Wiring - Honeywell C7061 A Product Handbook

WIRING

CAUTION
When using a C7061A/F with an R7061 or R7861
Dynamic Self-Check amplifier, be careful not to
short the white shutter lead wires together (by
wiring incorrectly, leaving an incorrect jumper
wire, or stripping the insulation too much so the
bare lead wires can touch).
If the shutter leadwires are shorted during the
operation, the amplifier can be permanently
damaged and nonoperative.
1. All wiring must comply with applicable local
electrical codes, ordinances, and regulations.
Use NEC class 1 wiring.
2. Keep the flame signal lead wires as short as
possible from the flame detector to the termi-
nal strip or wiring sub base. Capacitance
increases with lead wire length, reducing the
signal strength. The maximum permissible lead
wire length depends on the type of lead wire
and conduit type and diameter. The ultimate
limiting factor in flame signal lead wire length
is the signal current.
3. The C7061A1004 detector has color-coded
plastic-insulated, no. 18 lead wires, 8 ft (2.4m)
long, rated for 105°C (221°F). These wires must
be run in a conduit.
4. If the lead wires are not long enough to reach
the terminal strip or wiring sub base, make the
required splices in a junction box.
5. If splicing is necessary, use moisture-resistant
no. 14 wire suitable for at least 75°C (167°F) if
the detector is used with a flame safeguard
primary control, or at least 90°C (194°F ) if used
with a flame safeguard programming control.
6. For high temperature installations, use Honey-
well specification no. R1298020 wire or
equivalent for the F lead wire. This wire is rated
up to 204°C (400°F) for continuous duty. It is
tested for operation up to 600 volts and for
breakdown up to 7500 volts. For the other lead
wires, use moisture-resistant no. 14 wire
selected for a temperature rating above the
maximum operating temperature.
7. Refer to Fig. 10. for wiring connections
IMPORTANT
Do not run the flame detector wiring in the same
conduit with high voltage ignition transformer
wires.
Connecting Detectors in Parallel
For a flame that is difficult to sight, using two parallel C7061
flame detectors reduces nuisance shutdowns. If only one of
the parallel detectors loses the flame signal, the other
indicates the presence of the flame and keeps the burner
running. If two parallel C7061A setectors are used, a flame-
simulating failure in either detector causes the burner to shut
down. Two C7061A setectors can be connected in parallel
to the same terminals on 120 volt flame safeguard controls.
EN1C-0015SZ20 R0602
CAUTION
When using the C7061 in conjunction with an
R4348 flame relay at 230VAC, parallel sensores
can not be used.
To avoid exceeding the rating of the solid-state shutter switch
in the R7861 flame signal amplifier, do not connect more
than two C7061A detectors in parallel.
IMPORTANT
Voltage and frequency rating of the C7061A must
match the power supply of the flame safeguard
control.
Fig. 10_1. Wiring diagram for C7061A1004 detectors with
7800 SERIES Flame Safeguard controls with
shutter drive circuitry.
Fig. 10_2. Wiring diagram for C7061A1004 detector with
R4348 Flame Safeguard controls with shutter drive
circuitry.
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