Page 16 • DRI-STEEM Vapor-logic3 to Vapor-logic4 Adaptor Board Installation Manual
1. Access Vapor-logic3 board by loosening screws on the two door
latches removing control cabinet door.
2. Disconnect Vapor-logic3 keypad/display cable from Vapor-logic3
main board.
3. Torque all terminal block screws to 2.5 in-lb (0.28 N·m) to prevent
wires from pulling loose in Step 5.
4. Mark location of Vapor-logic3 main board on subpanel by making
corner marks on subpanel with felt-tipped marker.
5. Use pliers to pull terminal blocks from Vapor-logic3 main board.
Unscrew stand-offs, and remove board and stand-offs (they will not
be re-used).
6. Leaving adhesive backing paper on the six nylon stand-offs
packaged with Vapor-logic4 adaptor board, push stand-offs into
adaptor board mounting holes, as shown in Figure 16-1.
7. Plug Vapor-logic4 keypad/display cable into Display connection
on Vapor-logic4 adaptor board (see Figure 17-1). If present,
plug laptop or network cable into Ethernet connection on adaptor
board.
8. If upgrading to Vapor-logic4 without LonTalk® interoperability
(see Figure 16-2), skip this Step. If upgrading to Vapor-logic4
with LonTalk interoperability, disconnect wires from Vapor-logic3
LonTalk pins and land them as instructed in Table 16-1.
9. Make sure subpanel surface is clean and dry. Remove adhesive
backing paper from new stand-offs, and press adaptor board into
exact location where Vapor-logic3 board was mounted.
10. Land loose Vapor-logic3 terminal blocks on corresponding pin
locations of Vapor-logic4 adaptor board.
Notes: Some 4-pin terminal blocks are two interlocked 2-pin
blocks that will need to be split. See Figure 16-3.
Scrape away any pin hole or screw corrosion before landing
terminal blocks on Vapor-logic4 adapter board.
Not all Vapor-logic3 wire connections will be used for this
upgrade. Cap bare ends of unused wires with wire nuts,
and tuck them into wire channel.
WARNING
Shut down humidifier
Before performing any maintenance or
service procedures, shut off all electrical
power to humidifier using field-installed
fused disconnect, lock all power
disconnect switches in OFF position.
STS humidifiers:
Board removal and replacement
Figure 16-1:
VL4 adaptor board stand-offs
Bottom of VL4 adaptor board shown
Stand-off
Table 16-1
Landing LonTalk wires
Disconnect wire from this
Vapor-logic3 board LonTalk pin
Connect it to this pin on Vapor-logic4
adaptor board LON ProtoCessor Module
Ground Ground pin P1-2, P2-4, P4-3, P6-3, or P19-3
A P21A
B P21B
Figure 16-2:
Determining LonTalk interoperability
Corner of VL3 main board shown
VL3 board LonTalk connections
(if no wires, then no LonTalk)
Figure 16-3:
Splitting interlocked terminal blocks
(24 paginas)
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