Honeywell R845A Switch User Manual


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69-0791—34
QUALITY IS KEY
Home and Building Control Home and Building Control Helping You Control Your World
Honeywell Inc. Honeywell Limited—Honeywell Limitée
1985 Douglas Drive North 740 Ellesmere Road
Golden Valley, MN 55422 Scarborough, Ontario
M1P 2V9
Printed in U.S.A.
Fig. 8—R845A hookup for controlling two loads.
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
Fig. 9—Internal schematics and hookup for
R847A.
Fig. 10—Internal view of RA832A Switching
Relay.
M3824
24V TRANSFORMER
RELAY
12
34
T
T
X
X
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.
10 AMP CONTACT RATING OR 20 AMP WHEN POLES
ARE CONNECTED IN PARALLEL.
2
M8231B
67
LOAD 1
TO
POWER
LOAD 2
1 1
2
3
44
3
4
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.
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