Therma-Stor Products Group XT150H owner manual 3H Intermittent or Programmed Ventilation

FOR HVAC INSTALLER ONLY AND HOMEOWNER

The ventilation indicator “O” will be displayed whenever

the unit is ventilating. The fan operation indicator “O” will also be lit.

There are three damper operation modes, “OPEN – hold,” “CLOSED – hold” and “PROGRAM” (denoted by “ON TIME”

–“OFF TIME.” Refer to section 3.8). With the damper in the “OPEN – hold” mode, the damper will be open and the fan of the system will be operating in order to introduce fresh air into the space. Use this mode for continuous fresh air ventilation. The fan is always on when the damper is open. When in “CLOSED

–hold” mode, the damper will not open and the system will not ventilate.

When in the “program” mode, the control will operate the damper and fan (ventilate) according to the programmed ventilation schedule (See Section 3.8).

To set the damper operation:

1.Press the “VENT” button. The current setting will begin to flash on the display. Release the button.

2.Press the “VENT” button again to toggle between “open,” “closed” and “program.”

3.Leave the control alone for 10 seconds to select the indicated damper mode and return to “home.”

5.3H Intermittent or Programmed Ventilation

There are two programs available for ventilation Monday through Friday. There are also two programs for Saturday and Sunday. No other choice of days is available.

Each program has:

•A “START” time of day when the ventilation schedule begins.

•An “OPEN FOR” duration for the amount of time the damper stays open in 5 minute intervals, from 0 to 60.

•A “CLOSED FOR” duration which closes the vent for a specified time in 5 minute intervals from 0 to 60.

Example:

1.Press “program enter” button. The following menu appears:

2.Using the up/down RH buttons, select “program.” The following menu appears:

You can select from:

“MON-FRI”or “SAT-SUN” for separate weekday/weekend schedules or “MON-SUN”which gives you equal weekday/ weekend schedules.

Menu when you select “MON-FRI”or “SAT-SUN”:

The system will operate the ventilation function according to the current ventilation program. The control needs to be programmed to turn the ventilation function on and off at the desired intervals. This is done by programming the ventilation timer.

1.Enter the starting time for weekdays using the up/down RH keys to change the time.

16 Ultra-Aire XT150H Installer’s & Owner’s Manual