PN 9000-133-VE, Rev U
Remote Calibration Unit Connections (Optional)
This section discusses the electrical connections for the optional Remote
Calibration Unit (RCU):
If you don’t have the RCU option, skip this section.
Oxygen-Only Remote Calibration Unit Connections
Oxygen-Only Remote Calibration Unit (RCU) connections on the WDG-V
Wiring
board, and their RCU connections, are (see Figure 2-16):
ZERO GAS
WDG-V
Terminal Z
to
Pin 13
on RCU
ASPIRATOR
WDG-V
Terminal A
to
Pin 14
on RCU
O2 SPAN
WDG-V
Terminal S1
to
Pin 15
on RCU
VALVE COMMON WDG-V
Terminal V
to
Pin 16
on RCU
Combustibles Remote Calibration Unit Connections
If you have the combustibles option (and a combustibles RCU), you must also
make the following connection (see Figure 2-16):
COMBUSTIBLE SPAN – WDG-V
Terminal S2
to
Pin 17
on RCU
For a WDG-VCM with hot-wire detector, Remote Calibration Unit connects:
METHANE SPAN – WDG-V
Terminal S3
to
Pin 18
on RCU
Digital Input to Initiate Remote Calibration Unit
The digital input connections on the
Wiring
board allow you to initiate a
calibration from a remote location. For this option to work, you must have a
remote calibration unit. The system monitors the digital input, and when the
switch closes, it sends the system into an automatic calibration. The switch you
connect to this digital input must be a normally open switch.
Installation and Start-Up
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2-33
Summary of Contents for WDG-V
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