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1. Ensure that the cooling coil is not attached to the flame sensor during installation or removal
of the sensor. The cooling coil can apply an unwanted torque and cause disassembly and
malfunction of the flame sensor.
2. Apply a small amount of Never-Seez PN NG-165 to threads of sight tube prior to installation.
Be sure the Never-Seez applied to the sight tube is minimal and only applied below the 2
thread. If Never-Seez is applied to the face of the sight tube, upon heating, it can fog the
window of the Flame Sensor.
3. Inspect the window and clean with Isopropanol soaked swab. If required install hand tight
(3-4 Full turns) tighten with a wrench approximately 2.5 turns. Tighten further as required to
align keys on cable connector with slots in sensor connector
4. Slide cooling coil over Flame Sensor major diameter and orient tubes on the coil as required
for assembly. Tighten clamps 50-60 in. lbs. Install Swagelok fittings re-torque clamps to 50-
60 in. lbs. after first shut down
FS-9006OM – REV K
6
nd
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