The following installation manuals are available for the ColdAIR range:
ColdAIR WA & RA - Installation Manual - https://www.reznor.co.uk/wp-content/uploads/2023/12/3.-703501-ColdAIR-Instruction-Booklet-NN-EN-1015-A3F-GBCAIR1801015.pdf
Coldair WA RA & RC - Installation Manual - March 2020 - https://www.reznor.co.uk/wp-content/uploads/2023/12/Reznor-Coldair-WA-RA-RC-Installation-Manual-EN-2020-03-703501-Iss-A.pdf