Optional Elbow Or U-Bend Accessory Configuration - Re-Verber-Ray LD Series Installation Manual

LD Series
Slip-fit the radiant tube sections together until tightly connected (install the swaged end of each tube
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towards exhaust end). NOTE: If it is difficult to mate the tubes, they may be installed incorrectly.
Center tube clamps over the seam where two radiant tube sections connect. If necessary, rotate tube
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clamps so they will not interfere with the reflector end caps during expansion and contraction of
the heater.
Tighten tube clamp bolts to secure. When proper compression is obtained (40-60 ft-lbs. torque) the
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tube seam will create a visible mark on the tube clamp. NOTE: Excessive torque may damage the
tube clamp.
Determine the location of the burner control box and note the placement of the mounting chains.
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Figure 3.10 • Tube Connections
Tubes fit snuggly together and the
tube clamp is centered over the seam.
Correct Tube Connection

Optional Elbow or U-Bend Accessory Configuration

A 90 degree elbow or 180 degree U-bend accessory fitting may be installed in the radiant tube heating
system. Refer to Chart 3.3 for minimum distance requirements from the burner control box.
When installing an Elbow or U-Bend Accessory Fitting:
• The top clearance of an uncovered (no reflector) elbow or U-bend accessory fitting to combustibles
is 18 in.
• If operating the heater un-vented, separate the intake air to the heater from its exhaust products a
minimum of 4 ft., further separation may be necessary. Combustion air may also be supplied.
• A maximum of two 90° elbows or one 180° U-bend can be installed on a heater.
Figure 3.11 • Optional Tube Connections
3.0 Installation
The tube clamp is tight when the
torque is achieved (normally
when seam becomes visible).
90 Degree 3" Elbow
(P/N: DB-E6)
• Tubes: Optional Elbow or U-Bend Accessory Configuration
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Tubes are not fit snuggly
together and the tube clamp is
not centered over the seam.
Incorrect Tube Connection
180 Degree
3" U-Bend
(P/N: DB-TF1B)