C7007A, C7008A, C7009A FLAME ROD HOLDER & FLAME ROD ASSEMBLIES
3
60-2024—06
INSTALLATION
WARNING
Read these instructions carefully. Failure to follow
them could damage the product or cause a
hazardous condition.
1.
Check the ratings given in the instructions and on the
product to make sure the product is suitable for your
application.
2.
Installer must be a trained, experienced flame safe-
guard technician.
3.
After installation is complete, check out product opera-
tion as provided in these instructions.
MOUNTING
If the manufacturer of the burner has not provided a place for
mounting the flame rod holder, the installer should select a
suitable place on the burner faceplate or a place at the front of
the boiler. See Figs. 6, 7, 8, and 9 for typical mountings on
various burners. When selecting a location:
1.
Locate the unit so that the flame rod will only prove a
pilot flame that will safely and quickly light the main
flame.
2.
Locate the unit so that it will be clear of the fire door
opening radius.
3.
Locate the unit so that drafts will not blow the pilot flame
away from the flame rod.
4.
t is preferable to locate the unit so that the flame rod will
be vertical or at least angled downward. A rod so
installed is less likely to sag at high temperatures.
NOTE: For extra electrode support, couple a length of 1/8
inch iron pipe to the extension assembly, which is
already threaded (internal 1/8-27 NPT, C7007A
only).
5.
The unit may also be installed so the flame rod is hori-
zontal or angled upward, but extra support is needed for
rods over 12 inches [305 mm] long.
6.
If the flame rod will be used to supervise a gas pilot for
an oil burner installation, the rod must be located far
enough from the oil flame to prevent oil spray from
impinging and burning on the surface of the rod.
7.
A horizontal or inclined flame rod should enter the pilot
flame from the side. If the rod is located above and par-
allel to a horizontal or semi-horizontal pilot burner, it
may falsely indicate that a weak or candling pilot flame
is adequate for igniting the main burner. See Fig. 5.
CAUTION
Wrong position will provide inadequate pilot
flame.
Fig. 5. Positions of flame rod with horizontal type pilot
burner.
Fig. 6. Suggested installation of flame rod used to prove
both main and pilot burners.
Fig. 7. Suggested installation on tunnel burner.
WRONG POSITION OF ROD
PILOT BURNER
M818
ROD
BURNER
C7008A
FLAME ROD
ASSEMBLY
PILOT
M1838
TOP
VIEW
C7007A
HOLDER
WITH FLAME
ROD
PILOT
BURNER
M1837
TOP
VIEW
