TF-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL

9.4 Vertical Venting

For 4" (10 cm), an approved vent cap (P/N 90502300) must be used.

For 6" (15 cm) common vent, an approved vent cap (P/N 90502302) must be used.

A vent shall not extend less than 2' (0.6m) above the highest point where it passes through a flat roof of a building.

9.5 Unvented Operation Tube Termination

Turndown type vent terminal with a screen must be installed at the exhaust end of the tube. Vent terminal design shall not incorporate backdraft flap.

FIGURE 22: Tube Termination

9.6 Length Requirements

The maximum vent length, where both tubes are

vented together is 45’ (13.7 m) of 6" (15 cm) diameter duct. The maximum vent length, where both tubes are vented individually is 45’ (13.7 m) of 4" (11 cm) diameter duct, or 22.5’ (7 m) on each tube.

The maximum outside air supply duct length allowed is 45’ (13.7 m) of either 4" (10 cm) or 5" (13 cm) diameter, however the maximum length depends on the venting arrangement used.

The total vent length, plus outside air duct length, plus any extensions to minimum heat exchanger lengths, cannot exceed 65' (19.8 m).

Vent length should be limited to less than 20' (6 m). If using vent lengths greater than 20' (6 m), condensation will form in the vent pipe. Insulation and additional sealing measures (high temperature silicone at all seams) are required. Optional heat exchanger lengths are considered as vent length for length determination.

Subtract 15' (4.6 m) of maximum allowed vent or duct length per vent elbow if more than two are used.

9.7 Horizontal Ventilation 4" (10 cm) Pipe

SIDE VIEW

 

Combustible or

 

 

 

Non-Combustible

 

 

Burner

Wall

 

 

Flexible

Vent Terminal

 

 

 

 

Boot

 

 

Tube

 

Approved

 

Single Wall

Wall

 

 

 

Install with boot

Vent Pipe

Thimble

 

 

 

 

extended

 

 

Description

Part Number

Flexible Boot

91412800

 

 

Boot Clamp

91901300

 

 

Vent Terminal (Comb. Wall)

90502100

 

 

Vent Terminal

02537801-1P

 

 

Vent Sleeve

09080000

 

 

4" (10 cm) Single Wall Pipe

Metalbestos

Cap

 

Non-Combustible

18" (46 cm)

Min.

Wall

 

4" (10 cm) Single Wall Pipe

Vent Terminal

 

38

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Image 44
Roberts Gorden TF-120, TF-350 Vertical Venting, Unvented Operation Tube Termination, Horizontal Ventilation 4 10 cm Pipe

TF-380, TF-250, TF-160, TF-200, TF-120 specifications

Roberts Gorden is renowned for its innovative and efficient heating solutions, particularly through its TF series of forced air heaters. The TF-120, TF-200, TF-250, TF-300, and TF-350 models are designed to cater to a variety of applications, offering flexibility, efficiency, and user-friendly operation.

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