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17
SYSTEM CONFIGURATION
ANY TIME AN OPTION SWITCH IS CHANGED,
THE 9 VOLT ENERGIZER
®
BATTERY MUST BE
REMOVED FOR A MINIMUM OF 2 MINUTES.
NOTE
SET OPTION SWITCHES
1. Single Stage Compressor Heat Pump — with
reversing valve energized through B or O termi-
nals
2. Two Compressor (Split) System
Figure 8. Back of thermostat
Option switches 9-pin connector
4-pin connector
Battery
W18
ON
1234
Switch #1
Switch #2
Switch #3
Switch #4 (see step 6)
OFF
OFF
OFF
W1 Y1
Field jumper W1 & Y1
ON
1234
Switch #1
Switch #2
Switch #3
Switch #4 (see step 6)
OFF
ON
OFF
W1 Y1
Field jumper W1 & Y1