Page 1
R182J, R482J, R845A, R847A, R882J,
RA89A, RA832A Switching Relays
Application
These relays can be used for a variety of switching applications to provide control of line- or low-voltage devices by a low
voltage controller. See Table 1.
TABLE 1—SWITCHING RELAY SPECIFICATIONS.
Models Application
R182J
R482J
R845A For hot water zone control
R847A
R882J For use with separate low
RA89A For switching one line
RA832A
For 24V thermostat
control of line voltage
devices.
Controlled by a line
voltage controller
systems or spst control of
two separate loads.
Provides switching for
high-current loads such as
cooling compressors.
voltage power source.
voltage load.
For switching two line
voltage loads with a
common power source.
Coil
Voltage Switch Control
(50/60 Hz) Action Circuit 50/60 Hz) (A)
120 Dpdt 3-wire 24 0.40
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
24 Dpdt 7.4 44.4
120 Spst 10.2 61.2
120 Dpst 7.4 44.4
240 3.7 22.2
Voltage
(Vac at
Relay Coil
Current
a
Contact
Ratings (A)
AFL ALR
7.4 44.4
a
IMPORTANT: The transformer on the R182 can over-
heat 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)
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
1 69-0790—3J.H. • Rev. 10-94 • ©Honeywell Inc. 1994 • Form Number 69-0790—3
Total Wire
Length
Feet Meters Feet Meters
Length of Run
to Thermostat
(Wires)
Page 2
Installation
WHEN INSTALLING THIS PRODUCT…
1. Read these instructions carefully. Failure to follow
instructions can 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. Make sure installer is a trained, experienced service
technician.
4. After completing installation, use these instructions
to check out product operation.
W ARNING
ELECTROCUTION HAZARD CAN
CAUSE PROPERTY DAMAGE, SEVERE
INJURY, OR DEATH.
Transformer core not bonded.
Disconnect power supply before wiring to pre-
vent 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 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 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 ap-
proved for use with copper wires only.
See Figs. 2 through 10 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. 11 is an internal view of the RA832A and
shows 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].
1
4 [108]
3
[2] DIAMETER
32
[13] DIAMETER
1
3 [89]
2
3
1 [35]
8
RA89A (SPST)
TO LOAD
4
KNOCKOUT FOR
1/2 (13) CONDUIT (3)
L2
CONTROLLER
(IF USED)
7
1
8
[48]
7
[22] DIAMETER
8
KEYHOLE TYPE
MOUNTING HOLE
1
4
2
[114]
1
5
4
[133]
3
[10]
8
3
[10]
8
15
2
16
[75]
7
1
8
[48]
M3823
2
21 34
1
RA89A
JUMPER REMOVED
L1
HOT
1
TO LOAD
5
1 [29]
32
1
2
7
[6] DIAMETER MOUNTING HOLE
32
25
[20]
32
Fig. 2—Internal schematic and typical hookup
for RA89A.
LOW VOLTAGE (CLASS 2)
2-WIRE THERMOSTAT
TT
JUMPER
21 34
L2
L1
1
HOT
POWER SUPPLY. PROVIDE OVERLOAD PROTECTION
1
AND DISCONNECT MEANS AS REQUIRED.
COMPLETE WIRING AS SHOWN ABOVE.
2
M3819
69-0790—32
Page 3
Fig. 3—Internal schematic and typical hookup
for RA832A.
LOW VOLTAGE (CLASS 2)
2-WIRE THERMOSTAT
TT
XX
AUXILIARY TO LOW
OR MILLIVOLTAGE
(POWERPILE) LOAD
RA832A
Fig. 6—Internal schematic and typical hookup
for R482J.
R482J
21 34
L2
L1
1
HOT
POWER SUPPLY. PROVIDE OVERLOAD PROTECTION
1
AND DISCONNECT MEANS AS REQUIRED.
Fig. 4—Internal schematic and typical hookup
for R182J.
WX RB
3
OHMS
L1
L2
1
L1
L2
(HOT)
POWER SUPPLY. PROVIDE OVERLOAD PROTECTION AND
1
DISCONNECT MEANS AS REQUIRED.
N.O. CONTACTS MAKE BEFORE N.C CONTACTS BREAK,
2
AND N.C. CONTACTS MAKE BEFORE N.O. CONTACTS BREAK.
LOAD 1
K1
LOAD 2
(OPTIONAL)
K1
4
LOAD
N.O.
R182J
K1
K2
37
LOAD
N.C.
N.O.
M3821
2
K2
6
N.C.
M8232
Fig. 5—Thermostat connections for R182J.
