Description
D-508F digital non-programmable thermostat is designed to control either
ambient(air) temperature (A Mode) or floor temperature (F Mode) or a
combination of ambient temperature with floor temperature limits(AF Mode). An
auxiliary remote sensor is provided to measure slab temperature in order to
control the floor temperature(within maximum and minimum limits in AF Mode). It
can also be used for sensing the outdoor temperature.
LCD Description
INSTRUCTION MANUAL
Digital Non-Programmable Universal
Thermostat D-508FRadiant Floor Heating
Installation
1. Look for a location which has a constant
temperature in the house and it is no near the
door entry of heater or air conditioning outlet.
The mounting height should be about five feet
above the floor.
2. Insert a screw driver into the slot located on the
right side of the thermostat to open the front
cover.
3. Set the slide switches on the back of the control
module if necessary. Default: AF mode, °F
display.
4. Place base over hole in wall and mark
mounting hole locations on wall using base as
a template.
5. Move base out of the way. Drill mounting holes and use the screws
provided to secure the base. Use plastic anchors if necessary.
6. Through the base opening, connect wires to the terminal blocks on the
base according to Figure 2 below.
7. Carefully line the thermostat up with the base and snap into place.
Wiring Diagram
R: 24VAC Hot
C: 24 VAC Common
S, S: auxiliary remote sensor(P-01)
1, 2: relay switch output
Note:
The sensor wires can be
extended by conventional wires.
R C S S 1 2
Figure 2
R C S S 1 2
Heating
Control
24 Vac
Input
Sensor
P-01
Slide Switch Configuration
The Slide Switches are located at the back of the control module(see Figure 1).
Temperature Display Switch(S1): to switch between°°.
Mode of Operation Switch(S2):
A: controls and displays the ambient temperature. Optional: connect external
sensor(P-01) for the display of outdoor temperature in the upper LCD - also
set Outdoor Sensor to ON in the setting mode.
F: controls and displays the floor temperature. Connect external slab
sensor(P-01).Also displays current ambient temperature in the upper LCD.
AF: controls and displays the ambient temperature. Maintains the floor
temperature within desired maximum and minimum limits. Connect external
slab sensor(P-01).Also displays current floor temperature in the upper LCD.
I
!
!
C and F
C
FAF F A
Figure 1
Setting Temperature(Setpoint)
Room
885
° °F C
SYSTEM
Heat
Off Heat On AF
Sensor Err
SET MODE
VIEW MODE
Backlit: On Off Auto
885
Room
Floor
OutDoor
888.8
888
Floor Max Min
Set
SYSTEM
Heat
Off Heat On AF
Sensor Err
SET MODE
VIEW MODE
Backlit: On Off Auto
888
Room
Floor
OutDoor
Current Temperature
Backlit mode
Unit of measure
Keypad lock Operation Mode(A, F or AF)
Heat contact is ON
Operation Mode
(eg. F Mode)
Current Temperature of
indicated area (eg. Room)
Current Temperature of
indicated area(eg. Floor)
related to
operation mode
System Mode
Down Key
Up Key
Set Key
Power Key
Home Screen Display During Operation
Power-up
As soon as the thermostat is powered, all the LCD segments are displayed.
Then it undergoes a series of tests before displaying the actual
temperature.
SETTING THE THERMOSTAT
QuickSet Feature:
Quickset allows the user to change the setpoint temperature instantly without
entering the setting mode. Simply press UP (increase) or Down (decrease)
key during the normal operating mode. When the Up/Down key is pressed, the
setpoint is flashing on the upper right hand corner of the LCD display to indicate
that the setpoint value can be changed. Press the UP/Down key again to
adjust the setpoint (press and hold for auto repeat function). Just walk away
when finish and it will return to normal operating mode after 30 seconds.
Setting Mode:
General Note:
!Press and hold the Up Key or Down Key to change the value continuously
(auto repeat function).
!To return to normal operating mode from the setting mode, press and hold
the SET key for 3 seconds. However, the system also returns to normal
operating mode if no key is pressed for 30 seconds.
!During the setting mode, symbol “SET MODE” is displayed on the upper
left corner of the LCD. Each time SET key is pressed, the data will be saved
into the EEPROM and advance to the next setting(parameter). If no
change of value is required, just press SET key once to go to the next step
(parameter).
Floor Minimum and Maximum limits(AF Mode only)
The thermostat generally turns On or Off to control the ambient temperature.
However, if the floor temperature drops below the set minimum floor
temperature limit, the thermostat will turn heating On regardless of the ambient
temperature. If the floor temperature rises above the maximum limit, the
thermostat will turn heating Off regardless of the ambient temperature to
maintain the floor within the desire limit.
This setting ensures a minimum floor temperature at all times. The maximum
limit is to avoid damage to your floor and for added safety.
Note: The floor minimum limit cannot be set to a higher value than the
maximum limit.
Do Not
Use
Room
885
SYSTEM
Heat
Off Heat On AF
Sensor Err
SET MODE
VIEW MODE
Backlit: On Off Auto
885
Room
Floor
OutDoor
888.8
888
Floor Max Min
Set
SYSTEM
Heat
Off Heat On AF
Sensor Err
SET MODE
VIEW MODE
Backlit: On Off Auto
888
Room
Floor
OutDoor
Indicates if current
temperature is Floor
or Room(Ambient)
Shows during
SET MODE
Shows during
VIEW MODE
Default: F
Default: AF
24Vac
Circuit
Isolated
End
Switch (2A)
(S1)
(S2)
