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Swivel Mount
To facilitate proper sighting of the flame, a swivel mount
(part no. 118367A) is available. The swivel mount will require a
3/4 to 1/2 in. reducer and a 1/2 in. close nipple to mount a
C7027A or C7927, or a 1 in. pipe at least 2-1/2 in. (63.5 mm)
long to mount a C7035A. For mounting details, refer to form
60-0361 for the 118367A Swivel Mount.
Mount The Detector (Fig. 6)
Mount the detector onto the sight pipe, pipe tee, nipple, or
other fitting. Make sure the flange gasket is in place inside the
mounting collar on the detector, and then screw the collar onto
the sight pipe or fitting.
NOTE: If a window is installed between the UV detector and
the flame, it must be fabricated from quartz or fused
silica. Ordinary glass filters out ultraviolet radiation.
Using a Heat Block With a C7027 or C7927
(Fig. 7)
If the temperature of the sight pipe will become high enough to
cause the C7027A or C7927 to overheat (above 215°F (102°C)
up to 266°F (130°C), screw a 136733 Heat Block (order
separately) onto the sight pipe before mounting the detector.
C7027A OR C7927 DETECTOR
Mounting a C7044A On a Blast Tube (Fig. 8)
The C7044 is designed to be mounted on the blast tube of a
burner. The exact location should be determined by the burner
manufacturer. Contact the manufacturer before making any
modifications to the installation.
HIGH TEMPERATURES (ABOVE 215 F [102 C])
DO NOT USE FOR TEMPERATURES ABOVE 266 F [130C]
Fig. 7. Mounting dimensions of 136733 Heat Block in inches (mm).
MINIPEEPER
ADD PIPE TEE,
PERFORATED
NIPPLE, OR OTHER
SUITABLE DEVICE
FOR VENTILATION,
IF REQUIRED.
Fig. 6. Mounting a C7027A or C7927A on a
combustion chamber (viewed from above).
C7035A mounting is similar.
136733 HEAT BLOCK
5
1
[41]
8
5
[16]
8
9
[14]
16
1
1
1
16
[32]
[27]
1/2-14 NPSM
1/2-14 NPSM
INTERNAL
EXTERNAL
THREADS
THREADS
WARNING
Explosion Hazard.
Can cause serious injury or property damage.
The C7044 will allow air leakage through its housing.
Do not locate the C7044 in an atmosphere of fuel
vapors under positive pressure. The C7027, C7035 or
C7927 should be used if internal pressure seal-off is
required.
7
®
ULTRAVIOLET FLAME DETECTORS
C7027A, C7927 (OR C7035A)
FLANGE
GASKET
BLACK IRON
SIGHT PIPE
1/2-INCH SIGHT PIPE
1
4
1/2-14 NPSM
INTERNAL
THREADS
M32659A
COMBUSTION
CHAMBER
WALL
M24735A
60-2026-16
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