The following installation manuals are available for the Guardian GB range:
Guardian 1 Phase Electric Heat - Installation Manual - June 2021 - https://www.reznor.co.uk/wp-content/uploads/2023/12/Reznor-Guardian-GB-GR-and-GS-Installation-Manual-EN-2021-06-D301214-Iss-C.pdf
Guardian 1 Phase Electric Heat Signal Pro - Installation Manual - May 2025 - https://www.reznor.co.uk/wp-content/uploads/2025/05/D301375-Reznor-Guardian-1-Phase-Electric-Heat-Signal-Pro-Installation-Manual-EN-2025-04-Iss-3.pdf
Guardian 1 Phase Electric Heat Signal Pro - Installation Manual - November 2021 - https://www.reznor.co.uk/wp-content/uploads/2023/12/Reznor-Guardian-1-Phase-Electric-Heat-Signal-Pro-Installation-Manual-EN-2021-11-D301375-Iss-0.pdf
Guardian 1 Phase Electric Heat Signal Pro - Installation Manual - October 2025 - https://www.reznor.co.uk/wp-content/uploads/2025/10/D301375-Reznor-Guardian-1-Phase-Electric-Heat-Signal-Pro-Installation-Manual-EN-2025-10-Iss-4.pdf
Guardian GB-GR et GS, Manuel d'installation - Français - https://www.reznor.co.uk/wp-content/uploads/2023/12/Reznor-Guardian-GB-GR-GS-Installation-Manual-FR-2020-05-D301251-Iss-B.pdf
Reznor, Guardian GB GR & GS Installatie handleiding - https://www.reznor.co.uk/wp-content/uploads/2023/12/Reznor-Guardian-GB-GR-GS-Installation-Manual-NL-2020-07-D301250-Iss-B.pdf