Qmark ST User Manual [en, es, fr]

ST4X Series

Slope Top Convector

Installation, Operation & Maintenance Instructions

EMA 4

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CAUTION

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IMPORTANT INSTRUCTIONS

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WARNING

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FILE # 0026740A.

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CAUTION - TO REDUCE RISK OF FIRE AND ELECTRIC
SHOCK OR INJURY TO PERSONS, OBSERVE THE
FOLLOWING:

1. Read all instructions carefully before using this heater. This
instruction sheet contains vital information for the proper
installation, use, and efficient operation of the heater.
Carefully read the manual before installation , operation or
cleaning of the heater. Failure to adhere to the instructions
could result in fire, electric shock, death, serious personal
injury, or property damage.

2. It is recommended that drapery be kept a minimum of four
(4”) inches from the top or front of heater.

3. This heater is not intended for residential use.

4. The heater is hot when in use. To avoid burns, do not let
bare skin touch hot surfaces.

5. A heater has hot and arcing or sparking parts inside. To
reduce the risk of fire, do not store or use gasoline or other
flammable vapors and liquids in the vicinity of the heater.

SAVE THESE INSTRUCTIONS

6. To prevent a possible fire, do not block air intakes or
exhaust in any manner. Do not use on soft surfaces, like a
bed, where openings may become blocked.

7. To reduce the possibility of electric shock, it is recommend­ed the power to the heater be disconnected during wash
down.

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

9. Supply voltage must be the same as heater voltage. Check
heater nameplate and supply voltage before energizing.

10. Supply wiring must be rated minimum 75ºC. Use copper
wire only.

11. 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.

INSTALLATION INSTRUCTIONS

TO REDUCE THE RISK OF FIRE AND ELECTRIC SHOCK
OR INJURY TO PERSONS, OBSERVE THE FOLLOWING:

1. Serious injury or death could result from electric shock.
Make sure electrical power supply circuit coming to heater
are disconnected at main disconnect or service panel
before installing this heater.

2. Wiring procedures and connections must be in accordance
with the National Electrical Code (NEC) and local codes.
Refer to Wiring Diagram on heater and Figure 2. Make sure
all electrical connections are tight to prevent possible over­heating. Use Copper Supply Wire Only.

3. Verify the electrical power supply voltage matches the volt­age rating as printed on the heater nameplate.

CAUTION - Never connect a heater to a voltage greater than
the nameplate voltage as this will damage the heater and
could cause a fire.

4. Do not install the heater against combustible low-density
cellulose fiberboard surfaces, against or below vinyl wall
coverings, or below any materials that may be damaged by
heat such as vinyl or plastic blinds, curtains, etc.

5. Do not install heater below an electrical convenience recep­tacle (outlet).

CAUTION

6.
Electrical Cords (including telephone and computer cables),
Drapes, and Other Furnishings Away From Heater. For effi­cient and safe operation, we recommend maintaining a min­imum of 6 inches (152 mm) clearance in front of the heater
at all times. See Clearances Chart for minimum clearance
requirements.

7. To reduce the risk of fire, do not store or use gasoline or
other flammable vapors or liquids in the vicinity of the
heater.

8. Do not install heater upside down or in any position other
than as shown in this manual.

9. Do not recess heater in wall or install heater inside any type
enclosure as this will cause heater to overheat and could
create a hazard.

10. When mounting heater, use care when drilling mounting
holes and mounting heater to building structure to avoid
damaging internal heater components. Be sure to loosen
mounting screws ½ turn to allow for expansion and con­traction.

11. Do not remove or bypass the safety limit control(s) as this
could allow heater to become a fire hazard – see heater
wiring diagram supplied with heater and Figure 2.

12. Do not allow object to be placed on top of heater as they
may be damaged or create a fire hazard.

13. Before energizing, make sure front cover is properly
attached to back housing and all screws are installed as
intended. Do not operate heater without front cover
installed.

14. This heater is not approved for use in hazardous or corro­sive environments such as marine, green house, or chemi­cal storage areas.

15. Optional built-in controls are not compatible with the NEMA
4X Series slope top convectors.

– Heater Operates at High Temperatures. Keep

Clearance Information

IMPORTANT NOTE:
heater must have adequate airflow. Therefore, locate heater so
that it is not likely to be blocked or damaged and do not allow
anything to be placed against or near the front of heater. It is
recommended that at least 6 inches (152 mm) clearance be
maintained in front of the heater.

For safe and efficient operation, maintain at least the following
minimum clearances:

Bottom of Heater to Finished Floor:

- May be installed on floor. However, for best performance,
install bottom of heater approximately 3 inches (76 mm) off
floor.

Top of Heater to Bottom of Nearest Drapes or Window Sill
Above Heater:

- Minimum 6 inches (152 mm)

IMPORTANT NOTE:
as vinyl blinds) may become damaged by the heated air from
the heater and should not be installed above the heater.

