Install Instructions

WIRING
STEP THREE: Make Add-On Air Proving Decision
In addition to monitoring system power and fan regulation, TrueSTEAM can monitor physical air movement
through an optional add-on air proving device. If an air proving device is added, TrueSTEAM can create steam
only if the fan is moving air through the supply duct.
Honeywell HIGHLY recommends adding an Add-On Air Proving Device for ALL
TrueSTEAM™ installations.
IMPORTANT NOTE: The image below is not a complete wiring diagram. It only depicts power monitoring and
is not meant to be a stand alone diagram. Please refer to the “Wiring the TrueSTEAM” section in the following
pages for complete wiring diagrams.
WIRING BASICS
• Wire TrueSTEAM R and C to HVAC system
R and C with an air proving device in-line
on C.
• Congure air proving through DIP 5 on
TrueSTEAM. Set DIP 5 up and keep
DIP 4 down.
• TrueSTEAM will look for physical air
movement through its C connection before
steam enters the duct.
65432
On
Off
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HVAC System
TrueSTEAM
R
C
R
C
M29619
TrueSTEAM Humidication System 69-2285—05
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