Carrier 39L specifications Example 20 Ð Reading and Changing System Set Points

Reading and Changing Set Points Ð Example 20 shows how to read and change system set points. Other set points can be changed by following the same procedure. Refer to Table 13 for the display sequence of set points in each sub- function.To adjust any parameter after enabling the func-

tion, press	until desired parameter is displayed. Key in
new value	and press	. If input is within the allowable

range, the display shows the parameter and new value. If the input is not within the allowable range, the old value remains displayed.

Example 20 Ð Reading and Changing

System Set Points

KEYBOARD	DISPLAY	COMMENTS
ENTRY	RESPONSE
	SETPOINT	System set points
	OHSP 68.0	Present occupied heating set point
		is 68.0
	OHSP 70.0	Key in 70 and press ENTR, display
		shows new occupied heating set
		point is 70, which is within the
		allowable range
	OCSP 78.0	Present occupied cooling set point
		is 78.0
	OCSP 78.0	Key in 30 and press ENTR, display
		still shows occupied cooling set point
		as 78.0 because 30 is not within the
		allowable range. See Table 15
	OCSP 75.0	Key in 75 and press ENTR, display
		shows new occupied cooling set
		point is 75.0, which is within the
		allowable range

Reading and Changing Time and Date Display Ð Time is entered and displayed in 24-hour (military) time. The day of the week is entered as a number: 1 = MON, 2 = TUE...7 = SUN. The month is also entered as a number: 1 = JAN, 2 =

FEB...12 = DEC. The key is used as the colon when entering the time and date. See Example 21.

Reading and Changing Daylight Savings Time Ð Example 22 shows how to read and change daylight savings time. The month is entered as a number: 1 = January, 2 = February...12

=December. The day of week and time of day are entered as explained in Reading and Changing Time and Date Display above.

Example 21 Ð Setting of Time and Date

KEYBOARD	DISPLAY	COMMENTS
ENTRY	RESPONSE
	TIME	Time display
		subfunction of
		set point function
	MON 16:00	Current setting
		is Monday,
		4:00 pm
	TUE 13:05	New setting of
		Tuesday,
		1:05 pm is
		entered and
		displayed
	JAN 01 96	Current setting
		is January 1,
		1996
	FEB 27 96	New setting of
		February 27,
		1996 is entered
		and displayed

Example 22 Ð Setting Daylight Savings Time

KEYBOARD	DISPLAY	COMMENTS
ENTRY	RESPONSE
	DAYLIGHT	Daylight savings time ®eld
		con®guration of set point
		function
	ENM X	Month when daylight savings
		time begins
	ENM 4	Daylight savings time
		con®gured to start Month 4
		(April)
	END X	Day of month when daylight
		savings time begins
	END 16	Daylight savings time
		con®gured to start on the
		16th of the month
	ENT X	Time of day when daylight
		savings time begins
	ENT 2.00	Daylight savings time
		con®gured to start at 2:00 am
		on the 16th of April
	LVM X	Month when daylight savings
		time ends
	LVM 11	Daylight savings time
		con®gured to end Month 11
		(November)
	LVD X	Day of month when daylight
		savings time ends
	LVD 12	Daylight savings time
		con®gured to end on the 12th
		of November
	LVT X	Time of day when daylight
		savings time ends
	LVT 2.00	Daylight savings time
		con®gured to end at 2:00 am
		on November 12

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