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10
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 water heater is completely wired to
the junction box inside jacket at the top
front of the water heater. An opening
for 1/2 in. or 3/4 in. electrical fitting is
provided for field wiring connections.
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.
Insulation blankets, available to the general public,
for external use on electric water heaters are not
necessary. The purpose of an insulation blanket
is to reduce the standby heat loss encountered
with storage tank heaters. This water heater
meets or exceeds the National Appliance Energy
Conservation Act standards with respect to
insulation and standby loss requirements making an
insulation blanket unnecessary.
The manufacturer’s warranty does not cover any
damage or defect caused by installation, attachment
or use of
any type of energy saving or other unapproved
devices (other than those authorized by the
manufacturer) into, onto or in conjunction with the
water heater. The use of unauthorized energy saving
devices may shorten the life of the water heater and
may endanger life and property.
The manufacturer disclaims any responsibility for
such loss or injury resulting from the use of such
unauthorized devices.
CAUTION: If local codes require the
application of an external insulation blanket
to this water heater, pay careful attention to
the following so as not to restrict the proper
function and operation of the water heater:
DO NOT cover the operating or warning labels
attached to the water heater or attempt to relocate
them on the exterior of insulation blanket.
DO NOT cover air openings on both sides of the
water heater .
DO NOT cover the Controller Assembly,
temperature and pressure relief valve or drain
valve.
Inspect the insulation blanket frequently.
!
WARNING:
If local codes
require external
application of
insulation
blanket kits the
manufacturer’s
instructions
included with
the kit must be
carefully
followed.
Insulation Blankets
Electrical Connections continued...
Water heater junction box.
Junction
Box Cover
Ground
Screw
DO NOT turn on the
electrical supply or operate
this water heater unless it is
completely full of water.
!
Installing the water heater
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.
!
!
Branch Circuit Sizing And Wire Size Guide
Total Water Heater
Wattage
Recommended Over Current
Protection (Fuse or Circuit
Breaker Amperage Rating)
Copper Wire Size AWG based on
NE.C. Table 310-16 (75˚C)
240V 240V
2250 15 14
2750 15 14
3000 20 12
4000 25 10
5000 30 10
5500 30 10
NOTE: When sizing the breaker and wire for over current protection, include an additional 500W
to the upper element wattage rating. This will account for the maximum amperage draw of the
compressor and fan motor.
SINGLE
PHASE
WIRING
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.
Wire
Connections
CTA Adaptor
(Not applicable
for all models
Conduit
connector
Vertical
Flexible
Filter
Air Outlet
Opening
Air filter
must be
accessible
Controller
Assembly
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