Operating instructions

25
Start-up checklist (cont.).
Operation
Operation:
Start-up checklist
 Confirm that all wiring is correct per the wiring
diagram.
 Confirm that proper grounding and an approved
earth ground are provided.
 Confirm that the J17, J18 and J19 shunt
connectors on the VAPOR-LOGIC
®
3
board are
in their correct position per the wiring diagram.
See Page 3 for the physical locations.
 Confirm that the keypad/display is mounted on
the outside of the control cabinet with modular
cable routed away from high voltage circuits
and connected to the J2 female connector on the
control board.
 Turn water supply on and confirm that the drain
valve (if available) is closed.
 Turn power on and confirm that the display
shows the “Main Menu” screen with an
operational clock.
 Enter the “Control Modes” screen and make
sure the system is in auto mode.
 When the keypad/display shows “Filling” as
part of the idle screen information, confirm that
the tank is filling with water.
 Confirm that the airflow switch is closed.
 Confirm that the high limit humidistat input is
closed or that the variable air volume (VAV)
control system high limit transmitter is
connected.
 With sufficient water in the tank, the air flow
switch closed, the high limit humidistat closed,
the safety interlock circuit closed, and a call for
humidity, verify that the heat outputs are
activated.
IMPORTANT: Confirm that the tank has
sufficient water. 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.
 During normal operation, the keypad/display
will show humidifier operating status. See Pages
27 through 36 for descriptions of keypad/
display menu items. To change any of the
operating parameters, please refer to the above
pages.
 If you experience difficulties, have the above
information available with the model and serial
numbers of the humidifier and the
VAPOR-LOGIC
3
program code and call
DRI-STEEM for help.