Roberts Gorden TF-200 Benutzerhandbuch

44 

Install the gas hose as shown 

on Page 45, Figure 23. 

The gas hose accommodates expansion of the 
heating system and allows for easy installation and 
service of the burner. A 90° pipe elbow (not supplied) 
must be installed into the gas valve to ensure proper 
orientation of the flex gas connector. 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 line. This can cause a gas leak resulting in 
an unsafe condition if the gas connection is not made  
in strict accordance with 

Figure 23 on Page 45.

Meter and service must be large enough to handle all 
the burners being installed plus any other connected 
load. The gas line 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.

Gas lines must meet applicable codes: 
United States: The Flexible Stainless Steel Gas 
Hose (US models) supplied with the heater is certi-
fied per the Standard for Connectors for Gas Appli-
ances, ANSI Z21.24/CSA 6.10 - latest revision. 
Canada: The Rubber Type 1 Gas Hose (Canadian 
models) optional with the heater is certified as being 
in compliance with the Standard for Elastomeric 
Composite Hose and Hose Couplings for Conducting 
Propane and Natural Gas, CAN/CGA 8.1 - Latest 
revision.