
DRI-STEEM Vapor-logic
3
*OTUBMMBUJPOBOE0QFSBUJPO.BOVBMt1BHF
Main control board connections
Figure 11-1:
Vapor-logic
3 main control board
Testing input configuration:
Measure 1-5 VDC across
terminals 22-23 for
4-20 mA signal by
others or 4-20 mA
transmitter. Measure
21 VDC for on-off
control when open
and 0 VDC for on-off
control when closed.
For VAV/duct RH or
temp comp inputs
measurements are the
same.
VL3-OM-010
VL3_IOM.pdf 15 11/19/2009 9:11:06 AM
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