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Installation
1 S F J O T U B M M B U J P O $ I F D L M J T U
☐ See Figure 8-1 for field terminal block locations. Note that
field wiring connection locations on the Vapor-logic4 board are
surrounded with a white border.
☐ See the figure on the next page for instructions on how to make
wiring connections.
☐ See the wiring drawings and manuals that shipped with your
humidifier.
☐ When making field connections, do not route low voltage wires
near the line voltage area in the humidifier control cabinet. Do
not route low voltage wires in the same conduit as line voltage
wires.
☐ Humidistat, room/duct transmitter, temperature sensor, and
airflow proving switch wiring must be minimum 18-gauge
(1 mm
2
) plenum rated, shielded (screened), twisted pair wire
with a bare drain wire for grounding.
☐ Connect the shield (screen) wire [with a length less than 2"
(50 mm)] to the shield (screen) ground terminal on the electric
subpanel. Do not ground the shield (screen) wire on the
humidistat or transmitter end.
More Checklist on the next page ▶
Figure 8-1:
Vapor-logic4 control board detail
Board detail showing white border
Terminals P-11
through P-16
have a white
border on the
Vapor-logic4
board. This
is where you
will make
most of your
field wiring
connections.
Full board
Field
connection
terminals have
labels printed
on a white
border.
