Y8150 FRESH AIR VENTILATION SYSTEM, W8150 FRESH AIR VENTILATION CONTROL
9
68-0282—11
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 EARD6TZ 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 Air-
flow section.
Problem
Possible cause
What to do
