7
Figure 11 — Thermostat
Figure 4 — Terminal and Switch Location
Figure 5 — Anticipation selection switch settings
5.
Level the thermostat. Tighten the two mounting screws.
6.
Replace the thermostat cover.
Do not mount the thermostat where it may be affected by:
•
drafts or dead-air spots behind doors and in corners.
•
hot or cold air flow from ducts.
•
radiant heat from sun or appliances.
•
concealed pipes or chimneys.
•
unheated (uncooled) areas behind thermostat, such as an outside
wall.
The thermostat is a precision instrument and was carefully adjusted at the
factory. Handle it carefully.
CAUTION: Disconnect power supply before beginning installation of
thermostat to prevent electrical shock or equipment damage. Do not short
across thermostat terminals. This can burn out the thermostat anticipator.
B.
Thermostat Mounting and Wiring
All wiring for the thermostat circuit must comply with NEC, state and local
codes. Use No. 20 AWG color-coded, insulated (35°C minimum) wire. If
thermostat is located more than 100 ft from unit (as measured along the
control voltage wires), use No. 18 AWG color-coded wires to avoid
excessive voltage drop.
1.
In replacement applications, check the existing thermostat wiring for
cracked or frayed insulation. Replace any wiring in poor condition. All
wiring must comply with local codes and ordinances.
2.
Run wiring (if necessary) to the location. Thread wires through hole
in the packing material saved in step 2. Connect the wires to the
terminals on the back of the thermostat. (See Figure 12.)
3.
Push the excess wire back through the hole and plug any opening with
packing material to prevent drafts that may affect thermostat perfor-
mance.
4.
Loosely secure the thermostat to the wall with screws through the two
mounting holes in the middle of the thermostat. The sheetmetal
screws included with the thermostat are designed for use in a plas-
ter wall and anchors are not needed.
VII. THERMOSTAT MOUNTING AND WIRING
A.
Thermostat Location
Locate the thermostat about 5 ft. above the floor in an area with good
circulation at average indoor temperature.
Table 2 — Second Stage Heat and Emergency Heat
Table 1 — First Stage Heat and Cool
10
14
16
30
0.8°F
1.1°F
1.3°F
2.4°F
10
14
16
30
0.3°F
0.4°F
0.5°F
0.9°F
Anticipation
Reference
Number
Approximate
Temperature
Differential
Approximate
Temperature
Differential
Anticipation
Reference
Number
