HMY110/HMY220
400-619-000-E 4/20/07 3/4
4.3 Automatic Mode
Use automatic mode if you want the thermostat to follow
a programmed schedule. At the start of a programmed
period, the temperature will change according to the
schedule you programmed.
To use the automatic mode, press the
Mode
button until
the clock icon appears on the screen. The current
period number will appear.
Pre-programmed schedule
The following schedule has been programmed at the factory using
the 5 +2 day programming method. One program is used for Monday
to Friday and another program is used for Saturday and Sunday. To
program a new schedule, see section 3.2.
Temporary Bypass
If you modify the temperature (using the
buttons) when the ther-
mostat is in automatic mode, the thermostat temporarily bypasses
the current programmed temperature. Your floor will remain at this
temperature for the next two hours. (The clock icon will flash dur-
ing this time.) You can cancel the bypass by pressing the
Mode
but-
ton.
4.4 Manual Mode
In manual mode, the programmed schedule is not
followed. Use this mode if you wish to set the
temperature manually.
To use the manual mode, press the
Mode
button until
the hand icon appears on the screen and set the
temperature using the
buttons.
Your floor will remain at this temperature until the
manual mode is turned off. To turn manual mode off,
press the
Mode
button until the clock icon appears.
4.5 Off Mode / Vacation Mode
Use the Off mode to cut power to the floor heating
system. This mode is useful in the summer or when
heating is not required for an extended period of time.
To place the thermostat in Off mode, press the
Mode
button until the message
OFF
appears on the screen.
After 5 seconds, the message will disappear and
current time and day will appear.
4.6 Configuring the Thermostat as a Power Regulator
The thermostat can be configured as a power regulator with no tem-
perature feedback (see section 5.1). This feature is useful in any of
the following conditions:
•
The temperature sensor is not connected to the thermostat.
•
You wish to control the heating power without accounting for the
floor temperature.
•
The temperature sensor is defective.
The thermostat will display the percentage of heating power instead
of displaying the temperature.
NOTE
: When the heating power is displayed instead of the tempera-
ture,
°F
or
°C
does not appear on the screen.
When configured as a power regulator, the numeric value on the
screen represents the
percentage
of the maximum output
not the
actual temperature
. To set the power, use the
buttons.
4.7 Error Codes
The following error codes can appear at the top of the display.
LO
: The measured temperature is below 32°F (0°C).
HI
: The measured temperature is above 140°F (60°C).
E1
: The temperature sensor is defective or not connected.
E2
: The temperature sensor is shorted.
5.1 Configuration settings
•
To access the configuration settings, simultaneously press and
hold the
Pgm
and
Day
buttons for 1 second.
•
To jump from one setting to the next, press the
Mode
button.
The configuration settings will appear in the order shown below
(from left to right).
•
To toggle between the selections, use the
buttons.
•
To exit the configuration settings, press the
button.
Periods
Temperature
Start Times
MO
TU
WE
TH
FR
SA
SU
P1
88°F (31°C)
6:00 a.m.
P2
74°F (23.5°C)
9:00 a.m.
--
P3
88°F (31°C)
5:00 p.m.
--
P4
74°F (23.5°C)
11:00 p.m.
r
Configuration
5.
Time
display
Temperature
display
Programming
method
Backlight
On
Power
regulator
Early Start
Configuration settings
Selections
NOTE:
The default settings are inside the gray cells.
Time display
12 h
24 h
Temperature display
°F
°C
Programming method
a
a. This setting specifies the schedule programming method (see
section 3.2).
5+2 days
7 days
Backlight On
b
b. When this setting is set to Y, the screen is permanently backlit.
When set to N, the backlight is activated for 12 seconds when a
button is pressed.
N
Y
Power regulator
c
c. Enable this setting (Y) to configure the thermostat as a power
regulator (see section 4.6).
N
Y
Early Start
d
d. Early Start can be used in Automatic mode only. When this func-
tion is enabled, the thermostat calculates the optimal time to start
heating in order to obtain the desired temperature by the set time.
The thermostat re-assesses the start time daily based on the pre-
vious day’s results.
Y
N
400-619-000-E (Nuheat) ENG.fm Page 3 Friday, April 20, 2007 1:32 PM
