Manual 2100-725C
Page
15 of 39
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
(Se 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
FIGURE 21
MULTI-TEC Wall-Mount Unit Cooling Staging
Stage 1 Diff On
Stage 2
Stage 1
74
75
76
77
78
79
80
81
82
83
Off
Band
On
72
73
Stage 1 Diff Off
Stage 2 Diff Off
Stage 3
Stage 3 Diff Off
Stage 3 Diff On
Stage 2 Diff On
Setpoint
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.
80°F (Se Stage 2 Diff On), the unit will enable
mechanical cooling stage 1. If the control value is
higher than 81°F (Se 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
(Se Stage 1 Diff On), the unit will enable stage
1 mechanical cooling. If the return air temperature is
higher than 80°F (Se 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.
