Connection Diagram - Lochinvar 502-2072 Installation & Operation Manual

9

Connection diagram

FIELD WIRING
+
ALARM
TO MONITORING DEVICE 1
+
CONTACTS
2
+
RUNTIME
3
TO MONITORING DEVICE
+
CONTACTS
4
+
OPEN
OPEN
3-WAY
24V 5
+
CLOSE CLOSE
VALVE
6
+ COM
COMMON
7
+
S1
STAGE #1
8
+
S1
9
+
S2
10
STAGE #2
+ S2
11
+
STAGE #3 12 S3
+
S3
13
+
14 S4
STAGE #4
+
S4
15
+
COM
LOUVER PROVING
16
SWITCH SUPPLIED
+
PROVE
17
+
LINE
LOUVER RELAY
R 18
M
+ COIL
19
NEU +
TANK
20
+
AQUASTAT AQUASTAT
21
CN3
+
TANK TANK
22
SENSOR
+
SENSOR
23
+
24 SHIELD
+
UNITS A
25
+
B
26
SHIELD
+
27
FROM
0- 10V DC IN
+
28 +0-10V
BMS
+
-BMS IN
COMMON
29
TO 0- 10V DC OUT +
+0-10V
30
+
BMS -RATE OUT
COMMON
31
+
MOD 32 SHIELD
+
A
BUS 33
+
B
34
BMS
+ SHIELD
35
CN2
POOL
SAFETY
OUT
BK + OUTDOOR
10K
DOOR 1
SUPPLY
SENSOR
G
AIR +
2
+ SYS SUPPLY
R
10K/20K 10K
3
SENSOR
W
+
4
+
SYS RETURN
10K
POOL/BOILER
5
SENSOR
+
FROM 6
0-10V DC IN
+
0-10V SYS
PUMP
7
COMMON +
- PUMP IN
OUTPUT
8
CN2
BOILER/POOL HEATER
10K/20K
SAFETY
G
OUTLET
W
SENSOR
10K
INLET
SENSOR
IND-DHW PUMP
W
R
RELAY COIL
P
120V
SYSTEM PUMP
W
R
RELAY COIL
PR
120V
BR
1HP
UNIT
MAX PUMP
BR
W
NEUTRAL
120V/60Hz
SUPPLY
LINE
BK
GROUND G
NOTE: Not all connections/features apply to pool heaters.
OPT. ALARM HARNESS
PR
1
4
BL 2
5
Y
3
CN4 6
BR
1
7 BR/W
8
R/O
3
9 R/BK
T/W
4
R/W
10
Y 5
GY
CN5 11
FIELD
BL
6
12 12 W/BK
WIRING
Y
1
6 R/W
CN6
7
BR/W
3
8 Y/G
BL
4
BL/BK
9
PR 5
O/R
10
CN1
1
MODBUS
MODULE
2
CONNECTIONS
20K
10K
10K
Y 1
10K
5
P
2
6
CN1
10K
7
8
4
2 2
BK W/BK
3
1 R W 1
BR
BR
MAIN POWER HARNESS
OPT. MODBUS HARNESS CONTROLLER
1 BK
BK
1
G 2
3 W
W 3
BR/W
BK
W
BK
CHASSIS ON/OFF
GROUND SWITCH
Installation & Operation Manual
PR
P
G 12
P
GY 10
8
BK/W
7 GY
R
BK 6
4
P
3
W
BR/W 2
1
PR
BR
4
BK
GY/W
2
GY/W 1
R
Y
3
T
4
PR
3
PR
2
P
BK
1
P
W/R
R/BK
BK/R
4 Y
3
Y
24V COM
G Y
24V
Y
GROUND
XFMR
Y
2 2 Y
60VA
BL 3
3 BL
CKT. BREAKER
BR BR
NC
C
NO
PUMP RELAY
120VAC COIL
LOW VOLT HARNESS
DIGITAL HARNESS
F2
F4
X1
CONTROLLER
F5
FUSE AMPS
F2 =
F4 =
X2
F5 =
F6 =
F6
X3
X10
X12
X9
DISPLAY
S3/S4
BL
1
4
R/O 2
5
R/W
3
6
S1/S2
1 BL
4
Y
2
R
5
Y
3 R/BK
6
Y
GY GY
1
G 2
3 GY GY
GY/W 4
G G
5
GY/W
6
IGNITER
BK
1
W 2
G
3
BK/W 4
BK/R
5
MAIN UNIT
X13
X8
X7
X6
X5
X11
X4
O/
O
BK
Y
Y
LOW GAS
Y
SWITCH
1
2 G
3
4 GY/W
5
GY/W
6
BK
1
2 W
G
3
4 BK/W
BK/R
5
65