HTR-RF(20) – The wiring diagram.
LEGEND
 | Battery-powered |  | Wireless communication |
 | 230V AC power supply |  | Pump |
 | Fuse |  | Valve actuator |
 | Voltage free output |  | Temperature sensor |
 | Input terminals |  | 3-speed 230V AC fan |
 | 230V AC voltage output |  | A light bulb or another load |
 | Contact normally open |  | Thermoelectric actuator |
 | Contact normally closed |  | Time programmer |
 | NC/COM/NO switch |  | External normally open contact |
 | Boiler – Boiler connection * – Boiler’s contacts for ON/OFF thermostat (according to the boiler’s instructions) |  | Voltage converter |
