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

CORAYVAC ® I , O
NSTALLATION PERATION AND
! ! ! ! ! SECTION 11: GAS PIPING
Figure 23
Install the flex gas connector as shown in Figure 23.
The flex gas connector 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.
FIGURE 23 – Gas Connection with Stainless Steel Flex Gas Connector
Shut-Off Valve must be parallel to burner gas inlet. The 2" (5 cm)
displacement shown is for the cold condition. This displacement
may reduce when the system is fired.
40
S M
ERVICE ANUAL
There is an expansion of the heat exchanger 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 strictly in accordance with Figure 23 below.
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.
• 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.
Description
1/2" Flex Gas Line
3/4" Flex Gas Line
Part Number
91412200
91412203
Hold gas nipple securely
with pipe wrench when
attaching the flex gas
connector.
Failure to follow these
instructions can result in
product damage.