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1. Set the Timer
Do not rotate the dial anti-clockwise as this will
damage the mechanism.
Rotate the minute hand clockwise until the arrowhead on the clock face aligns with the correct time
on the outer dial—see Fig. 1.
The dial shows the 24 hour clock. Note that 9 =
9:00 a.m., 21 = 9:00 p.m. When setting-up the 7
day version, align correct time on outer dial, within
current day sector of dial. Please note: on the
IHTGPW seven-day timer, the weekdays are printed around the edge of the dial in abbreviations of
three languages.
To set ON / OFF times, move all tappets between
Figure 1.
ON and OFF times required to the outer edge of the
dial. See Fig. 1.— to set ON at 7:30 a.m. and OFF
at 10:30 a.m. move all tappets to
outer position between 07:30 and 10:30 on the
dial. Set any other ON/OFF times in a similar manner.
2. Manual Override
Immersion Heater Timer
There is a three-position manual selector built-in to
the clock dial face. See Fig. 2.
Leave the selector in the middle-position for automatic control, when the output is ON or OFF according to the tappet settings. To switch ON manually, move the selector to position 1 (marked I on
the dial). To switch OFF manually, move the selector to position 3 (marked 0 on the dial).
The manual lever is a fixed selection. The output
will stay as selected until the manual lever is moved
once more.
General Purpose Timer
The timer incorporates a changeover switch. There-
fore, when in use as a general purpose timer, the
manual switch functions as follows:
In position 1, terminal 4 output is ON
In position 2, the output will switch between terminals 4&5, as determined by tappet positions.
In position 3, terminal 5 output is ON.
1 = ON
2 = AUTO
3 = OFF
Figure 2.
3. Installation guide
Installation must be carried out in accordance with
the current edition of the I.E.E. Wiring Regulations.
It is recommended that installation is undertaken
only by a qualified electrician.
Undo the recessed cross-head screws ‘a’ (see Fig.
3). Lift off the outer housing. Grip the square base
of the timer and pull the timer away from the backplate.
Drill the wall to suit the three backplate mounting
holes b, c, & d. Do not mount the timer on an unearthed metal or metallised surface.
Secure to wall surface using suitable wall plugs &
screws.
Immersion Heater Control
Connect wiring according to the wiring diagram.
See Fig. 4. When installing for immersion heater
control ensure the brass link is correctly positioned
and retained as pre-fitted to terminals 2 & 3.
General Purpose Control
Removal of the brass link converts the timer switch
to a volt-free configuration.
Secure cable and flex using clamps provided (see
Fig. 5.) Do not connect unprepared stranded wires.
Use ferrules supplied to crimp stranded wire terminations.
Means of disconnection with minimum 3mm contact
separation in all poles must be incorporated in the
fixed wiring mains supply.
Push timeswitch module onto backplate, ensuring
good engagement of tab terminals. Refit housing
to backplate.
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Figure 3.
Connection:
Supply:
Live - terminal 3
Neutral - terminal 1
Load:
Live - terminal 4
Neutral - terminal 1
Link:
Terminals 2 - 3
Figure 4.
Wiring for immersion heater or mains-
switching applications
Earth - Earth park
Wiring for general purpose use
(as a volt-free control)
To convert the timer for volt-free applications,
remove the brass link. Connect mains to terminals
1 & 2 (not polarity conscious). Switching will occur
across terminals 3, 4 & 5.
Common - terminal 3
Normally open (ON) - terminal 4
Normally closed (OFF) - terminal 5
Earth - Earth park terminal
Figure 5.
4. Specification
Motor: 220-240V AC 50Hz
Temperature rating T45
Switch type: changeover
Rating:
16A resistive / 8A inductive
Not suitable for direct switching of lighting
types: HID, SON, LED—use a contactor
Class II control / Protection class IP20
Complies with European Norm
EN 60730-1: 2011
Automatic Electrical Controls for
Household and similar use,
and European Directives:
LVD; EMC; RoHS
www.tfc-group.co.uk
TFC Group LLP Tonbridge TN9 1TB
Time Switch
For immersion heater control
and general purpose use
User instructions
OP-IHTGPT 24 Hour Synchronous
Min switching 15 minutes
OP-IHTGPW 7 Day Synchronous
Min switching 2 hours
(product version is shown on the rating label)
1. Set the timer
2. Manual override
3. Installation guide
4. Specification
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