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OWNER'S MANUAL Room Units EXT Series C C C C C LISTED LISTED LISTED LISTED LISTED S Series Models: 212, 312, 412, 512 & 612 U.S. Pat. #5042081 Can. Pat. #1293359...
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Electric Thermal Storage has been used in the United States for over 20 years. Today, Steffes is known as the leader in this technology. Not only are we setting the industry standards for quality; but, we are also working closely with power companies to ensure comfort, safety, reliability, service, and support needs are being met.
1. GENERAL INFORMATION Steffes ETS room heating units utilize off-peak electricity available during those times of the day or night when the power company can supply you with electricity more economically. By using this off-peak electricity for heating, the power company may offer you a special incentive such as a reduced electric rate, an off-peak heating rate, a time-of-use (TOU) rate, or monthly credits on your heating bill.
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.
The EXT series can be configured in many ways. Due to the wide variety of setup methods and options, it may be necessary to consult with your sales representative for the operation instructions of your heating system. Several control devices can be used for core charging. Different combinations of these devices will provide for optimal unit function based upon utility needs, home characteristics, and installation requirements.
To minimize the black residue build up, clean the outer surface of the heater on an annual basis or as needed. Wash the cabinet only when cool with any liquid cleaner. Do not use scouring powders or furniture polish. Steffes ETS recommends using "Soft Scrub with Bleach"...
3. INSTALLATION A. PLACEMENT Room units can normally be placed on standard flooring systems with any type of covering, i.e., wood, carpet, linoleum; but, heater weight must be considered. If in doubt, consult a building contractor or an architect. (See Table 3 for weight and physical dimensions of unit being installed.) Room units are equipped with adjustable leveling legs or a security base.
Attach 1 3/4" x 1 5/8" wall support clips (31) to upper back side of unit using #8 x 1/2" sheet metal screws provided in hardware kit. Use the carriage bolts to secure the room heating unit to the wall support bracket.
Refer to Table 3 for the total number of bricks required in model being installed. All bricks for the Steffes ETS room units are identical. One side of the brick is indented to accommodate the factory installed heating elements. Bricks are inserted in rows four deep and two high.
Steffes low voltage thermostat item #1300002 which provides low voltage control of fan operation; however, low voltage contact is required for element control. Steffes thermostat, item #1300007 has a built in clock which provides low voltage control of element charging and fan operation with no other element control device required. On S series...
2. The field connection wire size guide reflects only the code inter- #6 AWG 11.5 13.2 pretation of Steffes ETS. It is the Use copper wire rated at 75 C minimum, only. responsibility of the installer to follow all applicable codes and regulations for the installation.
TYPICAL SYSTEM WIRING DIAGRAMS Connections shown are for 230 VAC fans. See Unit Identification Label on lower right side panel of unit for proper fan and element voltages. (Refer to the Face Plate Diagrams to determine which circuit board your heater incorporates.) S Series - Automatic Charge Control S Series - Manual Charge Control FIGURE 8...
TYPICAL SYSTEM WIRING DIAGRAMS CONTINUED... Connections shown are for 230 VAC fans. See Unit Identification Label on lower right side panel of unit for proper fan and element voltages. (Refer to the Face Plate Diagrams to determine which circuit board your heater incorporates.) EXT Series - Automatic or Manual Charge Control (shown with multi-mode circuit board) FIGURE 11...
UNIT WIRING DIAGRAMS - S SERIES CONTINUED. . . Connections shown are for 230 VAC fans - See Unit Identification Label on lower right side panel of unit for proper fan and element voltages. (Refer to the Face Plate Diagrams to determine which circuit board your heater incorporates.) Models: 512S - 612S FIGURE 14 UNIT WIRING DIAGRAMS - EXT SERIES...
UNIT WIRING DIAGRAMS - EXT SERIES CONTINUED . . . Connections shown are for 230 VAC fans. See Unit Identification Label on lower right side panel of unit for proper fan and element voltages. (Refer to the Face Plate Diagrams to determine which circuit board your heater incorporates.) Models: 212EXT - 312EXT (shown with multi-mode circuit board) FIGURE 16...
UNIT WIRING DIAGRAMS - EXT SERIES CONTINUED. . . Connections shown are for 230 VAC fans. See Unit Identification Label on lower right side panel of unit for proper fan and element voltages. (Refer to the Face Plate Diagrams to determine which circuit board your heater incorporates.) Model: 412EXT (shown with two-mode circuit board) FIGURE 18...
CIRCUIT BOARD FACE PLATES - EXT SERIES (NOTE: When reading the Typical System Wiring Diagrams and Unit Wiring Diagrams, use these skematics to determine which circuit board your heater incorporates.) TWO-MODE MULTI-MODE VARIABLE CHARGE FIGURE 20 FIGURE 21 FIGURE 22 Z Z Z Z Z ~ ~ ~ ~ ~ OMFOR...
F. ROOM UNIT TROUBLESHOOTING GUIDES Model: S Series Only Function: Air Delivery Problem: Fan(s) do not operate. Before starting any procedures listed below, check room thermostat and circuit breaker settings. Note: For cross reference to number coded components, see figure 7. Set wall thermostat to high stop position.
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Repair or replace fan assembly (47). Install damper clearancing Check unit for proper bracket, Steffes ETS item amperage draw. #1140209 If problem persists, replace fan high limit switch (56). NOTE: To test the bimetallic coil assembly, it must be completely cold.
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Model: S Series Only Function: Core Charging Problem: Unit will not charge. Before starting any procedures listed below, check room thermostat and circuit breaker settings. Note: For cross reference to number coded components, see figure 7. VOLTAGE Check for line voltage between L1 and L2 PRESENT terminal block positions (24).
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Model: S Series Only Function: Core Charging Problem: Improper Charging Before starting any procedures listed below, check room thermostat and circuit breaker settings. Note: For cross reference to number coded components, see figure 7. Unit charges improperly. UNIT OVERCHARGES UNIT UNIT (With manual CHARGES...
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FOR A PARTICULAR PURPOSE. The buyer assumes all risk and liability whatsoever resulting from the use of this heating appliance. In no event shall Steffes be liable to purchaser for any indirect, special or consequential damages or lost profits. This Limited Warranty contains the complete and exclusive statement of Steffes’ obligations with respect to the heating appliance and any parts thereof.
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