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2. Manual Changeover (Heating/Cooling Systems
Only)
3. Heat Only Systems
4. Cool Only Systems
5. Computed Energy Management Recovery (EMR)
— With EMR enabled, system will be energized
before the next program period begins, to achieve
programmed temperature by the beginning of the
next program period.
C. ELECTRIC HEAT SYSTEMS
For central electric heat systems where the blower is
energized by a separate circuit through the fan relay
(meaning that the fan turns on immediately on call for
heat), clip wire W14 on the back of the thermostat (see fig.
13). If the thermostat is energizing electric heat sequenc-
ers, DO NOT clip wire W14.
CHECK THERMOSTAT OPERATION
When checking thermostat, Group B option switches #1
and #2 for automatic changeover must be in the OFF
position. This will allow temporary setting of heat setpoints
above cool setpoints. After system checkout, reset Group
B option switch #1 to ON position if automatic changeover
is desired (see SET GROUP B OPTION SWITCHES).
FAN OPERATION
1. Turn on power to the system. If the heat source has
a standing pilot, be sure to light it.
2. Press
FAN
ON – AUTO
until FAN ON is displayed. The blower
should begin to operate (this will work only on sys-
tems with a G terminal).
3. Press
FAN
ON – AUTO
until FAN AUTO is displayed. The
blower should stop operating within approximately
one minute.
ON
123
Switch #1 OFF
Switch #2 OFF
Switch #3 (see step B5)
ON
123
Switch #1 OFF
Switch #2 ON
Switch #3 (see step B5)
ON
123
Switch #1 ON
Switch #2 ON
Switch #3 (see step B5)
ON
123
Switch #1 (see steps B1–B4)
Switch #2 (see steps B1–B4)
Switch #3 OFF
NOTE
HEATING SYSTEM
1. Press
SYSTEM
HEAT-OFF-COOL-AUTO
until HEAT is displayed (it may already
be displayed).
2. Press to adjust thermostat above room tem-
perature to call for heat. The heating system should
begin to operate.
COOLING SYSTEM
To prevent compressor and/or property damage,
if power to the compressor has been off or
interrupted for more than 1 hour and the outdoor
temperature is below 50°F, DO NOT operate the
system for at least the amount of time the com-
pressor was off! This will allow the compressor
heaters to warm the compressor oils to avoid
damage due to slugging.
1. Press
SYSTEM
HEAT-OFF-COOL-AUTO
until COOL is displayed.
2. Press to adjust thermostat below room tem-
perature to call for cool. The blower should come on
immediately, followed by cold air circulation. How-
ever, if the red LED on the thermostat front is flashing,
the compressor lockout feature is operating (see
Lockout Bypass Option to temporarily override the
compressor lockout feature during testing).
After the system has been checked and is running prop-
erly, determine if automatic changeover is desired (see
SYSTEM CONFIGURATION).
LOCKOUT BYPASS OPTION
FOR QUALIFIED SERVICE TECHNICIANS’ USE
ONLY. OPERATORS SHOULD NOT USE THIS
FEATURE DUE TO POSSIBILITY OF EQUIPMENT
OR PROPERTY DAMAGE, OR PERSONAL INJURY.
COMPRESSOR SHORT TERM
CYCLE PROTECTION
This thermostat has a built-in short term (5-minute)
time delay. During this 5-minute period, the thermo-
stat will lock out the compressor to allow head pres-
sure to stabilize. If you want to override this feature
while testing thermostat operation, simply press
VIEW
TEMP
and
VIEW
PRGM
buttons at the same time at initial startup.
DO NOT USE THE LOCKOUT BYPASS OPTION
UNLESS THE COMPRESSOR OIL HEATERS HAVE
BEEN OPERATIONAL FOR 6 HOURS AND THE
SYSTEM HAS NOT BEEN OPERATIONAL FOR AT
LEAST 5 MINUTES.
CAUTION
!