Johnson Controls LX Series User Manual

LX Series Unit Ventilator Controller User's Guide 29
Staged Outputs
You can organize the outputs into stages when there are multiple heating or cooling
outputs. Stages turn on sequentially one after the other. The heating or cooling
stages (n) must be open for the period of time specified in the minimum heating
period before heating or cooling stage (n+1) can turn on. For example, heating
stage 1 must be open for the minimum heating period before duct heating stage 2
turns on. See Figure 14.
Output Selections
There are 31 possible output selections. Several output selections are dependent
upon other output selections. For example, cooling 1–4 can be blocked depending
on the setting of the reversing valve.
Fan Speed 1–3
This output provides digital fan speed control. See the Fan Operation section for
more information on fan speed operation.
Heating Outputs 1–4
Heating outputs one to four are staged outputs that are turned ON after heating
valve outputs, if any, are 100% open.
Cooling Outputs 1–4
Cooling outputs 1-4 are staged outputs, which are turned ON after cooling valve
outputs, if any, are 100% open.
Reversing Valve
The reversing valve has two states. If the reversing valve is defined and is ON,
then cooling outputs 1–3 act as heating outputs.
Time
Minimum
heating
period
Minimum
heating
period
Minimum
heating
period
Heating Effort
Stage 1 ON Stage 1 ON
Stage 2 ON
Stage 1 ON
Stage 2 ON
Stage 3 ON
Heating
commanded to
100% ON at
this time.
Stage 2
turns ON.
Stage 3
turns ON.
100%
Stage 1
turns ON.
Figure 14: Staged Outputs

Johnson Controls LX Series Specifications

General

Brand	Johnson Controls
Model	LX Series
Category	Air Conditioner
Language	English