INSTALLATION/OPERATING
INSTRUCTIONS FOR CENTRAL HEATING
PROGRAMMERS - T612-C & T634-C
Securing screws
Securing screws
Advance
Channel display
Current time
No of ON/Off
per channel
Channel
state display
Boost
Set time
Wiring terminals
T634-C
Central Heating Programmer
7 Day Electronic - 1-4 Channe
l
(Diagram shown)
T612-C
Central Heating Programmer
7 Day Electronic - 2 Channel
The T634-C/T612-C programmer offers the equivalent of four or two separate
seven day timers in one slim, elegant enclosure. Each of the four or two channels
offers up to three programmed operating periods per day for each of the seven
days of the week, with a boost and advance available on each.
INSTALLATION AND CONNECTION SHOULD ONLY BE CARRIED OUT BY A
SUITABLY QUALIFIED PERSON AND IN ACCORDANCE WITH THE CURRENT
EDITION OF THE IEE WIRING REGULATIONS.
WARNING:
ISOLATE MAINS SUPPLY BEFORE COMMENCING INSTALLATION
INSTALLATION INSTRUCTIONS
FITTING THE MOUNTING PLATE
L N CH1 CH2 CH3 CH4
The mounting plate should be carefully removed from the timer by loosening the
two securing screws on the top of the timer and swinging out the mounting plate
away from the body of the timer. The mounting plate should be fitted with the
wiring terminals located at the bottom and in a position which allows the required
clearances around the mounting plate to allow re-fitting of the timer body.
WIRING BOX MOUNTING
The Mounting plate may be fitted directly on to a single gang steel flush wiring box
complying with BS4662, using two 3.5mm screws. The T634-C/T612-C
programmer is suitable for mounting on a flat surface only; it must not be located
on a surface mounted box or on unearthed metal surfaces.
Mains Supply
T612-C
T634-C
Mains Supply
E
LECTRICAL CONNECTIONS
All necessary electrical connections should now be made. Flush wiring can enter
from the rear through the aperture in the mounting plate. The mains supply
terminals are intended to be connected to the supply by means of fixed wiring.
The recommended cable sizes are 1.0mm
2
or 2.5mm
2
.
T
he T634-C/T612-C programmer is double insulated and does not require an Earth
connection but an Earth terminal is provided on the mounting plate for
terminating any cable Earth conductors. Earth continuity must be maintained and
all bare Earth conductors must be sleeved with green/yellow sleeving.
Ensure that no conductors are left protruding outside the central space
encompassed by the mounting plate, and there are no strands of loose
conductors protruding from the terminals.
INTERNAL WIRING DIAGRAM FOR T634-C and T612-C
An example circuit diagram is shown above. This diagram is schematic and should
be used as a guide only. Please ensure that all installations comply with the
current IEE regulations.
FITTING THE PROGRAMMER
Make sure the two captive screws on the top of the mounting plate are loose.
Locate the two lugs on the lower edge of the mounting plate into the two
corresponding apertures on the timer. Swing the top of the timer into position,
ensuring that the connection pins on the rear of the unit locate into the terminal
slots on the mounting plate. Tighten the two captive retaining screws.
OPERATING INSTRUCTIONS
This is a four/or two channel programmable timer. It is used for controlling home
appliances such as heaters, lighting systems and so on. This timer has 4 or 2
individual channels. Each channel works in automatic or manual operating mode.
LCD Display Layout
1. TIME FUNCTION
1.1 12hr and 24hr display format selection by pressing CLOCK and HOUR+.
The default is 24hr format.
1.2 Day, hour, minute are shown on the LCD.
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