
© 2014 521_D - 01/14
14 of 28
A Watts Water Technologies Company
HEAT ON
Heat is turned on.
COOL ON
Cooling is turned on.
FAN
The fan is turned on.
MODE HEAT
The heating system is
allowed to operate.
MODE COOL
The cooling system is
allowed to operate.
MODE OFF
The heating and cooling
systems are off.
SUN
Schedule operating at the
occupied temperature.
MOON
Schedule operating at the
unoccupied temperature.
WARNING SYMBOL
Indicates an error is present.
HOLD
Permanently holds the
temperature and overrides
the schedule.
MIN
The floor is at or below the
floor minimum temperature.
MAX
The floor has reached the
floor maximum temperature.
Home Screen
Symbols Description
User Interface
Sa
Floor
F
F
MIN
Heat On
Cool On
Room Floor
Heat Cool
Off
MAX
MODE
FrThWeTuMoSu
P
Mode Button
Change operation
from Heat, Cool
and Off.
Hold Button
Permanently
overrides the
schedule. Press
hold to cancel.
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