Section 11: Gas Piping - Roberts Gorden CoRayVac CRV-B-2 Installation, Operation & Service Manual

SECTION 11: GAS PIPING

WARNING
Explosion Hazard
Leak test all components of gas piping
before operation.
Gas can leak if piping is not installed
properly.
Do not high pressure test gas piping with
heater connected.
Failure to follow these instructions can result
in death, injury or property damage.
Install the gas hose as shown on Page 48, Figure 28.
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 28.
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" wc. 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.
• 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.
SECTION 11: G P
AS IPING
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