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What did you replace? Is this an A/C?
On the roof? If so, nothing special has to be be done other than replace it and use it according to the instructions. Keep the air filter clean and the air speed up and don't over do it on the cold setting. Give it time to cycle. Hope that is what you had in mind here. IF NOT, please get back to me with more clarification. All follow ups are included in our fee.
I am not familiar with that unit so I will opt out and let another tech offer something if they have another idea.