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1
V3
- The shut-off valve is only in the Australia Control box. When M1 is receiving power from the
VFD, the relay at VFD-R1 closes s24 VDC to V3. Which opens the valve.
VFD
-The Variable Frequency Drive converts incoming single phase power of 50 Hz or 60 Hz
power so the ovens fan can run at the customer desired RPM’s, not to exceed 65 Hz. The VFD
converts the AC supply voltage to DC and then converts the DC to a suitable three-phase frequen-
cy source for M1. The VFD is turned on via the OMC P11-1. A complete VFD manual can be
found at
4
1) Incoming Power
1) Neutral (L1)
2) Line Voltage (L2)
3) Not Used (L3)
4) Ground
2) Digital Inputs
1) Not Used
2) Start / Run
3) Stop Function
4) Not Used
5) Not Used
6) Not Used
7) COM To TS2
3) Main/Exhaust Fan Power
1) Ground
2) Power To Motor (U)
3) Power To Motor (V)
4) Power To Motor (W)
4) ModBus Comm
2
3
OVEN THEORY OF OPERATION