Front of Heater to Full Length Drapes in Front of Heater:

- Minimum between bottom of drapes and floor – 2-1/2 inches
(64 mm)

- Minimum between top of drapes and ceiling – 1/2 inch
(13 mm)

- Minimum between front of heater and nearest fold of drape –
3 inches (76 mm)

For efficient and safe operation, the

Certain fabrics and vinyl materials (such

Mounting and Wiring

NOTE:
National Electric Code and local codes using at least 75°C type
RH, THW or equivalent insulated wire. See chart (Important
Information) for amp loads.

NOTE:
Each heater must be mounted individually.

1. Locate on vertical wall with length of heater positioned hori-

2. When selecting a mounting location, refer to the

3. Remove front cover by removing screws at bottom of cover

4. Mount the rear panel assembly of the heater to the wall

5. Open wiring box cover by loosening each latch screw, sliding

6. Make the proper connections following the wiring diagram

7. Install the front cover by hooking the top edge of the cover

8. Close the wiring box cover by replacing the latches over the

2

Electrical wiring is to be sized in accordance with

This heater is not capable of being mounted in groups.

zontally. This heater must be mounted above finished floor­ing. Do not allow carpeting or other objects to block the
recessed drain ports at the base of the heater.

Clearance

Information

and lifting cover out and up.

using the 3/16” (4.7mm) diameter mounting holes. See
dimension chart for mounting hole quantity (mounting
screws and wall anchors are not supplied).

the latches sideways, and rotating them off of the lip of the
wiring box cover.

(Fig 2).
a. Wire must be routed from the floor or wall to the heater

wiring box using the appropriate conduit. NEMA 4X con­duit and hub are required for NEMA 4X applications.

b. Grounding connector must be connected to the green

ground wire.

over the top edge of rear panel and attaching the bottom lip of
the cover to the rear panel using screws removed in step 3.

lip of the wiring box cover and tightening the latch screws.

for appropriate mounting limitations.

AUTO RESET
THERMAL LIMIT

(N)

GL2L1

ELEMENT

Dimensions

A

4”

Figure 1

OPERATING INSTRUCTIONS

1. This heater must be properly installed before it is used.

2. When using an external thermostat, refer to the installation
and operating instructions provided with thermostat.

3. On initial start up and check out, before heater is energized,
rotate thermostat shaft to the full counter-clockwise (lowest
heat) setting. Connect power to the heater and check to ver­ify the heater is not heating. If heating, disconnect and
check wiring.

4. Rotate thermostat shaft to the full clockwise (CW) (max heat)
setting and allow heater to operate for at least 5 minutes and
verify it is heating.

5. Allow heater to operate until room ambient reaches desired
comfort level and then slowly rotate thermostat shaft counter­clockwise (CCW) until you hear or feel a click. This will pro­vide a set point to allow the thermostat to cycle the heater on
and off to maintain this approximate temperature. Some
slight adjustments may be necessary to fine tune the heater
to provide the most desired room comfort. To increase time
heater stays on and increase the room temperature, slightly
rotate the thermostat in the CW direction. Likewise, to
reduce the room temperature, slightly rotate the thermostat
in the CCW direction.

Figure 2. Wiring Diagram

3”

Wattage Dimension “A” (Length)
500 28” (709mm)
750 36” (912mm)
1000 48” (1216mm)

10”

1250 60” (1520mm)
1500 72” (1824mm)
2000 96” (2432mm)
2500 120” (3040mm)

MAINTENANCE INSTRUCTIONS

For efficient and safe operation and to extend the life of the
heaters, they should be cleaned and inspected for damage at
least annually (preferably at the beginning of the heater season)
or more often in dirty environments. Other than cleaning, your
heaters require no other preventative maintenance. The user
can perform some basic cleaning of the heater. All other servic­ing is to be done by qualified service personnel.

SERIOUS INJURY OR DEATH COULD RESULT FROM
ELECTRIC SHOCK. MAKE SURE ELECTRICAL POWER
SUPPLY CIRCUIT COMING TO HEATER IS DISCONNECT­ED AT MAIN DISCONNECT OR SERVICE PANEL BEFORE
CLEANING OR SERVICING THIS HEATER. ALLOW
HEATER TO COOL BEFORE CLEANING TO PREVENT A
POSSIBLE BURN.

NOTE:
HEATER. BE SURE ALL POWER IS DISCONNECTED TO
HEATER BEFORE CLEANING OR SERVICING.

