Tubes fit snuggly together and the
tube clamp is centered over the seam.
Tubes are not fit snuggly
together and the tube clamp is
not centered over the seam.
The tube clamp is tight when proper
torque is achieved (normally when
seam becomes visible).
Correct Tube Connection
Incorrect Tube Connection
90 Degree Elbow Bend
180 Degree
U-Bend
Figure 3.11
•
Optional Tube Connections
(P/N: TF1B)
(P/N: E6)
3.0
Installation
- GTD Series Installation, Operation, Maintenance and Parts Manual
Radiant Tube Assembly
Slip-fit the radiant tube sections together until tightly connected (install swaged end of each tube towards
exhaust end).
NOTE:
If it is difficult to mate the tubes, they may be installed incorrectly.
Center tube clamps over the seams where two radiant tube sections connect. If necessary, rotate tube
clamps so they will not interfere with the reflector end caps during expansion and contraction of the
heater while operating.
Tighten tube clamp bolts to secure. When proper compression is obtained (30-44 Nm), the 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.
Figure 3.10
•
Tube Connections
Optional U-Bend or Elbow Accessory Configurations
A 180 degree U-bend or 90 degree accessory fitting may be installed in the radiant tube heater system.
Refer to
page 17 for minimum distance requirements from the burner control box.
When installing a U-bend or Elbow Accessory Fitting:
•
The top clearance of an uncovered (no reflector) U-bend or elbow accessory fitting to combustibles is
458mm.
•
If operating the heater un-vented, separate the intake air to the heater from its exhaust products a
minimum of 1220mm; further separation may be necessary (see figure 3.12). Outside combustion air
may also be supplied.
•
A maximum of one 180° U-bend or two 90° elbows can be installed on a heater.
•
Omit one 840mm section of turbulator baffle. Refer to Baffle Assembly on pages 21 & 22.
16
3
4
5
6
