TR/HL and SMART Series
Thermostat Replacement Instructions
9
Adjusting the Water Heater Thermostat
Water heater thermostat is factory set to its low-
est temperature. This may or may not be suit-
able for your needs.
Turn thermostat knob
clockwise
to
increase
water temperature.
Turn thermostat knob
counter-clockwise
to
decrease
water temperature.
Studies have indicated that dangerous bacte-
ria, including legionella, pneumophila, can
form in the potable water distribution sys-
tem if certain minimum water temperatures
are not maintained. Contact your local
health department for more information.
•
Check water temperature at a hot water faucet
immediately after first heating cycle. Further
temperature adjustment may be necessary as
water heating system is used. Recheck water
temperature at faucet after adjustment.
•
When adjusting thermostat, be sure boiler limit
control is set at a minimum of 20ºF higher than
the desired domestic water temperature.
WARNING
P ha
s e
I I I
-
P
h
a
se
III
- Pha
se
III
-
P
h
a
s e
I I I
-
Temperature
Down
Temperature
Up
Temperature
Up
Temperature
Down
TR Series Knob
HL Series Knob
SMART Series Knob
2008-3 P3 TR/HL & Smart Therm. Repl.
Date: 6/9/09