lp-772 Rev. 000 Rel. 000 Date 3.17.21
10
This guide recommends minimum branch circuit sizing and wire size
based on the National Electrical Code. Refer to wiring diagrams in
this manual for field wiring connections.
Do not use this water heater with any electrical supply voltage other
than the one listed on the data plate. This water heater is equipped
for use with one voltage rating only. Check the data plate on the
front of the water heater for the correct voltage rating. Failure to use
the correct voltage can cause problems which can result in property
damage, severe personal injury, or death. If you have any questions
or doubts, consult your electrical utility company before installing
the water heater.
Total
Heater
Wattage
Recommended Over
Current Protection
(Fuse or Circuit Breaker)
Amperage Rating
Copper Wire Size
AWG Based on N.E.C.
Table 310-16 (75
o
C)
120V
208V
240V
120V
208V
240V
1500*
20
15
15
12
14
14
1700
20
15
15
12
14
14
2000
25
15
15
10
14
14
2500
30
15
15
10
14
14
3000
35
20
20
8
12
12
3500
-
25
20
-
10
12
3800
-
25
20
-
10
12
4000
-
25
25
-
10
10
4500
-
30
25
-
10
10
5000
-
30
30
-
10
10
5500
-
35
30
-
8
10
6000
-
40
35
-
8
8
Table 5 - Electrical Specification
NOTE:
Before closing the switch to allow electric current to flow to
the water heater, make certain that the water heater is completely
full of water and that the cold water inlet valve is open. The heating
element will be damaged if they are energized for even a short time
when not completely immersed in water. When the switch is closed
the operation of the water heater is automatic. This water heater is
designed for operation as specified on the rating plate. All electrical
connections to the element and thermostat have been made at the
factory. DO NOT ALTER any of the internal wiring. Wiring connections
may loosen during shipment. Check all connections for tightness.
A. Provide a separate fused disconnect switch for each water heater.
B. Open cover door of the wiring connection box.
C. Bring the power leads from an adequately fused disconnection
switch (not furnished with the water heater due to varying state
and local codes) and use wire nuts to connect the power supply
wiring to the wires inside the water heater connection box. Where
long runs of wiring occur, local ordinances or the utility company
necessitates that an increase in size may be required.
D. This water heater must be properly grounded. A ground lug
is provided within the electrical control box for connection of a
properly sized ground.
E. Close the cover door of the wiring connection box.
Part 4 - Wiring
All wiring must conform to local codes and/or the latest edition of
National Electrical Code ANSI/NFPA 70. Refer to wiring diagrams in
this manual for proper wiring connections.
When making electrical connections, ensure that:
• The electrical supply has the proper overload fuse or breaker
protection.
• Wire sizes and connections comply with all applicable codes.
• Wiring is enclosed in approved conduit (if required by local
codes).
• The water heater and electrical supply are propertly grounded.
All wiring should be done by a qualified licensed electrician or the
local electric utility.
Label all wires prior to disconnecting them when servicing the
appliance. Wiring errors can cause improper and dangerous
operation. Failure to follow these instructions may result in
property damage or personal injury.
Install wiring and electrically ground appliance in accordance
with the authority having jurisdiction or, in the absence of such
an authority, follow the National Electrical Code, NFPA 70, and/
or CSA C22.1 Electrical Code-Part 1 in Canada. Failure to follow all
applicable local, state, and national regulations, mandates, and
building supply codes for guidelines to install the electrical power
supply could result in property damage, serious personal injury, or
death.
Jumping out control circuits or components WILL VOID product
warranty and can result in property damage, personal injury, or
death.
It is of extreme importance that this unit be properly grounded. It
is very important that the building system ground is inspected by
a qualified electrician prior to making this connection. Electrical
power must only be turned on when the appliance is completely
filled with cold water. Failure to follow these instructions could
result in component or product failure, serious injury, or death.
ELECTRICAL SHOCK HAZARD – To ensure safety, turn off electrical
power supply at service entrance panel before making any electrical
connections to avoid possible electric shock hazard. Failure to do so
could result in property damage, serious personal injury, or death.
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.
