EC18 EC24
ELECTRICAL INSTALLATION
CAUTION: Ensure that you have made the correct connections. You must follow the wire connection as shown in ensure
proper operation of the unit.
WARNING: For supply connections use 8 AWG or larger wires suitable for at least 167°F (75°C).
WARNING: This product has more than one power-supply connection point. Disconnect all power supplies before servic-
ing.
WARNING: The overcurrent protective devices are provided as a separate assembly, the product shall be used only with
this separate assembly.
WARNING: Firstly turn on the water and let it to run in the product for several minutes, and exhaust all the air in the
plumbing. At the same time, check whether there is water leakage at the internal and external water connections of the
product.
WARNING: To avoid a short circuit and circuit board is damaged, , make sure all strands are secure inside the terminal
block.
Before installing the water heater, make sure that your home has enough power to handle the maximum current available
for this product.
As with all high-power electrical products, Make sure to turn off all power to the product directly at the fuse or breaker box
before installing, repairing, disassembling this water heater.
All circuit protection (breakers) and wiring (wire gauge) must conform to the US National Electrical Code (NEC) in the
America or Canadian Electrical Code (CEC) in Canada.
Failure to comply with these warnings can lead to risks include fire, electrical shock, death, and void your
warranty.
Before starting the electrical installation work, make sure that all water pipelines have been installed and the main circuit
breaker and power switch has been closed to prevent electric shock.
CIRCUIT CONNECTION
1. Connect each group of power wires to a circuit breaker in pairs (show as below). Make sure that each circuit breaker is
connected one group of L1 and L2.
EC18 need two circuit breakers.
EC24 need three circuit breakers.
Circuit
breaker
Circuit
breaker
Circuit
breaker
G
L2 L1
L2 L1 L2 L1
123456
Ground
Circuit
breaker
Circuit
breaker
Ground
G
L2 L1 L2 L1
1234
2. When connecting the power cords to the terminal block, make sure that the wire and the electric conductor inside the
terminal block are in full contact. Then tighten the screws. If it is loose, May causing an electrical short circuit and/or the
terminal block burns out.
3. Again to make sure that the wiring from the main circuit breaker to the water heater is correct. If the wrong wires is
connected, the product will not work normally and may cause unnecessary danger.
4. Check earth resistance and make sure there is a proper earth continuity.
5. Confirm that all the air has been purged from the waterpipe prior to turning on power to the unit.
INSTALLATION INSTRUCTIONS
9
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