Johnson Controls LX Series User Manual

LX Series Unit Ventilator Controller User's Guide74
Fan-Valve Configuration
On this screen, you select the type of fan input, fan operation, and floating valve
operating properties (Figure 33).
Turn ON Heat Stage
1 before using
Modulated Heating
This option normally applies to a situation where a gas-heating system
needs to energize a contact before modulating the gas-heating valve.
Cooling
Occupied/Bypass
Enter the cooling setpoint for the occupied and bypass states.
Standby Enter the cooling setpoint for the standby state.
Unoccupied Enter the cooling setpoint for the unoccupied state.
Minimum Discharge
Temperature
Enter the minimum temperature of the discharge air that you allow during
the cooling state.
Mechanical
Minimum Time ON
Enter the minimum ON time for both heating and mechanical cooling.
Minimum Time OFF Enter the minimum OFF time for mechanical heating and cooling.
Minimum Outdoor
Temperature
Enter the minimum outdoor air temperature at which mechanical cooling is
allowed. Mechanical cooling disables when the outdoor air temperature is
less than this value.
Switch Over Delay The time interval that must pass before mechanical cooling can occur after
free cooling or free cooling can occur after mechanical cooling.
Economizer
Maximum Outdoor
Temperature
Enter the value below which free cooling is permitted when only the
outdoor air temperature is available and not the outdoor humidity or
enthalpy.
Maximum Outdoor
Enthalpy
Enter the value below which free cooling is permitted when only the
outdoor air enthalpy, and not the indoor air enthalpy, is available.
Heat/Cool Change Over
Heat/Cool Change
Over
The time interval that must pass before heating can occur after cooling or
cooling can occur after heating.
Table 16: Heating-Cooling Configuration Parameters
Field Description

Johnson Controls LX Series Specifications

General

Brand	Johnson Controls
Model	LX Series
Category	Air Conditioner
Language	English