Description
OP-IHTGPT 24-Hour Immersion Heater Timer – Surface Mounted
The OP-IHTGPT is a reliable 24-hour timer designed for immersion heaters and general-purpose time control applications. Engineered for surface mounting, it provides dependable daily scheduling using 15-minute captive tappet intervals, allowing precise control over heating cycles and other timed loads.
Rated for 16A resistive and 8A inductive loads, the OP-IHTGPT is well suited to the demands of immersion heaters and other higher-load appliances. Captive tappets ensure secure and straightforward programming, while multiple operating modes — Timed, OFF, and Constant — allow the timer to be adapted easily to different usage requirements.
The timer is fitted with volt-free SPDT contacts, offering versatile switching options for a range of control applications (link removable as required). Installation is supported by an earth park terminal and cable clamps, providing secure and tidy wiring during fitting.
Adding time control with the OP-IHTGPT helps reduce energy waste by ensuring immersion heaters operate only when required. This is particularly beneficial in properties using off-peak electricity tariffs, where heating can be scheduled during lower-cost periods. Controlled operation can also reduce wear on the heater, helping to extend appliance lifespan.
The OP-IHTGPT is intended for use with resistive and inductive loads and is not suitable for discharge or LED lighting without the use of a contactor. Its robust construction and simple programming make it a dependable solution for efficient, time-based control.
Full technical specifications, wiring details, and installation information can be found in the specification tab above.
Key features
- 24-Hour Timer : Customisable with 15-minute intervals
- Flexible Load Support : 16A resistive, 8A inductive
- Operating Modes : Timed, OFF, and Constant selection
- Volt-Free SPDT Contacts : Offers versatile switching options (remove link as needed)
This OP-IHTGPT 24 hour Immersion Timer is a practical choice for domestic heating systems where dependable operation, clear control and straightforward installation are important.



























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