Honeywell ACM 150 Manual To Installation, Operation, And Maintenance page 33

ACM 150
Electrical Layout
Power DISTRIBUTION PANEL
The AC line power from the main power switch wires into the power distribution
panel, which is shown below. This panel provides grounded receptacles for power
cords wired to the various subassemblies and mechanical pumps in the ACM 150
monitor. Each subassembly has its own DC power supply, if DC power is required.
Power to any subassembly can be disconnected by unplugging it from the power
distribution panel. The power distribution panel is divided into two fused circuits.
• One 120/230 VAC switched receptacle J20 for the Primary Pump. The power is
normally on and is switched off when the vacuum falls below preset levels.
• One 120/230 VAC switched receptacle J21 for the Secondary Pump. The power
is normally switched off and is switched on when the Primary Pump failes. A fault
message is activated "ACTIVATING SECONDARY PUMP".
• Twelve unswitched 120/230 VAC receptacles for all of the powered
subassemblies.
Figure 19. Power distribution panel
Interconnecting cables
On request, Honeywell Analytic can provide a wiring diagram showing all of the
power cords and other interconnecting cables in the ACM 150 monitor and the
connection points for each cable. Refer to this diagram to determine which cord to
unplug when removing power from a specific pump or subassembly. Also, insert
plugs into their receptacles as shown on the wiring diagram when power is restored
to a pump or subassembly.
NOTE
A 24 vdc signal from the Sample Valve Control Panel goes to the Power
Distribution Panel at P1. This controls the Secondary Pump, turning on the
power when inadequate vacuum is sensed. To change back to the Primary
Pump, switch the ACM 150 monitor from the automatic mode to the manual
mode and back to automatic mode, using the Diagnostic menu.
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