Roberts Gorden CTHN-125 Manuel D’Utilisation

17

CTHN-Series heaters (except CTHN-40) are 
approved for optional u-tube configurations. 

The u-tube may be installed in either a standard 
horizontal position, 45° position or in an opposite 45° 
position as shown on Page 5, Figure 5 through 
Figure 7. When using a u-tube configuration, the 
following additional rules must be adhered to:

• A minimum of 10' (3 m) on CTHN-60/80, a 

minimum of 15' (4.5 m) on CTHN-100/125, and a 
minimum of 20' (6 m) on CTHN-150/175/200 is 
required between the burner and the u-tube.

• For turbulator installation, See Page 21, Step 8.8.
• The burner must never be operated 

in a tilted position.

The heater must be properly supported at all 
locations. See Page 10, Figure 12.

U-tube

18" (457 mm)

Center to Center

U-clips

Reflector

End Caps

1

2

1

2

1

2

1

2

Burner

Reflector

Turbulator

(With Select

Models)

Tube Clamp

Package

Burner

Tube

Tube

U-tube

Support Bracket

Reflector

Support

Couplings

Nut

Lock Washer

Lock Washer

Nut

U-bolt

4" (10 cm) u-bolt,

secured to burner tube

with 1/4" (6 mm)

lockwashers and

1/4-20 hex nuts.

4" (10 cm) u-bolt,

secured to bracket with

1/4" (6 mm) lockwashers

and 1/4-20 hex nuts on

top and bottom to

allow for tube expansion

and contraction.