HMI Hoyme TMADP – 1103 – TWP
This TMADP-1103-TWP adaptor with three Relays and a 24Vac Interval Timer, together with a Central Ventilation Switch, acts as an automatic/manual control center to simultaneously turn on a principal Exhaust Fan, turn on a Furnace Fan, and open a Fresh Air Inlet Damper (If used). In addition, this adaptor also opens the inlet damper during Furnace firing.
Installation Instructions – Printer friendly (pdf)
Instructions for Timer alone – Printer friendly (pdf)