
DRI-STEEM Vapor-logic3 to Vapor-logic4 Adaptor Board Installation Manual • Page 1
Table of contents
Warnings and cautions ................................ ii
Before beginning the upgrade........................... 2
Parts
............................................... 2
GTS humidifiers:
Board removal and replacement
Removing Vapor-logic3, installing Vapor-logic4. . . . . . . . . . . . . 3
Transferring expansion board terminal blocks ..............5
Keypad/display removal and replacement
Indoor GTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
GTS with outdoor enclosure ..............................6
Safety circuit wiring
Leave safety circuit wired in series with one alarm ........... 8
Separate safety circuit alarm signals into three alarms ........ 8
Electric humidifiers:
Board removal and replacement
Removing Vapor-logic3, installing Vapor-logic4. . . . . . . . . . . . 10
Transferring expansion board terminal blocks .............12
Keypad/display removal and replacement
Vaporstream and CRUV with mounted keypad/display .....13
Vaporstream and CRUV with unmounted keypad/display ...13
Vapormist and Humidi-tech .............................13
Safety circuit wiring .......................................14
STS humidifiers:
Board removal and replacement ............................16
Keypad/display removal and replacement
STS with mounted keypad/display ........................18
STS with unmounted keypad/display .....................18
Safety circuit wiring .......................................18
All Humidifiers:
Start-up and validation
Start-up ...............................................19
Test outputs ...........................................19
Test run ............................................... 19
Vapor-logic4 adaptor board pin descriptions ........ Back cover
Tools required:
• Needle nose pliers / wire cutter
• Wire stripper
• #2 Phillips screwdriver
• 3/16" and 1/8" flat-tip screwdrivers
• 5/8" nut driver
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