steps taken to correct the problem including notifying a professional heating
contractor if basic remedial actions are not available.

Air sealing duct work may change the pressure balance in a house and cause back drafting
where it did not occur before. For example, a return leaking to outdoors may have pressurized a
house but when corrected, leaky supplies may reverse that and cause depressurization which
could result in back drafting hot water heaters, furnaces or fireplaces.

Be aware of all possible sources of combustion. Ensure any appliances do not turn on during the
test. Turn off power to the appliance, or set the appliance to the "Pilot" setting. It is possible
for flames to be sucked out of a combustion air inlet (flame rollout) during a test, which is a fire
hazard and can result in high carbon monoxide levels.

If combustion safety problems are found, tenants and building owners should be notified
immediately and steps taken to correct the problem (including notifying a professional heating
contractor if basic remedial actions are not available). Remember, the presence of elevated
levels of carbon monoxide in ambient building air or in combustion products is a potentially life
threatening situation. Air sealing work should not be undertaken until existing combustion
safety problems are resolved, or unless air sealing is itself being used as a remedial action.