Page 12 • DRI-STEEM Vapor-logic3 to Vapor-logic4 Adaptor Board Installation Manual
Figure 12-1:
Splitting interlocked terminal blocks
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 12-1.
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.
11. Cut an 18-gauge, stranded wire long enough to reach terminals T2
and 33 on Vapor-logic4 adaptor board (Figure 12-2). Strip ends of
wire, land ends at terminals T2 and 33, and torque terminal screws
to 2.5 in-lb (0.28 N·m).
12. Configure either modulating or on-off duct high limit:
• Modulating: Move Vapor-logic3 terminal block 24/25/26 to Pins
24/25/26 on Vapor-logic4 adapter board.
• On-off: Move wire from Vapor-logic3 Pin 26 to Pin 24 of same
terminal block. Then move terminal block to Pins 24/25/26 on
Vapor-logic4 adapter board.
Transferring expansion board terminal blocks
(Vaporstream only)
Some Vaporstream humidifiers have a Vapor-logic3 expansion board.
Vapor-logic4 adaptor board pin locations for Vapor-logic3 expansion
board terminal blocks are labeled , as shown in
Figure 11-1.
Leave the wires in the terminals when transferring the terminal blocks
from the Vapor-logic3 expansion board to the Vapor-logic4 adaptor
board.
Note: To facilitate wire re-routing and provide slack, unbundle wires
as necessary.
Figure 12-2:
Jumpering terminals T2 and 33
Jumper
T2
33
Top edge of VL4
adaptor board
Electric humidifiers:
Board removal and replacement
(24 strony)
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