Troubleshooting - SystemAir Fantech AEV Serie Manuel D'installation

14

Troubleshooting

Problem
Air is too dry
Air is too humid
Persistent condensation
on window
Poor Air Flows
Supply air feels cold
aev and/or Ducts frosting up
Condensation or Ice Build Up in
Insulated Duct to the Outside
Causes
Dehumidistat control is set too low
AEV out of balance
Dehumidistat control is set too high
Sudden change in temperature
Storing too much wood for heating
Dryer vent exhaust is inside home
Poor air circulation near windows
AEV out of balance
Basement door is closed
Improper adjustment of dehumidistat control
AEV out of balance
1/4" (6mm) mesh on the outside hoods is plugged
Filters plugged
House grilles closed or blocked
Damper are close if installed
Poor power supply at site
Ductwork is restricting thE AEV
Improper speed control setting
AEV airflow improperly balance
Poor location of supply grilles, the airflow may ir-
ritate the occupant
Outdoor temperature extremely cold
AEV air flows are improperly balanced
Malfunction of the AEV defrost system
Incomplete vapor barrier around insulated duct
A hole or tear in outer duct covering
Solutions
Increase the desired level of humidity. Change ventilation mode from
continuous mode to standby.
Balance AEV
Reduce the desired level of humidity. Combine this with the 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 step with 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 HRV 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
Have HVAC contractor balance the AEV
Note: minimal frost build-up is expected
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.