18
Installation Instructions
NOTE: This guide recommends minimum branch
circuit sizing based on the National Electric Code.
Refer to wiring diagrams in this manual for field wiring
connections.
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.
If local codes require external application of insulation
blanket kits, the manufacturer’s instructions included
with the kit must be carefully followed.
Application of any external insulation, blankets or
water pipe insulation to this water heater will require
careful attention to the following:
• do not cover the temperature and pressure-relief
valve.
• do not cover access panels to the heating elements.
• do not cover the electrical junction box 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 the insulation blanket.
• do not block the air inlet outlets below and in the top
covers.
bRANCH CIRCUIT SIzING GUIDE
Total Water
Recommended Over-Current Protection
Heater Wattage
(fuse or circuit breaker amperage rating)
208V
240V
277V
480V
3,000
20
20
15
15
4,000
25
25
20
15
4,500
30
25
25
15
5,000
30
30
25
15
5,500
35
30
25
15
6,000
40
35
30
20
8,000
50
45
40
25
9,000
–
50
45
25
10,000
–
–
50
30
11,000
–
–
50
30
12,000
–
–
–
35
Typical vertical
piping arrangement
Typical horizontal piping
arrangement
Total Water
Copper Wire Size AWG based
Heater Wattage
on N.E.C. Table 310-16 (167°f/75°C.)
208V
240V
277V
480V
3,000
12
12
14
14
4,000
10
10
12
14
4,500
10
10
10
14
5,000
10
10
10
14
5,500
8
10
10
14
6,000
8
8
10
12
8,000
8
8
8
10
9,000
–
8
8
10
10,000
–
–
8
10
11,000
–
–
8
10
12,000
–
–
–
8
