SECTION 11: GAS PIPING

SECTION 11: GAS PIPING

WARNING

FireFireHazardHazard

TightenTightengasgashosehosefittingsfittingstotoconnectconnectgasgassupplysupply accordingaccordingtotoFigureFigure2524. .

Gas hose can crack when twisted.

Gas hose can crack when twisted.

Gas hose moves during normal operation.

Gas hose moves during normal operation.

Failure to follow these instructions can result in death,

injury or property damage.

Failure to follow these instructions can result in death, injury or property damage.

Install the gas hose as shown in Figure 25. The gas hose accommodates expansion of the heating system and allows for easy installation and service of the burner. Before connecting the burners to the supply system, verify that all high pressure testing of the gas piping has been completed.

There is an expansion of the tube with each firing cycle. This will cause the burner to move with respect to the gas hose. This can cause a gas leak resulting in an unsafe condition if the gas connection is not made in strict accordance with Figure 25.

Meter and service must be large enough to handle all the burners being installed plus any other connected load. The gas hose which feeds the system must be large enough to supply the required gas with a maximum pressure drop of 1/2" w.c. When gas piping is not included in the layout drawing, the local gas supplier will usually help in planning the gas piping.

Do not high pressure test the gas piping with the burner connected. Failure to follow these instructions can result in property damage.

Check the pipe and tubing ends for leaks before placing heating equipment into service. When checking for gas leaks, use a soap and water solution; never use an open flame.

FIGURE 25: Gas Connection with Flexible Gas Hose

Hold gas nipple securely with pipe wrench when attaching the gas hose. Failure to follow these instructions can result in product damage.

 

Shut-Off Valve must be

 

 

3/4" NPT Pipe

parallel to burner gas

 

 

inlet. The 2" (50 mm)

 

 

Shut-Off Valve

 

 

displacement shown is for

 

(Included

 

the cold condition. This

 

 

With Gas Hose)

 

 

displacement may reduce

 

 

 

12" 2" (5 cm) when the system is fired.

45°

(30 cm)

 

 

 

Flexible

 

 

 

Gas

 

 

 

Hose

Burner

Horizontal

Rear View

 

 

 

Description

Part Number

1/2" Flexible Stainless Steel Gas Hose (US Models)

91412200

 

 

3/4" Flexible Stainless Steel Gas Hose (US Models)

91412203

 

 

1/2" Rubber (Type 1) Gas Hose (Canadian Models)

91412206

 

 

3/4" Rubber (Type 1) Gas Hose (Canadian Models)

91412207

 

 

41

Page 47
Image 47
Roberts Gorden CRV-B-4, CRV-B-8, CRV-B-9, CRV-B-12A, CRV-B-6, CRV-B-10 GAS Piping, Gas Connection with Flexible Gas Hose

CRV-B-4, CRV-B-12, CRV-B-2, CRV-B-10, CRV-B-6 specifications

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