King Electric USG-4000 Floor Heating Thermostat Installational Manual

King Electric USG-4000 Floor Heating Thermostat

WARNINGS
To avoid electric shock, disconnect the heating system power supply at the main panel before performing installation and maintenance work on the power module. Keep the power module air vents clean and free from obstruction. This power module is an electrical device and must be installed in compliance with national and/or local electrical codes. Installation must be performed by qualified personnel where required by law. If a power module with an equipment ground fault protection device (EGFPD) is to be installed where national and/or local electrical codes require a ground fault circuit interrupter (GFCI), a separate GFCI must also be installed.

Checking the GFCI/EGFPD

It is important that the GFCI/EGFPD is checked for correct installation and function upon installation and monthly thereafter.
To check the GFCI/EGFPD:
Press the “TEST” button.
The test is successful if the red LED on the right of the power module flashes once every two seconds. If this does not occur, check the installation.
Press the “Standby/Reset” button to reset the GFCI/EGFPD.
The red LED will stop flashing and the display returns to its normal appearance. If the test fails, repeat the test. If it continues to fail, ask an electrician to check the installation. If during normal operation, the GFCI/EGFPD trips without the “TEST” button is pressed, there could be a ground fault! To check whether it is a ground fault or nuisance tripping, press “Standby/Reset”. If this causes the red LED to stop flashing and stay off, it was nuisance tripping and the system is operating correctly. If this does not occur, there is a ground fault! In case of a ground fault, it is important to have the installation checked by a qualified electrician according to local and national regulations.
The red LED on the right of the power module can indicate four different GFCI/EGFPD states:
LED off – NORMAL state.
LED flashing slowly (once every two seconds) – TRIGGERED state. Try pressing the “Standby/Reset” button to reset the GFCI/EGFPD.
LED flashing quickly (five flashes per second) – ERROR state. Try switching the power module off and then back on again. If the power module
re-enters the ERROR state, either the wiring is wrong (a GN exists) or the unit is defective and must be replaced.
LED lit constantly – Internal microprocessor malfunction or abnormal fault in hardware! Try switching the power module off and then back on again. If the LED is still constantly lit, the GFCI/EGFPD is defective and the power module must be replaced.
Note: The LED lights up briefly without flashing during every power-up.

CLASSIFICATION

The product is a class II device (reinforced insulation) and must be connected to the following leads:

• Phase L1 (L) 120/208/240 V
• Neutral L2 (N)
• Max. load
• 15 A (resistive load)
• The power module is intended to be used with underfloor heating. The heating element must be rated according to the supply voltage. The terminals are suitable for field wiring cables of 12 to 20 AWG.

The USG-4000 has a built-in two-pole ground fault circuit interrupter (GFCI, Class A). The ASG-4000 has a built-in two-pole equipment ground fault protection device (EGFPD). The thermostat is for flush mounting in a wall socket.

TECHNICAL DATA

• Supply Range……………………………………………………..120/240 Vac 50/60 Hz
• Load ……………………………………………………………. max. 15 A (resistive load)
• Max. power, dependent on voltage……………………………. 1800 W at 120 Vac
• ……………………………………………………………………………. 3120 W at 208 Vac
• ……………………………………………………………………………. 3600 W at 240 Vac
• a. USG-4000 (GFCI)…………………………………………..Class A (5 mA trip level)
• b. ASG-4000 (EGFPD)………………………………………………….(15 mA trip level)
• Temperature range ………………………………….. +5 to +40°C / +41 to +104°F
• Amb. temp. range ……………………………………….. 0 to +25°C / +32 to +77°F
• Construction of Control…………………………… Electronic room thermostat for
• regulating electrical underfloor heating.
• Method of Mounting Control……………………………… Independently mounted
• control for flush mounting
• Type of Action……………………………………………………………………… Type 2.B.
• Rated Impulse Voltage……………………………………………………………… 2500 V
• Control Pollution Degree…………………………………………………………………….2
• USA – Design Patent No. …………………………………………………….. 29/518635
• Canada No. …………………………………………………………………………….161353

CERTIFICATION
UL is Listed in the US and Canada
According to the following standards: UL 60730-1 / UL 60730-2-9
CAN/CSA E60730-1 / CAN/CSA-E60730-2-9
USG-4000: UL 943 fourth ed. CSA C22.2 No.144.1-06
ASG-4000: UL 1053 CSA C22.2 No. 0.8

QUICK START GUIDE

1. Loosen the screw at the bottom and remove the faceplate. Do not attempt to remove the screw completely
2. Turn the power source OFF at the breaker panel. Make electrical connections to the power base. See Warnings. AWG between 12 and 20.
   Note! Do not detach the screws from the terminals. When tightening the screws, use a torque of between 0.8 and 1.2 Nm.
3. The signal cable must not come in contact with electrical wires in the wall and must be routed outside the electrical box. Thread the signal cable through the hole in the power base. Push the electrical wires to the back of the electrical box.
4. Push the power base into the electrical box. Secure the power base to the wall.
5. CAUTION
   If the primary and secondary relays are connected incorrectly, the secondary relay will be constantly pulled. The floor might overheat.
   • Power module
   • Power module/secondary relay
   • Thermostat/power module/primary relay
6. Remount the faceplate. Tighten the screw at the bottom.

Cable recommendations

The maximum distance between the thermostat and power module, or between successive power modules is 80 ft (25 m). Use field wiring cable; 20 AWG is recommended. The use of wires in two different colors is recommended. Connect the thermostat to the power module by connecting terminal A on the thermostat to terminal C on the power module and terminal B on the thermostat to terminal D on the power module – as shown in the illustration. Only one wire can be connected to any one of the terminals A, B, C, or D. Any number of power modules can be added to the system.© 2016 OJ Electronics A/S · ® The OJ trademark is a registered trademark belonging to OJ Electronics A/S

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King Electric USG-4000 Floor Heating Thermostat Installational Manual

King Electric USG-4000 Floor Heating Thermostat Installational Manual