Installation | 3-21
• For AC mains supply wiring, use between 12 and 14 American Wire
Gauge (AWG) or equivalent metric between 3.3 mm
2
and 2.1 mm
2
. For
all signal wiring, use 18 to 22 AWG (0.82 mm
2
to 0.33 mm
2
). For sensor
connections, Figure 3-17 shows the recommended sensor cable types
for various WDG-style sensors.
• Use the conduit entry point closest to the connections you are making.
Do not add any additional conduit entry holes!
• You may use 1” conduit with a 3/4” adapter at the entry to the Series
2000 controller for signal and sensor wiring.
WDG SENSOR TYPE NUMBER OF TWISTED
PAIRS NEEDED
GAUGE OF WIRE
WDG-IV
(O2 ONLY) 4
22 AWG (to 250 ft)
18 AWG (to 1000 ft)
WDG-IVC
(COMBUSTIBLES)
6 (to 40 ft)
8 (40 to 10000 ft - must
use remote sense)
18 AWG
WDG-IVCM
(COMBUSTIBLES/METHANE)
8 (to 40 ft)
12 (40 to 10000 ft - must
use remote sense)
18 AWG
Figure 3-17. Required sensor cable wiring (minimum acceptable grades).
Control Unit Mains Supply Connections
Do not run control unit AC mains supply wiring in the same conduit
with other AC line power wires. By keeping this wiring separated,
you prevent transient signals from reaching the control unit.
The Series 2000 control unit can operate using between 85 to 250 volts AC,
47 to 63 Hz. There is no power switch or circuit breaker on the control
unit, and it must be protected by installing it on a circuit-protected line,
maximum 15 amperes, with a switch or circuit breaker in close proximity
to the control unit and within easy reach of an operator. Mark the switch
or circuit breaker as the control unit disconnecting device.
Mains supply connections to the control unit are as follows:
Line - Line connection
Neutral - Neutral connection (USA)
Chassis Stud - Equipment ground (protective conductor)
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