Installation and Operation Manual
PTU
The PTU contains an internal transformer, which converts 110‐120VAC, or 220‐240VAC input to 24VAC output to
PCU.
110-120 VAC, 60Hz, 3.86A
Or 220-240 VAC 50Hz, 1.96A
110‐120VAC or 220‐240VAC input is optional. A slide switch is used to fulfill this
function. Please refer to Power Supply Wiring section for switch usage information.
Figure 5 AMI (Back)
Figure 6 PTU
10
24VAC