Qmark QCH User Manual

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FILE#E21609

Nameplate

U Series

Fan Forced Ceiling

Mounted Heaters

Model No.

U1000
U1500
U2004
U2007

Catalog No.

QCH1101
QCH1151
QCH1202
QCH1207

Watts

1000
1500
2000
2000

Volts

120
120
240
277

Installation & Maintenance Instructio ns

Dear Owner,

Congratulations! Thank you for purchasing this new heater manufactured by Marley Engineered Prod­ucts. You have made a wise investment selecting the highest quality product in the heating industry. Please
carefully read the installation and maintenance directions shown in this manual. You should enjoy years
of efficient heating comfort with this product from Marley Engineered Products... the industry’s leader in
design, manufacturing, quality and service.

WARNING

Read Carefully - These instructions are written to help

you prevent difficulties that might arise during installation of
heaters. Studying the instructions first may save you con­siderable time and money later. Observe the following pro­cedures, and cut your installation time to a minimum.

1. To prevent electrical shock, disconnect all power coming to
heater at main service panel before wiring or servicing.

2. All wiring must be in accordance with the National and Local
Electrical Codes and the heater must be grounded as a pre­caution against possible electric shock.

3. Verify the power supply voltage coming to heater matches the
ratings printed on the heater nameplate before energizing.

4. Do not operate heater without grille installed.

5. Do not insert or allow foreign objects to enter any ventilation or
exhaust opening as this may cause an electric shock, fire,or
damage to the heater.

SAVE THESE INSTRUCTIONS

... The Employees of
Marley Engineered Products

6. To prevent a possible fire, do not block air intakes or exhaust
in any manner. Keep combustible materials, such as crates,
drapes, etc., away from heater.

7. A heater has hot and arcing or sparking parts inside. Do not
use it in areas where gasoline, paint, or flammable liquids are
stored.

8. This heater is intended for ceiling installation only, at least 6
feet off the floor. Do not install in walls, floor, or other loca­tions. Do not install closer than 12” to adjacent walls.

9. Use this heater only as described in this manual. Any other
use not recommended by the manufacturer may cause fire,
electric shock, or injury to persons.

10. This heater is not approved for use in hazardous locations as
described by the National Fire Protection Association (NFPA)
nor in corrosive atmospheres such as marine, green house, or
chemical storage areas.

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IMPORTANT

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WARNING

TO PREVENT HAZARD OF FIRE OR ELECTRICAL SHOCK, DO

OT INSTALL WITHOUT BACK BOX. BACK BOX MUST BE

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SECURELY MOUNTED TO BUILDING STRUCTURE. BUILD­ING STRUCTURE MUST BE CAPABLE OF SUPPORTING THE
HEATER AND ALL ACCESSORIES (APPROX. 11LBS).

CAUTION

FOR CEILING MOUNTING ONLY. DO NOT INSTALL HEATER CLOSER
THAN 6’(1830MM) TO THE FLOOR. DO NOT INSTALL CLOSER THAN
12”(305MM) TO ADJACENT WALL.

FAN DELAY NOTE:

A FAN DELAY IS STANDARD ON THIS HEATER. IN ORDER TO HAVE
THE FAN DELAY OPERATE CORRECTLY, SEPARATE WIRING IS RE­QUIRED BETWEEN THE HEATER AND THE WALL THERMOSTAT.

WARNING

HEATER MUST BE WIRED AS SHOWN IN WIRING DIAGRAM. SEE

FIG. 3. WIRING IN ANY OTHER MANNER MAY PREVENT HEATER
FROM OPERATING PROPERLY AND COULD LEAD TO PREMATURE
FAILURE OR A FIRE.

GENERAL

The heater is designed for recessed installation in 2” X 4” (50mm X
101mm) joist or larger ceiling section using the back box provided. The
heater may also be surface mounted by using the Surface Mounting
Frame. The heater is intended to be controlled by a single pole, wall
mounted thermostat (ordered separately). The heater may be wired with
standard building wire (60°C). (See Fan Delay Notice Above). Refer to
specification chart (see pg. 4) for correct supply voltage and wire size.

