Ra889a switching relay – Honeywell RA889A User Manual
Page 5
RA889A SWITCHING RELAY
5
68-0216—2
Fig. 3. RA889A hookup for L7148A/L8148A in an oil-fired, tankless hot water, zoned, pump system.
Fig. 4. RA889A hookup for L7148F/L8148E in a gas-fired, 24V, zoned, pump system.
G
L2
L1
T
T
C1
C2
B2
B1
F
F
T
T
L1
(HOT)
L2
PUMP
PUMP
PUMP
T87F
T87F
T87F
RA889A
RELAY
RA889A
RA889A
C554
R8184G
BURNER
AND
IGNITION
ORANGE
WHITE
BLACK
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
CONTROL CASE MUST BE CONNECTED TO EARTH GROUND. USE GROUNDING SCREW PROVIDED.
B1 IS 1/4 IN. TAB TERMINAL.
1
2
L7148A/L8148A
2
1
M14301
3
3
X2
X1
N.O.
COM
L2
L1
W(T)
R(T)
X2
X1
N.O.
COM
L2
L1
W(T)
R(T)
X2
X1
N.O.
COM
L2
L1
W(T)
R(T)
R(T)
W(T)
R(T)
W(T)
R(T)
W(T)
L1
L2
COM
N.O.
X1
X2
G
L2
L1
T
T
C1
C2
B2
B1
L1
(HOT)
L2
PUMP
PUMP
PUMP
T87F
T87F
T87F
RA889A RELAY
RA889A
RA889A
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
CONTROL CASE MUST BE CONNECTED TO EARTH GROUND.
USE GROUNDING SCREW PROVIDED.
B1 IS 1/4 IN. TAB TERMINAL.
1
2
3
3
L7148F/L8148E
2
1
M13314
LOW VOLTAGE
GAS VALVE
(eg, VR8300)
TR
TH
THTR
L1
L2
COM
N.O.
X1
X2
L1
L2
COM
N.O.
X1
X2