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