PLEASE EXPLAIN
Heated driveway?

Commercial snow melting. (E.g. TOYOTA + ELEKTRA).

HYPOCAUST. Made in GREECE and ROME

ONDOL - The Korean invention

American Legend: Architect Frank Lloyd Wright

From STONE COLD to NICE WARM floors in just 2 hours?

New Kitchen Project. (Part 1)

New Kitchen Project. (Part 2)

Radiant heating in one day?

From cold slab floor to comfort and beauty.

How to connect UCCG-9991 programmable thermostat for radiant floor heating?

How to connect MTC-2991 manual thermostat for radiant floor heating?

How to choose the in-floor radiant heat ELEKTRA mat?

Many components of the Great Real Estate. (Part 1).

Many components of the Great Real Estate. (Part 2).

How to connect more than 1 mat?

The problem on the roof

Installing radiant floor heating in just one afternoon.

Cathedral ceilings effect & Medieval Hypocaustum (floor heating)

STEP-BY-STEP INSTALLATION




Connecting your UCCG programmable thermostat



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 used.

 

  • 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 installed:


Connection of Elektra MG in-floor radiant heating mat with 2 connecting cords, 120V or 230-240V:

 

...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 shown above.

 


Connection of Elektra VC heating cable, 2 ends connected, 230-240V ONLY:

When more than one heating cable is connected - connect color coded wires of the mats together and then to the thermostat like shown above.

 


Don't forget floor temperature sensor! 

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 heating system:

 

...Than this, where the conduit should have been further into the floor and cables there:

 

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 TIPS.

 

1.

To quickly set up this thermostat for usage, use factory settings.

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, 6-SAT, 7-SUN.

Use UP or DOWN buttons: 

^ or v …and then accept the choice with middle button

 

2.

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.

Your GFCI's OK! Repeat this monthly like with any other GFCI protected device.

 

3.

To use the thermostat in the manual mode simply use the UP or DOWN buttons: 

^ or v …and then accept the choice with middle button.

This will work until the next event in the thermostat memory. 

Here is what you will see after manually setting the floor heating to 90F 

 

 

with ∫∫∫ symbol showing the floor is being heated.

 

4.

If 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 usage. 

Radiant electric floor heating being low Wattage and low temperature heating is considered VERY ENERGY EFFICIENT


WHEN INSTALLING THE MAT(S):

 

  • DON'T CUT THE HEATING WIRE!
  • ONLY THE FIBERGLASS MESH CAN BE CUT, NEVER THE HEATING COIL!

 

 

MAINTAIN THE DISTANCE BETWEEN HEATING COILS! 

This is NOT OK:

 

1" IS THE ABSOLUTE MININUM. 2"-3" IS BEST.

 


 

Last but not least

 

Please remember: Electricity can be deadly and wiring done incorrectly can kill and start deadly and destructive fires even when "just replacing one small receptacle". 

YOU ARE DEALING WITH LINE VOLTAGE, not low voltage! 

NEVER EVER attempt to work or even touch the inside of the electrical components without being 100% sure that the power is disconnected!

If 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 power.    

 


 

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