CleaverBrooks CFC-500 Operation, Service And Parts Manual page 136

CB FALCON
Application Recommended Wire Size
Modulating 22 AWG two-wire twisted
Output Signal pair, insulated for low voltage
Modbus 22 AWG two-wire twisted
communication pair, insulated for low voltage
Temperature 22 AWG two-wire twisted
(operating) pair, insulated for low voltage
Sensors
Temperature 22 AWG two-wire twisted pair
(Limit) Sensors with ground.
Flame Sensor 14, 16, 18 AWG Copper
(Flame Rod/UV) conductor, 600 volt
insulations, moisture-
resistance wire
Ignition Ignition Cable rated for 25kV
at 482F(250C)
Grounding Earth ground
Grounding Signal ground
750-265
Table 2. Wire Sizes. (Continued)
Recommended Part Number(s)
Beldon 8443 or equivalent
22 AWG two-wire twisted pair, insulated for low voltage
Beldon 8443 or equivalent
Beldon 8723 shielded cable or equivalent
TTW60C, THW75C, THHN90C
32004766-001 (2') or -003 (per foot)
1. Earth ground must be capable of conducting enough cur-
rent to blow the 20A fuse (or breaker) in the event of an
internal short circuit.
2. Use wide straps or brackets to provide minimum length,
maximum surface area ground conductors. If a leadwire
must be used, use 14 AWG copper wire.
3. Make sure that mechanically tightened joints along the
ground path are free of nonconductive coatings and pro-
tected against corrosion on mating surfaces.
Use the shield of the signal wire to ground the device to the
signal ground terminals [3(c)] of each device. Connect the
shield at both ends of the chain to earth ground.
12
Maximum
Leadwire
Distance (in
feet)
50
50
50
30
3