19
Installation
using this feature instead of a kit.
This item will allow the thermostat
to turn the heat pump compressor
off if the auxiliary is on for more
than one minute, to prevent
compressor head pressure from
getting too high. To use this feature
instead of a kit, select PUMP OFF.
COMPRESSOR LOCKOUT.COMPRESSOR LOCKOUT.
COMPRESSOR LOCKOUT.COMPRESSOR LOCKOUT.
COMPRESSOR LOCKOUT.
(Installer table step 11). This
thermostat is capable of protecting
the system against premature
compressor failure by “locking out”
the compressor for at least five
minutes after each cycle. When the
thermostat is in compressor lockout,
the word COOL will flash on the
display. With heat pump systems,
the word HEAT will flash if the
lockout occurs during a heat cycle.
During this period, the compressor
will not be energized.
Lockout Bypass Option
FOR QUALIFIED SERVICE
TECHNICIANS’ USE ONLY.
HOMEOWNERS SHOULD
NOT USE THIS FEATURE
DUE TO POSSIBILITY OF
EQUIPMENT OR PROPER TY
DAMAGE, OR PERSONAL
INJURY.
COMPRESSOR SHORT TERM
CYCLE PROTECTION
If this thermostat has been
configured to provide short-cycle
protection, during the 5-minute
lockout period the thermostat will
lock out the compressor to allow
head pressure to stabilize. To
override this feature for one cycle
while testing thermostat opera-
tion, press SET
TIME
and SET
DAY
buttons at the same time.
If the system has short-cycle
protection, this item should not need
to be enabled. However, if your
system does not have short-cycle
protection, turn COMP LOCK
ON. This will protect the compres-
sor from short-cycling and potential
premature compressor failure.
Note that COMP LOCK OFF
permanently disables compressor
lockout. If you need to temporarily
disable compressor lockout, please
see Lockout Bypass Option.
ECONOMIZER FEATURE.ECONOMIZER FEATURE.
ECONOMIZER FEATURE.ECONOMIZER FEATURE.
ECONOMIZER FEATURE.
(Installer table step 12). This item
allows longer Y1 cycles for cooling
with outdoor air.