Electrical Requirements And Precautions; Electrical Installation - Atmor Thermo Pro2 Series Manual

7. Electrical Requirements and Precautions

Manufacturer recommends that this product be installed in accordance with all applicable national, state, provincial,
and local electrical codes. Consult a qualified and licensed electrician if you have questions or are unsure about
anything relating to codes for this product. The heater must be connected to a dedicated circuit breaker on the main
electrical panel.
WARNING: As with all electrical appliances, it's crucial to first shut off all power to the unit directly at the fuse or
breaker box before attempting to install, repair or disassemble this water heater. Ensure that the breaker is shut off.
SERIOUS BODILY INJURY OR DEATH COULD OCCUR IF YOU IGNORE THIS WARNING.
CAUTION: All wiring (wire gauge), as well as circuit protection (breaker), must comply with the U.S. National
Electrical Code (NEC) in the USA or the Canadian Electrical Code (CEC) in Canada. Failure to do so could lead to
property damage, personal injury, and void your warranty.
Note: The Canadian Electrical Code generally requires that all supply wires and corresponding circuit protection used
for domestic hot water heating and hydronic heating applications be sized to a minimum of 125% of the maximum
current rating of the heater (check heater specification details below).
Before installing this tankless water heater, ensure that sufficient electrical power is available in the home to handle
the maximum amperage load of the applicable heater.
IMPORTANT NOTES:
All water heaters heater requires 3 set of wire and ground (see wiring diagram on page 11)
• Please see electrical specifications by heater input and wiring diagram on the page 11 for additional electrical
information.

8. Electrical Installation

STEP 1: Take the wire pair and connect to the breaker (see wiring diagram). Be sure that the breaker is connected to
one black wire and one red wire. Be sure the power to the unit is shut off using the dedicated circuit breakers in the
main electrical panel.
STEP 2: Run the correct set of power cable wires from the circuit breaker in the main electrical panel to the water
heater by utilizing a suitable wire gauge which meets all applicable electrical codes for the size of the breaker. Then,
connect the power cable to the block terminal within the water heater.
STEP 3: Unit requires a ground conductor for the incoming circuit.
STEP 4: DOUBLE CHECK the electrical connections and ensure the wire connections are correct, tight and
secure. It's important to confirm that the right breaker size and wire gauge has been used and that the unit has been
connected to a ground in accordance with applicable codes. Be sure to reattach the front cover of the unit with two
screws.
STEP 5: Ensure that all the air has been purged from the water lines before turning on power to the unit. Refer to
STEP 3 in the plumbing installation section. Restore power to the unit through the dedicated circuit breaker in the main
electrical panel.
It is crucial to follow the wire connection as shown and ensure all connections are made correctly for
proper operation of the unit. The unit will not operate correctly, even though it turns on and otherwise appears
to function, if you mix up one set of wire with another.
9