Universal voltage power module (USG-4000): Suitable for 120V or 240V applications
15A Output Relay.
Max. load 120V = 1,800 Watts; 240V = 3,600 Watts
For use ONLY with OJ Electronics' UDG-4999 thermostats
Built-in Class A 5 mA GFCI with GFCI test light*
3 year manufacturers warranty
Dimension: 4.8x3.0x1.0 inches (123x75x25mm)
Made in Denmark
Fits single-gang (2" box) box but a double-gang (4" box) is recommended for more room to work with multiple mats.
Backside connection box dimensions: 1.682"W x 2.686"H x 1.2"D
LINE wires: connect to 2 middle screws marked L1, L2.
LOAD (mat) wires connect to 2 screws marked LOAD 1800W/3600W MAX 15A.
Thermostat/power module connection: loosen bottom screws, lift off covers, insert minimum 20 AWG wire through oval hole in back of both components, connect thermostat A and B therminals marked "OUT" to power module C and D terminals marked IN/SEN.