QTS Owners Manual

ARCHITECT’S & ENGINEER’S SPECIFICATIONS*
The heating equipment shall include an electric QTS Series
fan-forced air heater suitable for installing in toe space
areas under cabinets or stairs as manufactured by QMark, A
Marley Engineered Products Brand, Bennettsville, SC.
Heaters shall be UL Listed and C-UL Listed.
BACK BOX: The back box shall be commercial grade
galvanized steel and shall contain knock outs through which
field wiring leads enter the box. A ground wire pigtail lead
shall be attached to the back box.
INNER FRAME ASSEMBLY: The inner frame assembly shall
consist of a commercial grade galvanized steel chassis on
which are mounted the heating element, fan motor and
tangential blower, and over temperature protectors. The
inner frame assembly shall be completely prewired with a
plug connection for power wiring . Pigtail leads are provided
for thermostat wiring. The inner frame assembly shall lock
into the back box without fasteners.
HEATING ELEMENT: The heating element shall be
guaranteed for five years and shall be of non-glowing design
consisting of a 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. The wattage output of
the unit shall be adjustable by removing a jumper wire.
MOTOR AND CONTROLS: The fan motor shall be
impedance protected and permanently lubricated. An
optional single pole thermostat accessory shall be specified
where the unit will not utilize a single pole wall thermostat.
The over temperature protector shall be bi-metallic, snap-
action type designed to shut off heater in the event of over-
heating. A pilot light shall be provided that will illuminate if
the over temperature protector operates. A thermal fuse
shall provide secondary thermal cut-out for added safety.
FRONT COVER: The front cover shall be of commercial
grade steel finished in baked enamel. It will attach to the
back box with two screws.
* QMark reserves the right to change specifications without notice
DIMENSIONS (IN INCHES)
Thermostat range
45° to 85° F
MOUNTING LIMITATIONS
Do not install heater behind towel rack,
behind door, in floor, in closet, in ceiling, or
where air flow may be obstructed.
470 Beauty Spot Road E., Bennettsville, SC 29512
15.350”
Grille
Back Box Front View
Back Box Side View
15”
3-5/8”
3-1/2”
8-7/8”
3/4”
14-1/8”
Knock-
outs
Back Box
Top View
(2)
1-1/2”
8-7/8”
15”
3-1/2”
CATALOG NO. VOLTS WATTS BTU/HR AMPS THERMOSTAT
QTS-1500T 120 1500/750 5120/2560 12.5/6.3 A
QTS-1504T 240 1500/750 5120/2560 6.3/3.1 A
208 1125/564 3840/1920 5.4/2.7 A
QTS-1100 120 1125/562 3840/1920 9.4/4.7 B
QTS1104 240 1125/562 3840/1920 4.7/2.3 B
QTS1104 208 844/421 2880/1437 4.1/2.0 B
ACCESSORIES
QTS-TSP Single pole thermostat kit for field installation in TS-1100 or TS-1104 heater, 25A@ 120-240 VAC
45° to 85°F range.
QTS-AG Grille - 3 1/2”H x 23-3/8”W
A - Factory built-in single pole. B - Utilize optional wall thermostat or TS-TSP accessory.
WIRING DIAGRAM
L1
L2 or N
SOCKET PLUG
GND
Thermal
Fuse
240V-Black
120V-White
Fan
Motor
Delay
Resistor
Black
Blue
Built-In Single-Pole
Thermostat
Blue
Red
Jumper
Rear Coil
Front Coil
Light
Auto
Reset
Limit
QTS1504T, QTS1500T, QTS1104 (with TS-TS
accessory), QTS1100 (with TS-TSP accessory)
Motor
L1
GND
L2 or N
SOCKET PLUG
Remote double-pole wall thermostat
Temperature
cycled pole
This lead supplies the
motor and must not be
cycled by the thermostat
Manual On-Off pole
Single-pole built-in
thermostat (low or
off position)
Black
Blue
Blue
Thermal
Fuse
Red
Jumper
Rear Element
Front Element
Fan
Delay
Motor
Auto
Reset
Limit
Light
240V-Black
120V-White
A
SEE NOTE BELOW
THIS DIAGRAM