The room heating unit's brick core charge level can be regulated either manually or automatically. The method of control will be set at the time of installation. If the right indicator light is illuminated on the face plate, the heater is set for automatic charge control. If it is not illuminated, the heater is set for manual charge control. The room heating unit will come factory preset for automatic charge control.
If the room heating unit is set for automatic charge control, the brick core charge level will be regulated automatically in relation to outdoor temperature. With automatic charge control, outdoor temperature information can be supplied to the room heating unit in one of two ways: Steffes power line carrier system or direct wired outdoor sensor.
The outdoor sensor will monitor outdoor temperature and provide the information to the heater. The heater will respond by storing heat in the brick core accordingly. The outdoor temperature at which brick core charging in the heater is to begin and the outdoor temperature the heater should be at full brick core charge may be adjusted at the time of installation.
The room heating unit is shipped from the factory set for automatic charge control for use with the Steffes power line carrier control system. The heater comes factory preset to start charging at 60°F (15.6°C) and to be at full brick core charge at 20°F (-6.67°C).
An outdoor sensor can be direct wired into each room heating unit using low voltage wire. One outdoor sensor is required for each room heating unit that is installed.
If using a PLC signal for transmitting outdoor temperature information, DIP Switch #6 inside the heater on its microprocessor board must be in the "OFF" position. If using a direct wired outdoor sensor for transmitting outdoor temperature information, DIP Switch #6 inside the heater on its microprocessor board must be in the "ON" position.
NOTE: If manual charge control is being utilized, the data in Location 19 (L19) must be set to d02. It is the factory recommendation to also set the data in Location 7 (L07) to d02 so that both room and brick core temperatures can be adjusted after the M button is pressed for a few seconds. It may be necessary to unlock these locations to make the change. This is done by changing the data in Location 39 (L39) to d20. Remember to reset the lock when adjustments are complete.
No additional devices are required for brick core charging if the charge level is to be set manually by the user. Since the heater comes factory preset for automatic charge control, Location 19 (L19) must be adjusted to manual control. Location 7 (L07) should also be adjusted so that both room and brick core temperature can be adjusted after the M button is pressed for a few seconds.
If manual charge control is being used, the owner must periodically adjust the brick core charge level setting during the heating season in relation to outdoor temperature and the heating requirements of the area. To adjust the brick core charge level, do the following:
1. Press and hold the M button until a green bar appears on the MODE digit of the control panel face plate next to room setting. Release the button.
2. Press the M button again. The green bar on the MODE digit of the control panel face plate will move to indicate storage setting can be adjusted. Core charge level set point is displayed on the TEMPERATURE digits.
3. Press the up or down arrow buttons to adjust the core charge level set point. The core charge level can be set to any data value from 00 through 10.
00 = no core charging will occur
05 = 50% core charge will be maintained
10 = maximum core charge will be maintained
The face plate will automatically return to displaying current room temperature a few seconds after making an adjustment.