Carrier 48AK, 48EW, 48EY024-068, 48AW, 48AY020-060, 48EK, 48AJ Navigator Display Menu Structure

		M O		D E
		Run		Status
		S
		ervice			Test
		Tem
			peratures
		Pre
		ssures
		Setpoints
	Inputs
	Ou
	Co	tputs
	nfigu
		ration
	Time
O		Clock
	pera
A	larms	ting M	odes

C o
m
	f o
N A	r t		L i	n k
	V I G A
		T O
			R ™

Alarm Status

E S C

NOTE: To utilize Morning Warm-Up mode, the unit occu- pancy schedule must be accessed via Service Tool, Building Supervisor, or ComfortWORKS® software or accessory Remote Enhanced Display. The PC can access the base control board via the 3-wire communication bus or via an RJ-11 con- nection to the CCN terminal on the base control board. See Fig. 27.

For current software (version 3.0 or later), the Low Tem- perature Minimum Damper Position Override (LOWMDP) has a 0 to 100% limit, with a default of 100%. Think of the LOWMDP as a second minimum damper position. This LOWMDP limit change requires access to the unit software

ENTER

Fig. 60 — Navigator Display

MORNING WARM-UP (VAV only with PC Accessed/CCN Operation) — Morning warm-up occurs when the control has been programmed to turn on heat prior to the Occupied mode to be ready for occupancy mode. Morning warm-up is a condi- tion in VAV systems that occurs when the Temperature Com- pensated Start algorithm calculates a biased occupied start time and the unit has a demand for heating. The warm-up will con- tinue into the occupied period as long as there is a need for heat. During warm-up, the unit can continue heating into the occupied period, even if occupied heating is disabled. When the heating demand is satisfied, the warm-up condition will ter- minate. To increase or decrease the heating demand, use Service Tool software to change the Occupied Heating set point.

with a computer equipped with Building Supervisor, Ser- vice Tool, or ComfortWORKS Software.

When the LOWMDP is in effect the outdoor dampers will remain at the LOWMDP position (typically set to 0% closed) during heating, even in the Occupied period. For the LOW- MDP to be in effect the LOWMDP must be less than the mini- mum damper position (MDP) and the RAT (return-air tempera- ture) must be less than the OHSP (occupied heat set point) minus 2.5° F. Table 40 summarizes the operational require- ments and controlling factors for occupied heat and morning warm-up.

MORNING WARM-UP (VAV Only with Stand-Alone Operation) — When the unit operates in stand-alone mode, morning warm-up occurs when the unit is energized in Occu- pied mode and return-air temperature (RAT) is below 68 F. Warm-up will not terminate until the RAT reaches 68 F. The heat interlock relay output is energized during morning warm- up. (A field-installed 24-vdc heat interlock relay is required.) The output will be energized until the morning warm-up cycle is complete. Refer to Fig. 59 for heat interlock relay wiring.

Table 39 — Navigator Display Menu Structure

RUN	SERVICE	TEMPERATURES	PRESSURES	SET	INPUTS	OUTPUTS	CONFIGURATION	TIME CLOCK	OPERATING	ALARMS
STATUS	TEST			POINTS					MODES
						HEAT	Display			Currently
Auto Display	SERVICE	SUPPLY AIR		SETPOINT	COOL			Time		Active
			N/A			OUTPUT	Configuration		N/A
(VIEW)	TEST	TEMPERATURE		SELECT	INPUT#1			(TIME)		Alarms
						1	(DISP)
										(CRNT)
Software				COOLING		HEAT	CCN			Reset all
	HEAT	SUPPLY AIR			COOL			Date		Current
Version			N/A	SETPOINT		OUTPUT	Configuration		N/A
	OUTPUT#1	TEMPERATURE 1			INPUT#2			(DATE)		Alarms
(VERS)				1		2	(CCN)			(RCRN)
								Occupancy
				COOLING		HEAT	Stage Gas	and		Alarm
	HEAT	SUPPLY AIR			HEAT			Unoccupancy
			N/A	SETPOINT		OUTPUT	Configuration			History
	OUTPUT#2	TEMPERATURE 2			INPUT#1			Schedule
				2		3	(CNFG)	Number		(HIST)
								(SCHD)
				HEATING		HEAT				Reset
	HEAT	SUPPLY AIR			HEAT					Alarm
				SETPOINT		OUTPUT
	OUTPUT#3	TEMPERATURE 3			INPUT#1					History
				1		4				(RHIS)
	HEAT			HEATING	SUPPLY	HEAT
				SETPOINT	FAN	OUTPUT
	OUTPUT#4
				2	STATUS	5
	HEAT					HEAT
						OUTPUT
	OUTPUT#5
						6
	HEAT
	OUTPUT#6

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