Johnson Controls VMA1400 Series - VMA Internal Schematic Diagram

Mounting and Wiring VMA1400 Series Controllers Technical Bulletin
32
VMA Internal Schematic Diagram
The small diagram in Figure 18 is a key diagram showing the different
regions of the larger schematic diagram in Figure 19.
1. Isolated Power Supply
2. Earth Ground Connection
3. Airflow and
High Temperature
Safety Switches
4. Isolated Triacs
and Proper Wiring
5. Valve Actuators
6. Zone Bus
vmadia3
Figure 18: Key to Internal Schematic Diagram (Figure 19)