A, Installation & Mounting:
1, Installation Location:
The thermostat (Transmitter) 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.
3
Caution:
Turn off the ET4 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.
TFC Group LLP, Tower House,
Vale Rise, Tonbridge, Kent TN9 1TB
http://www.tfc-group.co.uk
ET4
RF Thermostat
INSTRUCTION MANUAL
1
Transmitter 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.
ET4 Installation
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
(RST) if not functioning correctly.
5
(Figure 1)
2, Wiring:
There are four terminals on the receiver. L , N , 1 & 2.
Volt free connection:
If connecting to a volt free system 220-240 VAC should be connected to
L & N and the switched pair into terminals 1 & 2. If the circuit has a send
and return, the send should be connected to terminal 2 and the return to
terminal 1.
Mains switching:
Connect 220-240 VAC to L & N, Link Live (L) to terminal 2. Terminal 1
gives a 230V AC switched live output when heating is in demand.
•
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 a fuse with a current rating no
larger than 10A.
3, Mounting:
Mount the ET4 Thermostat using the screw accessories provided through
slots/holes on rear face of the unit. Mount the receiver into back-box
provided.
4
ET4 RF Programmable Thermostat
1, The system includes one wireless thermostat controller (Tx) plus one RF
receiver (Rx).
2, Transmits up to 20 meters indoors.
3, Communicates at 433.92MHz(USA/European Standard) and is designed
for unlicensed operation under FCC Part 15.
Warning:
1, There may be a dead zone in the RF communication. That means the
receiver may not be able to receive the message from the transmitter.
Before the installation, check the communication first. If the
communication fails, relocate the wireless thermostat.
2, If there is interference in communication, Follow the set-up procedure to
change the coding between the RF thermostat and receiver.
3, It is recommended that the RF thermostat and Receiver are mounted at
least 2 meters from electrical devices such as, radio, TV, PC etc. Do not
mount the RF thermostat or receiver on metal wall boxes as this will
interfere with the RF signal and reduce the range.
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TABLE OF CONTENTS
A. Installation and Mounting
1, Installation
2, Wiring
3, Mounting
B, Start/Reset
C, Normal Operation
D, Setting Clock
E, Factory Defined Programs
F, Setting Own Program
G, Override Settings
H, Temporary / Permanent Override Functions
I, Power Off / Standby Function
J, Jumper Options
K,Jumper Locations
L,Communication Set-up (pairing)
M,Specifications
N,Terminal Connecting Block Label
Page
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 ET4 is now ready to control the heater/cooler.
3, Switch on the heater/cooler. The heater/cooler will remain off until the
ET4 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 ET4 will stop
measuring the room temperature and the LCD will go blank. The ET4 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.
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