Carrier 38TDB Make Airflow Selections, Airflow Selection for 58CVA/58MVP Furnaces

PROGRAMMABLE			FK4C, FV4A
THERMOSTAT							TWO-SPEED
MODEL 2S			OR 40FK			AIR CONDITIONER
			FAN COIL
					DH	J1
24 VAC HOT		R			R	JUMPER	R
FAN		G			G
					Y1		Y1
COOL STAGE 1	Y1/W2
COOL STAGE 2		Y/Y2		Y/Y2			Y2
HEAT STAGE 1					W1	REMOVE
		W/W1				J2 JUMPER
HEAT STAGE 2						FOR HEAT
		O/W2			W2	STAGING
24 VAC COMM		C			C		C
N/A		B			O
OUTDOOR		S1
SENSOR
CONNECTION		S2

THERMIDISTAT	FK4C, FV4A			TWO-SPEED
CONTROL	OR 40FK		AIR CONDITIONER
MODEL RH	FAN COIL
HEAT STAGE 2 O/W2
		W2

			REMOVE J2 JUMPER
HEAT STAGE 1	W/W1	W1	FOR HEAT STAGING
COOL STAGE 1 Y1/W2		Y1	Y1
COOL STAGE 2	Y/Y2	Y/Y2	Y2
FAN	G	G
24 VAC HOT	R	R	R
		O	REMOVE
			J1 JUMPER
DEHUMIDIFY	DHUM	DH
24 VAC COMM	C	C	C
HUMIDIFY	HUM	HUMIDIFIER
		(24 VAC)

N/A		B
			OUTDOOR
OUTDOOR	S1		SENSOR
SENSOR	S2
CONNECTION

See notes 1, 2, 3, 5, and 7
	A01493
PROGRAMMABLE	VARIABLE-SPEED	TWO-SPEED
	CONDENSING
THERMOSTAT
	FURNACE	AIR CONDITIONER
MODEL 2S

See notes 1, 2, 3, 6, 7, 8, and 9 A01494

HEAT STAGE 2	O/W2
COOL STAGE 1	Y1/W2
HEAT STAGE 1	W/W1
COOL STAGE 2	Y/Y2
FAN	G
24 VAC HOT	R

24 VAC COMM		C
N/A		B
OUTDOOR	S1
SENSOR
CONNECTION	S2

W2

Y1

W/W1

Y/Y2 Y2

G

R R

DEHUM

DE JUMPER

CC

HUM

See notes 1, 2, 3, and 5

A01507

Fig. 11—Typical 24V Wiring Diagram (Cont)

required. The LCC for standard PSC blower products consists of a standard humidistat which opens contacts on humidity rise and a pilot duty relay with 24v coil.

NOTE: If an LCC is desired, low-speed airflow must be main- tained so that a minimum of 300 CFM/ton can be supplied during high speed LCC operation.

Step 9—Make Airflow Selections

AIRFLOW SELECTION FOR 58CVA/58MVP FURNACES

The 58CVA/58MVP Non-Condensing Variable Speed Furnaces provide high- and low-speed blower operation to match the capacities of the compressor at high and low speeds. To select the recommended airflow and for adjustments to the manual switches labeled SW1, A/C and CF on the control board refer to the furnace Installation, Start-Up, and Operating Instructions. The 315AAV utilizes a control center that allows the installing technician to select the proper airflows. The A/C switch determines the airflow during high speed compressor operation. Airflow for hight and low speed can be calculated at either 350 CFM per ton or 400 CFM per ton based on the positions of SW1-5.

AIRFLOW SELECTION FOR FK4C, FV4A, OR 40FK FAN COILS

The FK4C and FV4A provide high- and low-speed blower operation to match the capacities of compressor at high and low speeds. To select recommended airflow, refer to the FK4C, FV4A, or 40FK Installation Instructions. The FK4C, FV4A, and 40FK utilize an EASY SELECT control board that allows the installing technician to select proper airflows. For adjustments to control board and recommended A/C SIZE and CFM ADJUST selections. This fan coil has an adjustable blower off delay factory set at 90 sec for high- and low-speed blower operation.

For other combinations of equipment consult the Product Data Digest.

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