Specifications

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Humidifier field wiring
All wiring must be in accordance with all governing codes, and with
the humidifier wiring diagrams. The diagrams are located inside
the removable subpanel cover on the right side of the humidifier
cabinet. Power supply wiring must be rated for 105 °C.
When selecting a location for installing the Vapormist, avoid
areas close to sources of electromagnetic emissions such as power
distribution transformers.
The use of semiconductor fusing sized per the National Electric
Code is recommended with the SSR option.
Grounding requirements
The approved earth ground must be made with solid metal-
to-metal connections and must be a good conductor of radio
frequency interference (RFI) to earth (multistranded conductors).
Ground wire should be the same AWG (mm
2
) size as the power
wiring or sized per NEC requirements (in Europe, IEC 60364
requirements).
Proper wiring prevents electrical noise.
Electrical noise can produce undesirable effects on electronic
control circuits, which affects controllability. Electrical noise is
generated by electrical equipment such as inductive loads, electric
motors, solenoid coils, welding machinery, or fluorescent light
circuits. The electrical noise or interference generated from these
sources (and the effect on controllers) is difficult to define, but
the most common symptoms are erratic control or intermittent
operational problems.
Important:
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effectiveness, wire all humidity, high limit, and airflow controls
using multicolored shielded/screened plenum-rated cable with
a drain wire for the shield/screen. Connect the drain wire to the
shield/screen ground terminal with wire less than 2" (50 mm) in
length.
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WARNING!
Only qualified electrical personnel should
perform field wiring installation procedures.
Improper wiring or contact with energized
circuits can cause property damage, severe
personal injury, or death as a result of
electric shock and/or fire.
WARNING!
Do not remove the humidifier electrical panel
cover or the heater terminal cover until
electrical power is disconnected. Contact
with energized circuits can cause property
damage, severe personal injury, or death as
a result of electrical shock.
VM-IOM-1108.pdf 13 4/21/2010 1:36:20 PM