Brochure
General Installation Guidelines
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Make  a  sketch  layout  or  a  floor  plan  of  the  room; 
include  all  permanent  furnishings  such  as  toilets, 
bathtubs,  appliances,  cabinetry,  etc.  Indicate  all 
dimensions  required  to  determine  the  available  floor 
area  and  the  position  of  the  LX  thermostat.
TIP: Danfoss recommends installation is documented 
with photos to note the location of connections and 
the sensor.
Step 1. PLAN LAYOUT
Draw an outline of the layout on the room floor including 
a  foot  print  of  all  furnishings  that  are  not  yet 
installed.  Unroll  the  first  few  feet  of  the  LX  mat.  The 
starting point of the cable must be placed within 10 ft. 
from the thermostat. Mark the position of the connection 
point  between  the  power  lead  and  the  red  LX  heating 
cable. This connection must be concealed in thinset or 
self-leveling cement.   When using a floor temperature 
sensing  thermostat,  mark  the  sensor  position  in  the 
middle of 2 heating cables, about 10 in. (25cm) away from 
the wall (within the heated area), as close as possible to 
the thermostat.
Step 2. TRANSFER LAYOUT TO FLOOR
(recommended in conduit, part#19809099 included)
If  using  a  floor  temperature  sensing  thermostat,  install
the  sensor  now,  either  in  conduit  tube,  or  directly  to 
the  subfloor.  It  is  recommended  that  the  sensor  be
installed  in  conduit  tube.  This  will  allow  the  sensor
to  be  easily  replaced  in  the  unlikely  event  of  failure.
The  sensor  and/or  tube  needs  to  be  installed  between 
the  thermostat  wall  box  and  the  sensor  position. 
The conduit tube must be partially countersunk into the 
subfloor. Cut a channel 5/16” deep by 5/16” wide in the 
floor  and  wall  up  to  the  thermostat  large  enough  to 
accommodate the sensor conduit. The conduit has to go 
from the thermostat and minimum of 10 “ away from the 
wall towards the middle of the floor.
Step 3. INSTALL SENSOR
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Copyright 2009 Danfoss Inc. 
TEL: 866-676-8062. FAX: 905-285-2055
088L3380 - 06/09










