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BLAST TUBE
Fig. 5. Location of C7013/C7014 in a conventional
pressure atomizing oil burner.
1. Remove C7013/C7014.
2. Attach bracket 32007439-001 (included with
C7962B1010) onto C7962 detector using screws and
nuts provided.
3. Attach the assembled detector and bracket onto the oil
pipe going to the nozzle with the remaining screw and
nut.
4. Adjust the assembly into a location to provide adequate
clearance and for a clear view of the flame. Tighten the
screw to secure into place. See Fig. 6.
BLAST TUBE
C7962
Fig. 6. Mounting a C7962 in a conventional pressure
atomizing oil burner.
WIRING
CAUTION
Equipment Damage Hazard.
Can cause improper operation.
The blue leadwire must be connected to the F terminal
of the flame safeguard control subbase or terminal strip
and the white leadwire to the G terminal. Failure to
observe the circuit polarity by reversing the leadwires
(even momentarily) may cause the flame detector to
improperly supervise the combustion flame.
IMPORTANT
All wiring must comply with applicable local electrical
codes, ordinances and regulations. Use NEC Class 1
(line voltage) wiring.
"F" TERMINAL
C7013/C7014 PHOTOCELL
HOUSING AND HOLDER
M29283
32007439 BRACKET
M29284
C7962B VISIBLE LIGHT FLAME DETECTOR
The detector has color-coded and labeled, plastic-insulated,
no. 18 AWG leadwires, eight ft. (2.44 m) long, rated for 221°F
(105°C).
1. Keep the flame signal leadwires as short as possible
from the flame detector to the terminal strip or wiring
subbase. Capacitance increases with wire length, reduc-
ing the signal strength.
NOTE: The maximum permissible leadwire length depends
on the type of leadwire and the conduit type and
diameter. The ultimate limiting factor is flame signal
leadwire length is the signal current or voltage at the
flame safeguard device.
2. If needed, splice detector leadwires for longer leadwire
runs, observing the following considerations:
a. Make required splices in a junction box.
b. Use moisture-resistant no. 14 wire suitable for at
least 167°F (75°C).
c. For high temperature installation, use Honeywell
Specification no. 32004766-003 or equivalent for the
F leadwire. This wire is rated up to 400°F (250°C) for
continuous duty. It is tested for operation up to 20 kV
and for breakdown up to 35 kV. For the other
leadwires, use moisture-resistant no. 14 wire
selected for a temperature rating above the
maximum operating temperature.
d. F and G wires must be run in their own conduit
independent of other power carrying leadwires. More
than one scanner F and G wire can be run in the
same conduit.
e. A shielded twisted pair wire may be substituted for
using conduit for routing the F leadwire. Be advised
of the capacitance per foot of shielded wire
effectively reduces the flame signal at the flame
safeguard device. Be sure to ground the shield to the
G terminal at the flame safeguard wiring subbase.
f.
The detector wires need to be run in their own
conduit as well, avoiding other electrical noise
carrying wiring.
g. The scanner wires should remain separated a
minimum of two in. (51 mm) from other line voltage
wires in the main control panel to the flame
safeguard device.
3. Avoid installation considerations that can influence
detector operation and maximum leadwire length, such
as:
a. Moisture.
b. Ignition interference.
c. High resistance connections—poor grounds.
d. Leadwire capacitance.
e. Voltage fluctuations.
f.
Induced line transients.
g. Floating grounds—grounds at some voltage above
earth ground.
h. No G. wire—burner used as ground.
i.
Detector output less than maximum attainable for the
installation (inadequate sighting).
IMPORTANT
Do not run the flame detector wiring in the same
conduit with high voltage ignition transformer wires.
5
65-0277—03
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