After the unit is installed, open the
shut-off valve in the cold water
supply line.
Open each hot water faucet slowly
to allow the air to vent from the
water heater and piping.
A steady flow of water from the
hot water faucet(s) indicates a full
water heater.
Electrical Connections
A separate branch circuit with
copper conductors, overcurrent
protective device and suitable
disconnecting means must be
provided by a qualified electrician.
All wiring must conform to local
codes or latest edition of National
Electrical Code ANSI/NFPA 70.
The voltage requirements and
wattage load for the water heater
are specified on the rating plate on
the front of the water heater.
The branch circuit wiring should
include either:
Metallic conduit or metallic
sheathed cable approved for use
as a grounding conductor and
installed with fittings approved
for the purpose.
Non-metallic sheathed cable,
metallic conduit or metallic
sheathed cable not approved for
use as a ground conductor shall
include a separate conductor for
grounding. It should be attached
to the ground terminals of the
water heater and the electrical
distribution box.
9
NOTICE: This guide recommends minimum branch circuit sizing and
wire size based on National Electric Code. Refer to wiring diagrams in this
manual for field wiring connections.
WARNING: The heater
chamber must be full of water
before the water heater is
turned on. The water heater
warranty does not cover
damage or failure resulting
from operation with an empty
or partially empty heater
chamber.
!
Purge Air From System
CAUTION: The presence
of water in the piping
and water heater does
not provide sufficient
conduction for a ground.
Non-metallic piping,
dielectric unions, flexible
connectors etc. can cause
the water heater to be
electrically isolated.
!
WARNING: Before
beginning any work on the
electric installation, be sure that
main breaker panel switch is
“OFF” to avoid any danger of
electric shock. All mounting and
plumbing must be completed
before proceeding with electrical
hook-up. Where required by
local, state or national electrical
codes the circuit should be
equipped with a “Ground fault
interrupter”.
1. All electrical work must comply
with national and applicable state
and local electrical codes.
2. The tankless heater should be
connected to a properly grounded
dedicated branch circuit of proper
voltage rating. In installations with
several tankless units, each unit
requires an independent circuit.
Please refer to th technical data
table for the correct wire and
circuit breaker size.
Warning: As with any electric
appliance, failure to electrically
ground unit may result in serious
injury or death.
Summary of Contents for RTE 3
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