Roberts Gorden DF, Installation, Operation & Service Manual

Page: 35 / 74

SECTION 7: O
PTIONAL
H
EATER
A
CCESSORIES
31
SECTION 7: OPTIONAL HEATER ACCESSORIES
7.1 U-Tube Configuration
Heaters are approved for optional
U-tube configurations.
The U-tube may be installed in either a standard
horizontal position, a 45° position or in an opposite
45° position as shown
on Page 7, Figure 7 through
Page 8, Figure 9 . When using a U-tube configuration,
the following additional rules must be adhered to:
• A minimum of 10' (3 m) on DF-80 and a minimum
of 15' (4.5 m) on DF-100/125/150/175/200 is
required between the burner and the U-tube.
• The correct turbulator/swirler ( See Page 23, Step
6.4 ) must be installed in the last standard section
of the tube.
• The burner must never be operated in a tilted
position.
• The heater must be properly supported at all
locations. See Page 33, Figure 25 .
WARNING
Cut/Pinch Hazard
Wear protective gear during installation,
operation and service.
Edges are sharp.
Failure to follow these instructions can result
in injury.