Submittal Sheet

QCH SERIES
470 Beauty Spot Rd. E, Bennettsville, SC 29512
DIMENSIONS
ARCHITECT'S & ENGINEER'S SPECIFICATIONS *
The heating equipment shall include an electric automatic QCH Series fan-
forced air heater suitable for small area heating as manufactured by QMark
Electric, A Marley Engineered Products Brand, Bennettsville, SC. Heaters
shall be UL Listed. The heater shall be designed for surface or recessed
ceiling mounting. For surface mounting, a QMark SRA-SM surface
mounting frame shall be used.
BACK BOX: The back box shall be designed for duty as a recessed rough-
in box in either masonry or frame construction, and also when mounting
directly to the surface of the finished ceiling in surface mounting
installations. The back box shall be 20-gauge galvanized steel and shall
contain knockouts through which field wiring leads are brought.
INNER FRAME ASSEMBLY: The inner frame assembly shall consist of a
20-gauge steel chassis on which are mounted the heating element, fan
motor and blade, fan control and thermal cutout. The inner frame assembly
shall be completely pre-wired.
HEATING ELEMENT: The heating element shall be guaranteed for five
years and shall be of non-glowing design consisting of a special 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.
MOTOR AND CONTROLS: The fan motor shall be impedance protected,
permanently lubricated and with totally enclosed rotor. Fan control shall be
bi-metallic, snap-action type and shall activate fan after heating element
reaches operating temperature, and continue to operate the fan after the
thermostat is satisfied and until all heated air has been discharged.
Thermal cutout shall be bi-metallic, snap-action type designed to shut off
heater in the event of overheating and reactivate the heater when
temperatures return to normal.
DISCONNECT SWITCH: A factory installed double pole single throw
disconnect switch shall be provided for positive disconnect of power supply.
It will be completely concealed behind the front cover.
FRONT COVER: The louvered front cover shall be of commercial grade
steel finished in White baked enamel. It will attach to the fan deck via
snaps in the plastic trim pieces and shall have no exposed screw heads.
FINISH; All sheet metal parts, except the front cover and galvanized back
box shall be phosphatized, then completely painted by a baked enamel
painting process.
* QMark reserves the right to change specifications without prior notice.
WIRING DIAGRAM
Printed in U.S.A.
SRA-SM
SURFACE
MOUNTING
FRAME
(Front View)
BACK BOX
(Rough-In Box)
(Front View)
SRA-SM
(Side View)
MOTOR &
FAN
FAN
CONTROL
HIGH
LIMIT
HEATING
ELEMENT
INNER FRAME
ASSEMBLY
(Back View)
(Bottom View)
(End View)
10-1/2
12-1/2
1-5/8
1-1/8
11
9-3/4
3/8
3-3/4
3-7/8
2-1/2
1-1/8
9
POWER LEADS
(BLACK & WHITE)
FAN DELAY NOTE
A FAN DELAY IS STANDARD ON ALL UNITS.
IN ORDER TO HAVE THE FAN DELAY
OPERATE CORRECTLY, SEPARATE WIRING
IS REQUIRED BETWEEN THE HEATER AND
THE WALL THERMOSTAT.
REMOVE “RED JUMPER” FOR HALF HEAT.
DISCONNECT
SWITCH ASSY.
AUTO
HIGH
LIMIT
FAN
DELAY
CONTROL
FAN MOTOR
ELEMENTS
RED JUMPER
(REMOVE FOR HALF WATTAGE)
THERMOSTAT LEADS - SINGLE POLE ONLY
(RED & RED)
CATALOG
NUMBER VOLTS WATTS BTU / HR. AMPS.
QCH1101F
120
1000/500 3413
8.3/4.7
QCH1151F
120 1500/750 5120
12.5/6.3
QCH1202F
240/208
2000/1500
1000/750
6826/5119
8.4/7.2
4.2/3.6
QCH1207F
277/240
2000/1500
1000/750
6826/5119
7.2/6.3
3.6/3.1
SELECTION CHART
CATALOG
NUMBER DESCRIPTION
QCH-SM Surface Mounting Sleeve
QCHS1 1” Semi-Recessed Frame
QCHS2 2” Semi-Recessed Frame
QCHTBF T-Bar Frame Kit
* Factory wired for full wattage, field convertible to half wattage.
ACCESSORIES
MOUNTING LIMITATIONS
Heaters are designed for surface or
recessed mounting in ceiling. They must be
mounted a minimum of 6’ from floor and 24’’
from any adjacent wall or obstruction.
NOTE: In order to have the fan delay
operate correctly, three wires are required
between the heater and the wall thermostat.
(See figure 1).
Air movement
Temp range
65 CFM
45-96
o
F