To Clean Heater

1. Heater cabinet may be cleaned using a damp cloth to

2. A vacuum cleaner and /or compressed air may be used to

MORE THAN ONE POWER SOURCE MAY ENTER

remove dust that may have accumulated on surfaces. Do
not use harsh cleaners and waxes on surfaces since these
could damage the finish or discolor in use.

remove dust and lint that may have accumulated inside
heater around element fins. If heater must be dissembled for
cleaning, removed the screws securing front cover and
remove front cover to allow for access to inside. Use care
when cleaning element fins to avoiding damaging fins.

FINS ARE SHARP AND MAY CAUSE CUTS SO AVOID
CONTACT

3. After cleaning and servicing, replace front cover and screws
removed making sure cover is properly secured at top and
bottom.

4. Energize heater and check for correct operation.

3

TO REPAINT

The baked enamel finish was chosen to blend with interior
decor. If you wish to repaint the heaters, use high quality
household enamel. No primer is necessary. However, light
sanding is recommended. Do not use rubber base paint. Paint
heater front cover only. Do not paint heating element or
protector.

IMPORTANT INFORMATION

Catalog

Number*

ST4X02500

ST4X03750
ST4X041000
ST4X051250
ST4X061500
ST4X082000
ST4X102500

Length

28”
36”
48”
60”
72”
96”

102”

Nominal

Watt/Ft.

250
250
250
250
250
250
250

Total Heating

Capacity

Watts

500

750
1000
1250
1500
2000
2500

1706
2560
3412
4266
5120
6824
8532

120V BTU/Hr.

4.2

6.3

8.3

10.4

12.5

16.7

20.8

Amperage

208V 240V 277V 347V 480V

2.4

3.6

4.8

6.0

7.2

9.6

12.0

2.1

3.1

4.2

5.2

6.3

8.3

10.4

1.8

2.7

3.6

4.5

5.4

7.2

9.0

1.4

2.2

2.9

3.6

4.3

5.8

7.2

1.0

1.6

2.1

2.6

3.1

4.2

5.2

600V

.8

1.3

1.7

2.1

2.5

3.3

4.2

Ship

Wt.

Lbs.

17 lbs
22 lbs
27 lbs
33 lbs
38 lbs
45 lbs
50 lbs

*Catalog number shown in above table will be followed by a three-digit suffix indicating voltage and phase
121 = 120V/1Ø 271 = 277V/1Ø
201 = 208V/1Ø 341 = 347V/1Ø
241 = 240V/1Ø 601 = 600V/1Ø

LIMITED WARRANTY

All products manufactured by Marley Engineered Products are warranted against defects in workmanship and materials for one year from date of installation, except
heating elements which are warranted against defects in workmanship and materials for five years from date of installation. This warranty does not apply to damage from
accident, misuse, or alteration; nor where the connected voltage is more than 5% above the nameplate voltage; nor to equipment improperly installed or wired or
maintained in violation of the product’s installation instructions. All claims for warranty work must be accompanied by proof of the date of installation.

The customer shall be responsible for all costs incurred in the removal or reinstallation of products, including labor costs, and shipping costs incurred to return products
to Marley Engineered Products Service Center. Within the limitations of this warranty, inoperative units should be returned to the nearest Marley authorized service cen­ter or the Marley Engineered Products Service Center, and we will repair or replace, at our option, at no charge to you with return freight paid by Marley. It is agreed that
such repair or replacement is the exclusive remedy available from Marley Engineered Products.

THE ABOVE WARRANTIES ARE IN LIEU OF ALL OTHER WARRANTIES EXPRESSED OR IMPLIED, AND ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE WHICH EXCEED THE AFORESAID EXPRESSED WARRANTIES ARE HEREBY DISCLAIMED AND EXCLUDED FROM
THIS AGREEMENT. MARLEY ENGINEERED PRODUCTS SHALL NOT BE LIABLE FOR CONSEQUENTIAL DAMAGES ARISING WITH RESPECT TO THE
PRODUCT, WHETHER BASED UPON NEGLIGENCE, TORT, STRICT LIABILITY, OR CONTRACT.

Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above exclusion or limitation may not apply to you. This warranty gives
you specific legal rights, and you may also have other rights which vary from state to state.

For the address of your nearest authorized service center, contact Marley Engineered Products in Bennettsville, SC, at 1-800-642-4328. Merchandise returned to the fac­tory must be accompanied by a return authorization and service identification tag, both available from Marley Engineered Products. When requesting return authorization,
include all catalog numbers shown on the products.

HOW TO OBTAIN WARRANTY SERVICE AND
WARRANTY PARTS PLUS GENERAL INFORMATION

1. Warranty Service or Parts

2. Purchase Replacement Parts

3. General Product Information

Note:

When obtaining service always have the following:

1. Model number of the product

2. Date of manufacture

3. Part number or description

Part No. 5200-2595-001

1-800-642-4328
1-800-654-3545
www.marleymep.com

ECR38672

12/10

470 Beauty Spot Rd. East
Bennettsville, SC 29512 USA