Peak Status
Peak (P) During this period, the system is not allowed to charge. In time-of-use (TOU) areas, the heater can charge, the cost of power will be more expensive.
Charge (C) During this period, the system is allowed to charge, and the power costs are at their lowest.
Anticipated Peak (A) This is often referred to as a pre-peak, mid-peak, or shoulder charge period. It is generally used in time-of-use (TOU) areas where there is a three-tiered rate. Electricity used during this period is less expensive than during peak but more expensive than during charge.
AM & PM Indicator Lights
Between the second and third digits of the display, two dots are used to indicate a.m. and p.m. times when using a Steffes time clock module. When the heater is programmed for a time clock module, the lights will illuminate. One of the lights will be solid, and the other light will flash. For example, if the heater is set for 7 p.m., the light next to the p.m. flashes. If it is set for 7 a.m., the a.m. light flashes.
PROGRAMMING PORT
Allows qualified technicians external access for advanced operating modes, updating software, and troubleshooting.
CURReNT OUTLET WATER TEMPERATURE
The number following the C, P, or A is the current discharge water temperature as sensed by the discharge water temperature sensor.
M Button
The M button is used to access menus. To see the HELP menu, press and release the M button. For more information on the HELP menu, refer to this link.
UP & DOWN ARROW BUTTONS
When in the Operation and HELP menu, the up and down arrow buttons are used to scroll through the entries in the menu.
OPERATING STATUS MENU:
Press the up arrow to access the operating status. More information.
Outdoor Temperature - indicates current outdoor temperature.
Heat Call Status - indicates the current heat call status as determined by the room thermostat(s). The display shows the highest heat call value present.
Brick Core Charge Level - indicates the current percentage of heat stored in the brick core. CL: _ represents zero percent and CL:F represents a full core charge level.
Targeted Brick Core Charge Level - indicates the current percentage of brick core charge being targeted by the system. tL: _ represents a target level of zero percent and tL:F represents a full core charge target level.