Heat & Glo • FDN-4-SS, FDN-5-SS, FDN-6-SS, FDN-7-SS Installation Manual • 16400-9800 Rev. H • 11/19
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C. HORIZONTAL VENT SYSTEM CLEARANCES
ALL APPROVED VENTING
TOP
BOTTOM
SIDES
HORIZONTAL
1 inch (25mm)
1 inch (25mm)
1 inch (25mm)
D. WALL PASS-THROUGH - Follow all local codes for requirement of firestops.
B. PITOT TUBE INFORMATION
There is a 1/4" pitot tube mounted in the center of the flue collar and is
connected to the pressure switch (Figure 8B).
This monitors the pressure in the flue and is necessary for proper operation.
Take care to keep the end of the tube clean.
IMPORTANT: THIS TUBE MUST NOT BE BENT, CLOGGED,
REMOVED, OR ALTERED IN ANY WAY.
Pitot Tube is
mounted in the
center of the
flue collar
Figure 8B