Rheem Single and Double Element Models Use & Care Manual page 4

To Electrical
Distribution Panel
Flexible Connectors for
Water Connections at
Tank Fittings
Shut-Off Valve in
Cold Water
Supply Line
To Cold Water
Supply
To Electrical Distribution Panel
(Use only Copper Conductors)
Figure 2. — Typical Installation (Pictured from rear of heater
with Top Panel and Insulation Pad removed).
WARNING
!
Tank MUST BE full of water before power is turned on. Heating element(s)
WlLL BE DAMAGED if energized for even a short time while tank is dry. The
water heater's warranty does not cover damage or failure resulting from
operation with an empty or partially empty tank. (Reference is made to the
limited warranty for complete terms and conditions.)
6. ELECTRICAL CONNECTIONS — A separate branch circuit with cop-
per conductors, overcurrent protective device and suitable disconnect-
ing means must be provided by a qualified electrician. All wiring must
conform to local codes or latest edition of the National Electrical Code
ANSI/NFPA 70.
The water heater is completely wired to the junction bracket inside
jacket at top front of water heater. An opening for
fitting is provided for field wiring connections. (Refer to Fig. 3)
The voltage requirements and wattage load for the water heater is
specified on the rating plate on front of heater.
Table 1 recommends minimum branch circuit sizing based on Na-
tional Electric Code. Refer to wiring diagram on back cover of this
manual for field wiring connections.
Installation
Grounding Screw
Wiring Junction
Bracket
Temperature & Pressure
Relief Valve
Anode
Relief Valve Discharge
Line to suitable open drain
Hot Water
Outlet to Fixtures
/ " or / " electrical
l 3
2 4
Temperature & Pressure
Relief Valve Coupling
Anode Location
FRONT OF WATER HEATER
Figure 3. — Location of water connections on water heater
tank. (Pictured with top insulation pad removed
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 iso-
lated.
The branch circuit wiring should include either:
A. Metallic conduit or metallic sheathed cable approved for use as a
grounding conductor and installed with fittings approved for the pur-
pose.
Recommended Over
P
Current Protection
Total h
(Fuse or Circuit Breaker)
Water a
Amperage Rating
Heater s
Wattage e 208V 240V
1 20
3,000
3 20
1 25
4,000
3 25
1 30
4,500
3 30
1 30
5,000
3 30
1 35
5,500
3 35
1 40
6,000
3 35
1 50
8,000
3 45
1 ---
9,000
3 50
1 ---
10,000
3 ---
1 ---
11,000
3 ---
1 ---
12,000
3 ---
Table 1. — Branch Circuit Sizing and Wire Size Guide Based
on N.E.C. ANSI / NFPA 70
4
Hot Water
Outlet Coupling
Copper Wire Size -
AWG Based on N.E.C.
Table 310-16 (75°C.)
277V 480V 208V 240V
20 15 15 12 12
20 --- 15 12 12
25 20 15 10 10
25 --- 15 10 10
25 25 15 10 10
25 --- 15 10 10
30 25 15 10 10
30 --- 15 10 10
30 25 15 8 10
30 --- 15 8 10
35 30 20 8 8
30 --- 15 8 10
45 40 25 8 8
40 --- 20 8 8
50 45 25 --- 8
45 --- 25 8 8
--- 50 30 --- ---
50 --- 25 --- 8
--- 50 30 --- ---
50 --- 25 --- 8
--- --- 35 --- ---
--- --- 30 --- ---
Cold Water
Inlet Coupling
Electrical
Junction
Bracket
277V 480V
14 14
--- 14
12 14
--- 14
10 14
--- 14
10 14
--- 14
10 14
--- 14
10 12
--- 14
8 10
--- 12
8 10
--- 10
8 10
--- 10
8 10
--- 10
--- 8
--- 10