CT Manual 1-up - Columbia Boiler

Install the plate assembly in the boiler, evenly spaced as possible. Set the yoke over thebolt, install the nut and make it hand tight to keep the plate from moving.Using the correct size socket wrench, tighten the nut one quarter turn. See Figure 7. If thegasket leaks while the pressure is being brought up on the boiler, tighten the nut onlyenough to stop leaking. See Figure 8.Check the gaskets for leakage for the next three days after installation and if leakage isdetected tighten only enough to stop it.WARNING:EXCESSIVE TIGHTENING WILL FLATTEN OUT THE GASKETS TO A POINTWHERE THEY WILL NO LONGER BE ABLE TO SEAL. DO NOT TIGHTEN MORETHAN IS REQUIRED TO SEALIMPROPER PRESSURE ON GASKET OF HANDHOLE PLATEFigure 8Cleaning the Flue PassagesUnder normal operating conditions the flue passages do not need to be cleaned. If poorcombustion has been experienced and soot has built up on the flue passages they can becleaned following this procedure. Before cleaning have your boiler technician check thestack temperature and combustion efficiency to make sure that cleaning is necessary.Do not disassemble the jacket top ring without first obtaining a millboard top gasket. Thisgasket can become brittle over time and will be impossible to reinstall after removing. Thiscan cause combustion gasses to leak and can cause a dangerous situation. If your boilerwas built after February 1991 you will also need an upper hand hole gasket, part number480210.FM-148 COLUMBIA BOILER COMPANY, REV 6-06- 28 -