Installation / Operation Instruction Manual

Electrical Connections

Before any electrical connections are made, be sure that the water heater is

full of water and that the manual shut-off valve in the cold-water supply line is

open. Check the rating plate and wiring diagram before proceeding. This

electric water heater was built and wired in accordance with the UL testing

approvals requirements. The temperature limiting device is of the manual

reset, trip-free type and has been factory installed to interrupt all ungrounded

power supply conductors in the event of thermostat failure. Thermostats are

factory set and wired in accordance with the wiring diagram fastened to the

inside of the top access panel. The plumbing supplier in your area ordered

this heater wired at the factory to comply with existing area codes, but local

utility codes may require or allow other circuitry. The thermostats are factory

set and wired in accordance with the wiring diagram affixed to the water

heater next to the thermostat/element access cover. Consult your local

power company to determine the correct electrical hook-up in order to meet

local utility and building codes and in order to obtain the most economical

rates. Also check to find out if you are required to obtain a permit before

starting the installation. Note: Install electric connections according to

local codes or latest edition of National Electrical Code NFPA 70.

The water heater must be well grounded. The green ground wire from the

power supply shall be attached to the terminal marked for this purpose on

the terminal block for all water heaters except 10 and 15 gallon utility models.

For 10 and 15 gallon utility models, the ground wire shall be attached to the

green ground screw located under the element access cover.

Upright and lowboy models are wired for “unbalanced” three phase delta

branch circuit operation. Upright and lowboy models (only) may be converted

to single phase and/or simultaneous operation as shown on the wiring

diagram (see figure 3A and 3B). To ensure proper electrical connection,

check the voltage and wiring configuration on the rating plate located on the

front of the water heater.

Run the power leads from an adequately fused disconnect switch (not

supplied) and connect the wires to the water heater according to the wiring

diagram found in these installation and operation instructions (see figures

3A, 3B, and 4 for correct wiring diagram) and located on the front of the

water heater. Where longer runs are needed or local codes and ordinances

require, an increase in wire size may be necessary. Consult local codes

and/or your local power company for any specific requirements which may

apply. In the absence of local codes and ordinances, refer to the National

Electrical Code.

WARNING

Proper ground connection is essential. The presence of water in the

piping and water heater does NOT provide sufficient conduction for a

ground. Nonmetallic piping, dielectric unions, flexible connectors, etc.,

can cause the water heater to be electrically isolated. Do NOT

disconnect factory ground.