Honeywell W7750A specifications Constant Volume AHU Controller

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

HEAT 1		HEAT 2		COMP 1			COMP2
													LOAD AND
												3	CONTROLLER
				FAN									POWER
														+
													24-VAC
31	30	29	28	27	26	25	24	23	22	21	20	19	18	17	16
W1	W2	Y1	Y2	G	NETWORK DO		Rc	Rh	24 VAC	24 VAC COM		NOT USED
									W7750A
									CONSTANT
									VOLUME AHU
									CONTROLLER
	WALL MODULE								DI GROUND	DI GROUND
EARTH GROUND	LED	BYPASS	SENSOR	AI GROUND	SET PT	AI-1 OHM	AI GROUND	DI- 1			DI- 2	NOT USED	LONWORKS	BUS	LON JACK
1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	J3
												2			BUS
1
										TIME CLOCK					ORKS-
							DISCHARGE								LONW
							AIR TEMP

9	8	7	6	5	4	3	2	1	2
									JACK FOR
		LED	BYPASS	SETPT	SENSOR	GND	BUS-E	BUS-E
									LONWORKS-BUS
									NETWORK
									ACCESS
	T7770C
	WALL
	MODULE

1EARTH GROUND WIRE LENGTH SHOULD BE HELD TO A MINIMUM.

USE THE HEAVIEST GAUGE WIRE AVAILABLE, UP TO 14 AWG (2.O MM2) WITH A MINIMUM OF 18 AWG (1.O MM2), FOR EARTH GROUND WIRE.

2TO ASSURE PROPER ELECTRICAL CONTACT, WIRES MUST BE TWISTED TOGETHER BEFORE INSERTION INTO THE TERMINAL BLOCK.

3 LOAD POWER WIRE CAN BE CONNECTED TO TERMINAL 22. M10085C

Fig. 27. Typical W7750A Controller AHU application wiring diagram. (For more information on note 2, refer to Fig. 25.)

HEAT 1 HEAT 2 COMP 1 COMP2

LOAD POWER

							FAN
												C
										24 VAC				LINE AC
												H
											CONTROLLER POWER
													+
													24-VAC
31	30	29	28	27	26	25	24	23	22	21	20	19	18	17	16
W1	W2	Y1	Y2	G	NETWORK DO		Rc	Rh	24 VAC	24 VAC COM		NOT USED
									W7750A
									CONSTANT
									VOLUME AHU
									CONTROLLER
	WALL MODULE								DI GROUND	DI GROUND
EARTH GROUND	LED	BYPASS	SENSOR	AI GROUND	SET PT	AI-1 OHM	AI GROUND	DI- 1			DI- 2	NOT USED	LONWORKS	BUS	LON JACK
1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	J3
												2
1										TIME CLOCK					BUS
															ORKS-
							DISCHARGE								W
															LON
							AIR TEMP

9	8	7	6	5	4	3	2	1	2
									JACK FOR
		LED	BYPASS	SETPT	SENSOR	GND	BUS-E	BUS-E
									LONWORKS-BUS
									NETWORK
									ACCESS
	T7770C
	WALL
	MODULE

1EARTH GROUND WIRE LENGTH SHOULD BE HELD TO A MINIMUM.

USE THE HEAVIEST GAUGE WIRE AVAILABLE, UP TO 14 AWG (2.O MM2) WITH A MINIMUM OF 18 AWG (1.O MM2), FOR EARTH GROUND WIRE.

2TO ASSURE PROPER ELECTRICAL CONTACT, WIRES MUST BE TWISTED TOGETHER BEFORE INSERTION INTO THE TERMINAL BLOCK.

M10084C

Fig. 28. Typical W7750A Controller with separate

transformer application wiring diagram.

(For more information on note 2, refer to Fig. 25.)

74-2958— 1 38