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APPLICATION
The RA889A Switching Relay provides intermediate
switching of line- and low-voltage devices from a line- or
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.
®U.S. Registered Trademark
Copyright © 1999 Honeywell Inc. • All Rights Reserved
Switching Relay
INSTALLATION INSTRUCTIONS
1
4
4
5
1
(29)
32
3
(2) DIAMETER
32
1
(13) DIAMETER
2
1
3
(89)
2
7
(6) DIAMETER MOUNTING HOLE
32
25
3
(20)
1
(35)
32
8
Fig. 1. RA889A dimensions in in. (mm).
X-XX UL
RA889A
(108)
7
1
8
(48)
7
(22) DIAMETER
8
KEYHOLE TYPE
MOUNTING HOLE
1
4
2
(114)
3
(10)
8
3
(10)
8
15
2
16
(75)
7
1
8
(48)
KNOCKOUT FOR
1/2 (13) CONDUIT (3)
M3823A
69-1293-1
1
5
4
(133)
Related Manuals for Honeywell RA889A
Summary of Contents for Honeywell RA889A
- Page 1 Replacement Parts: KNOCKOUT FOR (20) (35) Replacement Fuse: Use a 1A automotive fuse. 1/2 (13) CONDUIT (3) M3823A Fig. 1. RA889A dimensions in in. (mm). ®U.S. Registered Trademark 69-1293-1 Copyright © 1999 Honeywell Inc. • All Rights Reserved X-XX UL...
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Page 2: Installation
— — — — — RA889A has one set of COM/N.O. relay contacts. Use R8845U if two sets are required. RA889A has lower output load rating. Check load requirements. INSTALLATION MOUNTING In replacement applications, mount the new relay in the When Installing this Product . - Page 3 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. CONTROL CASE MUST BE CONNECTED TO EARTH GROUND. USE GROUNDING SCREW PROVIDED. M14301 B1 IS 1/4 IN. TAB TERMINAL. Fig. 3. RA889A hookup for L7148A/L8148A in an oil-fired, tankless hot water, zoned, pump system. 69-1293—1...
- Page 4 CONTROL CASE MUST BE CONNECTED TO EARTH GROUND. L7148F/L8148E USE GROUNDING SCREW PROVIDED. B1 IS 1/4 IN. TAB TERMINAL. M13314 Fig. 4. RA889A hookup for L7148F/L8148E in a gas-fired, 24V, zoned, pump system. R8888 (HOT) L2 3 RA889A CIRCULATOR PUMP 5 20 VA N.O.
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Page 5: Troubleshooting
1 MAKES CONTACT ONLY ON TEMPERATURE FALL. M13316 TROUBLESHOOTING Fig. 6. RA889A thermostat connections. Test Button — This connection is the same as a call for heat connec- FOR 24V THERMOSTAT CONTROL tion between the R(T) and W(T) terminals. - Page 6 RA889A SWITCHING RELAY Automation and Control Solutions Honeywell International Inc. Honeywell Limited-Honeywell Limitée 1985 Douglas Drive North 35 Dynamic Drive Golden Valley, MN 55422 Scarborough, Ontario M1V 4Z9 customer.honeywell.com 69-1293—1 69-1293—1 G.R. Rev. 7-99...