Manual

The heating equipment shall include an electric automatic LFK Series fan-forced heater suitable for large area heating as
manufactured by QMark, a Marley Engineered Products Brand, Bennettsville, SC. Heaters shall be UL & cUL Listed.
The heater shall be designed for wall recess or surface mounting. For surface mounting, a QMark LFKSM surface mounting
frame shall be used. For semi-recessed applications a QMark LFKS-1 or LFKS-2 shall be used.
HEATER ASSEMBLY: The heater assembly, which fits into the back box, shall consist of a fan panel upon which is mounted all
of the operational parts of the heater.
HEATING ELEMENT: The heating element shall be guaranteed for five years and shall be of the non-glowing design consisting
of 80/20 Ni-Ch resistance wire enclosed in a steel sheath to which steel plate fins are brazed. The element shall cover the entire
air discharge area to ensure uniform heating of all discharge air.
FAN AND FAN MOTOR: The fan shall be five-bladed aluminum. The fan motor shall be totally enclosed.
FAN DELAY SWITCH: Fan delay shall be bi-metallic, snap-action type and shall activate fan after heating element reaches
operating temperature and continue to operate until the heating element is cool.
THERMOSTAT: Double pole thermostat shall be of the bi-metallic, snap-action type with enclosed contacts.
THERMAL CUTOUT: A thermal cutout shall be built into the system to shut off the heater in the event of overheating.
BACK BOX: The back box shall be designed for duty as a recessed rough-in box in either masonry or frame installations. The
back box shall be commercial grade galvanized steel and shall contain knockouts through which power leads are brought.
FRONT COVER: The louvered front cover shall be of commercial grade steel finished in White powder coat.
FINISH: All sheet metal parts, except the back box shall be phosphatized, then completely painted by a powder coat paint
process.
LFK SERIES
470 Beauty Spot Rd. E, Bennettsville SC 29512
+
+
14-5/8"
1-1/4"
1-5/8"
1-3/8"
1-1/2"
19-1/8"
15-3/4"
3-7/8"
1-1/4"
18-1/4"
FILE # E21609
ACCESSORIES
CAT. NO. DESCRIPTION
LFKSM Surface mounting frame for surface installations.
Painted to match heater decor. 3-13/16” deep.
LFKS-1 1” deep surface mounting frame for semi-
recessed installation.
LFKS-2 2” deep surface mounting frame for semi-
recessed installation.
LFK-SFC 14 gauge security front cover.
MOUNTING LIMITATIONS
Do not install heater closer than 8” from floor
or adjacent wall surface, behind towel rack or
door, upside down or side up, in floor, ceiling
or closet.
SELECTION CHART
CATALOG NO. VOLTS* WATTS BTU/HR. AMPS
LFK151 120 1500 5120 12.5
LFK204 240/208 2000/1500 6,826/5,120 8.3/7.2
LFK304 240 3000 10,239 12.5
LFK404 240/208 4000/3000 13,652/10,239 16.7/14.4
LFK484 240/208 4800/3600 16,382/12,287 20.0/17.3
*Single Phase, 60 Hz. A.C.
Architect’s and Engineer’s Specifications