Installation Guide

208 V APPLICATIONS 25
Discussion of Schluter
®
-DITRA-HEAT-E-HK Heating Cables in
208 V Applications
208 V APPLICATIONS
Item No. Length (ft - m) Area (ft
2
- m
2
) Power (W)
Average Power
(W/ft
2
- W/m
2
)
Current (A)
DHE HK 240 11 35.3 – 10.8 7.1 – 0.7 101 14.2 - 152.8 0.5
DHE HK 240 16 53.1 – 16.2 10.7 – 1.0 152 14.2 - 152.8 0.7
DHE HK 240 21 70.5 – 21.5 14.2 – 1.3 203 14.2 - 152.8 1.0
DHE HK 240 27 88.2 – 26.9 17.8 – 1.7 254 14.2 - 152.8 1.2
DHE HK 240 32 105.8 – 32.2 21.3 – 2.0 304 14.2 - 152.8 1.5
DHE HK 240 38 124.1 – 37.8 25.0 – 2.3 356 14.2 - 152.8 1.7
DHE HK 240 43 141 – 43.0 28.4 – 2.6 405 14.2 - 152.8 1.9
DHE HK 240 53 176.3 – 53.7 35.5 – 3.3 506 14.2 - 152.8 2.4
DHE HK 240 64 211.6 – 64.5 42.7 – 4.0 608 14.2 - 152.8 2.9
DHE HK 240 75 248.2 – 75.7 50.0 – 4.7 713 14.2 - 152.8 3.4
DHE HK 240 85 282.1 – 86.0 56.9 – 5.3 810 14.2 - 152.8 3.9
DHE HK 240 103 339.4 – 103.4 68.4 – 6.4 975 14.2 - 152.8 4.7
DHE HK 240 129 425.8 – 129.8 85.8 – 8.0 1223 14.2 - 152.8 5.9
DHE HK 240 145 480.5 – 146.5 96.9 – 9.0 1380 14.2 - 152.8 6.6
DHE HK 240 167 551 – 167.9 111.1 – 10.3 1583 14.2 - 152.8 7.6
DHE HK 240 183 605.9 – 184.7 122.1 – 11.4 1740 14.2 - 152.8 8.4
DHE HK 240 204 673.8 – 205.4 135.8 – 12.6 1935 14.2 - 152.8 9.3
DHE HK 240 225 744.4 – 226.9 150.1 – 13.9 2138 14.2 - 152.8 10.3
DHE HK 240 269 888 – 270.7 179.0 – 16.6 2550 14.2 - 152.8 12.3
Schluter
®
-DITRA-HEAT offers complete flexibility when creating warm floors in any application. Schluter
®
-DITRA-HEAT-E-HK heating cables
are designed for use with common 120 V and 240 V power sources. 208 V power sources are used in some cases to handle larger loads
(e.g., HVAC equipment, motors, etc.) or to improve energy efficiency.
Schluter
®
-Systems recommends using the DITRA-HEAT-E-HK 240 V heating cables when a 208 V power source is present. However, this
will reduce the heating power by 25% to 9.5 W/ft
2
at the standard 3-stud cable spacing, which may not be sufficient power to warm the
floor in these applications. To offset the effect of the lower voltage, we recommend installing the heating cable at a 2-stud spacing in these
applications. This results in an increased heating power of 14.2 W/ft
2
, which will ensure adequate performance.
The heating cable will cover 33% less area when spaced at 2 studs compared to 3 studs. Therefore, a longer heating cable must be selected
to cover a given area in these applications. Coverage for each 240 V heating cable spaced at 2 studs can be found in the table below.
We recommend consulting with a qualified electrician for design and installation of your DITRA-HEAT system on a 208 V power source. Keep
in mind during design of the system that the DITRA-HEAT-E-RT/-RSD/-R thermostats have an electrical current limit of 15 A.
DITRA-HEAT-E-HK 240 V Heating Cables in 208 V Applications at 2 Stud Spacing