Hardware Set up
The following describes the hardware configuration required
for proper 2-stage thermostat operation. For complete
controller installation details, please see TC-1 Installation
Guide and related advisories.
Power the TC-1 via appropriate mains voltage and
wire per TC-1 Installation Instructions.
Attached a TP-1 temperature probe to the controller's
probe bus. Install a TP-1 temperature probe in an
appropriate location for sensing glycol temperature.
Use shielded CAT-5 cable to extended the probe
cables as needed being sure to ground the shield only
inside controller. Do not exceed 50' of total probe
cable length. If using two probes, be sure to attach
the probes in a bus topology (e.g., from controller to
TP-1 and then from TP-1 to TP-2). Make all cable
splices as close to the probes as possible and use only
moisture-proof, gel-filled IDC connectors for splices.
Ensure that shield is contiguous from controller
through to TP-2.
Wire RELAY 1 to the solenoid or valve that controls
STAGE 1 of the chiller
Wire RELAY 2 to the solenoid or valve that controls
STAGE 2 of the chiller
Attach network cable to the controller per Echelon FT
wiring guide. Networking is optional.
Software Set up
Enter program mode by pressing and releasing the
PGM button
Press the PGM button to advance to the 'CC' and turn
this menu item 'On' via the UP or DOWN button
Press the PGM button to advance to 'diF' (thermostat
differential) and adjust as desired via UP/DOWN
buttons