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9
RESETTING THE UPPER THERMOSTAT — It is recommended that the
upper thermostat remain at the factory setting for most normal applications.
All water temperature adjustments should be made at the lower thermo-
stat. If your application requires adjustment of the upper thermostat, it can
be changed as follows:
Make certain power to water heater is OFF before removing jacket
access panel(s) FOR ANY REASON. Failure to do so could result in
property damage, bodily injury or death!
A. Remove the upper thermostat snap-in access panel cover. Insert finger
into latch hole on the bottom of the cover, and push up to release the
latch. Then pull forward to remove the cover and insulation. (See figure
10.)
B. Remove the four (4) screws securing the thermostat access panel and
the two (2) thermostat insulation pads, exposing the thermostat. The
plastic personnel protector
should not be removed
.
C. With a small screwdriver, adjust the thermostat setting. This thermostat
is marked LOW / MED / HI. The 120°F factory set position (the recom-
mended setting) is at the 5 o’clock position (Refer to Figure 11). The
temperature settings range from approximately 110°F (LOW) to approx-
imately 170°F (HI). The MED position results in approximate water tem-
perature of 140° F.
D. Replace the two (2) pieces of fiberglass insulation over the thermostat
and attach the thermostat access panel.
E. Replace the single piece of fiberglass insulation inside the thermostat
access panel cover and snap in position.
NOTE: It is important that the fiberglass insulation is replaced to
maintain the water heater’s high energy efficiency performance.
RESETTING THE LOWER THERMOSTAT — It is recommended that any
water temperature adjustment be made at the lower thermostat only. If
your application requires adjustment of the lower thermostat, it can be
changed as follows:
Make certain power to water heater is OFF before removing jacket
access panel(s) FOR ANY REASON. Failure to do so could result in
property damage, bodily injury or death!
A. Remove the lower thermostat snap-in access panel cover. Insert finger
into latch hole on the bottom of the cover, and push up to release the
latch. Then pull forward to remove the cover and insulation. (See Figure
12.)
Operation
DANGER
!
Figure 10 — Removing Upper Thermostat Access panel.
Figure 12 — Removing Lower Thermostat Access panel.
Upper Thermostat
Access Panel Cover
Access Panel Cover
Thermostat
Insulation (2)
Cover
Insulation
Latch Hole
Thermostat
Access Panel
Lower Thermostat
Access Panel Cover
Access Panel Cover
Thermostat
Insulation (2)
Cover
Insulation
Latch Hole
Thermostat
Access Panel
Temperature Time to Produce Serious Burn
120° F. More than 5 minutes
125° F. 1
1
/
2
to 2 minutes
130° F. About 30 seconds
135° F. About 10 seconds
140° F. Less than 5 seconds
145° F. Less than 3 seconds
150° F. About 1
1
/
2
seconds
155° F. About 1 second
Table courtesy of Shriners Burn Institute
TIME / TEMPERATURE RELATIONSHIPS IN SCALDS
DANGER
!
Figure 11 — Upper Thermostat temperature adjustment.
Reset Button
Temperature Adjustment
Screw (Shown at Factory Set-
ting of approx. 120° F.)
LOW
MED
HI
LOW setting equals
approximately 110° F
water temperature.
MED setting equals
approximately 140° F
water temperature.
HI setting equals approxi-
mately 170° F
water temperature.
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