Azel D-508F Instruction Manual

INSTRUCTION MANUAL

Digital Non-Programmable Universal

Thermostat D-508FRadiant Floor Heating

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.

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.

R C S S 1 2

LCD Description

Shows during
SET MODE

Shows during
VIEW MODE

Indicates if current
temperature is Floor
or Room(Ambient)

SET MODE

SET MODE

SET MODE

SET MODE
VIEW MODE

VIEW MODE

VIEW MODE

VIEW MODE

Floor Max Min

Floor Max Min
Room

Room

OutDoor

OutDoor

OutDoor

OutDoor

SYSTEM

SYSTEM

SYSTEM

SYSTEM

888.8

888.8

Heat

Heat

Heat

Heat

Off

Off

Off

Off

Keypad lock

Floor

Floor

Floor

Floor
Room

Room

Room

Room

Sensor Err

Sensor Err

Sensor Err

Sensor Err

Set

Set

885

888

885

888

Backlit: On Off Auto

Backlit: On Off Auto

Backlit: On Off Auto

Backlit: On Off Auto

Heat On

Heat On

Heat On

Heat On

AF

AF

AF

AF

Operation Mode(A, F or AF)

885

888

885

888

° °F C

Backlit mode

Unit of measure

Current Temperature

Home Screen Display During Operation

Current Temperature of
indicated area (eg. Room)

Current Temperature of
indicated area(eg. Floor)
related to
operation mode

System Mode

Power Key

Set Key

Setting Temperature(Setpoint)

Operation Mode
(eg. F Mode)

Heat contact is ON

Down Key

Up Key

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° ° .

(S1)

C and F

C

F

Default: F

AF F A

(S2)

Default: AF

Figure 1

!

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

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.

Do Not

Use

24 Vac

Input

Sensor

P-01

Heating
Control

24Vac
Circuit

R C S S 1 2

Isolated

Figure 2

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.

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.

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).

End

Switch (2A)

Steps

Procedures

Description

LCD Display

Step 1

To start setting, press the SET key for 3 seconds to access the setpoint mode. The LCD
will display the current setpoint (flashing). Then press either the Up key to increase or
the Down key to decrease the setpoint to the desired setting. An example of LCD
display in AF mode is shown.

Setpoint Temperature

Default setting: 70 F(21 C)
for A or AF mode, 82 F(28 C)
for F mode.

° °

° °

Step 2

Press SET key again to access the differential mode. The LCD will display the current
differential (blinking). Then press either the Up key to increase or the Down key to
decrease the differential to the desired setting. Selection value: 0.5, 1.0, 1.5, 2.0

Differential Temperature

Default setting: 1 F(1 C)° °

Step 3

(A mode only,
otherwise, skip
this step)

Press SET key again to access the Outdoor sensor. LCD will display the current
setting: Off (blinking) Then press either the Up key or Down key to toggle between
On and Off.

Outdoor sensor: On or Off

Default setting: Off

Step 4

(AF mode only,
otherwise skip
this step)

Press SET key again to access the Maximum Floor limit. The LCD will display the
current setting (blinking). Then press either the Up key to increase or the Down key
to decrease the limit to the desired setting.

Floor maximum limit

Default setting:
82 F(28 C)° °

Step 5

(AF mode only,
otherwise skip
this step)

Press SET key again to access the Minimum Floor limit. The LCD will display the
current setting (blinking). Then press either the Up key to increase or the Down key
to decrease the limit to the desired setting.

Floor minimum limit
Default setting: 40 F(5 C)° °

Step 6

Press SET key again to access the System Mode. LCD will display the current
mode: Heat (blinking) Then press either the Up key or Down key to toggle between
Heat and Off.

System Mode: Heat or Off

Default setting: Heat

Step 7

Press SET key again to access the backlit mode. LCD will display the current mode,
Auto (blinking). Then press either the Up key or the Down key to toggle etween the
Auto, On, Off designation. Press SET key again to go back to normal operating
mode. Note: In Auto Mode, backlit is turned on for 60 seconds when any key is
pressed.

b

Backlit mode: Auto, On or
Off

Default setting: Auto

Sensor Error

Er3

EEPROM (memory) data has been corrupted.
Replace the thermostat.

