Carrier 48HJ004---007, 48HE003---006 48HE,HJ, EconoMi$er IV Wiring, Outdoor Enthalpy Changeover

FOR OCCUPANCY CONTROL

REPLACE JUMPER WITH

FIELD-SUPPLIED TIME CLOCK

48HE,HJ

LEGEND	Potentiometer Defaults Settings:
DCV— Demand Controlled Ventilation	Power Exhaust	Middle
	Minimum Pos.	Fully Closed
IAQ — Indoor Air Quality
	DCV Max.	Middle
LA — Low Ambient Lockout Device
	DCV Set	Middle
OAT — Outdoor-Air Temperature
	Enthalpy	C Setting
POT — Potentiometer
RAT — Return-Air Temperature

Fig. 36

NOTES:

1.620 ohm, 1 watt 5% resistor should be removed only when using differential enthalpy or dry bulb.

2.If a separate field-supplied 24 v transformer is used for the IAQ sensor power supply, it cannot have the secondary of the transformer grounded.

3.For field-installed remote minimum position POT, remove black wire jumper between P and P1 and set control minimum position POT to the minimum position.

C06028

---EconoMi$er IV Wiring

				BLACK	4
					3
					5
				BLUE	2
	500 OHM				8
	RESISTOR
		VIOLET			6
NOTE 1
		PINK
					7
	RUN
	-			RED	1
NOTE 3
	+				10
50HJ540573
	SENSOR 4 - 20 mA		YELLOW
ACTUATOR					11
ASSEMBLY	OPTIONAL CO2
	OUTPUT				9
	DIRECT DRIVE			WHITE	12
	ACTUATOR

ECONOMISER2 PLUG

NOTES:

1.Switch on actuator must be in run position for economizer to operate.

2.PremierLink™ control requires that the standard 50HJ540569 outside-air sensor be replaced by either the CROASENR001A00 dry bulb sensor or HH57A077 enthalpy sensor.

3.50HJ540573 actuator consists of the 50HJ540567 actuator and a harness with 500-ohm resistor.

C06029

Fig. 37 ---EconoMi$er2 with 4 to 20 mA Control Wiring

Outdoor Enthalpy Changeover

For enthalpy control, accessory enthalpy sensor (part number HH57AC078) is required. Replace the standard outdoor dry bulb temperature sensor with the accessory enthalpy sensor in the same mounting location. (See Fig. 29.) When the outdoor air enthalpy rises above the outdoor enthalpy changeover set point, the outdoor-air damper moves to its minimum position. The outdoor

enthalpy changeover set point is set with the outdoor enthalpy set point potentiometer on the EconoMi$er IV controller. The set points are A, B, C, and D. (See Fig. 45.) The factory-installed 620-ohm jumper must be in place across terminals SR and SR+ on the EconoMi$er IV controller. (See Fig. 29 and 46.)

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