Fox Thermal FT3 - Mounting Instructions

Mounting Instructions - Compression Fittings
FT3 insertion style ow meters are mounted through a 0.531" (17/32") hole and a ¾" female NPT
branch outlet in the customer's pipe. Insertion style ow meters are not designed for use in pipes
smaller than 1½".
• Install the compression tting into the ¾" female NPT branch outlet.
• When installing in a 2" pipe or larger, install the end of the probe 0.87" (22.098 mm) past the
center line of the pipe (refer to Fig. 2.5).
• When installing into a 1½" pipe, carefully install the probe into the pipe until it touches the
opposite wall and pull back 0.2".
• Rotate the nut nger-tight.
• Further tighten the nut just enough until the tube will not turn by hand or move axially in the
tting.
• Mark the nut at the 6 o'clock position.
• While holding the tting body steady, tighten the nut one and one-quarter (1 ¼) turns to the 9
o'clock position. See Fig. 2.9.
Fig. 2.9: Proper Tightening of the Compression Fitting Nut
NOTE! Before removing a probe with compression tting, mark the tube at the back of the
nut, and mark a line along the nut and tting body. Use these marks when reinstalling the
probe. Reference the instructions on p. 28.
NOTE! When installing a probe with compression tting that has been tightened previously,
use the instructions on Page 28.
CAUTION! Once the compression tting is locked onto the probe, the probe can be
removed or rotated, but the insertion depth is locked in place.
CAUTION! For a 1½" pipe, do not tighten compression tting without 0.2” distance from
wall or damage to probe will occur.
CAUTION! If the stainless steel or Teon ferrules are not properly tightened, and/or the
recommended pressure is exceeded, the ferrules can slip on the stainless steel tubing
causing damage to the meter or bodily harm.
Installation | 27
Model FT3
Installation