Fox Thermal FT3 - Welding Branch Fitting to Pipe

CENTERED
PIPE
CENTERLINE
PIPE
CENTERLINE
OFF CENTER
DIA. 0.531
HOLE
DIA. 0.500
PROBE
DIA. 0.531
HOLE
DIA. 0.500
PROBE
CORRECT
INCORRECT
BRANCH, FEMALE,
3/4" NPT
BRANCH, FEMALE,
3/4" NPT
PIPE PIPE
Welding Branch Fitting to Pipe
The probe of the FT3 must be installed perpendicular in the pipe to measure ow accurately. Use the
following steps to ensure that the ¾" branch tting is correctly welded to the pipe.
Directions:
1. Drill a 0.531" (17/32") hole inside the tting through the wall of the pipe (1 wall only).
2. Assemble the compression tting and branch tting hand tight onto the probe of the FT3.
3. Insert the probe into the hole in the pipe and use the FT3 probe and compression tting to align
the branch tting with the hole and the probe perpendicular to the pipe.
4. Tack-weld the branch tting carefully onto the pipe.
• Before welding the tting completely, verify the probe is aligned to the center of the pipe and
the hole is centered in the branch tting (see Fig. 2.4).
5. To verify that the correct hole position has been achieved, carefully slide the 0.50" sensor in and
out of the branch tting and 0.531" hole.
WARNING! Do not force the 0.50" sensor through the 0.531" hole. Forcing it through the
hole can damage the probe!
6. Verify that the temporary weld of the branch tting positions the probe window on the pipe's
centerline.
• Fig. 2.4 shows an incorrect welding of the branch tting, causing the 0.50" sensor to be "o
center".
7. Once the branch tting is aligned properly, remove the 0.50" sensor from the branch tting and
nish welding. Then verify the probe is still aligned with the center of the pipe.
8. Set the depth of the ow meter (see "Fig. 2.5: Insertion Sensor Depth in Pipe" on page 24).
• Do not tighten compression tting until proper depth of ow meter is determined.
Fig. 2.4: Alignment of Branch Fitting
Installation | 23
Model FT3
Installation