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FIGURE 20
Balanced Climate Enable/Disable
Temperature Control
When the unit is connected to the LC controller, it
will receive all of its heating, cooling and ventilation
commands from the controller.
When the unit is in orphan mode, it will heat, cool
and ventilate based on the return air temperature
measurement. The return air temperature will
be compared to the cooling setpoint. Based on
differentials above and below the setpoint, the available
cooling and heating stages will be utilized.
Cooling Sequence – Economizer Available
(see Figure 21)
If the return air temperature is higher than 79°F
(Setpoint + Stage 1 Diff On) and outdoor conditions are
acceptable for economizing, the unit will enable the
economizer. If the return air temperature is higher than
Stage 1
Stage 2
Stage 3
72
73
NOTE: Stages available are based on unit configuration. Example: If the unit has a single stage compressor with
a blank-off plate (no economizer), there will be only one stage available for cooling. If there is a two stage
compressor with an economizer, it will operate all three stages when free cooling is available, or two stages
when free cooling is not available.
FIGURE 21
MULTI-TEC Wall-Mount Unit Cooling Staging
Stage 1 Diff Off
Stage 2 Diff Off
Setpoint
74
75
76
77
Off
80°F (Setpoint + Stage 2 Diff On), the unit will enable
mechanical cooling stage 1. If the control value is
higher than 81°F (Setpoint + Stage 3 Diff On), the unit
will enable mechanical cooling stage 2.
Cooling Sequence – Economizer Not Available
(see Figure 21)
If the return air temperature is higher than 79°F
(Setpoint + Stage 1 Diff On), the unit will enable stage
1 mechanical cooling. If the return air temperature is
higher than 80°F (Setpoint + Stage 2 Diff On), the unit
will enable stage 2 mechanical cooling.
To adjust these parameters:
1. Press MENU key to go to the Main Menu screen.
2. Press UP or DOWN keys and ENTER key to enter
USER password 2000.
3. Press UP or DOWN keys to scroll to Sys Config;
press ENTER key.
4. Press UP or DOWN keys to scroll to Cooling Setup
(A2); press ENTER key.
5. Press ENTER key to scroll to Stage 1 Diff On,
Stage 1 Diff Off, Stage 2 Diff On, Stage 2 Diff Off,
Stage 3 Diff On or Stage 3 Diff Off (see Figure 22
on page 16).
6. Press UP or DOWN keys to adjust value.
7. Press ENTER key to save.
Stage 1 Diff On
Stage 2 Diff On
Stage 3 Diff On
Stage 3 Diff Off
78
79
80
Band
On
81
82
83
Manual 2100-725C
Page
15 of 39
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Troubleshooting
