KFS Series Submittal

Engineering Specifications
Transformer: Each furnace is equipped with a heavy duty low voltage
(40 VA) transformer for the thermostat control circuit.
Time Delay Sequencer: Actuates heating element banks to minimize
electrical surges in compliance with E.E.I. and N.E.M.A. standards.
Heating Elements: Quick heating, long life Ni-Chrome elements are
sized to provide proper watt density for maximum heat dissipation.
Terminal Block: For field wiring (optional special order) KFSTB Single
Strike Connection. Takes multiple circuits into a single feed.
Air Filter: Convenient access for replacement of standard 16” x 20” x 1”
filter. Do not use pleated filters.
Motor: Energy Saving, Long life, thermally protected, permanently
lubricated, direct drive ECM motor—no belts to adjust or slip.
This low noise, 3 speed motor is designed for use with air conditioning
capability as well as heating. Very quiet operating. 60 second fan delay.
Overcurrent Protection: 208 and 240 volt KFS models have 60 amp
circuit breakers.
Limit Control: Integral automatic high temperature limit control in
each heating element bank prevents the delivery of air at unsafe
temperatures. 20-35 KW models use a manual reset limit control to
completely shut the furnace off should an unsafe temperature occur.
Summer fan only operation. Fan can be run independently from heating.
Mobile Home approved.
Unique Fan Orifice: Louver directs air over all heating elements and
side walls evenly ensuring longer life performance.
Low Voltage Terminal Block: 24 Volt control screw terminals.
Approvals: cULus (E48864) USA and Canada
Contractor shall supply and install KFS ECO2S Series electric furnaces manufactured by King Electrical Mfg. Company. Furnaces shall be of the wattage
and voltage as indicated on the plans.
Electronic Furnace KF/KFS ECO2S Series
Air Flow Chart (For 20 to 34.5kW Units with 1/2HP ECM Motor)
0.1”WC
KF/KFS**20 20
KF/KFS**25 25
KF/KFS**30 30
KF/KFS**35 35
0.2”WC
0.3”WC
0.4”WC
0.5”WC 0.6”WC 0.7”WC 0.8”WC 0.9”WC 1.0”WC
(1) ** Represents the voltage, 20=208V, 24=240V, 48=480V. Voltage of the KF/KFS unit does not affect the data in this table.
(2) NR= Not Recommended, Temperature Rise is above maximum design parameter.
(3) The highlighted cells are the factory default torque setting for each model. The ECM motor has 5 field adjustable torque settings,
allowing for a wide range of design choices.
(4) Blower: 10” diameter, 8” wide
MODEL KW TORQUE CFM RISE CFM RISE CFM RISE CFM RISE CFM RISE CFM RISE CFM RISE CFM RISE CFM RISE CFM RISE
(F) (F) (F) (F)
15.5 1,258 - 1,262 - 1,193 - 1,132 - 1,054 - 910 - 834 - 821 - 705 -
19.0 1,466 - 1,419 - 1,300 - 1,285 - 1,218 - 1,180 - 1,015 - 979 - 934 -
22.5 1,575 - 1,570 - 1,564 - 1,363 - 1,347 - 1,284 - 1,256 - 1,200 - 1,152 -
26.0 1,690 - 1,679 - 1,640 - 1,546 - 1,472 - 1,430 - 1,378 - 1,358 - 1,315 -
30.0 1,771 - 1,766 - 1,723 - 1,728 - 1,569 - 1,542 - 1,522 - 1,487 - 1,415 -
15.5 1,258 - 1,262 - 1,193 - 1,132 - 1,054 - 910 - 834 - 821 - 705 NR
19.0 1,466 - 1,419 - 1,300 - 1,285 - 1,218 - 1,180 - 1,015 - 979 - 934 -
22.5 1,575 - 1,570 - 1,564 - 1,363 - 1,347 - 1,284 - 1,256 - 1,200 - 1,152 -
26.0 1,690 - 1,679 - 1,640 - 1,546 - 1,472 - 1,430 - 1,378 - 1,358 - 1,315 -
30.0 1,771 - 1,766 - 1,723 - 1,728 - 1,569 - 1,542 - 1,522 - 1,487 - 1,415 -
15.5 1,258 - 1,262 - 1,193 - 1,132 - 1,054 - 910 - 834 NR 821 NR 705 NR
19.0 1,466 - 1,419 - 1,300 - 1,285 - 1,218 - 1,180 - 1,015 - 979 - 934 -
22.5 1,575 - 1,570 - 1,564 - 1,363 - 1,347 - 1,284 - 1,256 - 1,200 - 1,152 -
26.0 1,690 - 1,679 - 1,640 - 1,546 - 1,472 - 1,430 - 1,378 - 1,358 - 1,315 -
30.0 1,771 - 1,766 - 1,723 - 1,728 - 1,569 - 1,542 - 1,522 - 1,487 - 1,415 -
15.5 1,258 - 1,262 - 1,193 - 1,132 - 1,054 - 910 NR 834 NR 821 NR 705 NR
19.0 1,466 - 1,419 - 1,300 - 1,285 - 1,218 - 1,180 - 1,015 - 979 NR 934 NR
22.5 1,575 - 1,570 - 1,564 - 1,363 - 1,347 - 1,284 - 1,256 - 1,200 - 1,152 -
26.0 1,690 - 1,679 - 1,640 - 1,546 - 1,472 - 1,430 - 1,378 - 1,358 - 1,315 -
30.0 1,771 - 1,766 - 1,723 - 1,728 - 1,569 - 1,542 - 1,522 - 1,487 - 1,415 -