Description
The Dinosaur Electronics 12VDC TDR is a microcontroller-based fan time-delay relay for compatible older RV furnaces with a separate standard 12 VDC ignition board. It controls blower timing during the heating cycle and the cool-down period.
Application & Fitment
- Intended application: Older 12-volt DC furnace systems that use a conventional separate ignition board and time-delay fan relay
- Start-up: Approximately 4-second delay before fan-motor power is applied
- Shut-down: Approximately 2-minute fan cool-down run after the heating cycle ends
Important circuit restriction: Do not use as a direct replacement in Duo-Therm 900/9000-series furnaces or any furnace with a ground-switched thermostat circuit unless a qualified technician has converted the thermostat controls to the required positive-side arrangement. Match the original relay wiring and furnace service documentation before installation.
Specifications
- Manufacturer: Dinosaur Electronics
- Part number: 12VDC TDR
- Product type: Furnace fan time-delay relay
- Voltage: 12 VDC
- Dimensions: 1.5 x 1.5 in.
- Construction: Potted, microcontrolled module
- Warranty: Limited 3-year manufacturer warranty
Propane-fired furnace electrical repairs should be performed by a trained RV service technician.
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