Steffes 612EXT Owner & Installers Manual - Manual (Page 5)

S SERIES
•Space Heating
Heating is accomplished both radiantly and by thermostatically controlled fans. Radiant heat is the heat
given off from the warm room unit cabinet. If the radiant heat is not sufficient to satisfy the room's heat
requirements, the wall mounted room thermostat will automatically cycle the unit fan(s), circulating air
through the brick core and back into the room to maintain a constant temperature. The wiring configura-
tion of fan(s) and elements allow fan cycling regardless of peak conditions.
•Core Charging
With manual operation, the homeowner regulates the amount of heat to be stored in the brick core. The
adjustable charge control knob has four marked positions: OFF, 1, 2 and 3.
OFF position is used when no heat storage is required. Position 1 is normally used during late fall and
early spring. Positions 2 and 3 will be used during most of the winter heating season depending upon
temperature extremes and owner preference. The knob may be set at any point between marked positions
and still allow the unit to charge.
With the addition of the automatic charge control option, core temperature is automatically regulated in
relation to outdoor air temperature. For automatic charge regulation, the charge control knob should be set
on position 3 to allow the unit to charge to the level deemed necessary by the automatic charge controller's
outdoor air sensor. If no charge is required, the charge control knob should be set to OFF position. If
automatic charge control is desired, order Steffes automatic charge controller, item #1301000 if utility
switch closes to charge. Order item #1301001 if utility switch opens to charge. Consult with your electric
utility as to which method they use. Either controller can control up to twenty-five (25) units.
EXT SERIES
•Space Heating
Heating is accomplished both radiantly and by thermostatically
controlled fans. Radiant heat is the heat given off by the warm
room unit cabinet. If the radiant heat is not sufficient to satisfy
the rooms heat requirements, the on-board room temperature
thermostat located on the front panel of the unit will automati-
cally cycle the unit's fan(s), circulating air through the ceramic
brick core and back into the room to maintain a constant
temperature. In installations where the heater is not the sole
source of heat for the home, the unit's fan(s) may be locked out
during some modes of operation. This lock-out allows the unit
to fully utilize it's storage capacity, reduce installation costs,
and obtain the highest efficiency possible.
•Core Charging
EXT FACE PLATE
FIGURE 1
~ C ~ C ~ C ~ C ~ C
OMFOR OMFOR OMFOR OMFOR OMFORT T T T T
Z Z Z Z Z
O O O O ONE NE NE NE NE
~ ~ ~ ~ ~
55 55 55 55 55 85 85 85 85 85
HEA HEA HEA HEA HEAT T T T T
STORA STORA STORA STORA STORAGE GE GE GE GE
CHARGE CHARGE CHARGE CHARGE CHARGE
LEVEL LEVEL LEVEL LEVEL LEVEL
O O O O ON N N N N
OFF OFF OFF OFF OFF
HIGH HIGH HIGH HIGH HIGH
LO LO LO LO LOW/A W/A W/A W/A W/AUTO UTO UTO UTO UTO
MED MED MED MED MED
CHARGING CHARGING CHARGING CHARGING CHARGING OFF-PEAK OFF-PEAK OFF-PEAK OFF-PEAK OFF-PEAK O O O O ON-PEAK N-PEAK N-PEAK N-PEAK N-PEAK