Manual 2100-670
Page
11 of 32
FIGURE 8
Viewing Unit Stages
FIGURE 9
Cooling w/No Economizer
Compressor Stage 1
10%
20%
30%
40%
50%
60%
70%
80% 90% 100%
-10%
0%
110% 120%
Compressor Stage 2
Off
Deadband
On
Deadband (sometimes called a neutral zone or dead zone) is an interval of a signal domain or band where no action occurs
FIGURE 10
Heating
-10%
10%
30%
50%
70%
90%
110%
Electric Heat
Off
Deadband
On
Deadband (sometimes called a neutral zone or dead zone) is an interval of a signal domain or band where no action occurs
The unit is equipped with 1 stage of freecooling and
2 stages of mechanical cooling (compressor and
solenoid). However, the outdoor conditions are not
favorable for economizer operation so there are a total
of 2 cooling stages (see Figure 9).
Heating
The unit is equipped with 1 stage of electric heat (see
Figure 10).
Staging
The unit will stage the cooling components based on
the cooling demand referenced in the temperature
control. The unit will stage the economizer on first if
the indoor and outdoor conditions are favorable. The
compressor stage 1 will be enabled next as the demand
increases. Finally, the compressor stage 2 will be
enabled as the demand continues to increase.
The unit is only equipped with one stage of heat and
will turn on based on the heating demand.
To view unit stages:
1. From the Status screen, press UP or DOWN key
until Quick Menu displays Unit Information icon
( ). Press ENTER key.
2. The cooling and heating demand are visible on
this screen. The unit stages will display here when
active as FC, CL1, CL2 or H1 (see Figure 8).
