U
UNPACKING HEATER
Check heater to make sure it has not been damaged in ship-
ping. Do not install or attempt to operate the heater if damaged.
Return to place of purchase or file claim with freight carrier.
INSTALLATION INSTRUCTIONS
Minimum Clearances
Heater to Floor: heater may be mounted directly on finished
floor or, if desired, above floor (such as above the baseboard).
Up to 3/4 inch (19 mm) of carpeting may be installed up to and
around heater as long as it does not obstruct the air flow.
Heater to Drapery: do not install heater where curtains or drap-
ery will contact the heater. See Fig. 2 for required minimum
clearances.
Important Note: Certain fabrics and materials discolor or may
become damaged by heat. Therefore, avoid installing heater
against vinyl wall coverings or below plastic or vinyl items such
as blinds or vinyl drapes since these items may become dam-
aged by the heated air flowing from heater.
Furniture: maintain at least 6 inches (152 mm) space between
furniture and heater to allow for proper air flow.
1. Remove wiring compartment cover at end of heater where
power supply cable is to enter (Figure 3). Determine desired
mounting location, position heater to wall and mark wall (or
floor) at location where power supply is to enter heater.
NOTE: For most efficient operation locate heaters along outside
wall under windows. Position heater so it can be secured to
wall stud. Power cable must enter heater through built in cable
clamp or one of the knockouts provided in wiring compartment.
2. Drill hole in wall (or floor) at desired location for power supply
entry. Install power supply wiring to heater and thermostat
location as determined by thermostat option selected. Allow
approximately 10 to 12 in (254mm to 305mm) of wire at
heater for connections.
3. If any accessories are to be used with this heater, refer to
installation instructions provided with the accessory for prop-
er installation and wiring. Visit www.marleymep.com for
instructions on some common accessories.
4. Wireway Cover - Commercial Baseboard Only
a. The wireway cover is a factory installed feature of Marley
commercial baseboard heaters. Two cables or four indi-
vidual conductors plus two ground wires may be routed
through the wireway. Refer to page 1, Table 1 for wire
size and current loads.
b. To gain access to wireway, lay heater face down and
remove the screws holding the wireway from the back of
the heater. Remove the knockouts in the channel areas of
both terminal boxes.
c. Insert the plastic bushings from the parts kit (in wiring
compartment) in the knockout holes.
d. Wire heater according to wiring diagrams in Figure 5.
Attach the wireway cover using the screws.
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
is 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 Diagrams Figure 5. 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 volt-
age rating as printed on the heater nameplate – see Figure
1.
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 recep-
tacle (outlet).
6. CAUTION – Heater Operates at High Temperatures. Keep
Electrical Cords (including telephone and computer cables),
Drapes, and Other Furnishings Away From Heater. For effi-
cient and safe operation, we recommend maintaining a min-
imum of 6 inches (152 mm) clearance above and in front of
the heater at all times. See Figure 2 for minimum clearance
requirements for drapery.
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. Caution label with word
“TOP” must be at the top when heater is installed.
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, if bottom mounting holes are used
(see Figure 4), make sure screws do not damage supply
wiring in the area behind heater.
11. Do not remove or bypass the safety limit control as this
could allow heater to become a fire hazard – see Figure 4.
12. When using RSA Transformer Relay Accessory, supply
wiring provided in compartment where this accessory is
installed, must be rated 90 °C minimum.
2
CEILING
FLOOR
FLOOR
DRAPES
HEATER
WALL
WALL
CEILING
MIN. 1”
(25 mm)
MIN. 2”
(51 mm)
MIN. 1”
(25 mm)
MIN. 1”
(25 mm)
MIN. 6”
(152 mm)
HEATER
DRAPES
Figure 2: Clearance for Drapery
Example 1
Example 2
Figure 3
Wiring
compartment
cover
Screw
Front Cover
