Honeywell RA89 Installation Manual

R182J, R482J, YHR845A,R847A, RA89A,

RA832A Switching Relays

INSTALLATION INSTRUCTIONS

These relays can be used for a variety of switching applications. Typically they provide control of lineor low-voltage devices by a low voltage controller. See Table 1.

Table 1. Switching Relay Specifications.

					Coil		Contact
		Voltage	Switch	Control	Voltage		Ratings (A)
					(Vac at	Relay Coil
Models	Application	(50/60 Hz)	Action	Circuit	50/60 Hz)	Current (A)	AFL	ALR
R182J	For 24V thermostat control of	120	Dpdt	3-wire	24	0.40a	7.4	44.4
	line voltage devices.	240					3.7	22.2
R482J	Controlled by a line voltage	120		2-wire	120	0.08	7.4	44.4
	controller.
		208/240			208/240	0.04	3.7	22.2
YHR845A	For hot water zone control	120	Dpst		24	0.40	7.4	44.4
	systems or spst control of
	two separate loads.
R847A	Provides switching for high-	120					22	100
	current loads such as cooling
		240					10	50
	compressors.
RA89A	For switching one line	120	Spst				10.2	61.2
	voltage load.
RA832A	For switching two line load	120	Dpst				7.4	44.4
	voltage loads with a common
		240					3.7	22.2
	power source.

aIMPORTANT:

The transformer on the R182 can overheat when used with a series 20 thermostat if the total resistance of the thermostat circuit exceeds 2.5 ohms. If the measured resistance of the thermostat (including thermostat wire and thermostat contact resistance) exceeds 2.5 ohms, add a 100 ohm, 10 watt resistor between the W and R terminals. Table 2 gives maximum thermostat wire runs; if longer runs are necessary, measure the resistance or add a 100 ohm, 10 watt resistor across terminals W and R.

Table 2. Length of Wire.

	AWG	Total Wire		Length of Run to
				Thermostat
	Wire
		Length		(Wires)
	Size
	(Number)	Feet	Meters	Feet	Meters
	22	120	38.0	60	18.0
	20	200	61.0	100	30.5
	18	300	91.5	150	45.5
	16	500	152.5	250	76.0
	14	800	244.0	400	122.0

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R182J, R482J, YHR845A,R847A, RA89A, RA832A SWITCHING RELAYS

INSTALLATION

When Installing this Product

1.Read these instructions carefully. Failure to follow instructions can damage product or cause a hazardous condition.

2.Check the ratings given in the instructions and on the product to make sure the product is suitable for your application.

3.Make sure installer is a trained, experienced service technician.

4.After completing installation, use these instructions to check out product operation.

WARNING

Electrocution Hazard.

Can cause property damage, severe injury, or death.

Transformer core not bonded.

Disconnect power supply before wiring to prevent electrical shock or equipment damage.

Mounting

For replacement, mount the relay in the same location as the old relay. If this is a new installation, locate the relay vertically on a solid wall or partition as close as possible to the device to be controlled. Select a location that is easily accessible for installation and service.

NOTE: To reduce the possible transformer hum and relay noise that is sometimes amplified by mounting surfaces such as sheet metal, plasterboard, and similar materials, place rubber or felt washers between the case and the mounting surface.

1.Position the relay and mark the mounting holes. See Fig. 1.

2.Start a screw for the keyhole type mounting hole in the upper right corner. Screw it down within about 1/ 8 in. (3 mm) of the surface.

3.Hang the relay on the screw, position the case, and start the bottom screw.

4.Tighten both screws.

Wiring

All wiring must comply with all applicable electrical codes, ordinances, and regulations. Follow any instructions furnished with the controlled equipment.

IMPORTANT:

The switching relay terminals are approved for use with copper wires only.

See Fig. 2 through 9 for hookup diagrams for these relays. When two or more devices are to be controlled in parallel, the total current must not exceed the relay load rating. Fig. 10 is an internal view of the RA832A showing terminal locations and barriers.

Never connect load terminals to a load that takes more current than the amount listed in the electrical ratings on the relay.

						4	1	(108)
1	5	(29)					4
32
								1	7
									8
								(48)
									7	(22) DIAMETER
					3	(2) DIAMETER			8
		1			32			KEYHOLE TYPE
			(13) DIAMETER
		2						MOUNTING HOLE
										4	1
											2
										(114)
											5	1
												4
											(133)
				3	1	(89)			3	(10)
7					2				8		3 (10)
	(6) DIAMETER MOUNTING HOLE
											8
32
										215
										16
										(75)
								1	7
									8
								(48)
25	(20)		1 3	(35)				KNOCKOUT FOR
32			8					1/2 (13) CONDUIT (3) M3823B

Fig. 1. Approximate mounting dimensions in in. (mm).

		LOW VOLTAGE (CLASS 2)
		2-WIRE THERMOSTAT
T	T	RA89A (SPST)			2			RA89A
						JUMPER REMOVED
				2		1	3	4
	JUMPER
2	1	3	4	L2	1	L1		TO LOAD
						HOT
				CONTROLLER				1
L2	L1	TO LOAD		(IF USED)
1	HOT

1POWER SUPPLY. PROVIDE OVERLOAD PROTECTION AND DISCONNECT MEANS AS REQUIRED.

2 COMPLETE WIRING AS SHOWN ABOVE.

M3819A

Fig. 2. Internal schematic and typical hookup for RA89A.

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