Instruction Manual

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TABLE OF CONTENTS
A. Installation and mounting
1, Installation
2, Wiring
3, Mounting
B, Start/Reset
C, Normal Time Mode
D, Normal Time Setting
E, Factory Defined Programs
F, Set Own Program
G, Temporary/Permanent Override Mode
H, Control Off/Sleep Mode
I, Jumper Selection
J, Specification
ET 2 LCD Programmable Thermostat
A, Installation & Mounting:
1, Installation Location:
The thermostat should be mounted on an inner wall 1.5m above the floor in
a position where it is readily affected by changes in the ambient room
temperature. Prevent direct exposure sunlight and moisture. Do not place
this unit where air circulation is low, or where it is susceptible to rapid
temperature changes (e.g. near a door or window). Do not position near
heating/cooling appliances.
TFC Group LLP, Tower House,
Vale Rise, Tonbridge, Kent TN9 1TB
http://www.tfc-group.co.uk
ET2
Digital Programmable Thermostat
For
Weekday/Weekend Setting
INSTRUCTION MANUAL
2, Wiring:
There are three terminals at the bottom of the ET2, labelled as
“Com” (Common), “NO” (normally open) and “NC” (normally closed).
Connect the appliance to the “NO” and “Com” terminals. Leaving the “NC”
terminal empty.
• Refer to the circuit diagram printed on rating label on the back of the
product.
• Push all wiring into wall prior to mounting to avoid trapping wires.
• The thermostat should be protected by the fused spur supplying the
heating system using a fuse with a current rating no larger than 5A.
3, Mounting:
Mount the ET2 using the screw accessories provided through slots/holes on
rear face of the unit.
Battery installation / Replacement:
Caution: Turn off electrical devices and disconnect the supply to any
connected appliances before installing or replacing batteries. Replace only
with the same (AAA Alkaline) or equivalent batteries. Do not dispose of used
batteries with household waste. Refer to your local area for correct disposal
method.
1, Pull out the battery draw.
2, Place new batteries taking note of
orientation of +/- on battery drawer.
3, Dispose old batteries properly.
4, Slide battery draw into position.
5, Check operation and press reset
if not functioning correctly.
B, Start/Reset:
1, After wiring and mounting, switch off all connected devices. Place 2
new AAA 1.5V alkaline batteries ensuring correct orientation of battery
polarity. LCD display will show.
2, Press ‘RST’ to reset. The ET2 is now ready to control the heater/cooler.
3, Switch on the heater/cooler. The heater/cooler will remain off until the
ET2 activates the output, with or displayed depending on
configuration for a heating or cooling application.
C, Normal Time Mode:
1, Temperature detection starts and LCD displays the room temperature.
2, If the battery is low, will be flashing. If has been flashing for 48
hours and the batteries have not been replaced, the ET2 will stop
measuring the room temperature and the LCD will go blank. The ET2 will
turn off the output and the heater/cooler will cease to operate. The
system will only function once the discharged batteries are removed and
new batteries are fitted.
3, In heating mode frost protection is activated automatically if the ambient
temperature falls below 5
0
C. Will show in the display and the output
will be forced ON for heating or OFF if the ET2 is configured for cooling.
4, If the ambient temperature is below 0
0
C “LO” will show in the display.
5, Above 40
0
C “HI” will show in the display.
D. Setting the real-time clock:
1, Press , the day of week (1-7) will flash 1=Monday. Press ,
To select the current day of the week.
2, Press , the hour will flash, press , to set the hour.
3, Press , the minute will flash, press , to set the minute.
4, Pressing will return back to step 1 (day setting).
5, Press to confirm settings and return to the default screen.
Note: If no buttons are pressed within 10 seconds the ET2 will return to the
default screen
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Caution:
Turn off the ET2 and any electrical devices that are to be
connected after installation. The installation must be carried
out by a qualified electrician and conform to current IEE
regulations.
(Figure 1)
Mains
Switching
Page