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VCCX2 Controller Technical Guide
Modulating Heating Device
The Modulating Heating Device signal voltage output is a user-
adjustable signal with a range of 0-10 VDC from AO3 when
programming the controller. The output signal can be congured
for either direct acting or reverse acting operation as required.
The output signal is normally used to control a Modulating Hot
Water Valve or Modulating Steam Valve or is used for SCR
Control of an Electric Heating Coil.
See Figure 22, this page for detailed wiring of the Modulating
Heating Device.
WARNING: It is very important to be certain that all
wiring is correct as shown in the wiring
diagram below. Failure to observe the
correct polarity could result in damage
to the Modulating Heating Device or the
VCCX2 Controller.
Figure 22: Modulating Heating Device Wiring
WIRING
Modulating Heating Device
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