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The content on this page is intended for use by qualified
installation/service personnel ONLY.
WARNING: Improper adjustment,
alteration, service or maintenance can
cause property damage, personal injury,
or death.
!
DANGER: Hotter water increases the
potential for Hot Water SCALDS.
Time/Temperature Relationship in Scalds
Water Temperature
Time To Produce a Serious Burn
120°F (49°C)
More than 5 minutes
125°F (52°C)
1-1/2 to 2 minutes
130°F (54°C)
About 30 seconds
135°F (57°C)
About 10 seconds
140°F (60°C)
Less than 5 seconds
145°F (63°C)
Less than 3 seconds
150°F (66°C)
About 1-1/2 seconds
155°F (68°C)
About 1 second
Table courtesy of Shriners Burn Institute
Maximum Temperature Adjustment by
the Main Remote Control (UMC-117)
Required adjustment for up to 140°F (60°C)
water temperature settings for Residential
product.
WARNING:
Refer to scald potential
warnings on page 4 before making adjustment.
Changing this setting is done at your own risk.
!
DO NOT execute the following adjustment if the
setting of up to 140°F (60°C) is not required.
Follow the instructions below if it is determined that
a setting of up to 140°F (60°C) is required.
Turn on the remote control. Turn off the gas
and water shutoff valves.
Press the UP arrow temperature adjustment
button on the remote control for several times
and set the temperature at 120°F (49°C).
Press and hold the UP button on remote
control for more than 5 seconds. Number
(120) on the display of the remote control will
begin to blink.
While the number is blinking, push the UP
arrow temperature adjustment button and
the Down arrow temperature adjustment
button at the same time. The display of the
remote control will show “140”.
Push the UP or Down button to set desired
temperature.
Turn on the gas and water shut off valves.
Check and ensure safe operation and
performance of the water heater.
See steps below to LIMIT maximum water
temperature setting to 120°F (49°C).
Turn on the remote control. Turn off the gas
and water shutoff valves.
Press the Down arrow temperature adjustment
button on the remote control for several times
and set the minimum setting temperature
(100°F(38°C) or 85°F(29°C)).
Press and hold the Down button on the remote
control for more than 5 seconds. Number on the
display of the remote control will begin to blink.
While the number is blinking, push the Down
arrow temperature adjustment button and the UP
arrow temperature adjustment button at the same
time. Number of the display of the remote control
will stop blinking.
Push the UP or Down button to set desired
temperature.
Turn on the gas and water shut off valves.
Check and ensure safe operation and
performance of the water heater.
°F
PRIORITY
POWER
ON/OFF
Higher (Hotter)
Lower (Cooler)
100 102 104 106 108 110 112 114 116 118 120
38 39 40 41 42 43 44 46 47 48 49
85
29
125* 130* 140*
°F
52* 54* 60*
°C
In Use Indicator
(Lit during operation)
LED Display
(Displays water
temperature and error
codes)
ON/OFF
Indicator
Temperature
Adjustment
Buttons
Priority Indicator
Notice:
Display shows
°F only.
