Bryant HEAT RECOVERY VENTILATOR HRVBB Troubleshooting Guide download pdf (Page 26)

2. Clear the exterior intake and exhaust vents of obstructions. Check the

outside vents regularly to ensure that the screen openings are not

obstructed by grass, bushes, leaves or other debris (see Figure 6).

Do not replace the screen with mesh smaller than ¼ inch because

it will block airﬂow. If the exhaust hood has a back-draft damper,

check it for free operation and proper positioning (the damper

should be closed when there is no airﬂow).

You might want to check the hoods more often in the autumn

(when there are leaves on the ground) and during the winter (to

ensure that snow or frost build-up does not block the openings).

Over time, you will become the best judge of how frequently

you should check your HRV hoods. If the openings are regularly

clogged or blocked, consider having the vent openings moved

higher up the wall.

3. Clean the heat-exchange core. Inspect the heat-exchange core

twice a year and clean it as required (consult your owner’s

manual for instructions on inspecting and cleaning the core).

A build-up of dust and dirt can restrict airﬂow and reduce the

efﬁciency of your HRV. After inspection and cleaning, make

sure the core is replaced right-side-up. It is also a good idea

to inspect the heat exchange core during very cold weather to

ensure that the defrost mechanism is working.

4. Clean the condensate drain and pan. Twice a year, check the

condensate drain (if your HRV has one) and tubing to ensure that

they are open and free-ﬂowing. To do this, ﬁnd the hole that leads

to the drain inside the unit. Then pour two or three litres of warm

water into the pan leading to the drain. If the water does not ﬂow

freely, unblock the drain using a piece of thin wire. The tubing

can be disconnected for cleaning. The condensate drain must

have a “trap” – an S or loop in the tubing that traps a quantity of

water – to prevent air from entering the HRV through this tubing

(see Figure 1, page 9).

You should also clean the condensate pan, located inside

the HRV.

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Bryant HEAT RECOVERY VENTILATOR HRVBB Troubleshooting Guide Page 26