INSTALLATION INSTRUCTIONS
69-2041
R182J, R482J, YHR845A,R847A, RA89A,
RA832A 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.
a
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 neces-
sary, measure the resistance or add a 100 ohm,
10 watt resistor across terminals W and R.
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
0.40
a
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
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
R182J, R482J, YHR845A,R847A, RA89A, RA832A SWITCHING RELAYS
69-2041 2
INSTALLATION
When Installing this Product
1. Read these instructions carefully. Failure to follow
instructions can damage product or cause a haz-
ardous 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, plaster-
board, 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.
Fig. 1. Approximate mounting dimensions in in. (mm).
Fig. 2. Internal schematic and typical hookup for
RA89A.
4
(114)
1
2
1
(48)
7
8
3
8
(10)
3
8
(10)
5
32
1 (29)
1
4
4 (108)
1
2
3 (89)
5
(133)
1
4
3
32
(2) DIAMETER
1
2
(13) DIAMETER
KEYHOLE TYPE
MOUNTING HOLE
7
8
(22) DIAMETER
7
32
(6) DIAMETER MOUNTING HOLE
1
(48)
7
8
25
32
(20)
KNOCKOUT FOR
1/2 (13) CONDUIT (3)
3
8
1 (35)
M3823B
2
(75)
15
16
L1
HOT
L2
TT
21 34
1
1
TO LOAD
LOW VOLTAGE (CLASS 2)
2-WIRE THERMOSTAT
RA89A (SPST)
JUMPER
L1
HOT
L2
21 34
1
TO LOAD
RA89A
JUMPER REMOVED
2
CONTROLLER
(IF USED)
1
POWER SUPPLY. PROVIDE OVERLOAD PROTECTION
AND DISCONNECT MEANS AS REQUIRED.
COMPLETE WIRING AS SHOWN ABOVE.
2
M3819A
R182J, R482J, YHR845A,R847A, RA89A, RA832A SWITCHING RELAYS
3 69-2041
Fig. 3. Internal schematic and typical hookup for
RA832A.
Fig. 4. Internal schematic and typical hookup for
R182J.
Fig. 5. Thermostat connections for R182J.
Fig. 6. Internal schematics and typical hookup for
R482J.
Fig. 7. Schematic diagram showing YHR845A in
multizone, forced hydronic heating system. This
arrangement is suitable for any number of additional
zones.
L1
HOT
L2
TT
21 34
1
1
LOAD 2
(OPTIONAL)
LOW VOLTAGE (CLASS 2)
2-WIRE THERMOSTAT
RA832A
POWER SUPPLY. PROVIDE OVERLOAD PROTECTION
AND DISCONNECT MEANS AS REQUIRED.
M3821A
LOAD 1
XX
AUXILIARY TO LOW
OR MILLIVOLTAGE
(POWERPILE) LOAD
L1
(HOT)
L2
1
2
1
2
N.O.
N.C.
N.O.
N.C.
WX RB
L1
L2
4
37
6
R182J
K1
K1
K1
K2
K2
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.
M8232A
LOAD
LOAD
3
OHMS
W
W
R
R
B
W
RB
BX
R182J
W
R
BX
R182J
W
R
BX
R182J
THREE-WIRE
LOW VOLTAGE
(SERIES 10)
THERMOSTAT
THREE-WIRE
LOW VOLTAGE
(SERIES 20)
THERMOSTAT
TWO-WIRE
LOW VOLTAGE
(SERIES 80)
THERMOSTAT
1
2
1
2
MAKES CONTACT ON TEMPERATURE FALL ONLY.
MAKES CONTACT ON BOTH A TEMPERATURE RISE AND FALL.
M8233B
JUMPER
1
2
3
3
3
1
2
R482J
N.O.
N.C.
N.C.
5
37
6
N.O.
4
21
8
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.
M8234A
CONTROLLER
L1
(HOT)
L2
TO LOAD
TO LOAD
COM. COM.
L1
HOT
L2
2
1
3
4
1
1
YHRA845A RELAY
POWER SUPPLY. PROVIDE OVERLOAD PROTECTION
AND DISCONNECT MEANS AS REQUIRED.
IF CONTROLLING TWO LOADS, USE:
3 AND 4 FOR LINE VOLTAGE LOAD
5 AND 6 FOR LINE OR LOW VOLTAGE LOAD
IF USING LOW VOLTAGE, USE A SEPARATE TRANSFORMER.
M23784
T
T
THERMOSTAT
ZONE 1
ZC
ZP
B1
B2
C1
C2
1
2
BURNER
CIRC.
LINE
THERM.
BURNER
CONTROL
CIRCULATOR
ZONE 1
2
3
THERMOSTAT
ZONE 2
CIRCULATOR
ZONE 2
TO ADDITIONAL YHR845A
RELAYS FOR OTHER ZONES
HYDRONIC HEATING
CONTROL TERMINALS
2
3
5
6
R182J, R482J, YHR845A,R847A, RA89A, RA832A SWITCHING RELAYS
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
Fig. 8. YHR845A hookup for controlling two loads.
Fig. 9. Internal schematics and hookup for R847A.
Fig. 10. Internal view of RA832A Switching Relay.
SERVICE AND CHECKOUT
1. Never use oil on any part of the relay coil or con-
tacts.
2. Keep the cover on the relay during normal opera-
tion 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.
L1
HOT
L2
TT
21
3
4
1
1
TO
POWER
LOW VOLTAGE (CLASS 2)
2-WIRE THERMOSTAT
YHR845A
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.
2
M23783
65
LOAD 1
TO
POWER
LOAD 2
1 1
2
3
3
L1
(HOT)
L2
TT
L2 L1 34
1
1
TO
POWER
LOW VOLTAGE (CLASS 2)
2-WIRE THERMOSTAT
R847A
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.
2
M8231B
67
LOAD 1
TO
POWER
LOAD 2
1 1
2
3
3
M3824A
24V TRANSFORMER
RELAY
12
34
T
T
X
X
-
1
-
2
-
3
-
4
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