Honeywell W8150 Ventilation Hood User Manual


 
Y8150 FRESH AIR VENTILATION SYSTEM, W8150 FRESH AIR VENTILATION CONTROL
9 68-0282—07
HVAC fan is running all
the time
Device is set to override Move switch to On position to allow for automatic operation.
Remote switch is on Adjust remote switch to desired position.
Thermostat Fan switch is
in On position
Normal operation.
HVAC system is running
to satisfy heating or
cooling requirements.
Normal operation.
Ventilation limit is set to
100% ventilation limit.
Set ventilation limit to 60%. The control may not be able to meet the
recommended ventilation requirements.
Increase ventilation airflow through fresh air duct and adjust settings.
Low ventilation air flow. See Problem: Not enough airflow.
Damper does not
open during
checkout or
Damper does not
close.
Incorrectly wired. Check wiring connections per appropriate wiring diagram.
Transformer output. Verify 24 Vac applied to actuator.
Damper actuator motor
failure or mechanical
failure.
Manually open damper and verify free movement; damper should return
to closed position when no power is applied.
If damper moves freely but does not operate when 24 volts is applied,
replace damper actuator.
If damper does not move freely, replace fresh air damper.
Cooling compressor
comes on when there
is no cooling call from
the thermostat.
Incorrectly wired. Check wiring connections per appropriate system diagram.
An isolation relay may be required when appliances are connected to the
G
T terminals on the ventilation control. (For an example, see wiring a fan
for a steam humidifier diagram.)
Not enough airflow Obstruction or duct size Check for obstructions in the fresh air duct and weather hood.
Check for kinks in ductwork.
Make sure all manual dampers are fully open.
Make sure the stops on the EARD damper allow it to open fully.
Increase duct size.
Add a booster fan to the fresh air duct.
NOTE: After any changes to the ductwork, repeat the Measuring Airflow
section.
Problem Possible cause What to do