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12
TMP040 / TMP070 – 3-Way Mixing Panels
Installation, Operation, and Maintenance
Panel Control Sequence
1. When the power cord from the PLC
1
is plugged in, and the 24Vac Plug-in Transformer
2
is plugged in, the Green LED
on the PLC will be lit indicating that the panel is powered with 110V.
2. When the thermostat calls for heat, its internal 24V contacts close, the auxiliary terminals close, and the pump turns on.
4. As the circulator
3
moves fluid through the panel the thermostatic mixing valve adjusts the fluid temperature based on
the user settings (page 6).
5. When the requirements of the thermostat are met, the internal contacts of the thermostat open, the auxiliary contacts
open, and the circulator stops.
6. The circulator is activated once every 24 hours, for 15 minutes, to ensure that potable water in the piping is not stagnant.
2
3
1
