Bryant HEAT RECOVERY VENTILATOR HRVBB Troubleshooting Guide download pdf (Page 27)

FIGURE 6

Checking exterior inlets and outlets

5. Service the fans. The fans on many HRVs are designed to

operate continuously without lubrication. Your owner’s manual

will indicate whether lubrication or service is necessary. If

the fans require lubrication, use proper motor lubricating oil

(non-detergent oil). Do not use too much oil because this may

damage the motor. Inspect the blower fans periodically for dirt

on the blades, and remove it by gently brushing the blades or

using a vacuum cleaner.

6. Clean the grilles and inspect the ductwork. Clean the duct grilles

when they are dusty or greasy. At least once a year, visually

inspect the interior surfaces of the ductwork leading to and from

the HRV. These surfaces will collect dirt over time. However,

professional ductwork cleaning is usually needed only once every

two years.

Kitchen exhaust grilles should have ﬁlters to catch grease. Clean

these ﬁlters on a regular basis or as required.

Check for punctures in the insulation jacket (the protective

cover that seals the insulation) on the fresh air and exhaust air

ducts. Repair punctures by using foil duct tape. Otherwise, they

can lead to condensation problems, including wet insulation,

water on the ﬂoor and, occasionally, ice build-up. If the

insulation itself is damaged, take the steps indicated in the

“HRV troubleshooting guide” on page 29.

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Bryant HEAT RECOVERY VENTILATOR HRVBB Troubleshooting Guide Page 27