Customer Service FAQs Do you have wiring schematics for multiple heaters / controllers?

Do you have wiring schematics for multiple heaters / controllers?

Herschel Infrared heaters are relatively easy to install. However, we do frequently get asked questions about wiring schemas for more complex installations, for example multiple panels in multiple rooms. We always recommend using a qualified electrician, but the following schematics should help clarify wiring requirements.

 

Simple installation schematic – one panel, one controller, single room

For simple panel installations using either the Herschel iQ system or the XLS control system, our recommendation is to make the control receiver attachment after the fused spur. (When using MD01 Hard wired thermostat, the wiring connection to and from the controller should be made here too).

The actual temperature controller itself should be placed where it can measure a sensible average temperature in the room.

For the iQ Control system only, it is possible to make a wiring connection for the controller before the fused spur, but this applies only if the R1 receiver is being commanded by a T1 controller, or when an MD01 controller is being used and applies mainly for multiple panel / more complex scenarios. In all other simple configurations, the Receiver should be wired after the fused spur.

 

Simple Wiring Schematic

Advanced installation schematic – multiple panels, single controller, single room

This scenario does not apply to Herschel Select XLS panels with their built-in Smart-R receivers. These panels would all be installed on individual fused spurs and a single XLS Thermostat can be placed in the room where it can measure a sensible average temperature. The XLS controllers all draw power independently from the panels.

However, the below schematic represents a very common scenario for Herschel iQ controllers operating either the Inspire panel range or Herschel space heaters.

In this scenario multiple heaters are required to be switched from a single herschel iQ controller in one room.  Because it is possible that the heating load will exceed the amperage of the R1 (10 Amps) or MD01 (16 Amps) then a suitably rated contactor must be used to handle the total heating load and the Herschel R1 receiver or MD01 Hard-wired thermostat would be used to switch the contactor before the individual spurs to the heaters. 

The actual temperature controller itself (T1 or MD01) should be placed where it can measure a sensible average temperature in the room.

Advanced wiring schematic

 

 

Advanced installation schematic – multiple panels, multiple controllers, different rooms

This scenario does not apply to Herschel Select XLS panels with their built-in Smart-R receivers. These panels would all be installed on individual fused spurs and the XLS Thermostats can be placed in each room where they can measure a sensible average temperature. The XLS controllers all draw power independently from the panels.

However, the below schematic represents a common scenario for Herschel iQ controllers operating either the Inspire panel range or Herschel space heaters in multiple combinations in separate rooms.

In this scenario the heating load for each room would be controlled via a suitably rated contactor controlled by the Herschel R1 receiver or the MD01 hard-wired thermostat for each room.  The heaters would still be placed on individual fused spurs in each room.

The actual temperature controller itself (T1 or MD01) should be placed where it can measure a sensible average temperature in each room.

Advanced wiring schematic - multiple panels, controlls, separate rooms