Round Flat Disc
REV. 1-7-19 Page 9
INSTALLING BURNER ORIFICE (OAS)
GAS FL
OW
Burner Pan
OAS#
U3-8D-S
Lock Nut
Locate the burner nipple underneath the
burner pan. Ensure the nipple from on
the spur burner has gas rated Teflon tape
wrapped around the threads. Thread the
OAS (orifice air shutter) on to the nipple
of the burning spur clockwise manner.
Secure into position. See Fig. 8.
Fig. 8
Installing OAS assembly to spur burner.
INSTALLING KEY VALVE
The key valve contents: 1- key valve, 1-
key and 1- flange. (See Fig. 9). The valve
requires a 1¼” round clearance hole in the
non-combustible enclosure wall. See the
instructions supplied with the key valve for
more specific details.
Note:
Be sure to leak
test all fitting before operation. Fig. 10 shows
an example of a typical installation.
Primary Gas
Supply
ON
O
FF
Fig. 9
Key valve components.
Flat disc’s are typically used with landscape blocks. The illustrations below show examples of possible installations.
Fig’s 4, 5, and 6 show the use of the flex frame system which provides the ability to easily remove the disc if necessary.
ON
O
FF
ON
O
FF
Fig.4
Show disc secured under stone caps.
Fig. 5
Show disc secured between layer of block.
ON
OFF
Fig. 6
Show blocks supporting center of disc.
ON
O
FF
Fig. 7
Show blocks supporting an oversized opening.
