Lochinvar IFB1.3BTU-HR User Manual
INTELLI-FIN WATER HEATERS AND BOILERS WIRING DIAGRAMS
IFB-IFW-WRG-03
LADDER DIAGRAM
MODELS: IFB / IFW 1.3, 1.5 AND 2.0 BTU / HR
HOT
~
~
~
~
~
~
W
L
PR
POWER
SWITCH
M
PU
OM
C
UM
P
T
TES
W
S
~
~
~
~
~
~
O
C
E
B
O
HI-
C
PUMP POWER
120VAC 15AMP
P MOTOR
M
N
O
R
RELAY
P
T
T
H
TC
I
J1
PU
PU
ESET
R
LIMIT
IGNITION RELA
WARNING:
N
7
2
3
NO
OUND
R
G
O
R
G
9
8
7
6
5
4
3
2
1
CONTROLLER O UTPUTS
.
C
.
O
AC
V
24
LWCO
T
E
ES
R
J2
3
1
2
4
J
D
N
G
P
G
O
S
SSI
CHA
D
UN
RO
G
O
N
OM
C
R
Y
IP SWITCH # 5
D
O
u
t
O
u
t
P
w
r
+
C
o
m
V
ol
t
s
m
A
2
4V
S
I
G
S
I
G
Vol ts O ut
mA Out
Com
24V Pwr
SIG IN +
SIG IN -
PWM
CONV.
N
RU
FWD
88
88
REV
G
O
R
P
N
I
SWITCH
DIP
N
W
O
D
ON
TI
POSI
S
N
K
S
R
C
2
1L
L
To avoid possible shock hazard, disconnect power before servicing.
NO
VFD POWER
RELAY
LOW VOLT
TRANSFORMER
Y
ect
l
Se
ack
B
C
ALARM
CONTACTS
SILENCE SWITC
7
45
P
UM
P
1
1
23
NABLE
E
2
1
SI
H
12
U
P
IN
2
3
N
O
FLA
FAILUR
T
ON
C
OPTIONAL
ow
L
as
G
O
N
C
N
INDICATOR
9
8
6
3
2
VFD
ENABL
24VA
TS
1
FLO
ME
E
UNIT POWER 120VAC 15AMP
VFD
G
2
1
E
OLL
R
AGE
High
Gas
C
NO
RM
ALA
2
13
2
1
UTPUTS
O
E
C
W
GND
SI
H
R
LV1
C
N
H
3
L2
SURFACE
IG
120
VAC
C
24 VA
OMMUNICATION
C
CABLE #1
IGNITION
RESET
AIR
SWITCH
C
N
STD.
RM
ALA
24VAC OUT
BYPASS
VALV E
C
6
8
1
OUT
7
7
1
OUT
8
6
1
OUT
5
19
OUT
T
U
4
20
O
3
21
OUT
T
2
2
OU
2
3
UT
1
O
C
24
VA
COM
4
AC
2
25 24 2
V
6
HSI
2
DI-1
D
N
7
2
G
8
as Va
G
DI-2
3
-
Lo
DI
130292
Fla
3
DI-4 GND
L1
HOT
NITER
V2
L
O
N
C
TROLL
N
O
CONTROLLER
PWM
n/a
Dial
Fl
Fl
Igni
n/a
u
P
v
l
Wtr Flow
w
Fail
me
lo
B
Drain
C
CONT
I
H
12
/4-2
la
A
oat Close
oat Open
on Enable
i
t
p
m
Bypas
e
e
ur
c
NPU
N
I-LIM
r
Low
Relay
O
k
C
N
ER
0ma
m
utle
T1
T2
T3
d
e
O
N
C
N
OL
R
TS
C
R
24V
Air/Bloc
s
t Wa
t Water Sens
e
Inl
GAS VA
OPTIONAL
Louver
Provin
LER
1
OVER TEMP
NDICATO
I
OM
C
COM
R
RM
IT ALA
ELAY
C
A
Hi-LoG
Louv
Drain
k
Se
A
O
Sensor
r
Wate
Sensor
ter
COM
C
C
1
nsor
M
O
g Sw
N
NC
2
2
R
as/
e
or
S/S
D
LE
COMM
E
EAR
UND
O
C
VA
4
2
L
B
3
J
T
3
6
2
5
1
4
B
/
O
OM
C
COM
LAR
A
MANUA
L
OVER-
RIDE
A
DD
R
M
U
X
NOT
TOR
AC
F
CALIBRATED
NOT
DO
JUST.
