Accessory Control Details

ELECTRONIC AIR CLEANER OPERATION

The Model 6504 is equipped with control capabilities for your Electronic Air Cleaner to assure its operation during all times the system blower is active. In addition, there is an LED labeled “EAC” on the control panel to display that the air cleaner is running.

Your thermostat has a built-in monitor to alert you when it’s time to change the media in your air cleaner. Consult your thermostat owners’ manual for details.

VENTILATION CONTROL OPERATION

The Model 6504 is equipped with control capabilities for either an Energy Recovery Ventilator (ERV) or a fresh air intake damper. Consult your installer to determine which type of ventilation was installed.

There are two settings adjusted through dip switches on the Model 6504 Control Panel that control the amount of ventilation that will be delivered to your home. One is the Vent Cycle and the other is the Vent Time. Here’s how it works: if you set the Vent Cycle to 1 hour and the Vent Time to 15 minutes, you will get 15 minutes of ventilation every hour. It is important to understand that the ventilation requirement (15 minutes per hour in this example) may be satisfied during a heating, cooling or continuous fan call initiated by your thermostat or from the control panel itself. For example, if, during the one hour Vent Cycle, your HVAC equipment only turned on for 10 minutes, you would get ventilation during that 10 minutes of equipment run time, and then the control panel would turn on the fan during the last 5 minutes of the Vent Cycle to ensure that you receive the full 15 minutes of ventilation.

VENT TIME – Sets the amount of time that the ERV will operate or the Ventilation Damper will be open during the Vent Cycle Period.

15 minutes

30 minutes

45 minutes

60 minutes

VENT CYCLE – Sets the period over which the amount of ventilation run time will be summed. For example, if the Vent Time is set for 30 minutes and the Vent Cycle is set for 1 hour, the ERV or Ventilation Damper will be operated for 30 minutes per hour.

DIP SWITCHES LOCATED

ON MODEL 6504 CONTROL PANEL

1 Hour

2 Hours

3 Hours

4 Hours

An Energy Recovery Ventilator (ERV) like the Aprilaire Model 8100, exchanges heat and moisture from the indoor air to the outdoor air ensuring that air is pre-conditioned before entering your home or office. The control panel will not limit ventilation when controlling an ERV. Use of a Ventilation Damper is an economical way to get outdoor air into your home or office, but unlike the ERV it does not pre-condition the air. Control of a ventilation damper is enhanced by the Model 6504 Control Panel when an outdoor temperature sensor is installed with your system and enhanced even more when an Aprilaire Automatic Humidifier has been installed. Direct ventilation from outside can increase the heating or cooling load on your heating and cooling equipment or cause uncomfortably cool or warm drafts. Bringing in moist air can cause the indoor relative humidity to reach uncomfortable, “stuffy feeling” levels. With an outdoor temperature sensor installed, the control panel will discontinue ventilation if the outdoor temperature is above 100°F or lower than 0°F, and will limit ventilation to occur only when the heat is on when the outdoor temperature is between 20°F and 0°F. When an Aprilaire Automatic Humidifier is installed, ventilation is also discontinued when the indoor relative humidity is above 55% RH and the outdoor temperature is above 50°F.