Lochinvar COPPER-FINN2 502 - Manual (Page 64)

64
Installation & Operation Manual
10
Ladder diagram
BL
O
W
ER
N
O
N
/O
FF
S
W
ITC
H
F2
3.
1
5
A
BO
X DEPI
CT
S
OP
T
ION
A
L
I
T
E
M
S
12
0 VAC
LO
W
VOL
T
AGE
TER
M
IN
AL
STRI
P
BL
O
W
ER
REL
A
Y
HI/L
O
SPEE
D
REL
A
Y
HI/L
O
SPEE
D
REL
A
Y
HI
G
H
SPEE
D
LO
W
SPEED
G
L
N
UNI
T
PU
M
P
REL
A
Y
X1 -6
F4 5A
BL
O
W
ER REL
A
Y
X1
-8
X1 -8
X1 -8
H
I/L
O
SPEE
D
R
E
L
A
Y
X2
-4
X1
-2
UN
IT
P
U
M
P
R
E
L
A
Y
X1
-1
X1
-4
TER
M
IN
AL
ST
RI
P
TER
M
IN
AL
ST
RI
P
SYST
EM
/
RECI
RC
PU
M
P
REL
A
Y
DHW
PU
M
P
REL
A
Y
(BO
IL
E
R
)
CHASSI
S
X1
-7
X2
-1
X1
-1
0
X2
-2
X1
-3
F5 5A F6 5A
STAG
E 1
HSI
STAG
E 3
HSI
X1
-1
2
X1
-2
X1
-3
X1
-1
M
O
D
B
U
S
IN
TER
F
AC
E BO
A
R
D
CI
RC
UI
T
BREA
K
E
R
OR F
U
S
E
TRAN
SF
O
R
M
E
R
IN
T
E
R
G
RAT
E
D CO
NT
R
O
L
BOA
R
D
X1
0
-1
X1
2
-1
X1
0
-2
X1
0
-3
X1
2
-2
X1
2
-3
STAG
E 1
G
AS VAL
V
E
STAG
E 2
G
AS VAL
V
E
STAG
E 3
G
AS VAL
V
E
STAG
E 4
G
AS VAL
V
E
X1
0
-5
X1
0
-6
X1
2
-5
X1
0
-4
X1
2
-4
MA
N
U
A
L
R
E
S
E
T
HI
G
H
L
IM
IT
X6
-4
X1
2
-6
CI
RC
UI
T
BREA
K
E
R
IN
TER
G
R
A
TE
D
CO
NT
R
O
L
BO
A
R
D
TRAN
SF
O
R
M
E
R
WHERE POSSIBLE, SWITCHES ARE SHOWN WITHOUT UTILITIES (GAS,
WATER OR ELECTRICITY) CONNECTED TO THE UNIT. AS SUCH, ACTUAL
SWITCH STATES MAY VARY FROM THOSE SHOWN ON DIAGRAMS
DEPENDING UPON WHETHER UTILITIES ARE CONNECTED OR A FAULT
CONDITION IS PRESENT. SEE WIRING DIAGRAM FOR ADDITIONAL NOTES.
NOTE: Not all connections/features apply to pool heaters.