AD
TS
OL
V
S
P
AM
RTZ
E
H
2
0
1
0
1
4
1
1
1
1T2
T
BU
T
N
C
Y
K
M
E
CE:
I
5
GROUND
IGNIT
MOD
AND DI
S
24
H
TRO
PU
N
R
EL
R
ON
BAS
M
O
D
E
T
M
I
E
Y
T3
L1
L2
S1
S2
A
V
LL
1
O
N
.
COM
I
ULE
E
C
E
2
FL
SWITCH
C
ST
O
AY
ON
BUS
24V
R
G
R
SPLA
A
INPUTS
3
OW
O
N
C
N
D.
A
C
S
NO
EXT. GA
NO
120VAC GAS VAL VE
REL
VE
L
R
O
5
4
3
4
3
5
S
K
U
3
J
AC
J
E-B
5
1
4
13
E-BUS
C
D
V
1
OUT
22
6
-
21
1
V/ma
A
r
1
1
5
0
1-
/ma
V
A
4
M
1A
OH
891
GND GND
M
7
H
A1-3
O
2
6
1A
OHM
5
GND
432
A1-1
OHM
1
E
GND
CHASSI
U
O
R
G
OPTIONAL
NT VALVE
VE
S
AY
4V
2
LOUVER RELAY
C
BYPASS
SENSO
1
2
1
ENABL
TCH
I
SW
B
G
S
ND
RUN/STOP
M
VE
AL
V
AC SOLE
1
1
N/A
0
1
TH
9
PI
8
LV2
7
ESET
R
V
L
6
5
MV
4
S
P
3
FF
2
M/S
1
FF
OM
3
2
1
R
SENSO
1
E
N
I
SENSOR
K
B
K
BLOWER
ASSEMBLY
NOID V
TION
NI
IG
MODULE
1
1
2
3
R
O
N
STD.
EA
R
OMMUNICATION
C
ONNEC
C
E
L
CAB
ONTROL
C
OMMUNICATION
C
CABLE CONNEC
UNICATION
M
OM
C
CABLE
NPUTS
I
1
1
2
3
4
5
YP
B
2
1
1
1
OA
R
1
2
2
1
1
LET
T
U
O
ET
L
SENSO
LET
N
I
H
SWITC
GROUND
ALV
CONTROLLE
CONT
R
T
PANEL
2
#
SS
A
A SENS OR
O
OPTIONAL
OUT
R
SEN
E
-
+
VFD
LOUVER
REL
AC
N
IO
TION
L
B
O
L
O
L
A
G
SEN
LET SEN
SOR
NEUTRAL
2
F
1
F
AY
TS
RA
D
K
R
I
A
UVER
HI/LO
S
SOR
SOR
R
N
I
LBL20021
A
EV
R
2 of 3
WIRING DIAGRAM
MODELS: IFB / IFW 1.3, 1.5 AND 2.0 BTU / HR
888
8
P
R
O
G
V
OL
T
S
A
MP
S
HE
RT
Z
RUN
F
W
D
RE
V
W
s
b
VFD
ENABLE
J3
5
1
41
3
1
214321
E
G
ND
GND
A1-
3
O
H
M
G
ND G
N
D
2
2VD
C
O
U
T
E
-
BUS
D
I
-
4
G
N
DDI
-
3
D
I
-
2
GND
2
OU
T
3
O
U
T
5
O
U
T
1
O
U
T
4
O
U
T
6
O
UT
7
O
U
T
E
-
B
U
S
J
A
C
K
A
1-
1
O
H
M
A
1-
2
O
H
M
A
1
-
4
O
H
M
A
1-
5
V/
m
a
A
1-
6
V/
m
a
D
I
-
1
24
VA
C
2
4
VA
C
C
O
M
8
O
U
T
LE
D
I
nlet Wa
te
r Sen
s
or
Bypass
Wa
te
r Se
n
sor
S/S
OA Se
n
s
or
LowAir
/Block Dra
in
Hi-LoG
a
s/
Louver
Outl
e
t W
a
te
r
Se
nsor
F
l
a
m
e
Fail
ure
L
o
w
W
tr Flow
Gas Va
l
v
e
H
SI
B
S
E
S
CHA
SSIS
GRO
UND
2
4VAC
H
SI
1
2
2
3
4
56
7
8
9
1
12
3
GY
GY
BL
65
789
1
0
11
31 30
29 2
826
2
7
25
24 2
3
2
2
21 20 19
18 17 1
6
Back Select
FL
S
W
H
I-LIMIT
NO
C
OM
NC
BL/
BK
CO
M
NC
Y
BL
NO
COM
NO
PU
HI-LIMI T ALARM
R
ELAY
ALARM
R
ELAY
COM
COM
NO
C
OM
PUM
P R
ELAY
120
VAC
CIRCUIT
BREAKER
OVER TEMP
INDICATOR
ALARM
C
O
NTAC
TS
ALARM
24
VAC
O
UT
A
L
AR
M
I
ND
ICATO
R
R
PU
PU
BL
BL
/
BK
B
L/BK
BL
PUMP MOTOR
M
M
O
D
E
T
I
M
E
BASE
M
U
X
A
DD
R
MANUA
L
OVER-
RIDE
SIG IN -
SIG IN +
24V Pwr
Com
mA Out
Volts Out
V
o
l
t
s
O
u
t
m
A
O
u
t
C
o
m
24V
P
w
r
S
I
G
+
S
I
G
-
PWM
CO
NV.
