Nortec NH-EL Series - Manual (Page 55)

Maintenance and Servicing | 52
Condensate Return
The condensate must be collected and removed from the distribution system so that it does not
build up and leak into the duct (or room if blower pack is used). Condensate can be returned to
the NH-EL fill cup to reduce water waste, or can be fed to drain.
Selecting an RH Setpoint
The optimum humidity setpoint depends on the reasons that a space is being humidified. The
“ASHRAE Handbook – HVAC Applications” recommends specific design relative humidities for
specific applications. Also see NORTEC publication “When You Need Humidity” (Form 124A) for
more information on humidity settings.
Health and Comfort - The benefit of humidity is most pronounced for health and comfort in the
40-60% range. A humidity setting of 40-50 % is recommended for this purpose to prevent over
humidifying.
Temperature Setback - In cold climates it is often necessary to reduce the humidity level in a
space to prevent build up of condensation on the inside of exterior walls, windows, and trim. It
is highly recommended that the temperature setback function of the NORTEC digital controls be
used under these conditions to prevent damage from condensation. The digital control with an
outdoor temperature sensor installed will automatically setback the humidity setpoint to
correspond with outdoor temperature.
Duct High Limit – The duct high limit is intended to prevent saturation and wetting in duct work
at high load conditions. NORTEC recommends a setting of 85% for the duct high limit. It may
be necessary to reduce this setting if the duct work is very cold or in contact with exterior cold
surfaces.
Note: The job site design may have specified a setpoint chosen specifically for the site.
Refer to site documentation and where possible use setpoints specifically determined for
the site.