Product Overview

DIMENSIONS
BACK BOX
(Rough-In Box)
(Front View)
(End View)
1
1
9-3/4
3
/8
3-3/4
QCH-SM
SURFACE
MOUNTING
FRAME
(Front View)
(Bottom View)
10-1/2
3-7/8
1-1/8
1
2
-
1
/
2
1-5/8
1-1/8
2-1/2
HIGH LIMIT
QCH-SM
(Side View)
HEATING
E
LEMENT
FAN CONTROL
M
OTOR & FAN
INNER FRAME
ASSEMBLY
(Back View)
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 copper-
brazed. 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.
Distributed By:
470 Beauty Spot Road East
Bennettsville, SC 29512