Spare yourself the worry and expense of a fire suppression system and order or have JC Refrigeration install one of their true high efficiency and MUCH SAFER condenser/compressors for the Norcold line:
https://jc-refrigeration.com/
I researched them thoroughly and have an appointment to have them upgrade my 1200 Norcold - that eats no less than 552 watts to run, or about a gallon of LPG each week - to their true 88 watt DC compressor.