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M-AP-001-EN Rev. Q
Table 4-1 Control Wiring Details
Table 4-2 Jumper Details
I/O
Description
COM (shield)
Shield for RS-485 communication.
Modbus RS-485 NetB/NetA
Modbus over RS-485 communication port.
Stepper Motor 1 Phase 1A, 1B, 2A,
2B and
Stepper Motor 2 Phase 1A, 1B,
2A, 2B
Optional output connections for controlling the main electronic expansion
valve (evaporator) or auxillary electronic expansion valve (economizer or load
balancing valve). 200ma Maximum output on each driver. Valve frequency
will effect operational characteristics.
Level 15V (Evaporator)
Power supply for level sensor #1.
Sensor Signal (Evaporator)
Input from a level sensor to control the main expansion valve (evaporator).
Level 15V (Economizer)
Power supply for level sensor #2.
Sensor Signal (Economizer)
Input from a level sensor to control the auxiliary expansion valve (economizer).
Demand 0 - 10V
Analog input from customer-supplied controller to drive the compressor, i.e.,
0 - max. kW input with a deadband of 2VDC for the respective compressor
model. Only available in 3.1.4; removed in 4.x forward.
Interlock
Connects to a set of external normally closed contacts that typically open in
the event of loss of chilled water or air flow. Typically a 1.5VDC Output signal.
NOTE: This is not a safety certified interlock.
Status
An internal normally open contact that is closed during normal operation
and opens in the event of a compressor fault. With the circuit open, the
compressor will not restart until the demand signal has been reset to 0 (via
chiller/unit controller). Circuit rated at 1A @ 30VDC/24VAC or .03A @ 120VAC.
Liquid Temperature
Optional input for monitoring temperature. The temperature sensor must be
an NTC type 10K @ 25°C thermistor.
Run
An internal N/O contact that is closed while the compressor is running.
The speed at which the contact closes is user-configurable via the monitor
program. Circuit rated at 1A @ 30VDC/24VAC or 0.3A @ 120VAC.
Analog
Universal analog output manually controlled as a percentage of total voltage
written through Modbus. This can be configured for 0-5V or 0-10V via on
board jumpers.
Entering Chilled Water Temp
Analog input indicating water temperature. The temperature sensor must
be an NTC type 10K @ 25°C thermistor. Refer to Application Manual for
thermistor specification.
Leaving Chilled Water Temp
Analog input indicating water temperature. The temperature sensor must
be an NTC type 10K @ 25°C thermistor. Refer to Application Manual for
thermistor specification.
Spare T +/-
Optional input for monitoring temperature. The temperature sensor must be
an NTC type 10K @ 25°C thermistor.
Spare P +/-
Can be connected to a 0-5V type pressure sensor.
Jumper
Function and Set-Up
JP1
Determines the operating voltage range (0-5V or 0-10V) of the ANALOG
output. If used, set the jumper to the appropriate range.
JP2
Modbus termination jumper: install the jumper if Modbus is used and if the
Modbus connection is at the end of a run.
ENTRY
Install the jumper if there is no temperature sensor connected to the
“Entering Chilled Water” analog input.
LEAVE
Install the jumper if there is no temperature sensor connected to the “Leaving
Chilled Water” analog input.
JP5/ JP6
Jumpers J5 and J6 are used to match the characteristics of the liquid level sensors.
Voltage-type Level Sensor
- If using a voltage-type sensor with 15V supply
and 0-5V signal, install jumpers between LVL pins 2a and 3a, and pins 2b
and 3b. Connect the sensor leads to the +, S, and - terminals on the Interface
module. Consult vendor documentation for sensor lead identification.
Resistive-type Float Sensor
- If using a resistive-type sensor, install jumpers
between LVL pins 1a and 2a, and pins 1b and 2b. Connect the sensor leads to
the - and S terminals on the Interface module.
Superheat Control
- For superheat control (adjustable via the compressor
control monitoring program), install jumpers between LVL pins 2a and 3a,
and pins 2b and 3b (also, for no liquid sensor connected).
JP7
Supplies 5VDC to pin 1 on the 9-pin connector to power an optional Bluetooth
adapter. Install if Bluetooth device is being used in RS-232 connection (DB9).
Summary of Contents for TGH Series
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