TDS on Fire Fighting equipment installation

Fire extinguisher purchased and they segregated the installation charges in the same invoice but they mentioned the HSN code service code hsn  that time I have to deduct the tds for the installation amount or deduct for the entire amount please clarify

If segregation of asset purchase expenses and installation expenses are visible on the face of the invoice even though under same HSN, TDS to be deducted only on the installation amount.