LG PQDSBC1 Owner's Manual
10
Dry Contact for Economizer
Due to our policy of continuous product innovation, some specifications may change without notification.
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Configuring the Fixed Setpoint Function
Turn the power off at the nearest disconnect before installing or servicing the equipment.
Electrical shock may cause physical injury or death.
The dry contact allows you to configure a fixed setpoint temperature for the connected indoor unit. This function can be enabled or disabled
The dry contact allows you to configure a fixed setpoint temperature for the connected indoor unit. This function can be enabled or disabled
according to your requirements. When the indoor unit is unlocked, the setpoint temperature can be changed by a system central controller.
1. Ensure power is off before performing this procedure.
2. To disable the fixed setpoint function, position switch 1 of DIP switch SETTING_SW to OFF. Do not perform the remainder of this procedure.
3. To enable the fixed setpoint function, position switch 1 of DIP switch SETTING_SW to ON.
4. For the initial temperature setting, position the rotary switch TEMP_SETTING to 0 (64°F).
5. If additional wiring or configuration are required, continue to the following procedures.
6. If you are finished wiring and configuring the dry contact, reapply power and press the reset switch (Figure 1, item 11).
1. Ensure power is off before performing this procedure.
2. To disable the fixed setpoint function, position switch 1 of DIP switch SETTING_SW to OFF. Do not perform the remainder of this procedure.
3. To enable the fixed setpoint function, position switch 1 of DIP switch SETTING_SW to ON.
4. For the initial temperature setting, position the rotary switch TEMP_SETTING to 0 (64°F).
5. If additional wiring or configuration are required, continue to the following procedures.
6. If you are finished wiring and configuring the dry contact, reapply power and press the reset switch (Figure 1, item 11).
Figure 9: Configure Fixed Setpoint
0 1 2 3 4 5 6 7
64 66 68 70 72 74 76 77
Set rotary switch as necessary (0 – F) for desired temp.
TEMP SW
Setting
8 9 A B C D E F
78 80 82 84 86 86 86 86
Temp
Setting °F
TEMP SW
Setting
Temp
Setting °F
Setting the Control Mode
The dry contact control mode is set with rotary switch CONTROL_MODE_SW on the PCB. Available settings are 0 through E (F is unused).
The specific operating mode is selected by the states of Input A and Input B. The two inputs allow four combinations of ON/OFF conditions.
The dry contact controls indoor unit operation according to the selected mode when there is a change in the input A and B signals.
1. Ensure power is off before performing this procedure.
2. Position rotary switch CONTROL_MODE_SW as required for your system. Refer to the tables below for details of each mode,
3. If additional wiring or configuration are required, continue to the following procedures.
4. If you are finished wiring and configuring the dry contact, reapply IDU power, press the dry contact reset switch (Figure 1, item 11), and
1. Ensure power is off before performing this procedure.
2. Position rotary switch CONTROL_MODE_SW as required for your system. Refer to the tables below for details of each mode,
3. If additional wiring or configuration are required, continue to the following procedures.
4. If you are finished wiring and configuring the dry contact, reapply IDU power, press the dry contact reset switch (Figure 1, item 11), and
reinstall the dry contact front cover.
INSTALLATION