Wiring Diagram; Sequence Of Operation - Vulcan-Hart VBP5 Service Manual

V Series Heated Holding Insulated Cabinets - ELECTRICAL OPERATION

SEQUENCE OF OPERATION

1. Conditions.
A. Unit connected to correct voltage and is
properly grounded.
B. Power switch is off.
2. Power switch turned on.
A. Relays K1 and K2 are de-energized
(contacts N.O.).
B. Controller board performs diagnostic test
and verifies temperature input signal is
present.
F45748 (0219)

WIRING DIAGRAM

Fig. 35
3. Fan relay K2 is energized, K2 contacts close and
power the fans.
4. Based on temperature and humidity settings, the
board determines whether K1 relay will be
energized to power element.
5. Adjust temperature to desired level.
6. Turning power switch off stops heating cycle.
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