How to connect and program your UCCG-9991-EA electronic programmable thermostat w/GFCI and floor temperature sensor
Microline UCCG-9991-EA programmable thermostat for radiant
electric floor heating has number of unique features like GFCI protection,
learning function or energy usage report. To try it out it needs to be
installed and connected first.
Copy of the istallation and usage manuals are availabe
for download and printing:
UCCG is dual voltage but the heating mats
or cables are always single voltage 120V OR 230-240V. Power
supply Voltage and mat's Voltage have to be the same. Connection is identical
for either Voltage. For 240V power wires are marked
as L1 and
L2. For 120V power wires are marked
L (Line or Hot, usually black) and
N (Neutral, usually white).
Whether connecting one or more mats or one or more cables
always observe maximum load allowed for the line and the thermostat!.
Max. load is 16 A. That's 1800W @ 120V or 3800W @ 240V. If
the line allows for connecting more load the contactor has to be
Our thermostats Contain no Mercury
- a highly poisonous substance present in lethal quantities in many
older thermostat models and many still on the market.
Indoor application only. Outdoor snowmelting and ice
protection needs a different, special thermostats.
ONLY ONE OF THE FOLLOWING PICTURES WILL APPLY TO YOUR
PARTICULAR INSTALLATION, depending on what is being
Connection of Elektra MG in-floor radiant
heating mat with 2 connecting cords, 120V or
...or for the newer style of MG mats:
When more than one mat is connected - connect color coded wires
of the mats together and then to the thermostat like shown above.
Connection of Elektra MD in-floor heating
mat with 1 connecting cord (120V or 240V) or VCD
cable with 1 connecting cord (230-240V only):
When more than one heating mat or heating cable is connected -
connect color coded wires of the mats together and then to the thermostat like
When more than one heating cable is connected - connect color
coded wires of the mats together and then to the thermostat like
Don't forget floor temperature
The sensor can be installed directly in the mud. It is better
(but harder) to install it in the conduit - allowing easy replacement when
sometimes in the future new thermostat models become available. 1"-3" away
from the heating coil is best. (The thinner the mud job - the closer to
1" distance it should be).
Floor temperature sensor location is very important.
For example this is much better sensor location for the cable
...Than this, where the conduit should have been further into the floor and
Make sure that to be able to replace the sensor the end of the
conduit is plugged in so the thinset or a mud cannot get inside.
The sensor can also be mudded-in (installed without conduit) but then the
replacement will not be easy.
After installation. 4 QUICK
To quickly set up this thermostat for usage, use
Locate tiny R button right under the display.
With something small like toothpick, press and hold it for 3 seconds.
This will conveniently invoke factory settings.
You will need to set current time and then
current day of the week: 1-MON, 2-TUE,
3-WED, 4-THU, 5-FRI,
Use UP or DOWN
then accept the choice with middle√
To check GFCI, manually raise the temperature
using UP button so the thermostat starts sending current
to the floor to heat it up. You should hear a quiet
click and see the ∫∫∫ symbol in the bottom
right corner of the screen.
When you do,
wait 10 seconds and press GFCI test button. You should hear a
disengaging click and the red GFCI light
will come on.
GFCI's OK! Repeat this monthly like with any other GFCI protected
To use the
thermostat in the manual mode simply use
the UP or DOWN buttons:
then accept the choice with middle√
will work until the next event in the
is what you will see after manually setting the floor heating to
∫∫∫ symbol showing the floor is
after installation E2 error code appears - the floor
temperature sensor is not connected or the connection is weak. Reinsert the
senor wire into the gray terminal on the back of the thermostat or refer
to the thermostat's manual.
Floor temperature sensing thermostat will be cycling the
electricity flow to power the in-floor mat ON and OFF to keep the
floor at the preset temperature, thererfore saving energy especially when
compared with electrical appliances continuously drawing power. In the
typical settings for the programmable thermostat with the adaptive-learning
function, an average ON time is only 3-4 hrs for every 24 hrs of
Radiant electric floor heating being low Wattage and
low temperature heating is considered VERY ENERGY EFFICIENT
INSTALLING THE MAT(S):
CUT THE HEATING WIRE!
THE FIBERGLASS MESH CAN BE CUT, NEVER THE HEATING COIL!
THE DISTANCE BETWEEN HEATING COILS!
is NOT OK:
IS THE ABSOLUTE MININUM. 2"-3" IS BEST.
Last but not least
remember: Electricity can be deadly and wiring done incorrectly can kill and
start deadly and destructive fires even when "just replacing one small
ARE DEALING WITH LINE VOLTAGE, not low voltage!
EVER attempt to work or even touch the inside of the electrical components
without being 100% sure that the power is
you are not an electrcian and if you have the slightest doubt about your wiring
ability, please contact a licensed electrician and/or repairman before
doing any diagnosis, repairs or installations. The products shown here
are deemed SAFE and sound by various testing authorities but the wiring
process can only be SAFE when done with safety precautions. Please
read manuals and/or ask pros when not sure. Most of the simple
installations shown here can be done by yourself or you can have someone
qualified do it for you and THEN have the electrician check it and connect it to