Installation guide
DRI-STEEM Vapor-logic
3
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Start-up checklist (continued)
Start-up checklist, continued
☐ Confirm that the high limit humidistat input is closed or that the
variable air volume (VAV) control system high limit transmitter
is connected.
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If the tank does not contain water and the heat outputs are
activated, or the burners are fired by the Vapor-logic
3
control
system, a serious failure will result. If this happens, immediately
remove power from the system and verify that all wiring is done
per the wiring instructions in this manual and the unit wiring
diagram.
☐
With sufficient water in the tank, the airflow switch closed, the
high limit humidistat closed, the safety interlock circuit closed,
and a call for humidity, verify that the heat outputs are activated.
☐
Check amp draw of heaters for electric units; refer to wiring
diagram for proper rating. If unit is powered by steam, check for
steam flow. For gas fired units, verify gas flow and combustion.
☐
During normal operation, the humidifier operating status
appears in the keypad/display. See Pages 57 and 58 for
descriptions of keypad/display status items.
☐
If you experience difficulties, have the above keypad/display
information available with the model and serial numbers of the
humidifier and the Vapor-logic
3
configuration string and call
DRI-STEEM for assistance.
VL3_IOM.pdf 87 11/19/2009 9:11:16 AM