Honeywell R845A Switch User Manual


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5 60-2481—2
R182J, R482J, R845A, R847A, R882J, RA89A, RA832A
INSTALLATION
Fig. 5—Thermostat connections for R182J. Fig. 7—Schematic diagram showing R845A in
multizone, forced hydronic heating system.
This arrangement is suitable for any number
of additional zones.
Fig. 8—R845A hookup for controlling two
loads.
L1
HOT
L2
2
1
3
4
1
1
RA845A 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.
M3822
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 R845A
RELAYS FOR OTHER ZONES
HYDRONIC HEATING
CONTROL TERMINALS
2
3
5
6
L1
HOTL2
TT
21 34
1
1
TO
POWER
LOW VOLTAGE (CLASS 2)
2-WIRE THERMOSTAT
R845A
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
M3820
65
LOAD 1
TO
POWER
LOAD 2
1 1
2
3
3
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.
M8233A
JUMPER
Fig. 6—Internal schematic and typical hookup
for R482J.
1
2
3
3
3
1
2
R482J
N.O.
N.C.
N.C.
5
37
6
N.O.
421
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.
M8234
CONTROLLER
L1
(HOT)
L2
TO LOAD
TO LOAD
COM. COM.
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