COMMAND DISPLAY
C
24 VAC
VFD POWER RELAY
NO
COM
G
W
BK
BK
G
W
P
NO
C
POWER SWITCH
N
Y
T
Y
EBUS
EBUS
EARTH
24VAC
24VAC
G
Y
BL
W
G
BK
BK
BK
W
BK/W
BK
BK/W
BK
B
K
B
K
B
L
T
P
U
O
G
Y
PU
Y
BL
PU
PU
B
L/W
Y
Y
BL/W
BL
/
W
O
O
B
L
BR
W
G
Y
PWM/4
-20m
a
Di
a
l
Al
a
rm
F
loa
t
Clos
e
Fl
oa
t
O
p
e
n
Ignition
Ena
b
le
n/
a
Pump R
e
la
y
n
/a
CONTROLLER
CHA
SSIS
G
ROUN
D
Y
W
SILENCE
W
BK
Y
BL
BL
LOW VOLTAGE
TRANSFORMER
BL/BK
120VAC
15AMP
120VAC
15AMP
TWO 15 AMP CIRCUITS
OR ONE 30 AMP CIRCUIT
UNIT POWER
P
UM
P
P
OWER
CHASSIS
GROUND
CHA
SSIS
G
ROUN
D
IGNI
TION RELAY
FLOAT OPEN
R
R
R
R
BYPASS COMMO
N
R
S
T
D
.
S
T
D
.
B
L
R
B
L/W
BL
BL
B
L
1
4
5
6
2
3
REAR WIR
I
N
G
CONN
E
CTION
S
3
2
1
3
2
1
4
5
LO
U
VERS
24VAC ALARM
OUT
BYPASS
VALVE
OP
TI
O
NAL
2
1
A
LARM
C
O
NTACTS
LOU
CO
N
T
PU
B
K
B
L
Y
O
PE
N
CO
MMO
N
CL
OSE
BR
T
CO
MM
CLO
S
OPEN
PU
PU
Y
BL/W
OA
SENSOR
G
INPUTS
1
1
D
IP SWITCH #5 ON
P
UMP
BL
BL
P
Y
1
2
3
NOTICE:
FACTO
R
Y
CALIBR
AT
ED .
DO
NOT
ADJ
U
ST.
SWITC
H
BR
BK
W
BL
GY
GY
3
2
7
A
L
AR
M
DR
IVE
CO
1
1
1
1
OUTPUTS
W
FLOAT CLOSE
W/BK
1
2
BK
BK
3
2
1
L
1L2T
1
T
2
T
3
S
N
K
S
R
C
LI
NE
N
E
UT
RAL
G
R
O
UN
D
0
1
0
2
1
4
1
1
B
K
W
G
G
N
D
D
I
P
S
WI
T
CH I
N
D
O
WN
P
O
SITI
O
N
T
3
T
2
T
1
1
5
Y
PK
P
G
Y
W
G
Y
T
OR
FAN
G
W
BK
J3
5
4
6
1
2
3
O.C.
J
1
J
2
3
2
1
J
4
P
R
ESE
T
R
ESET
CHA
S
S
I
S
G
R
O
U
N
D
O
G
N
D
PU
G
P
U
PU
24 VAC
TEST
SWITCH
LW
C
O
PR
O
B
E
T
~
~
~
~
~
~
~
~
~
~
~
~
C
O/
BK
BL
Y
T
T
P
Y
TO
1.
2K
R
ES
I
S
TO
R
TO
M
ANUA
L
O
’
R
I
D
E
SW
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