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CHECK THERMOSTAT OPERATION
FAN OPERATION
1. Turn on power to the system. If the auxiliary heat
source has a standing pilot, be sure to light it.
2. Press
FAN
SWITCH
until FAN ON is displayed. The blower
should begin to operate.
3. Press
FAN
SWITCH
until FAN AUTO is displayed. The
blower should stop operating within approximately
one minute.
HEATING SYSTEM
1. Press
SYSTEM
SWITCH
until HEAT is displayed (it may al-
ready be displayed).
2. Press to adjust thermostat to 99°F. All stages of
the heating system should begin to operate within
approximately five minutes. However, if the PUMP
LED is flashing, the compressor lockout feature is
operating (see Lockout Bypass Option to tempo-
rarily override the compressor lockout feature during
testing).
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
SWITCH
until COOL is displayed.
2. Press to adjust thermostat to 40°F. All stages of
the cooling system should begin to operate within
approximately five minutes. However, if the PUMP
LED is flashing, the compressor lockout feature is
operating (see Lockout Bypass Option to tempo-
rarily override the compressor lockout feature during
testing).
EMERGENCY MODE OPERATION
1. Press
SYSTEM
SWITCH
until EMER is displayed. The red
EMER LED should be lit continuously (non-flashing),
regardless of system cycling.
2. Press to adjust thermostat about 5°F above
room temperature. Any systems (such as electric
strip heaters, fossil fuel systems, etc.) that are wired
or jumpered to the emergency circuit (thermostat
terminal E1) should begin to cycle.
After the system has been checked and is running prop-
erly, determine if automatic changeover is desired (see
SYSTEM CONFIGURATION).
Refer to the OPERATION GUIDE if you need additional
information on thermostat operation.
TROUBLESHOOTING
Refer to the Question & Answer section of the OPERA-
TION GUIDE for information on troubleshooting the ther-
mostat.
CAUTION
!
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
PRGM
and
VIEW
TEMP
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.