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ADJUSTABLE ANTICIPATION
The first stage has anticipation that can be set to 2.5 or
4 cycles per hour for heating or cooling. The second stage
heat has a fixed anticipation. To change the first stage
anticipation in the HEAT mode, place the SYSTEM switch
in the OFF position. While holding the button, move the
SYSTEM switch to HEAT. The display will show S for
slow (factory setting) or F for fast. Release the button
when the desired anticipation setting is displayed.
CHECK THERMOSTAT OPERATION
If at any time during testing your system does not operate
properly, contact a qualified serviceperson.
Fan Operation
1. Turn on power to the system.
2. Move SYSTEM switch to OFF position.
3. Move FAN switch to ON. The blower should begin to
operate.
4. Move FAN switch to AUTO position. The blower should
stop within a short period of time.
Heating System
1. Move SYSTEM switch to HEAT position. If the auxil-
iary heating system has a standing pilot, be sure to
light it.
2. Press to adjust thermostat setting to 90° and hold
for five seconds. Both stages of the heating system
should begin to operate. However, if the word HEAT is
flashing, the compressor lockout feature is operating
(see Lockout Bypass Option to temporarily override
the compressor lockout feature during testing).
3. Press to adjust temperature setting below room
temperature. The auxiliary heating system will stop
immediately, and the first stage will stop within three
to four minutes.
Cooling System
To prevent compressor and/or property dam-
age, if the outdoor temperature is below 50°F,
DO NOT operate the cooling system.
1. Move SYSTEM switch to COOL position.
2. Press to adjust thermostat setting below room
temperature. The blower should come on immediately
on high speed, followed by cold air circulation. How-
ever, if the fan is running but the compressor is not
running and the word COOL is flashing, the compres-
sor lockout feature is operating (see Lockout Bypass
Option to temporarily override the compressor lockout
feature during testing).
3. Press to adjust temperature setting above room
temperature. The cooling system should stop oper-
ating.
CAUTION
!
LOCKOUT BYPASS OPTION
FOR QUALIFIED SERVICE TECHNICIANS’ USE
ONLY. OPERATORS SHOULD NOT USE THIS FEA-
TURE 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, move the SYS-
TEM switch to OFF position for 6 to 10 seconds then
back to the desired mode.
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.