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WIRING
CAUTION
Electrical Shock or Personal Injury Hazard.
Power supply can shock.
Use only NEC Class 1 wire for all line voltage
wiring connections. Class 1 wires must be rated for
at least 167°F (75°C).
All wiring must comply with all applicable electrical codes,
ordinances, and regulations. Follow all instructions
furnished with the controlled equipment.
IMPORTANT
The switching relay terminals are approved only
for use with copper wires.
When two or more line-voltage load devices are to be
controlled in parallel, the total current must not exceed the
rating for the relay load. Never connect load terminals to a
load that uses more current than the amount listed in the
electrical ratings on the relay. See Table 2 for wiring length
specifications. See the schematic and typical hookups in
Fig. 2 through 7.
RA889A
RELAY
L1
(HOT)
1
L2
G
L2
L1
2
C1
C2
L7148A/L8148A
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
1
2
CONTROL CASE MUST BE CONNECTED TO EARTH GROUND. USE GROUNDING SCREW PROVIDED.
3
B1 IS 1/4 IN. TAB TERMINAL.
Fig. 3. RA889A hookup for L7148A/L8148A in an oil-fired, tankless hot water, zoned, pump system.
T87F
R(T)
W(T)
L1
L2
COM
N.O.
X1
X2
PUMP
T
T
3
C554
B2
B1
Table 2. Wire Lengths.
Wire
Total Wire Length
Size
(AWG)
Ft
22
120
20
200
18
300
16
500
14
800
LOW VOLTAGE (CLASS 2)
2-WIRE THERMOSTAT
AUTOMOTIVE
FUSE
R(T)
W(T)
RELAY
LED
G
L2
L1
1
L1
L2
HOT
POWER SUPPLY. PROVIDE OVERLOAD PROTECTION
1
AND DISCONNECT MEANS AS REQUIRED.
Fig. 2. RA889A internal schematic
and typical hookup.
T87F
RA889A
R(T)
W(T)
L1
L2
COM
N.O.
X1
X2
PUMP
F
F
T
T
R8184G
3
RA889A SWITCHING RELAY
Wire Length of Run
to Thermostat
M
Ft
38.0
60
61.0
100
91.5
150
152.5
250
244.0
400
C
COM
N.O.
N.C.
1
TO
TO
POWER
LOAD 1
POWER
T87F
RA889A
R(T)
W(T)
L1
L2
COM
N.O.
X1
PUMP
ORANGE
WHITE
BLACK
BURNER
AND
IGNITION
M
18.0
30.5
45.5
76.0
122.0
X1
X2
LOW-VOLTAGE
POWERPILE®
M14295
X2
M14301
69-1293—1
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