Lochinvar 000 - 500 - Manual (Page 65)

65
Installation & Service Manual
10
Diagrams
(continued)
Schematic Diagram - M9 Unit
315,000 - 399,999 Btu/hr Models
BOX DEPICTS
OPTIONAL ITEMS
120V
LINE
120
NEUTRAL GROUND
24VDC RELAY
CIRCULATION
PUMP
MOT
120V
TRANSFORMER
24V
CN1-1 OPERATOR CN1-2
1 LOW WATER 2
CUTOFF
5 VENT DAMPER 3 R W THERMOSTAT
LOW WATER
CUTOFF
3 4
ROLLOUT
SWITCH
MANUAL RESET
HIGH LIMIT
SPILL
SWITCH
24VAC RELAY
R
X B CN1-4
OPERATOR
CN1-3
FLOW
SWITCH
VENT DAMPER
4 1 1
IGNITION
MODULE
24V
PV
MV
GAS VALVE
PV
MV
MV/
PILOT
LOW
HIGH
OPERATOR
CN2-1 CN2-2
PV
MV/
PV
IGNITION
MODULE
24V
GND
BURNER
GND
2
LOUVER RELAY
R
PILOT
SPARK
T CN3
CN4 INLET SENSOR
CN5
CN6
SYSTEM SENSOR
R
24VDC RELAY
CN7
CN8
T
TIMER
TD
ARMING RELAY
R
OFF RELAY
R
OFF RELAY ARMING RELAY
FAILURE CONTACTS
6 7
1 2 3 4 5
CONTACTS ON ANY FAILURE
1 C
C NO
315&360 ONLY
315&360 ONLY
W
W
BK PK BK
BK
BK W
BL Y
Y
Y
BL
BL
Y
Y
R
W
BL
W
PR PR PR
PR
PR
T
PR
PR
GY
GY
BL
R R
W
G
Y
O
R
BK
BK
BL
BL
OR
OR
T OR
W
BL
R Y
PR Y
Y
BL
G
BK=BLACK
BL=BLUE
BN-BROWN
G=GREEN
GY=GRAY
OR=ORANGE
PK=PINK
PR=PURPLE
R=RED
T-TAN
W=WHITE
Y=YELLOW
R BK
PR
PR
LBL2
01
60
REV A
AUTO-RESET
HIGH LIMIT
HIGH FIRE
W2
R2
3
2
Y
BK
GY
V P
VENTER
PROVING
R
VENTER RELAY
Wiring Diagram - M9 Unit
315,000 - 399,999 Btu/hr Models
M
O
DUL
E
SPAR
K
IGNIT
ION
BU
R
N
ER
GN
D
24V GN
D
MV
/P
V
PV MV
CI
R
C
UL
A
TI
O
N
R1
W
1
SPI
LL
RO
LL
O
U
T
X
B
NO
C
FL
O
W
SW
IT
CH
IN
LE
T
SENSO
R
SYSTE
M
DIF
FE
R
E NT
IA
L
24
0
SE
TPO
IN
T
16
0
O
FF
RE
LA
Y
PU
M P
140
12
0
220 20
0
180
7 6 5 8
9
5
15 14 13 12
10
11
10
OF
FS
E T
HIGH-
FIRE
0
TAN
K
SY
S/
SEN
S O R
IN
LE
T 20 15
BO
X
DEP
ICT
S
OP
TI
ON
A
L I
TE
M
S
24VDC
Y
TR
A
N
S
FO
R
M
E
R
BL
SENSO
R
RELAY
A P2 P1 1 2
1 2 3 4
OR BN BK Y T
W
LO
W
W
A
TE
R
CUTO
FF PLUG
54
3
2
1
VENT
DAM
P
ER
B
N
O
R
BN
BK
Y
BL
R
PK
B
L
Y W P
R
PR
PR
PR
PR
PR T Y BL
RW
T
PR
BL
R
Y
GY
GY GY
GY
Y G R W BL
BL
BK BK BL BL
OR OR
OR
BK
BK W
G
LO
W
W
A
TER CUT
O
FF
W
BK BK
BK
G JU
NCTI
O
N
BO
X
DIS
C
ON
NE
CT
POW
E
R BE
FO
RE SERVI
CIN
G
SW
IT
CH
M
A
NUAL RESET
HI
G
H
L
IM
IT
SW
IT
CH
AUT
O
-R
ESET
HI
G
H
L
IM
IT
PILOT
VENT DAM
P
ER
PLUG
W
H
E
N
R
E
P
LA
C
IN
G
W
IR
IN
G
, U
S
E
WI
R
E
O
F E
Q
U
A
L O
R
H
IG
HE
R
TE
M
P
ERATURE AND G
A
UGE
.
OR
(B
LA
C
K
)
PUM
P
P
K
W
W
PUM
P
21
C
0.9
0.7
60
50
0.6
O.
A . M
A X .-° F
40
45
70
VR1
65
1.5
0.5
RA
TI
O
VR2
1.1 1.3 1.0
W 1
W 2 W3
O .A . S
HUT
DO
W N
SH
U TD
O W
N -°F
50 40
45
70
55 VR3
60
55
65
O .A. SEN
S O R
DI S A B LE
SW 1
0.8
EN
A B LE
ON
CN1
LOW FI R E
HIG
H
FI
R E
OU
TD
O
O
R
SENSO
R
OUT
D OOR A
IR RE
S
E T
P
O
R
2
1
3
BK
GY
Y GY
LO
UVER
RELAY PLUG
LO
UVER R
E
LAY
4
3
2
1
5
CO
NTACT
O
N
AN
Y FAI
LURE
31
5&
360 O
N
LY
R
Y
WP
R
T
M
A
NUAL
RESET
1 2 3 4
BK Y OR BN
AUT
O
RESET
BK=BLACK B
L=BLUE
BN=B
RO
W
N
G=
GR
E
E
N
GY
=G
R
A
Y
O
R
=O
RANG
E
PK=PI
NK
PR=P
U
R
PLE
R=
R
E
D
T=TAN W=
WH
IT
E
Y
=YELLO
W
PO WE R S UPP LY
DELAY
LB
L2
01
59
REV
A
C MV PV
HI
R2
W2
VP VENTER
C
R