The following product guides are available for the Apollo Quartz Glow Electric 9kW Radiant Heater -Triple Double Linear Tube - 3ph - Ivory (QHL90-3):
Quartz Glow - Product Guide(https://www.reznor.co.uk/wp-content/uploads/2023/12/Reznor-Nortek-Quartz-Glow-Sales-Brochure-Jan-20.pdf)