Fantech AEV 1000 Nstallation, Operation And Maintenance Manual - Troubleshooting
Solutions
Causes
Problem
Dehumidistat control is set too low
Dehumidistat control is set too high
Sudden change in temperature
Storing too much wood for heating
Dryer vent exhaust is inside home
Poor air circulating near windows
Basement door is closed
Improper adjustment of dehumidistat
control
Air is too dry
Air is too humid
Persistent condensation
on window
Increase the desired level of humidity. Change ventilation mode from
continuous mode to standby.
Balance AEV
Reduce the desired level of humidity. Combine this step with use of
continuous exchange mode.
Wait until outside temperature stabilizes (winter). Heating will also
improve situation.
Store a majority of your wood outside. Even dried, a cord of wood
contains more than 20 gallons of water.
Arrange outside vent for dryer.
Open curtains or blinds. Bay or bow windows may require mechanical
method.
Balance AEV
Open the door or install a grill on the door.
Reduce the desired level of humidity. Combine this with the use of
continuous exchange mode.
Balance AEV
-clean exterior hoods or vents
-remove and clean filter
-check and open grilles
-have electrician check supply voltage at house
-check duct installation
-increase the speed of the AEV.
-have contractor balance AEV
-locate the grilles high on the walls or under the baseboards, install
ceiling mounted diffuser or grilles so as not to directly spill the supply
air on the occupant (eg. Over a sofa)
-turn down the AEV supply speed. A small duct heater (1kw) could
be used to temper the supply air
-placement of furniture or closed doors is restricting the movement
of air in the home
-if supply air is ducted into furnace return, the furnace fan may need
to run continuously to distribute ventilation air comfortably
-Note: minimal frost build-up is expected
-have HVAC contractor balance the AEV
-Duct heaters
-tape and seal all joints
-tape any holes or tears made in the outer duct covering
-ensure that the vapour barrier is completely sealed.
-1/4” (6mm) mesh on the outsid hoods
is plugged
-filter plugged
-house grilles closed or blocked
-dampers are close if installed
-poor power supply at site
-ductwork is restricting AEV
-improper speed control setting
-AEV airflow improperly balance
Poor Air Flows
-poor location of supply grilles, the air-
flow may irritate the occupant
-outdoor temperature extremely cold
Supply air feels cold
-AEV air flows are improperly balanced
-malfunction of the AEV system
AEV and / or Ducts
Frosting up
-incomplete vapour barrier around
insulated duct
-a hole or tear in outer duct covering
Condensation or Ice
Build Up in Insulated
Duct to the Outside
AEV out of balance
AEV out of balance
AEV out of balance
TROUBLESHOOTING
13
Fan Tech at
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