NOTE: The optimum mounting height for this heater is 8’ (2440mm) from
floor to bottom of back box. In any case do not install closer than 6’
(1830mm) from the floor, or closer than 12” (305mm) to adjacent walls.

6. Connect the supply cable ground wire to green ground screw pro­vided.

NOTE: Lead holes for a #8 sheet metal screw have been provided in the
sides of the back box. After the finished wall or ceiling has been put up,
drive a # 8(m4) sheet metal screw (recommended 1”) through the side of
the box not mounted to the joist. This will prevent the back box from
pulling out when installing the heater assembly. (See Figure 1)

INSTALLATION OF BACK BOX IN EXISTING CONSTRUCTION

1. Carefully mark and cut a hole measuring 9-3/8" (235mm) wide by 11­1/8" (283mm) long. One edge of the hole must be cut along the edge
of a joist.

2. Proceed to No. 1 through 6 (Installation of Back Box in New Construc­tion).

CAUTION

AN ELECTRICAL SHOCK, FIRE, ORWATER DAMAGECOULD RESULT
IF WIRING OR PIPING IS DAMAGED DURING CUTTING. MAKE SURE
ALL WIRING AND PIPING ARE CLEAR OF AREA BEFORE CUTTING.

INSTALLATION OF HEATER IN T-BAR CEILING
USING CATALOG NUMBER HTBF

1. Determine the desired location for the heater.

2. Remove heater from carton, remove front cover, heater assembly from
back box.

3. Remove T-Bar frame, envelope containing mounting screws from car­ton.

4. Mount the heater backbox to the HTBF kit frame using the four screws
provided. Refer to figure 1A.

5. Place the HTBF frame with heater backbox installed in ceiling framing
and secure in position. Secure the frame to the building structure as
necessary using appropriate wire to prevent the heater and frame from
falling.

INSTALLATION OF BACK BOX IN NEW CONSTRUCTION
NOTE: If the finished ceiling surface is already up, follow instructions for

“INSTALLATION OF BACK BOX IN EXISTING CONSTRUCTION”.

1. Determine which side of the back box is to be mounted against a joist
and bend the tabs at the rear corners out 90 degrees so that the back
box will be square with the joist after installation. (See Figure 1).

2. Remove one of the knockouts on socket side of the back box and in­stall a cable or conduit connector.

3. Position back box against side of joist and secure using nails or
screws as shown in Figure 1.

NOTE: The back box must be installed with the front edge flush with
the finished surface.

4. Run power supply cable through the connector, leaving about 8”
(203mm)of wire inside the box.

5. Run thermostat cable from wall thermostat to heater location leaving at
least 6” (153mm) of cable inside the box. (See Fan Delay Notice.)

ceiling joist

Figure 1

Figure 1A

6. Bring power supply cable to heater location. Remove the desired
knockout in backbox and install cable using an appropriate cable
clamp, leaving at least six inches (153mm) of wire in box for connec­tions.

NOTE: Power supply cable must enter backbox in location behind the
disconnect switch assembly.

7. Complete the installation by following steps 1 through 5 of the "Installa­tion and Wiring of Heater / Fan Assembly" section.

WARNING

Risk of Fire – Do not install heater closer than 12 inches (305mm) from any
wall.
Risk of Falling – The heater backbox must be securely mounted to the
building structure and the building structure must be capable of support­ing the heater with all accessories. The heater weight with accessories is
at least 18 lbs.

FIELD CONVERSION FOR LOWER WATTAGE RATING
NOTE: Refer to specification chart for lower wattage ratings which are

available.
To convert heater to lower wattage rating, completely remove red jumper

wire from both heating elements (See Figure 2). Discard this jumper. Be
sure remaining wires are securely connected.

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