Thanks for the quick response! I just checked the install manual and Lennox says that a 70K furnace with 2 inch pipe and 6 bends should work. The maximum length they recommend is 58 feet with a concentric termination and ours is only 30.. ©2021 Lennox Industries Inc. Dallas, Texas, USA 1 - Set the thermostat to the lowest setting. Shut off. SLP98/99UH SLP98/99DF Pressure Switch Tubing to Gas Valve Figure 2 IMPORTANT Compounds used on threaded joints of gas piping must be resistant to the actions of liquified petroleum gases.
lennox-no heat pressure switch slp98. Jump to Latest 74K views 29 replies 21 participants last post by remyO Dec 16, 2024. B. becsnider Discussion starter. 1 post · Joined 2012 Add to quote; Only show this user #1 · Nov 18, 2012 (Edited by Moderator.. Lennox furnace tripping 228 code - pressure switch calibration and occasional high pressure switch not closing. High pressure switch not closing after inducer fires off. -Blew out all hoses.. Ive had countless slp98 furnaces with vent cal issues . Pacnw is bang on with the collector box it was a common issue on the early sl's not draining.