T10 — REMOTE SPACE TEMPERATURE SENSOR OR DUAL LEAVING WATER TEMPERATURE SENSOR —
One of two inputs can be connected to
T10 — Remote Space Temperature Sensor — Sensor T10 (part no. 33ZCT55SPT) is an accessory sensor that is remotely mounted in the controlled space and used for space tempera- ture reset. The sensor should be installed as a
Space temperature sensor wires are to be connected to terminals in the unit main control box. The space temperature sensor includes a terminal block (SEN) and a RJ11 female connector. The RJ11 connector is used access into the Sterlco Comfort Network (SCN) at the sensor.
To connect the space temperature sensor (Fig. 9):
1.Using a 20 AWG twisted pair conductor cable rated for the application, connect 1 wire of the twisted pair to one SEN terminal and connect the other wire to the other SEN terminal located under the cover of the space temperature sensor.
2.Connect the other ends of the wires to terminals 5 and 6 on TB5 located in the unit control box.
Units on the SCN can be monitored from the space at the sensor through the RJ11 connector, if desired. To wire the RJ11 connector into the SCN (Fig. 10):
IMPORTANT: The cable selected for the RJ11 connector wiring MUST be identical to the SCN communication bus wire used for the entire network. Refer to Table 5 for acceptable wiring.
1.Cut the SCN wire and strip ends of the red (+), white (ground), and black
2.Insert and secure the red (+) wire to terminal 5 of the space temperature sensor terminal block.
3.Insert and secure the white (ground) wire to terminal 4 of the space temperature sensor.
4.Insert and secure the black
5.Connect the other end of the communication bus cable to the remainder of the SCN communication bus.
T10 — Dual Leaving Water Temperature Sensor — For dual chiller applications (parallel only are supported), connect the dual chiller leaving fluid temperature sensor (5 kΩ ther- mistor, Sterling part no. HH79NZ029) to the space temperature input of the Master chiller. If space temperature is required for reset applications, connect the sensor to the Slave chiller and configure the slave chiller to broadcast the value to the Master chiller.
LEGEND FOR FIG. 1-6
ALMR | — | Alarm Relay |
BR | — | Boiler Relay |
C— Contactor, Compressor
CB | — Circuit Breaker |
CCB | — Compressor Circuit Breaker |
CHC | — Cooler/Pump Heater Contactor |
COMP | — Compressor |
CWFS | — Chilled Water Flow Switch |
CWP | — Chilled Water Pump |
DPT | — Discharge Pressure Transducer |
EMM | — Energy Management |
FIOP | — factory Installed Option |
FM | — Fan Motor |
GND | — Ground |
HPS | — |
HR | — Heat Relay |
ICP | — Inrush Current Protection |
IP | — Internal Protection Thermostat |
LWT | — Leaving Water Temperature |
MBB | — Main Base Board |
MLV | — Minimum Load Valve |
MS | — Manual Starter |
OAT | — |
OL | — Overload |
R— Relay
SPT | — | Suction Pressure Transducer |
SW | — | Switch |
T— Thermistor
TB | — Terminal Block |
TNKR | — Storage Tank Heater Relay |
TRAN | — Transformer |
| Terminal Block |
| Terminal (Unmarked) |
| Terminal (Marked) |
| Splice |
| Factory Wiring |
| Field Wiring |
| Accessory or Option Wiring |
| To indicate common potential only; |
| not to represent wiring. |
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