Roberts Gorden Low Intensity Unitary Heater Designed for Harsh Environments HE-40 - Manual (Page 32)

HE-S ERIES I NSTALLATION , O PERATION AND S ERVICE M ANUAL
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SECTION 7: OPTIONAL HEATER ACCESSORIES
7.1 U-Tube Configuration
Heaters (except HE-40) 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 8, Figure 7
through Figure 9. When using a U-Tube
configuration, the following additional rules must be
adhered to:
• A minimum of 10' (3 m) on HE-60/80 and a
minimum of 15' (4.5 m) on HE-100/125/150/175 is
required between the burner and the U-Tube.
• The correct turbulator ( See Page 22, Figure 6.5)
must be installed in the last standard section of
tube.
• The burner must never be operated in a tilted
position.
• The heater must be properly supported at all
locations. See Page 28, Figure 19.
WARNING
Cut/Pinch Hazard
Wear protective gear during installation,
operation and service.
Edges are sharp.
Failure to follow these instructions can result
in injury.