Nortec LiveSteam v.2 - Manual (Page 9)

LS Installation Manual | 6
System 4 - Dual Duct
Figure 5: Dual Duct
This system usually requires two steam distributors. The primary load (LOC.1) will go upstream
of the fan. The humidistat is located after the fan and before the hot and cold decks. The
secondary load (LOC. 2) will go downstream to the mixing boxes and will be controlled by a
humidistat in the space. Please consult your Nortec agent if absorption distance is a problem.
High limit humidistat is recommended in the mixed air duct.
System 5 - Primary And Secondary Distributors
Figure 6: Primary and Secondary Distributors
On occasion you may need a secondary load to reach a higher RH level in one part of your
operation (i.e. Hospitals). In this case, the primary load will maintain the normal space
condition (70°F at 35% RH) and the secondary load will satisfy the higher RH level (70°F at
45% RH) needed for that zone. High limit humidistats are recommended for each duct.