The Moduline Valve; Final Layout; The Moduline Control Concept - Carrier MODULINE 37HS Application Data

Final Layout —
After these 4 steps are complete, you
are ready to make a final layout.
The final layout should show not only the number and lo-
cation of the Moduline units, but also:
• the round duct size connected to the unit
• the controller location
The Moduline Control Concept —
line system-powered control concept is based on using the
building's primary air supply as a source of energy. The dis-
tribution duct pressure provides energy to operate the con-
trols that modulate the flow of air through the unit. The heart
of this system is a bellows-operated unit air valve, which is
positioned by varying the pressure of the air in the bellows
relative to the supply air pressure in the duct. As the pres-
sure in the bellows approaches the pressure in the supply
duct, the unit air valve opening is reduced, finally closing
completely when the pressures are equal.
• the control tube layout for connecting the master unit (with
• the cfm for the master unit (all slaves will be the same cfm
• the model number of the unit to be used

THE MODULINE VALVE

The 37HS Modu-
with the valve in three positions — shutoff, partially open
and fully open. The valve opening varies with the pressure
of the bellows and the pressure of the plenum.
unit.
istics between Carrier's new Moduline unit (the 37HS) and
the previous design.
41
thermostat) to all its slaves
and need not be indicated)
Figure 32 shows the Moduline terminal in cross section
Figure 33 shows the internal components of the Moduline
Figure 34 shows the comparison of operating character-