•••••
Shock hazard. Disconnect power source
before servicing. Serious injury or death
could result.
EWF Wiring
Standard Wiring – EWF to LWCO with same voltages, see
Figure 5.
1.
Verify that the supply and burner circuit voltages con-
nected to the LWCO are the same as the EWF
2.
Verify that factory-installed jumpers connecting the hot
lead on the LWCO to the burner source are installed.
3.
Connect the hot lead wire from the power source to
terminal H on the EWF.
4.
Connect the neutral lead wire from the power source to
terminal N on the EWF.
5. Connect the NO/water feeder/alarm terminal on the
LWCO to terminal LW on the EWF.
Wiring EWF to LWCO with different burner circuit voltages,
see Figure 6a & b.
1.
Verify that the burner circuit voltages connected to the
LWCO are the same as the EWF
2.
Verify that factory-installed jumpers connecting the hot
lead on the LWCO to the burner source are removed.
3.
Connect the hot lead wire from the burner power source
to terminal H on the EWF.
4.
Connect the neutral lead wire from the burner power
source to terminal N on the EWF.
5.
Connect the NO/water feeder/alarm terminal on the
LWCO to terminal LW on the EWF.
N C
C O M
N O
H
N
T a c o L T x 1 2 0 x / L T x 0 2 4 x
G N D
P
B U R N E R
C I R C U I T
H O T
N E U T R A L
H
N
T a c o E W F 1 2 0 / E W F 0 2 4
L W
1 2 0 V A C / 2 4 V A C
C I R C U I T
FIG. 5
FIG. 6
(b)
(4)
(a)
N C
CO M
N O
H
N
T a c o L T x 1 2 0 x
G N D
P
B UR NE R
CI RC UI T
1 2 0 V A C
C I R C U I T
HO T
NE U TR AL
H
N
T a c o E W F 0 2 4
L W
2 4 V AC
C I R C U I T
HO T
NE U TR AL
N C
CO M
N O
H
N
T a c o L T x 0 2 4 x
G N D
P
B UR NE R
CI RC UI T
1 2 0 V A C
C I R C U I T
HO T
NE U TR AL
H
N
T a c o E W F 1 2 0
L W
2 4 V AC
C I R C U I T
HO T
NE U TR AL
*
*
* N O T E :
R e m o v e fa c to ry in s ta lle d
ju m p e r b etw e e n H a n d C O M te rm in a ls
EWF Standard Wiring
EWF Alternate Wiring
FIG. 7
(a)
(b)
N C
CO M
N O
H
N
G N D
P
B UR NE R
C IRC U IT
H O T
N EU TR AL
H
N
L W
1 2 0 V A C
C IR C U IT
N
H
C
W
B
M c D o n n e ll & M ill e r
P S -8 0 1 /8 5 1 -1 2 0
w /R e d & G r e e n L E D s
1
2
3
4
5
M c D o n n e ll & M ill e r
P S -8 0 1 /8 5 1 -1 2 0 w / R e d &
A m b e r L E D s , S e rie s 7 5 0
2
1
P 1
P 2
A
H yd ro le v e l
4 5 0 , 5 5 0 , 6 5 0 , & 7 5 0
T a c o L T x 1 2 0 x
T a c o E W F 1 2 0
In s ta lle d
J u m pe r **
T a c o L T x 0 2 4 x
T a c o E W F 0 2 4
N C
CO M
N O
H
N
G N D
P
B UR NE R
C IRC U IT
H O T
N EU TR AL
H
N
L W
2 4 V A C
C IR C U IT
2
1
P 1
P 2
A
H yd ro le v e l
4 0 0 , 5 0 0 , 6 0 0 , & 7 0 0
N
H
C
W
B
M c D o n n e l l & M il le r
P S -8 0 2 /8 5 2 -2 4
In s ta lle d
J u m pe r **
Wiring the EWF to Various LWCO's
F a c to ry
In s t alle d
J u m p e r
N O T E :
W iring sho wn on ly fo r con tro l
an d b urn er circuits of the sam e
vo lta ge. Som e term ina l de sign ations
are n ot in their actu al ord er o n the
LW C O s.
** M a y be fa ctory in stalled on
som e L W C O s
