Specifications

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Figure 12-2:
Field wiring requirements
Fused
disconnect
(provided by
installer)
Power
supply
(provided
by installer)
OM-1007
Notes:
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dedicated or separate earthed metal conduit, cable
trays, or trunking.
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control circuit wiring when routing electrical wiring
inside the humidifier cabinet.
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carrying commons. Never use a safety ground as a
conductor or neutral to return circuit current.
WARNING!
DRI-STEEM strongly recommends installing a
duct airflow proving switch and a duct high
limit humidistat. These devices prevent a
humidifier from making steam when there is
low airflow in the duct or when the RH level
in the duct is too high. Failure to install these
devices can result in excessive moisture in
the duct, which can cause bacteria and mold
growth or dripping through the duct.
Figure 12-1:
Shielded/screened cable drain wire connection to lug
Shield/screen
ground lug
Vapor-logic
®
3
keypad on front
of cabinet
Microprocessor
board
OM-1505
/PUF
For maximum EMC effectiveness, all humidity, temperature, and airflow controls should
be wired using multicolored shielded/screened plenum-rated cable with a drain wire
for the shield/screen. The drain wire should be connected to the shield/screen ground
terminal with its length kept to less than 2" (50 mm).
Vapormist side view
VM-IOM-1108.pdf 14 4/21/2010 1:36:21 PM