Reznor EFMA Unit Installation Manual - Manual (Page 24)

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6.
F
AQ
6.1 Floor Heating System
Q.1: Can I cut the EFMA heating cable to shorten it?
A.1: NEVER. If the EFMA roll is too long, detach the excess cable from the mat and
spread it on the floor in regular loops identical to those on the mat. Keep the
minimum distance from the walls and between parallel runs of cable (radius
bending of at least 20 mm [¾”] for loops).
Q.2: What should I do before choosing the EFMA system that’s right for me?
A.2: Sketch a plan to determine the surface area. We can help optimize your work
plan. Fax it to us at 724-662-3957.
Q.3: How do I repair EFMA in case of a malfunction?
A.3: First, as a PREVENTIVE measure during installation, test the cable each
time as specified in the installation guide. Also complete the measures’ table.
However, in case of a malfunction, an authorized REZNOR repair person will
visit to LOCATE the fault and REPAIR it. It is recommended that you keep
spare ceramic tiles or flooring for this purpose.
Q.4: Are there other watt densities per square foot available?
A.4: No. REZNOR believes that 12W/sq. ft. is the best watt density to optimize
comfort and prevent floor overheating. Moreover, the 240V and 120V systems
provide equal heating power per square foot.
Q.5: Can I crisscross, overlap, or touch two heating cables together?
A.5: NEVER. This will cause overheating. Keep cables at least 76 mm (3”) apart.
Q.6: Can the cable be bent 90°?
A.6: Yes, but make sure the radius bending is at least 20 mm (¾”). Any bending
smaller than this may damage the cable.
6.2 Installation
Q.7: Can I install one EFMA system on top of another?
A.7: NEVER. The system will overheat. Heating power must not exceed 12W/ sq. ft.
(130W/sq. m).
Q.8: Can EFMA be used for exterior snow melting?
A.8: No. EFMA is designed to provide comfort and heating in indoor residential
applications only.
Q.9: Is a GFCI necessary?
A.9: A GFCI is required in the bathroom. It is recommended for all other rooms.
Q.10: Is a floor sensor necessary?
A.10: Yes, to control floor surface temperature so that it does not exceed the floor
covering’s maximum temperature tolerance. Even if it is not an obligation
to use a floor sensor when using the system with an ambient thermostat,
REZNOR recommends the use of a floor sensor.
Q.11: Can I connect two EFMA systems to the same thermostat?
A.11: Yes. You can even connect additional systems provided the connection is
parallel and total output does not exceed the thermostat’s capacities.
Q.12: What happens if the voltage applied is the wrong one?
A.12: Connecting a 120V product to a 240V/208V current will overheat the system
and lead to an overheating and failure. A 240V/208V productconnected to a