7
CAUTION
!
Cooling System Operation
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 compres-
sor 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 the thermostat to 40
°
F. All
stages of the cooling system should come on within
five minutes (if the compressor is not operating, it may
be locked out. See LOCKOUT BYPASS OPTION).
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
thermostat.
5.
To enable partial keypad lockout (only the tem-
perature buttons will function; all other buttons will be
disabled and will not operate until configuration is
changed):
Switch #4 in ON position disables all buttons except
and
(see OPERATION GUIDE).
The battery maintains the stored program in the event of
a power failure. When attached to the wall with 24 VAC
power applied, the thermostat will function normally with-
out the battery. However, the program will be lost in the
event of power interruption or failure if the battery is not
installed. When power is restored, the thermostat will
automatically maintain a temperature of 64
°
F or a cooling
temperature of 82
°
F (factory preprogrammed) as needed.
CHECK THERMOSTAT OPERATION
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
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 Operation
1.
Press
SYSTEM
SWITCH
until HEAT is displayed (it may already
be displayed).
2.
Press
to adjust thermostat to 99
°
F. All stages of
the heating system should begin to operate within five
minutes.
ON
1
2
3
4
Switch #1 (see steps 1-2)
Switch #2 (see step 3)
Switch #3 (see step 4)
Switch #4 ON
NOTE
CAUTION
!
LOCKOUT BYPASS OPTION
FOR QUALIFIED SERVICE TECHNI-
CIANS’ USE ONLY. OPERATORS
SHOULD NOT USE THIS FEATURE DUE
TO POSSIBILITY OF EQUIPMENT OR
PROPERTY DAMAGE, OR PERSONAL
INJURY.
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.
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 start-up.