Figure 16 - Typical Control Diagram For Three Stage Cooling (Dsh120C) - Johnson Controls DSH024C Series Installation Operation & Maintenance

SECTION 1 – INSTALLATION
Thermostat
Terminals
1
W1
1
W2
1
W3
2
Y1
2
Y2
2
Y3
2
Y4
G
R
C
3
RC
4
OCC
5
X
Terminals on a
Limited Number of
Thermostats
NOTES
1. Unit is capable of supporting up to three stages of discrete heating.
2. Unit is designed to support three stages of discrete cooling.
3. Jumper is required for any combination of R, RC, or RH.
4. OCC is an output from the thermostat to indicate the occupied condition.
5. X is an input to thermostat to display the error status.
6. Jumper is required if no option is installed between SD-24 and SD-R.

FIGURE 16 - TYPICAL CONTROL DIAGRAM FOR THREE STAGE COOLING (DSH120C)

26
Main Control
Terminal Block
W1
W2
Y1
Optional field installed jumper is required if desired to
G
change the unit logic to a two stage cooling operation
Y2
OCC
C
X
24V
R
SD–24
SD
SD–R
C
R
Expansion Board
Terminal Block
Y3
Y4
W3
ISSUE DATE: 04/08/2019
Common TRF
24V Input
Optional Condensate
Overflow Switch
Standard Jumper
6
(If No Options)
Optional Smoke
Detector
24V Input
Optional field installed jumper is required if desired to
change the unit logic to a two stage cooling operation
FORM 145.32-IOM5
LD27707