Using the local / remote switch toggle to the local position. The green led light will turn on. Using the mode button toggle the switch to heat or cool as required. The green led will turn on and indicate the working mode. Push the start button on the GR03 display keypad for five (5) seconds. The led will come on and indicate the new unit status. The unit will begin to start up if in local mode and no accessory controls have been added.
Optional controls include the pr3, the PRD1, supernode / BMS with accessories, microchiller / BMS with accessories and multichiller/ BMS with accessories. NRL units equipped with BMS controls must be switched from local to remote after startup for the first time.