White Rodgers 1F95-391 Compressor Off Delay, Balance Point Temperature, Compressor Lockout

COMPRESSOR OFF DELAY

Installer table, step 11 is available if the

fossil fuel kit alternative option (PUMP OFF) is selected.

This item allows a selection of 0 to 99 seconds, which is the time that the compres- sor will continue to run after the point that the auxiliary heat is energized. Running the compressor after the Auxiliary has started prevents cool air from creating drafts prior to the heat exchanger reaching normal tempera- tures. The factory default value of 60 seconds is typical for most systems. Consult with your equipment’s manufacturer before increasing this time.

BALANCE POINT TEMPERATURE

Installer	table step 12, bPT, is available only
if the fossil fuel kit option is selected and the
outdoor temperature sensor is used (see the
user menu in the owner manual).
This item allows a selection of 5 to 50			° F,
which is the outdoor temperature below
which the thermostat will not energize heat
pump compressor stages. It will use
Auxiliary heat stages (only) until the outdoor
temperature raises 3		° above the selected
temperature and then allow compressor
stages to operate. The factory default value
of 35 °	F is typical for most systems.

BALANCE POINT

Installer table step 13, bP, is available only if the fossil fuel kit option is selected and the outdoor temperature sensor is not used. The Balance Point influences when second stage comes on. The factory default creates

approximately 1 ° F between stages. Increas- ing the setting decreases the separation

between stages. Decreasing the value increases stage separation. This adjustment allows a small change in the operation of your heat pump system versus your auxiliary system relative to the thermostat adjustment.

PROGRAMMABLE BLOWER BALANCE POINT

Installer table step 14, bbP, is available only when configured for Heat Pump systems, and wired as shown in Fig. 3.

If the system is running a high percentage of the time due to cold weather conditions, the output vent air temperature may be cooler than normal thus creating a drafty room condition. This feature will reduce the draft by lowering the blower speed with the DHM terminal. The lower speed will make the air temperature slightly warmer and more comfortable.

Example: If you want the blower to go to a lower speed when the system is running greater than 50% of the time,then reduce the Blower Balance Point to 50%.

To turn this feature OFF, press to 99

then press once more to display OFF.

COMPRESSOR LOCKOUT.

(Installer table step 15). This thermostat is capable of helping to protect the system against premature compressor failure by “locking out” the compressor for at least five minutes after each cycle. When the thermo- stat 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 TECH-

NICIANS’ USE ONLY.

HOMEOWNERS SHOULD NOT USE

THIS FEATURE DUE TO POSSIBIL-

ITY OF EQUIPMENT OR PROP-

ERTY 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 operation,			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. How-
ever, if your system does not have short-
cycle protection,			turn COMP LOCK ON		.
This will protect the compressor 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			.

DISABLING AUTOMATIC

CHANGEOVER MODE.

(Installer table step 16). This thermostat, as configured at the factory, provides automatic changeover, which allows the thermostat to switch between heating and cooling to maintain temperature. In this configuration, when you press the SYSTEM button, the thermostat will go through HEAT-OFF- COOL-AUTO modes (HEAT-EMER-OFF- COOL-AUTO for heat pumps). Select HEAT(-EMER)-OFF-COOL to disable the automatic changeover feature.

Pump
Stage		Decreasing	Stage separation
		Indoor
Fossil			1˚F at setting 05
	Higher number	temperature
Auxiliary
	Lower number
Stage

(Continued)

		HEATING			COOLING
Anticipation Value	Cycle Length		Differential Temperature	Cycle Length		Differential Temperature
1–8	Shorter		0.4–0.6°F (0.2–0.3°C)	N/A		N/A
9–20	Longer		0.6–1.0°F (0.3–0.6°C)	Shorter		0.6–1.0°F (0.3–0.6°C)
21–40	Hydronic		1.0–1.6°F (0.6–0.9°C)	Longer		1.0–1.6°F (0.6–0.9°C)

These numbers are approximate and represent operation with a typical system. Actual temperature differentials and run times may vary widely based on your building and equipment, as well as outdoor temperature conditions.

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