Emerson 1F92 manual Compressor Lockout, Economizer Feature

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.

(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 PROPERTY 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.
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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.

(Installer table step 12). This item allows longer Y1 cycles for cooling with outdoor air.

Installation