Page 1
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 line- or low-voltage
devices by a low voltage controller. See Table 1.
Models Application
R182J For 24V thermostat control of
R482J Controlled by a line voltage
YHR845A For hot water zone control
R847A Provides switching for high-
RA89A For switching one line
RA832A For switching two line load
a
IMPORTANT:
line voltage devices.
controller.
systems or spst control of
two separate loads.
current loads such as cooling
compressors.
voltage load.
voltage loads with a common
power source.
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 1. Switching Relay Specifications.
Coil
Wire
Size
Vol tag e
(Vac at
50/60 Hz)
Table 2. Length of Wire.
Relay Coil
Current (A)
a
0.40
Tot al W ire
Length
Feet Meters Feet Meters
Length of Run to
Thermostat
Vol tag e
(50/60 Hz)
120 Dpdt 3-wire 24
240 3.7 22.2
120 2-wire 120 0.08 7.4 44.4
208/240 208/240 0.04 3.7 22.2
120 Dpst 24 0.40 7.4 44.4
120 22 100
240 10 50
120 Spst 10.2 61.2
120 Dpst 7.4 44.4
240 3.7 22.2
Switch
Control
Action
Circuit
AWG
(Number)
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
Contact
Ratings (A)
AFL ALR
7.4 44.4
(Wires)
69-2041
Page 2
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.
1
4 (108)
3
(2) DIAMETER
32
(13) DIAMETER
1
3 (89)
2
3
1 (35)
8
4
7
1
8
(48)
7
(22) DIAMETER
8
KEYHOLE TYPE
MOUNTING HOLE
3
(10)
8
2
(75)
7
1
8
(48)
KNOCKOUT FOR
1/2 (13) CONDUIT (3)
4
(114)
15
16
1
2
1
5
4
(133)
3
(10)
8
M3823B
5
1 (29)
32
1
2
7
(6) DIAMETER MOUNTING HOLE
32
25
(20)
32
Fig. 1. Approximate mounting dimensions in in. (mm).
LOW VOLTAGE (CLASS 2)
2-WIRE THERMOSTAT
RA89A (SPST)
TT
JUMPER
21 34
L2
1
2
TO LOAD
L1
1
HOT
POWER SUPPLY. PROVIDE OVERLOAD PROTECTION
AND DISCONNECT MEANS AS REQUIRED.
COMPLETE WIRING AS SHOWN ABOVE.
Fig. 2. Internal schematic and typical hookup for
2
21 34
L2
1
CONTROLLER
(IF USED)
RA89A.
RA89A
JUMPER REMOVED
L1
HOT
1
TO LOAD
M3819A
69-2041 2
Page 3
R182J, R482J, YHR845A,R847A, RA89A, RA832A SWITCHING RELAYS
LOW VOLTAGE (CLASS 2)
2-WIRE THERMOSTAT
TT
21 34
L2
1
Fig. 3. Internal schematic and typical hookup for
WX RB
L1
L1
(HOT)
POWER SUPPLY. PROVIDE OVERLOAD PROTECTION AND
1
DISCONNECT MEANS AS REQUIRED.
2
N.O. CONTACTS MAKE BEFORE N.C CONTACTS BREAK,
AND N.C. CONTACTS MAKE BEFORE N.O. CONTACTS BREAK.
XX
LOAD 1
L1
1
HOT
POWER SUPPLY. PROVIDE OVERLOAD PROTECTION
AND DISCONNECT MEANS AS REQUIRED.
RA832A.
3
K1
OHMS
L2
1
L2
Fig. 4. Internal schematic and typical hookup for
THREE-WIRE
LOW VOLTAGE
(SERIES 10)
THERMOSTAT
RRB
W
W
R182J
MAKES CONTACT ON TEMPERATURE FALL ONLY.
1
MAKES CONTACT ON BOTH A TEMPERATURE RISE AND FALL.
2
1
BX
THREE-WIRE
LOW VOLTAGE
(SERIES 20)
THERMOSTAT
W
LOAD 2
(OPTIONAL)
4
N.O.
R182J.
W
AUXILIARY TO LOW
OR MILLIVOLTAGE
(POWERPILE) LOAD
RA832A
K1
37
LOAD
N.C.
