TFC Group IHT-GPT01 (24hr) & IHT-GPW01 (7day) - Manual (Page 2)

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Wiring Example:
Immersion Heater Connections.
Fig. 1
Fig. 2
Fig. 4
Tappets in OFF position
Tappets in ON position
Manual switch - Immersion Heater Timer
(IHT/T&IHT/W) only.
The manual switch can be moved to override the timed
selection:
· In position 1 the timeswitch is permanently ON
irrespective of tappet positions.
· In position 2 the timeswitch is operating on timed
control and will switch ON and OFF as determined
by tappet positions.
· In position 3 the timeswitch is permanently OFF
irrespective of tappet positions.
· The manual switch must be returned to position 2 to
restore the timed function.
· See figure 3 for diagram of switch selections.
Manual switch - General Purpose Timer
(GPT/T and GPT/W)
The timer incorporates a changeover switch. Therefore,
when in use as a general purpose timer, the manual
switch functions as follows:
· In position 1, the timeswitch will give permanent
output on terminal 4.
· In position 2, the output will switch between
terminals 4&5, as determined by tappet positions.
· In position 3, the timeswitch will give permanent
output on terminal 5.
· The manual switch must be returned to position 2 to
restore the timed function.
80.10.1055.7/07/01
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Fig. 3
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Connections:
Mains supply Immersion Heater
1 Neutral 1 Neutral
2 Link 4 Live
3 Link + Live
Earth Earth
Link 2 to 3 provided
3 4 1
M ~
2 5
Mains supply
(input)
Immersion Heater
(output)
NOTE : Do not connect unprepared stranded wires to
device. Use ferrules supplied to crimp stranded wire
terminations.