STS32/STS32H Touchscreen Programmable Thermostat
Fig. 7. Selecting terminal identifications for system type.
18
WIRING (FIG. 9 - 21)
All wiring must comply with local electrical codes and ordinances.
1.
Select set of terminal identifications (Table 1) that corresponds with system type
(conventional or heat pump in Fig. 7).
2.
Loosen the screws for the appropriate system type selected; see Table 1. See Table 2 for
terminal designation descriptions. Insert wires in the terminal block under the loosened screw.
See Fig. 8.
3.
Securely tighten each screw.
4.
Push excess wire back into the hole.
5.
Plug the hole with nonflammable insulation to prevent drafts from affecting the thermostat.
6.
See Fig. 9 through 21 for typical wiring hookups.
CONVENTIONAL
HEAT PUMP
SCREW
TERMINALS
S1 S2 C R RC E L Y2 Y G
S1 S2 C R RC W W2 Y2 Y G
O/B AUX
STS32/STS32H Touchscreen Programmable Thermostat
Table 1. Selecting Terminal Identifications for System Type.
System Type
Wallplate Terminal
Identifications
Wiring Diagram
Reference
Standard Heat/Cool
Conventional
9, 10
Heat Only
Conventional
11
Heat Only with Fan
Conventional
12
Heat Only Power to open and power to
close zone valves
Conventional
13
Normally Open Zone Valves Heat Only
Conventional
14
Cool Only
Conventional
15
Standard Multistage up to 2 Heat/2 Cool
Conventional
16, 17
Heat Pump with No Auxiliary Heat
Heat Pump
18, 19
Heat Pump with Auxiliary Heat
Heat Pump
20, 21
19
