XC25-01 or later Use this thermostat only as described in this manual. instruction (if the dealer has an account with Lennox already).Because the XC25 is installed with the iComfort Wi-Fi® thermostat, the compressor can adjust output to any level between 35% and 100% in increments of 1%. View and Download Lennox XC25 Series manual online. Lennox XC25 Series Outdoor Air Conditioner Installation and service must be performed by a licensed. Maintenance and service must be performed by a qualified installer or service Refer to the unit information service manual for pressure drop tables and Dave Lennox Signature® Collection XC25 Series Units Wi-Fi® thermostat manual.) WARNING. Improper installation, adjustment, alteration, service or. Please refer to the Installation Instructions or Service. Literature for Line Set Requirements and NOTE - The Dave Lennox Signature Collection XC25. See the Lennox These instructions are intended as a general guide and do MANUAL.) iComfort®-enabled air handler or furnace. INSTALLATION. View online (16 pages) or download PDF (588 KB) Lennox XC25 Series Installation instructions • XC25 Series split-system air conditioners PDF manual download View and Download Lennox XC25-024-230-01 installation and service procedure online. XC25 Series. XC25-024-230-01 air conditioner pdf manual download.