Honeywell RA889 Installation Manual
APPLICATION
The RA889A Switching Relay provides intermediate switching of lineand low-voltage devices from a lineor low-voltage controller and is typically applied in hydronic heating systems.
SPECIFICATIONS
Electrical Ratings:
Voltage: 120 Vac, 60 Hz.
Thermostat Heat Anticipator Setting: 0.12A.
Transformer Ratings:
Primary: 120 Vac, 60 Hz.
Secondary: 24 Vac, 12 VA maximum; 9 VA available for external loads. Secondary is protected by replaceable 1A automotive fuse.
Contact Ratings:
15 AFL, 30 ALR; maximum connected load 2000 VA.
Switching Action:
Spdt, plus extra low voltage Spst.
Electrical Connections:
No. 8 captivated wire clamp screw terminals.
Dimensions:
See Fig. 1.
Cross Reference:
The RA889A replaces many Honeywell models. See Table 1 for additional cross reference information.
Replacement Parts:
Replacement Fuse: Use a 1A automotive fuse.
RA889A
Switching Relay
INSTALLATION INSTRUCTIONS
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1/2 (13) CONDUIT (3) M3823A |
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Fig. 1. RA889A dimensions in in. (mm).
®U.S. Registered |
Trademark |
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69-1293-1 |
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Copyright © 1999 |
Honeywell Inc. • All Rights Reserved |
X-XX UL |
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RA889A SWITCHING RELAY
Table 1. RA889A Replacement Cross Reference.
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Connections |
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Manu- |
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Input Line |
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Low Voltage |
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facturer |
Model |
Voltage |
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Power Relay |
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Relay |
Thermostat |
Comments |
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Honeywell |
RA889A |
L1 |
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L2 |
COM |
N.O. |
N.C. |
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X1 |
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X2 |
W(T) |
R(T) |
C |
— |
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Honeywell |
RA89Ab |
1 |
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2 |
3 |
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4 |
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— |
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— |
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T |
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T |
— |
— |
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Honeywell |
R182Ab |
1 |
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2 |
7 |
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8 |
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— |
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B |
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R |
See Fig. 8 |
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Jumper L1 to COM and |
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thermostat |
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between X1 and R(T) in |
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connections. |
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RA889A. |
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Honeywell |
R182B |
1 |
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2 |
8 |
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6 |
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7 |
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B |
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R |
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Requires jumper |
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between X1 and R(T) |
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Honeywell |
R182Ca |
1 |
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2 |
8 |
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6 |
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7 |
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B |
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R |
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Honeywell |
R482B |
1 |
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2 |
8 |
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6 |
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7 |
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— |
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Jumper R(T) |
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Line voltage switched |
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to W(T). |
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inputs go to L1 and L2. |
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Honeywell |
R482Ca |
1 |
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2 |
8 |
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6 |
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7 |
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— |
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— |
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See Fig. 7B. |
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Honeywell |
R482Ja |
1 |
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2 |
6 |
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8 |
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7 |
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— |
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— |
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Line voltage inputs |
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go to L1 and L2. See |
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Fig. 7B. |
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Honeywell |
R882Ab |
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8 |
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7 |
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W |
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B |
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Honeywell |
R882B |
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8 |
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6 |
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7 |
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W |
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B |
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Honeywell |
R882Ca |
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8 |
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6 |
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7 |
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W |
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B |
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Honeywell |
R882Ja |
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6 |
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8 |
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7 |
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1 |
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2 |
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a RA889A |
has |
one |
set |
of |
COM/N.O. relay |
contacts. Use |
R8845U |
if two |
sets |
are |
required. |
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b RA889A |
has |
lower |
output |
load |
rating. |
Check load |
requirements. |
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INSTALLATION
When Installing this Product . . .
1.Read these instructions carefully. Failure to follow them could damage the 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.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.
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.
69-1293—1 |
2 |
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