Rheem Single Element Use & Care Manual page 15

To increase the water temperature, it
is recommended to adjust the bottom
thermostat only.
To decrease water temperature, all
thermostats on the unit need to be
adjusted to the lower setting.
HIGH
LOW
MED
TURN OFF
POWER
BEFORE
SERVICING
Top Thermostat or
Single Thermostat
Models
LOW ≈ 90°F (32° C) Water Temperature
MED ≈ 120°F (49° C) Water Temperature
HIGH ≈ 150°F (66° C) Water Temperature
It is important that the fiberglass insulation is
replaced to maintain water heater's performance and
safety.
If adjustment is necessary...
Reset button
Thermostat dial
pointer
15 0°F
(32°C)
(66°C)
(52°C)
12 5°F
TURN OFF
POWER
BEFORE
SERVICING
Thermostat
protective
cover
Bottom Thermostat
(Dual Thermostat
Models)
Time/Temperature Relationship in Scalds
Temperature
120°F (49°C)
125°F (51°C)
130°F (54°C)
135°F (57°C)
140°F (60°C)
145°F (63°C)
150°F (66°C)
155°F (68°C)
Table courtesy of Shriners Burn Institute
Turn off the power to the water heater.
!
the water heater is "OFF" before
removing any jacket access panel for
any reason. Failure to do so could result
in property damage, bodily injury, or
death.
Remove the snap-in access panel
cover. Insert finger into latch hole on
the bottom of the cover and push up to
release the latch. Pull forward and
remove the cover and insulation.
Remove the (4) screws that secure
the jacket access panel to the unit.
Remove the jacket access panel and
insulation exposing the thermostats.
Use care when removing insulation
90 °F
pads.
The thermostat protective cover should
not be removed.
Using a small screwdriver, set the
thermostat dial pointer to the desired
temperature by turning the screw. Do
not pry or move the white plastic
pointer.
Replace the rectangular insulation and
thermostat access panel. Secure the
panel to the unit using the (4) screws
provided. Tighten the screws until only
snug.
Replace the access panel cover and
insulation and snap in position.
Turn on the power to the water heater.
Time To Produce a Serious Burn
More than 5 minutes
1
1
About 30 seconds
About 10 seconds
Less than 5 seconds
Less than 3 seconds
About 1
About 1 second
DANGER: Make certain power to
/ to 2 minutes
2
/ seconds
1
2
15