Use a single-gang box installed vertically. Carefully remove the front cover by unscrewing the retaining screw as indicated below.
1.2 Mounting the thermostat
'The thermostat should be mounted at least 5 ft above the floor and allow for free air circulation around it.'
1. Close the electrical single gang box by screwing the front part (already attached to the back module of the thermostat) onto the rear part installed into the wall.'
2. Ensure that the thermostat is straight before tightening completely.'
3. Replace the thermostat’s front housing: • Align and sit front housing on to hinges.
• Push lower half of front housing until your hear a ‘click.’
• Ensure front housing is securely fixed and insert the retaining screw. Tighten the retaining screw.
1. The black and white wires from the breaker box are connected to lines 2 & 3 on the thermostat. Use 12 AWG/gauge wire from the panel to thermostat.
2. The white and black wires from the heating system are connected to loads 1 & 4.
3. The floor sensor is connected to the back of the thermostat. Connect sensor wire to terminals C & D of the thermostat. Note: terminals A & B are used only if connecting a relay. See image below
4. Test the resistance of the sensor wire with a digital ohmmeter or multi-meter (set it to measure between 0-200 ohms). Usually your readings will be between 8 – 15 depending on the floor temperature.
NOTE: All cables and connections must be carried out by a qualified electrician and must conform to the local electrical code.
1.4 Installing a Relay
NOTE: Each relay will need its own dedicated 20 amp circuit.
• When loads of more than 15 amps are required, expansion is possible by using power modules. • Power modules are connected to the live circuit and the load wires. • Maximum distance between thermostat and power modules is 80 ft. Use field wiring cable, recommended minimum 20 AWG/gauge ‐ 2 conductors. • Connect communications wire to terminals A and B on the thermostat, then to terminals C and D on the relay. If more than one relay is used, connect communications wire to terminals A and B on first relay then to terminals C and D on second relay. • Thermostat and relays have Class A GFCI protection built in. Warmup recommends a 20amp non – GFCI circuit dedicated circuit be supplied to each thermostat or relay.
The GFCI light continues to come back on after pressing the reset button. This issue is related to a problem with the installation of your heating system to the thermostat. There is a failed current to ground occurring. Your resistance readings will need to be taken: core to core and both ground readings. We suggest having the electrician who installed the product perform these readings. Once obtaining the heating element model number and the readings have been performed, call Warmup with the results to confirm the diagnosis. Error “E0”
There is an internal failure and the thermostat needs to be replaced. Return product to your retailer or contact your sales representative for a replacement. Error “E1” The internal sensor is defective or has short-circuited. Contact your retailer for a replacement. Error “E2” Check to make sure that the floor sensor has been connected correctly. See the installation manual for instructions. If these situations do not apply then the external sensor is defective or short-circuited. Check the external sensor. Check the resistance reading of the sensor wire. We suggest having the electrician who installed the product perform this reading. Once you have obtained this information, call Warmup to confirm the diagnosis. My thermostat is on but it is taking too long for the floor to warm up/not heating up at all. • Check to make sure that you have wired the thermostat correctly, following the instructions detailed in the basic installation instructions. • If the wiring is correct, use a multi-meter and take readings from your heating system wire (See installation manual for your heating system). • Did you install WIB (Warmup Insulation Board) over your concrete slab? If not, it will take longer for your floor to reach the target temperature.
1.7 Miscellaneous Questions
How many heating systems can be connected to one thermostat? This is dependent upon the amperage of the units that you are trying to install. Each thermostat can carry a load of 15 amps. Once this limit is reached, a relay must be installed (and multiple relays after that, dependent upon the amperage of the units). Please note that while the relay needs to be accessible, it does not need to be in plain sight. You may hide it in a cabinet to avoid having two thermostats visually available in the room. With that being said, if you are not interested in having a master and a relay and would prefer to have just one thermostat installed, you may have you electrician install a sub-panel to help carry the extra amperage load. How long does the thermostat keep my settings once the power has been shut off? The settings remain indefinitely – the clock will be reset after 2 to 4 hours. The heating system has a ground wire but the thermostat has no terminal for ground. The ground wire of the heater(s) must be directly connected to the ground wire of the supply. Can I use the WUDG-4999 with other floor heating systems? Possibly, however, you should check with the manufacturer of the electric floor heating system you are considering and provide them with the thermostat specifications outlined in our installation manual. Warmup is not responsible for any damage that may occur if you choose to use the thermostat with a different floor heating system. Is an electric floor heating thermostat the same as a regular thermostat? No. Floor heating thermostats are specifically designed to control electric floor heating systems.
2 Technical Questions
2.1 What gauge wire do I use to connect the electrical panel to the thermostat?
Typically 12/2 or 14/2 gauge wire is used if a 120V floor heating system will be powered. For 240V floor heating systems 14/3 gauge wire is utilized.