Lennox R/LUF - Manuals

Page 2 # 44886B001 Thermostat Operation (when you have heating only) The thermostat is the only control you’ll need to set, as thefurnace is completely automatic. Just set the temperature to thedesired comfort level. Thermostat Operation (when you have heating and cooling) There are two switches loc...

# 44886B001 Page 3 Upflow Units To replace the filter in an upflow unit, refer to the followingdirections and Figure 2. Side Return To replace the filter in a furnace with an external filter rack orcabinet on either side of the furnace cabinet: 1. Turn off the power to unit. 2. The filter(s) may be ...

Page 4 # 44886B001 Limited Warranty August 1, 1997 This warranty gives you specific legal rights and you may have other rights which vary from state/province to state/province. Warrantor: Armstrong Air Conditioning Inc., 421 Monroe St., Bellevue, OH 44811 Armstrong Air Conditioning Inc. products are...