Part No. EM-KIT
SAFETY CONSIDERATIONS
Only trained, qualified personnel and service mechanics should install electrical accessories on packaged terminal air conditioners or heat pumps. Please contact your local electrical contractor, dealer, or distributor for assistance.
INTRODUCTION
These instructions are procedures for field installation of the Energy Management (EM) Accessory Control with Freeze Guard, to be installed on standard packaged terminal products. Freeze Guard protection prevents the room temperature from dropping below 40 F.

The EM Accessory Kit permits the individual units to be turned off from a remote location, such as from a hotel control desk, to conserve energy when the room is unoccupied.

NOTE: In order to operate the Freeze Guard, the unit must be in HEAT mode. The Freeze Guard activates electric heat until the room reaches 60 F.

The EM Accessory Kit includes the following:

1 - EM control assembly (Fig. 1)
1 - Terminal board cover
5 - Screws
1 - 1-in. bushing
1 - Freeze Guard thermostat

FIGURE 1 - ENERGY MANAGEMENT (EM) CONTROL ASSEMBLY

INSTALLATION
1. Check to be sure unit is off and power to unit is disconnected.

2. Remove front panel from the unit by grasping the panel firmly near the top of both sides and pulling up, then forward (Fig. 2).

FIGURE 2 - REMOVING FRONT PANEL FROM UNIT

3. To open control box and install EM accessory kit, remove the 2 control box cover screws shown in Fig. 3 and swing the cover down to open. Save the screws.

4. Remove the knockouts from control box cover for both the 1-in. bushing and the terminal board (see Fig. 3).

FIGURE 3 - CONTROL BOX (EXTERNAL VIEW)

5. Install the EM control assembly onto the inside of the control box cover (Fig. 4) and attach it with the 3 screws provided in the kit.

6. Remove the wire from L1 on the unit push button switch and place it on L1 of the EM relay (Fig. 4).

FIGURE 4 - CONTROL PANEL (INTERIOR VIEW)

7. Run the yellow wire from T1 on the EM relay to L1 on the unit push button switch (Fig. 4).

8. Install the 1-in. bushing into the hole created by removing the knockout in Step 4 (Fig. 3).

9. Take the wires from the Freeze Guard thermostat (Fig. 3) and pass them through the 1-in. bushing installed in Step 8.

10. Connect the insulated flag terminal (on one of the Freeze Guard thermostat wires) to the unused terminal connection on the coil side of the EM relay. Connect the straight female non-insulated terminal (on the other Freeze Guard thermostat wire) to the G terminal on the EM accessory terminal board (Fig. 4).

11. Close the control box and reinstall the 2 screws removed in Step 3 (Fig. 3).

12. Pass field-supplied low-voltage wires through the bushing on the terminal board cover (Fig. 3) and connect the wires to the terminal board as shown in Fig. 5.

13. Install the terminal board cover and Freeze Guard thermostat. Place the terminal board cover on the front of the control box cover as shown in Fig. 3. Using one of the 2 screws remaining in the EM accessory kit, screw in the right screw. Place the Freeze Guard thermostat screw hole over the left terminal board screw hole and screw in place. Tighten both screws.

14. Connect low-voltage (24 vac) field-supplied wires to the control desk panel (Fig. 5).

FIGURE 5 - EM ACCESSORY WIRING SCHEMATIC

IMPORTANT: The manufacturer currently does not supply any control desk equipment. This equipment should be handled through your local electrical contractor.

15. Replace the front panel and restore electrical power to the unit.

CONTROL DESK OPERATION
Requirements:

Coil Inrush Volt Amps (VA) - 21
Coil Sealed VA - 10.5

The contacts on the relay provided with the EM Accessory Kit are normally closed. Therefore:

if the control desk provides 0 volts (no power) to the terminal board, the unit operates normally.

if the control desk provides 24 vac to the terminal board, the EM relay contacts open and the unit is disabled.