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RA889A SWITCHING RELAY
Manu-
facturer
Model
Honeywell RA889A
Honeywell RA89A b
b
Honeywell R182A
Honeywell R182B
a
Honeywell R182C
Honeywell R482B
a
Honeywell R482C
a
Honeywell R482J
b
Honeywell R882A
Honeywell R882B
a
Honeywell R882C
a
Honeywell R882J
a
RA889A has one set of COM/N.O. relay contacts. Use R8845U if two sets are required.
b
RA889A has lower output load rating. Check load requirements.
INSTALLATION
When Installing this Product . . .
1. Read these instructions carefully. Failure to follow
them could damage the product or cause a hazard-
ous condition.
2. Check the ratings given in the instructions and on
the product to make sure the product is suitable for
your application.
3. Installer must be a trained, experienced service
technician.
4. After installation is complete, check out product
operation as provided in these instructions.
5. Follow local codes for installation and application.
WARNING
Electrocution Hazard.
Power supply can cause severe injury,
or death.
Transformer core not bonded.
Disconnect power supply before wiring.
69-1293—1
Table 1. RA889A Replacement Cross Reference.
Input Line
Voltage
Power Relay
L1
L2
COM
N.O.
1
2
3
1
2
7
1
2
8
1
2
8
1
2
8
1
2
8
1
2
6
—
—
8
—
—
8
—
—
8
—
—
6
Connections
Low Voltage
Relay
N.C.
X1
X2
4
—
—
—
8
—
B
R
6
7
B
R
6
7
B
R
6
7
—
—
6
7
—
—
8
7
—
—
7
—
—
—
6
7
—
—
6
7
—
—
8
7
—
—
MOUNTING
In replacement applications, mount the new relay in the
same location as the old relay. For new installations,
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 sheetmetal,
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 in the upper right corner for the
keyhole type mounting hole. 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.
2
Thermostat
W(T) R(T)
C
—
T
T
— —
See Fig. 8
Jumper L1 to COM and
thermostat
between X1 and R(T) in
connections.
RA889A.
Requires jumper
between X1 and R(T)
Jumper R(T)
Line voltage switched
to W(T).
inputs go to L1 and L2.
See Fig. 7B.
Line voltage inputs
go to L1 and L2. See
Fig. 7B.
W
—
B
—
W
—
B
W
—
B
1
—
2
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