R8845U UNIVERSAL SWITCHING RELAY
5
68-0215—02
Fig. 5. R8845U hookup for L7148A/L8148A in an oil-fired, tankless hot water, zoned, pump system.
Fig. 6. R8845U 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
P
M
U
P
P
M
U
P
P
M
U
P
F
7
8
T
F
7
8
T
F
7
8
T
R8845U
RELAY
U
5
4
8
8
R
U
5
4
8
8
R
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
M14300
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)
G
L2
L1
T
T
C1
C2
B2
B1
L1
(HOT)
L2
P
M
U
P
P
M
U
P
P
M
U
P
F
7
8
T
F
7
8
T
F
7
8
T
R8845U RELAY
U
5
4
8
8
R
U
5
4
8
8
R
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
M13318
LOW VOLTAGE
GAS VALVE
(eg, VR8300)
TR
TH
THTR
R(T)
W(T)
R(T)
W(T)
R(T)
W(T)
L1
L2
COM
N.O.
X1
X2
L1
L2
COM
N.O.
X1
X2
L1
L2
COM
N.O.
X1
X2