2
RB
R
BX
R182J
JUMPER
M3821A
R182J
K1
K2
K2
LOAD
N.O.
TWO-WIRE
LOW VOLTAGE
(SERIES 80)
THERMOSTAT
W
R182J
2
6
N.C.
M8232A
R
M8233B
Fig. 5. Thermostat connections for R182J.
R482J
3
5
4
CONTROLLER
2
1
L1
(HOT)
L2
POWER SUPPLY. PROVIDE OVERLOAD PROTECTION
1
AND DISCONNECT MEANS AS REQUIRED.
2
CONTROLLER (IF USED) MUST BE SNAP ACTION OR
MERCURY SWITCH TYPE.
3
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
HYDRONIC HEATING
CONTROL TERMINALS
T
THERMOSTAT
THERM.
ZONE 1
T
ZC
ZP
B1
BURNER
BURNER
CONTROL
B2
C1
CIRC.
CIRCULATOR
ZONE 1
C2
1
LINE
2
POWER SUPPLY. PROVIDE OVERLOAD PROTECTION
1
AND DISCONNECT MEANS AS REQUIRED.
2
IF CONTROLLING TWO LOADS, USE:
3 AND 4 FOR LINE VOLTAGE LOAD
5 AND 6 FOR LINE OR LOW VOLTAGE LOAD
3
BX
IF USING LOW VOLTAGE, USE A SEPARATE TRANSFORMER.
Fig. 7. Schematic diagram showing YHR845A in
multizone, forced hydronic heating system. This
arrangement is suitable for any number of additional
21
N.O.
N.C.
COM. COM.
TO LOAD
R482J.
TO ADDITIONAL YHR845A
RELAYS FOR OTHER ZONES
YHRA845A RELAY
2
1
4
3
5
6
1
zones.
3
8
N.O.
TO LOAD
THERMOSTAT
ZONE 2
CIRCULATOR
ZONE 2
2
3
6
N.C.
M8234A
M23784
37
L1
HOT
L2
3 69-2041
Page 4
R182J, R482J, YHR845A,R847A, RA89A, RA832A SWITCHING RELAYS
LOW VOLTAGE (CLASS 2)
2-WIRE THERMOSTAT
TT
YHR845A
T
T
X
X
RELAY
21
L2
POWER SUPPLY. PROVIDE OVERLOAD PROTECTION
1
AND DISCONNECT MEANS AS REQUIRED.
2
WHEN CONTROLLING TWO LOADS, USE 3 AND 4
FOR LINE VOLTAGE LOAD AND 5 AND 6 FOR LINE
OR LOW VOLTAGE LOAD.
3
IF USING LOW VOLTAGE, USE A SEPARATE
TRANSFORMER.
4
3
1
L1
HOT
1 1
TO
POWER
LOAD 1
2
TO
POWER
65
3
LOAD 2
M23783
Fig. 8. YHR845A hookup for controlling two loads.
LOW VOLTAGE (CLASS 2)
2-WIRE THERMOSTAT
2
TO
POWER
R847A
67
3
LOAD 2
M8231B
TT
L2 L1 34
1
L1
L2
(HOT)
POWER SUPPLY. PROVIDE OVERLOAD PROTECTION
1
AND DISCONNECT MEANS AS REQUIRED.
2
WHEN CONTROLLING TWO LOADS, USE 3 AND 4
FOR LINE VOLTAGE LOAD AND 5 AND 6 FOR LINE
OR LOW VOLTAGE LOAD.
3
IF USING LOW VOLTAGE, USE A SEPARATE
TRANSFORMER.
1 1
TO
LOAD 1
POWER
24V TRANSFORMER
12
34
M3824A
Fig. 10. Internal view of RA832A Switching Relay.
SERVICE AND CHECKOUT
1. Never use oil on any part of the relay coil or contacts.
2. Keep the cover on the relay during normal operation and remove only for service and checkout.
3. 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.
4. After installation is complete, operate system
through at least one cycle from the controller to
make certain the relay controls the equipment as
intended.
Fig. 9. Internal schematics and hookup for R847A.
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
customer.honeywell.com
® U.S. Registered Trademark
© 2006 Honeywell International Inc.
69-2041 M.S. 12-06
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