Honeywell RA89A, R847A, R845A, R182J, RA832A User Manual
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TRADELINE
®
R182J, R482J, R845A,
R847A, RA89A, RA832A
Switching Relays
Application
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
R182J
R482J
R845A For hot water zone control
R847A
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 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
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 69-0791—3J.H. • Rev. 10-94 • ©Honeywell Inc. 1994 • Form Number 69-0791—3
Total Wire
Length
Feet Meters Feet Meters
Length of Run
to Thermostat
(Wires)
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 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 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. 11 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].
1
4 [108]
5
1 [29]
32
1
2
7
[6] DIAMETER MOUNTING HOLE
32
25
[20]
32
Fig. 2—Internal schematic and typical hookup
for RA89A.
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
4
3
[2] DIAMETER
32
[13] DIAMETER
1
3 [89]
2
3
1 [35]
8
LOW VOLTAGE (CLASS 2)
2-WIRE THERMOSTAT
RA89A (SPST)
TO LOAD
7
1
8
[48]
7
[22] DIAMETER
8
KEYHOLE TYPE
MOUNTING HOLE
1
4
2
[114]
3
[10]
8
3
8
15
2
16
[75]
7
1
8
[48]
KNOCKOUT FOR
1/2 (13) CONDUIT (3)
2
JUMPER REMOVED
21 34
L1
L2
1
HOT
CONTROLLER
(IF USED)
5
[133]
[10]
M3823
RA89A
1
1
4
TO LOAD
M3819
69-0791—32
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