ARCHITECT’S & ENGINEER’S SPECIFICATIONS*

• The heating equipment shall include a ceiling mounted QCH electric automatic fan forced heater suitable for large area heating as manufactured by QMark, a Marley Engineered Products Brand, Bennettsville, SC. The heater shall be designed for ceiling surface or recessed mounting. Heaters shall be UL Listed.

• HEATER ASSEMBLY: The heater assembly, which fits in 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 of the non-glowing design consisting of 80/20 NiCh resistance wire enclosed in a steel sheath to which plate fins are copperbrazed.
  It shall be warranted for 5 years.

• FAN MOTOR: The fan motor shall be totally enclosed and permanently lubricated.
  FAN DELAY SWITCH: Fan control shall be of bi-metallic, snap-action type and shall activate fan after heating element reaches operating temperature. The fan shall continue to operate after the temperature is satisfied and until the heating element is cool.

• THERMAL CUTOUT: A thermal cutout shall be built into the system to shut off the heater in the event of overheating.

• DISCONNECT SWITCH: A double-pole single throw disconnect switch shall be factory installed for positive disconnect of power supply. It will be completely concealed behind the faceplate.

• BACK BOX: The back box shall be designed for duty as a recessed rough-in box in either masonry or frame installations and is also used with the surface mounting frame in surface
  mounting installations. The back box shall be 20-gauge galvanized steel and shall contain knockouts through which power leads are brought.

• FACEPLATE: The louvered faceplate shall be of commercial grade steel finished in Navajo White baked enamel. It will attach to the heating unit via snaps in the plastic trim pieces and shall have no exposed screw heads.

• THREE-PIECE DESIGN: The heater shall be made up of a back box, a heater assembly and a faceplate.

• SURFACE MOUNTING FRAME: The surface mounting frame, designed to allow full surface mounting, shall be commercial grade cold-rolled steel, phosphatized, then electrostatically painted Navajo White by a baked enamel process.

• *QMark reserves the right to change specifications without prior notice.

Qmark QCH Installation Instructions Qmark QCH Bulletin Qmark QCH Submittal Replacement Parts

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