Enthalpy Sensor Kit Installation Instructions

Application

Sensors provide input to determine free cooling suitability. The enthalpy sensor provided in this kit senses both sensible temperature and humidity. This kit applies to LGM/LCM, LGH/LCH, KG/KC/KH, ZG/ZC/ZH, QG/QH/QC unit standard performance economizers and LGM/LCM/LGH/LCH high performance economizers. A separate kit is used for KG/KC/KH, ZG/ZC/ZH and QG/QH/QC high performance economizers. Refer to economizer installation instructions.

Note: Differential sensor applications must use the same two sensors.

Warnings and Cautions

Shipping and Packing List

Package 1 of 1 contains:

• 1- Sensor
• 2- #6-32 X 7/8" Screws
• 1- P104 Wiring harness (used for outdoor air sensing only)
• 1- P105 Wiring harness (used for return air sensing only)
• 1- J105 Wiring harness (used on KG/KC/KH092-300S only)
• 1- Bracket (used on LG/LC/KG/KC/KH 092-150 units only)
• 1- Wire tie
• 1- #10-16 X 5/8" SDST screw

IMPORTANT: Two kits must be installed if differential enthalpy sensing is specified.

Check packaging for shipping damage. Contact the last carrier immediately if any shipping damage is found.

Table 1: Outdoor Air Enabled For Free Cooling

*Differential enthalpy not available with ZG/ZC/ZH and QG/QH/QC units.

Install Sensors

Note: Install the return air sensor before installing optional power exhaust dampers and gravity exhaust dampers. If gravity exhaust, power exhaust, or hoods are already installed, remove from unit.

1. Disconnect all power to unit.
2. Remove unit top back panel and retain screws. If economizer is already installed, remove hood.
3. Install sensors as shown in Table 2.

Table 2: Sensor Installation

*P104 not used; disconnect S175, reconnect to A7.

**J105 provided in unit.

***Differential enthalpy not available with ZG/ZC/ZH/QG/QC/QH units.

Specific Unit Installations

Install Sensor - ZG/ZC/ZH 036-150 UNITS

Note: S175 is factory-installed and wired in KG/KC/KH/ZG/ZC/ZH 024-300S economizers. Kit P104 harness is not used. When replacing S175 with an A7 enthalpy sensor, wire A7 with disconnected S175 wires.

1. Remove factory-installed S175 outdoor air sensible sensor and bracket.
2. Disconnect wiring to S175 and reconnect to A7 enthalpy sensor.
3. Install A7 enthalpy sensor using S175 bracket holes. Secure with screws provided in kit.

Note: All contents of kit may be discarded except for the sensor and screws. Harnesses are not used in this application.

Diagram Description: Shows a horizontal unit with labels for S175 and a connection point.

Install Sensor - QG/QC/QH 036-150 UNITS

1. Install sensor in the location shown above.
2. Plug the red and black wires from the controllers "SO" and "SO+" terminals into the sensors + and - terminals.
3. Discard unused harnesses.

Diagram Description: Shows a vertical unit with labels for Sensor Location and Controller Location.

Wiring Instructions

Wire A7 Sensor

Note: S175 is factory-installed and wired in KG/KC/KH/ZG/ZC/ZH 024-300S economizers. Kit P104 harness is not used. When replacing S175 with an A7 enthalpy sensor, wire A7 with disconnected S175 wires.

1. Connect P104 harness plug to unit J104. See figure 1 for 024-090 units, figure 2 for 092-150 units, and figure 3 for 156-300S units.
2. Connect the wires on the other end of the harness to A7 terminals S and + as marked on the wires. Make sure polarity is correct.

Note: Wiring to sensor is shown on D or D1 economizer wiring section. D or D1 is located on the compressor access panel or packaged with economizer.

Wire A62 Sensor - LG/LC/KG/KC/KH

Note: Discard J105 harness provided in kit when installing LGH/LCH units.

1. Connect P105 harness plug to unit J105. See figure 1 for 036-072 units, figure 2 for 092-150 units, and figure 3 for 156-300S units. On KG/KC/KH units refer to Wire A6 section in this instruction to install J105.
2. Connect the wires on the other end of the harness to A62 terminals S and + as marked on the wires. Make sure polarity is correct.
3. Reinstall gravity exhaust damper, power exhaust, and outdoor air hood when applicable.

Note: Wiring to sensor is shown on D or D1 economizer wiring section. D or D1 is located on the compressor access panel or packaged with economizer.

Wire A6 Control - KG/KC/KH Units Only

1. Install J105 harness jack in panel as shown in figure 8 for 024-090 units, figure 9 for KG/KC/KH 092-150 units and figure 3 for 180-300S units.
2. Remove resistor between A6 enthalpy control terminals SR+ and SR. See figure 7.
3. Connect the two leads from the wire harness to SR+ and SR terminals on the A6 control. Note the labeling on the wires for correct wiring.
4. Turn A6 control setpoint dial completely clockwise to position "D". See figure 7.

Controller Configuration

Prodigy 2.0 M3 Unit Controller Configuration

Configure the Unit Controller for the enthalpy sensor use using the following menu: Go to SETUP / INSTALL and navigate through the various setup questions until Configuration ID 1 appears. Position two needs to set to either S for economizer - single enthalpy or D for economizer - dual enthalpy.

Prodigy M4 Unit Controller Configuration

Configure the unit through the mobile app. Go to SETUP / RTU Menu > Setup Install and navigate through the various setup questions until Configuration ID 1 appears. Position two needs to be set to either S for economizer - single enthalpy or D for economizer - dual enthalpy.

Note: Refer to M4 Setup Guide provided with the unit for more info.

Operation

Refer to Unit Controller manual for start-up and operation.

Diagrams

Figure 1: Install Sensors - LGM/LCM/LGH/LCH/KG/KC/KH 024-090 UNITS

Diagram Description: Shows the sensor and harness connections for outdoor and return air sensors on specific unit models.

Figure 2: Install Sensors - LG/LC/KG/KC/KH 092-150 UNITS

Diagram Description: Illustrates the placement of outdoor and return air sensors for LG/LC/KG/KC/KH 092-150 units.

Figure 3: Install Sensors 156-300S UNITS

Diagram Description: Depicts the sensor installation for 156-300S unit models, including division panel and control connections.

Figure 4: Install A62 Bracket - LG/LC/KG/KC/KH 092-150 UNITS

Diagram Description: Shows how to install the A62 bracket for the return air sensor on LG/LC/KG/KC/KH 092-150 units.

Figure 5: Install Sensor - ZG/ZC/ZH 036-150 UNITS

Diagram Description: Illustrates the sensor installation for ZG/ZC/ZH 036-150 units, including removal of the S175 sensor.

Figure 6: Install Sensor - QG/QC/QH 036-150 UNITS

Diagram Description: Shows the sensor installation for QG/QC/QH 036-150 units, indicating sensor and controller locations.

Figure 7: A6 CONTROL - KG/KC/KH APPLICATIONS ONLY

Diagram Description: A wiring diagram for the A6 control, showing resistor removal and setpoint dial.

Figure 8: WIRE A6 ENTHALPY CONTROL KG/KC/KH 024-090 UNITS ONLY

Diagram Description: Wiring diagram for A6 enthalpy control on KG/KC/KH 024-090 units.

Figure 9: WIRE A6 ENTHALPY CONTROL KG/KC/KH 090-150 UNITS ONLY

Diagram Description: Wiring diagram for A6 enthalpy control on KG/KC/KH 090-150 units, showing harness routing.