Can the MLR Retrofit on Older 1000 Series PHI Devices? February 17, 2016 13:24 Updated Answer Unfortunately, the MLR cannot retrofit the PHI 1000 series devices. Applies To MLR Additional Information Related articles 9300/F9300 Wide Stile RIM Exit Devices Motorized Latch Retraction, MLR, Wiring Instruction and Specifications Apex 2000 FAQ's