THREE-WIRE
LOW VOLTAGE
(SERIES 10)
THERMOSTAT
RRB
W
1
THREE-WIRE
LOW VOLTAGE
(SERIES 20)
THERMOSTAT
W
RB
2
TWO-WIRE
LOW VOLTAGE
(SERIES 80)
THERMOSTAT
3
5
421
37
CONTROLLER
HYDRONIC HEATING
CONTROL TERMINALS
2
1
L1
(HOT)
L2
POWER SUPPLY. PROVIDE OVERLOAD PROTECTION
1
AND DISCONNECT MEANS AS REQUIRED.
CONTROLLER (IF USED) MUST BE SNAP ACTION OR
2
MERCURY SWITCH TYPE.
N.O. CONTACTS MAKE BEFORE N.C CONTACTS BREAK,
3
AND N.C. CONTACTS MAKE BEFORE N.O. CONTACTS BREAK.
Fig. 7—Schematic diagram showing R845A in
multizone, forced hydronic heating system.
This arrangement is suitable for any number
of additional zones.
T
THERMOSTAT
THERM.
ZONE 1
T
ZC
ZP
B1
BURNER
BURNER
CONTROL
B2
C1
CIRC.
CIRCULATOR
ZONE 1
C2
1
LINE
2
N.O.
TO LOAD
TO ADDITIONAL R845A
RELAYS FOR OTHER ZONES
8
N.O.
N.C.
COM. COM.
RA845A RELAY
2
1
4
3
5
6
L1
2
HOT
1
3
L2
N.C.
TO LOAD
THERMOSTAT
ZONE 2
CIRCULATOR
ZONE 2
3
6
M8234
W
MAKES CONTACT ON TEMPERATURE FALL ONLY.
1
MAKES CONTACT ON BOTH A TEMPERATURE RISE AND FALL.
2
BX
R182J
R
W
BX
R182J
JUMPER
W
R182J
M8233A
POWER SUPPLY. PROVIDE OVERLOAD PROTECTION
1
AND DISCONNECT MEANS AS REQUIRED.
2
R
BX
IF CONTROLLING TWO LOADS, USE:
3 AND 4 FOR LINE VOLTAGE LOAD
5 AND 6 FOR LINE OR LOW VOLTAGE LOAD
3
IF USING LOW VOLTAGE, USE A SEPARATE TRANSFORMER.
3 69-0790—3
M3822
Page 4
Fig. 8—R845A hookup for controlling two
loads.
LOW VOLTAGE (CLASS 2)
2-WIRE THERMOSTAT
TT
R845A
Fig. 10—Internal schematic and hookup for
R882J.
LOW VOLTAGE
SOURCE
2
CONTROLLER
R882J
1
21 34
1
TO
L1
POWER
HOTL2
POWER SUPPLY. PROVIDE OVERLOAD PROTECTION
1
AND DISCONNECT MEANS AS REQUIRED.
WHEN CONTROLLING TWO LOADS, USE 3 AND 4
2
FOR LINE VOLTAGE LOAD AND 5 AND 6 FOR LINE
OR LOW VOLTAGE LOAD.
IF USING LOW VOLTAGE, USE A SEPARATE
3
TRANSFORMER.
Fig. 9—Internal schematic and hookup for
R847A.
LOW VOLTAGE (CLASS 2)
2-WIRE THERMOSTAT
TT
L2 L1 34
1
TO
L1
L2
POWER
(HOT)
POWER SUPPLY. PROVIDE OVERLOAD PROTECTION
1
AND DISCONNECT MEANS AS REQUIRED.
WHEN CONTROLLING TWO LOADS, USE 3 AND 4
2
FOR LINE VOLTAGE LOAD AND 5 AND 6 FOR LINE
OR LOW VOLTAGE LOAD.
IF USING LOW VOLTAGE, USE A SEPARATE
3
TRANSFORMER.
4
10 AMP CONTACT RATING OR 20 AMP WHEN POLES
ARE CONNECTED IN PARALLEL.
2
1 1
LOAD 1
2
1 1
LOAD 1
TO
POWER
TO
POWER
3
44
3
65
LOAD 2
M3820
R847A
67
LOAD 2
M8231B
3
5
4
37
N.O.
N.C.
COM. COM.
LOAD
Fig. 11—Internal view of RA832A Switching
Relay.
TTX
X
24V TRANSFORMER
12
34
N.O.
3
6
8
N.C.
LOAD
M8235
RELAY
M3824
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.
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.
3. Relay contacts require no cleaning; they are arranged
so they close with a wiping action and are self-cleaning. The
Home and Building Control Home and Building Control
Honeywell Inc. Honeywell Limited—Honeywell Limitée
1985 Douglas Drive North 740 Ellesmere Road
Golden Valley, MN 55422 Scarborough, Ontario
69-0790—34
Printed in U.S.A.
M1P 2V9
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