HONEYWELL RA89A Switching Relays Instruction Manual
- June 17, 2024
- Honeywell
Table of Contents
HONEYWELL RA89A Switching Relays
These relays can be used for a variety of switching applications. Typically they provide control of line- or low-voltage devices by a low voltage controller. See Table 1.
Table 1. Switching Relay Specifications
Models
| ****
Application
| ****
Voltage (50/60 Hz)
| ****
Switch Action
| ****
Control Circuit
| Coil Voltage (Vac at 50/60 Hz)| ****
Relay Coil Current (A)
| Contact Ratings (A)
---|---|---|---|---|---|---|---
AFL| ALR
R182J| For 24V thermostat control of line voltage devices.| 120| Dpdt| 3-wire|
24| 0.40a| 7.4| 44.4
240| 3.7| 22.2
R482J| Controlled by a line voltage controller.| 120| 2-wire| 120| 0.08| 7.4|
44.4
208/240| 208/240| 0.04| 3.7| 22.2
YHR845A| For hot water zone control systems or spst control of two separate
loads.| 120| Dpst| 24| 0.40| 7.4| 44.4
R847A| Provides switching for high- current loads such as cooling
compressors.| 120| 22| 100
240| 10| 50
RA89A| For switching one line voltage load.| 120| Spst| 10.2| 61.2
RA832A| For switching two line load voltage loads with a common power source.|
120| Dpst| 7.4| 44.4
240| 3.7| 22.2
IMPORTANT
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
Wire Size
(Number)
|
Total Wire Length
| Length of Run to Thermostat (Wires)
---|---|---
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
INSTALLATION
When Installing this Product
- Read these instructions carefully. Failure to follow instructions can damage product or cause a hazardous condition.
- Check the ratings given in the instructions and on the product to make sure the product is suitable for your application.
- Make sure installer is a trained, experienced service technician.
- 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.
- Position the relay and mark the mounting holes. See Fig. 1.
- 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.
- Hang the relay on the screw, position the case, and start the bottom screw.
- 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
- POWER SUPPLY. PROVIDE OVERLOAD PROTECTION AND DISCONNECT MEANS AS REQUIRED.
- COMPLETE WIRING AS SHOWN ABOVE.
Fig. 2. Internal schematic and typical hookup for RA89A.
POWER SUPPLY. PROVIDE OVERLOAD PROTECTION
AND DISCONNECT MEANS AS REQUIRED
Fig. 3. Internal schematic and typical hookup for RA832A.
- POWER SUPPLY. PROVIDE OVERLOAD PROTECTION AND
- DISCONNECT MEANS AS REQUIRED.
- N.O. CONTACTS MAKE BEFORE N.C CONTACTS BREAK,
- AND N.C. CONTACTS MAKE BEFORE N.O. CONTACTS BREAK
Fig. 4. Internal schematic and typical hookup for R182J.
- AKES CONTACT ON TEMPERATURE FALL ONLY.
- MAKES CONTACT ON BOTH A TEMPERATURE RISE AND FALL
Fig. 5. Thermostat connections for R182J.
- POWER SUPPLY. PROVIDE OVERLOAD PROTECTION AND DISCONNECT MEANS AS REQUIRED.
- CONTROLLER (IF USED) MUST BE SNAP ACTION OR
- MERCURY SWITCH TYPE.
- N.O. CONTACTS MAKE BEFORE N.C CONTACTS BREAK, AND N.C. CONTACTS MAKE BEFORE N.O. CONTACTS BREAK
Fig. 6. Internal schematics and typical hookup for R482J.
- POWER SUPPLY. PROVIDE OVERLOAD PROTECTION AND DISCONNECT MEANS AS REQUIRED.
- IF CONTROLLING TWO LOADS, USE: 3 AND 4 FOR LINE VOLTAGE LOAD AND 6
- FOR LINE OR LOW VOLTAGE LOAD IF USING LOW VOLTAGE, USE A SEPARATE TRANSFORMER. M23784
Fig. 7.
- Schematic diagram showing YHR845A in multizone, forced hydronic heating system.
- This arrangement is suitable for any number of additional zones.
Fig. 8. YHR845A hookup for controlling two loads
- POWER SUPPLY. PROVIDE OVERLOAD PROTECTION AND DISCONNECT MEANS AS REQUIRED.
- WHEN CONTROLLING TWO LOADS, USE 3 AND 4 FOR LINE VOLTAGE LOAD AND 5 AND 6 FOR LINE OR LOW VOLTAGE LOAD.
- IF USING LOW VOLTAGE, USE A SEPARATE TRANSFORMER.
POWER SUPPLY. PROVIDE OVERLOAD PROTECTION AND DISCONNECT MEANS AS REQUIRED. WHEN CONTROLLING TWO LOADS, USE 3 AND 4 FOR LINE VOLTAGE LOAD AND 5 AND 6 FOR LINE OR LOW VOLTAGE LOAD. IF USING LOW VOLTAGE, USE A SEPARATE TRANSFORMER. Internal view of RA832A Switching Relay.
Fig. 10. Internal view of RA832A Switching Relay.
SERVICE AND CHECKOUT
- Never use oil on any part of the relay coil or contacts.
- Keep the cover on the relay during normal operation and remove only for service and checkout.
- Relay contacts require no cleaning; they are arranged so they close with a wiping action and are self-cleaning. The contacts may turn black after being in service for some time; this discoloration does not prevent proper operation.
- After installation is complete, operate system through at least one cycle from the controller to make certain the relay controls the equipment as intended.
Automation and Control Solutions
Honeywell International Inc. Honeywell Limited-Honeywell Limitée
1985 Douglas Drive North 35 Dynamic Drive
Golden Valley, MN 55422 Toronto, Ontario M1V 4Z9
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© 2006 Honeywell International Inc.
69-2041 M.S. 12-06
References
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