Multi Unit Op. Range - Nortec NHTC Installation And Operation Manual

(Setting Menu Continued)

Multi Unit Op. Range

The NHTC can be configured to network up to sixteen (16) humidifiers (or equivalent of 1600
lb/hr) using a master slave configuration. To operate the NHTC in multi mode;
 ·The humidifiers must be connected in parallel (daisy chained) using the linkup terminal (J2)
on the NHTC driver board (See Multi Mode Wiring on page 28).
 One humidifier must be designated the master and all others as slave units (see Multi Mode
on page 48 for software configuration). The master unit must be the unit to which external
controls / transducers and safety loop are connected.
 Each humidifier in the system including the master must have the range of demand signal in
which it will operate configured (see Multi Unit Op. Range below). Example, for four
humidifiers with equal capacity set the master to operate between 0% and 25%, set the fist
slave for 26% to 50%, set the second slave for 51% to 75%, and set the third slave for 76%
to 100%.
The Multi Unit Op. Range submenu is used to configure the humidifier's operating range when
Multi Mode in the User Defined Settings menu is set to either Master or Slave. The menu is not
displayed if the humidifier is set to Standalone operation. Access the Multi Unit Op. Range
submenu by pressing the menu button while Multi Mode Op. Range is highlighted in the Control
Settings menu.
NOTE: The Multi Unit Op. Range submenu is only displayed if the humidifier has been
configured as either a Master or Slave. It is not displayed in Standalone mode.
Int Time
Int Time should not have to be
changed under normal
conditions. In order to correct for
error inherent in proportional
control, the controller will
increase /decrease output by
Setpoint-Actual humidity. The Int
Time adjusts the frequency at
which the correction is
performed.
Multi Unit Op. Range
Once the humidifier has been
designated as either a master or
slave a Multi Unit Op. Range
selection will be available in the
Control Settings menu.
Operation | 54