HHH

The measured temperature is above the upper
display range.

LLL

The measured temperature is below the lower
display range.

SET MODE

Error Messages

Sensor Error

Er1

Internal sensor is open or short circuit. Replace the
thermostat

Sensor Error

Er2

s External sensor is open or short circuit. Replace

the external sensor.

s In A mode, if outdoor sensor is set to ON and no

sensor is connected.

SET MODE

Room

70

SET MODE

SET MODE

1

SET MODE

SET MODE

OutDoor

SET MODE

SET MODE

Floor Max

SET MODE

SET MODE

Floor Min

Floor

SET MODE

SET MODE

SYSTEM

Heat

SET MODE

SET MODE

°F

AF

8if

°F

Sensor

A

°F

82

AF

°F

40

AF

Backlit: Auto

On

Setting

View Mode:

Press both Up and Down keys at the same time to review the current control
settings. “VIEW MODE” appears on the upper left corner of the LCD. Then

Down

Press (or Up) key to scroll through the settings in the same order as
Setting Mode (Setpoint, Differential, Heat/Off, Backlit etc.). To exit to normal
mode, press one more time from the last setting (e.g. Backlit) or
press both Up and at the same time. In this mode, the settings

Down key

Down keys

cannot be changed.

Turning On and Off the Heating System

:

In the heat mode, the relay is operated to maintain the temperature of the zone.
The control output will turn on when the sensor temperature falls to the setpoint
temperature minus half the differential amount. The control output will turn off as
the temperature rises to the setpoint plus half the differential amount.

During the normal operating mode:

! To disable or enable the relay output, press the power button once(eg. 1

second). LCD indicates a flashing “Heat” or “Off” under the “System”
heading. Press the power button again to toggle between “Heat” to enable
and “Off” to disable the relay output. After 30 seconds, the system returns to
normal operating mode.

! To completely power off the thermostat, press the power button for three

seconds. Press the power button again to turn back on the thermostat.

Keypad Lock:

Keypad can be locked to prevent tempering by unauthorized personnel. This is

done by pressing SET , Up and Down keys at the same time for three seconds.

A lock symbol appears on the lower LCD screen which indicates that the

keypad is locked. Then input from the keypad is disabled. Press SET, Up and

Down keys at the same time again for another three seconds to unlock the

keypad. The lock symbol disappears from the screen.

Factory setting: unlock

SPECIFICATIONS:

s

Display Format: Liquid Crystal Display(LCD) with backlit

s

Power Input : 24VAC , 50/60Hz, 0.5VA

Contact Rating: 2A 24VAC

s

s

Selectable display in °F or °C

Setpoint Range (ambient): . Default setting: 70 F (21 C)

s

s

Floor Temperature Control Range: 34-122°F(1-50°C)

Default setting:

s

Maximum Floor Temperature Limit(AF Mode): 35-122°F(2-50°C)

Default: 82°F(28°C)

s

Minimum Floor Temperature Limit(AF Mode): 34-121°F(1-49°C)

Default: 40°F(5°C).

s Temperature Display Range: -22 to 131°F(-30 to 55°C)

s

Switching Differential: A/F/AF Mode: 0.5/1.0/1.5/2°F( , Default: 1°F/1°C.

s

Sensor Probe: P-01 10k thermistors, 10" lead, 3/8"(9.5mm) OD x

13/16"(20.6mm) length
Operating Temperature: 32 - 122°F (0 - 50°C)

s

Dimension: 3.62"W x 2.99"H x 0.91"D(92 x 76 x 23mm)

s

Weight: 0.32 lb. (145 g)

s

Storage: -4 to 120°F (-20 to 50°C)

s

Material: Flame retardant plastic

s

Lockout mode to prevent tempering by unauthorized personnel

s

EEPROM memory retains control settings in the event of a power

s

failure.

±10%

82 F (28 C)

° °

?

34-100°F(1-38°C) ° °

°C)

AZEL

TECHNOLOGIES INC.

For more product information, please visit:

www.azeltec.com

P.O. Box 53138, 10 Royal Orchard Blvd.

Thornhill, Ontario, Canada L3T 7R9

Ph: 905-223-5567 Fax: [phone]

Email: [e-mail]