The control operates a fresh air intake damper and, when necessary, activates the main HVAC blower to efficiently meet ASHRAE ventilation rates.
A fresh air duct and damper must be installed between the outdoors and the return side of the HVAC equipment. The W8150 control will be mounted near the HVAC system and wired between the thermostat and the fan control.
Today’s energy-efficient homes do a great job of keeping conditioned air in. The downside is that reduced ventilation and air exchange with the outside can result in poor indoor air quality and possible health problems. Even air systems that are designed with fresh air intake do not provide ventilation or exhaust when they are not running. Economical and affordable ventilation control systems are ideal for use with exhaust fans, air handlers, heat recovery ventilators, intermittent whole-house exhaust systems, or anywhere specific ventilation rates are desired. Mixing the house air can increase energy efficiency, reduce moisture condensation problems, and increase indoor air quality.
Typically, the damper is installed in a 6" duct that runs from the outdoors to the return side of the air handler on the central heating and cooling system. The control opens the damper to introduce fresh air when the air handler operates to satisfy a space heating or cooling call from the thermostat. Once the damper has been open the appropriate length of time to satisfy the calculated requirement for ventilation, the damper will no longer open during regular heating or cooling periods. Alternatively, if there have not been sufficient heating or cooling calls to introduce adequate fresh air, the control will open the damper and activate the air handler. The control resets and begins counting every 24 hours.
Features and Benefits
-Microcontroller optimizes the air delivery schedule to make efficient use of normal HVAC run times.
-Test mode that includes immediate feedback to installer to confirm that air delivery requirements of selected ventilation standard are being met.
-Economical supply-only ventilation; works with forced air system.
-W8150A Fresh Air ventilation Control
-EARD6 Fresh air damper (6” diameter, Powered Open/Spring Closed)
-Mounting hardware for control
-Homeowner information label
Power Supply: 24Vac
Power consummation 3.5VA
Input Setting Ranges:
Area: 1000-4600 sq ft.
Vent Airflow 40-160 cfm
-Installing a damper directly to the return duct may be convenient to support the damper and reduce ducting.
W8150 A Control
This setting determines the maximum amount of time that the fan runs for ventilation. Ventilation control reads the new dial setting only when test button is pushed or power is cycled.
Setting the control
Set the number of bedrooms dial
Set the sq ft area dial
Set the cfm airflow dial
For homes with multiple systems, Honeywell recommends a ventilation control and fresh air intake for each system.
The Honeywell Y8150 A is used in conjunction with central HVAC fan systems. It consists of a motorized damper, a transformer, and control that contains an "intelligent algorithm". The algorithm calculates the amount of ventilation needed based on particular settings for the home. The installer enters the square footage of the home, the number of bedrooms, and the amount of outdoor air being introduced when the air handler operates and the damper is open. The latter value is obtained by directly measuring the volume of air moving through the duct with a tool such as a pilot tube. The control then opens the motorized damper the appropriate amount of time to achieve the required volume of fresh air for the home.
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