OPT. ALARM HARNESS
PR 1
3-WAY
VALVE
LOUVERS
STAGING
BR
R/O
3
T/W
4
Y
5
BL
6
5
P
6
P
7 BR/W
8
R
9
R/BK
R/W
10
G
12
GY
10
BK/W
8
BK
6
P
4
BR/W
2
2
BL
X1
1 PR
11 GY
12 W/BK
1
W
X8
F4
3 W
1
Y
X13
F2
7 GY
R/BK
BL
5
R/BK
6
BR
7
CONTROLLER
F5
Y
1
BR/W 3
BL
4
PR
5
6
R/W
7
BR
BK
8
Y/G
9
BL/BK
GY/W 2
GY/W 1
10
O/R
4
X2
F6
R
1
MODBUS
MODULE
CONNECTIONS
FUSE AMPS
F2 =
F4 =
F5 =
F6 =
Y 3
2
X7
4
BL
1
R
2
O/BK
3
R
4
POOL SUP
SENSO R
O/R
Y
1
P
2
5
BK
4
PR
3
PR
2
P
1
P
INLET
SENSOR
10K/20K
G
W
10K
4
3
2
BK
1
R
X12
8 BK/R
W
3
1
X11
X4
X9
Y
6
BR
7
24V COM
OPT. MODBUS HARNESS
SYSTEM PUMP
RELAY COIL R
120V
W
P
Y
S3/S4
Y
S1/S2
60VA
Y
2
BL 3
2 Y
3 BL
CKT. BREAKER
PR
G
BR
1HP UNIT
MAX PUMP
BR
BR
BR
CHASSIS
GROUND
W
ON/OFF
SWITCH
GY/W 4
AC
PUMP RELAY
120VAC COIL
Y
4
Y
5
Y
6
BL
1
R/O
2
R/W
3
1
2
2
BK/W
4
1
O
2 O/BK
R/W
T
W
11
P
BL
8
PR
10
Y
4
Y
5
Y
O/
BK
R Y R
R Y R
1
1
2
3
13
GY
14
T/W
12
15
R/W
3
2
1
6
5
4
TEST
LWCO
PROBE
RESET
G
LWCO
24VAC
3
PR
Y BL BL
PR
3
2
1
6
6
CONNECTION
BOARD
2
1
2
1
2
1
2 O/BK
1
O
2
1
2
O
1 O/BK
O
BL
O/BK
R
16 BR/W
1
R
120V
R
SILENCING
SWITCH
1
DIGITAL
HARNESS
HI-LIMIT
PR
PR
Y
BL
2
1 C 2
NC C NO
AUXILLIARY
2
3
GY
ALARM RELAY
120VAC COIL
ALARM
BELL
O
2
3
G
GROUNDING
OPTION
JUMPER
LOW VOLT HARNESS
1
R/BK Y R/BK R/O Y R/O
1
2
3
6 Y
2
3
O O/BK
1
2
R/O Y R/O
3
1
2
3
R/W Y R/W
1
2
S1
S2
S3
S3
S4
1
2
3
4
5
6
STAGE #1
STAGE #2
BURNER
#1 HSI GROUND
1
GY
GY 1
3
GY
GY 3
5
G
G
5
2
GY
G
G
GY
3
1 BK
HI
HI
STAGE #3
STAGE #3
R
R
LO
LO
R
2
3
W
3
G
NEU
GND
W
4
NEU
GND
G
4
BK/
W
BK
BK
1
3
G
G
3
BK/R
5
BK
R
BK/
W
HI LO
120V
G
TO
PWR
HI/LO SPEED RELAY
120VAC COIL
W
4 BK/W
!
DANGER
TO PREVENT ELECTRICAL SHOCK
THIS HEATER MAY BE CONNECTED TO MORE THAN ONE BRANCH
CIRCUIT. MORE THAN ONE DISCONNECT SWITCH MAY BE
REQUIRED TO DE-ENERGIZE THE EQUIPMENT FOR SERVICING.
BK
BK
W
W
50VA
60VA
75VA
100VA
FIELD
OPTIONS
WIRE COLOR REFERENCE
BL
GAS VALVE XFMR
1
BK 1 TO
2
3
W 3 XFMR
W
MODBUS ADAPTER
FACTORY
OPTIONS
BL
CIRCUIT
BREAKER
G
TO
CONNECTION
BOARD
2
W
120V
3
BK
BK/ BK/
W
R
MAIN UNIT HARNESS
2
G
120V
W
BLOWER RELAY
120VAC COIL
1
BL
2
1
4 GY/W
1
1
STAGE #4
BURNER
#2 HSI GROUND
GY/W
BK
2
GY/W
6 GY/W
1
4
P
1
LO - GAS
O
BL
R
2
5
P
5
4
HI-GAS
O/R
BL
11 W/BK
T
BL
CHASSIS
GROUND
O/BK
12
T
FLOW
SWITCH
BK
R
MAIN UNIT
O
BLOCK
FLUE
COM
SWITCH
NO
AIR PROVE
COM SWTICH
S1
LOW GAS
SWITCH STAGE #1
3 R/BK
5 BK/R
4
LOW
VOLTAGE
HARNESS
T
O/BK
NC
BL
IGNITER
W
1
2
O/BK
24V
BK
2
GY/W 6
120V
W/R
2
3
120V
BK
G
BR/
W
BK
W
120V/60Hz NEUTRAL
SUPPLY
LINE
GROUND
1 BK
3 W
BK
1
G 2
3
W
24V
W
CONTROLLER
XFMR
120V
IND-DHW PUMP
RELAY COIL R
120V
24V
GROUND
13
12
O
O/BK
1
2-SPD BLOWER
O
G
BK
Y
FLOW SWITCH
12 BL/BK
15
14
BL
Y
2
4
NOTE: NUMBER OF GAS VALVES VARIES BY MODEL
BR
MAIN POWER HARNESS
O
BL
LWCO
1 BL
CONSULT
FACTORY
DISPLAY
Y
BR
Y/G
IDENTIFICATION PLUG
MODEL SPECIFIC
X10
7 R/BK
4
18
X6
X5
6 W/R
W/BK 2
GY
16 BK/R
5
R/O
X3
T
19
17 BR/W
10
O/R
T
20
12
R
BOILER/POOL HEATER
SAFETY
OUTLET
SENSOR
3
W/BK 8
CASCADE
MODBUS
1
3
Notes:
1. All wiring must be installed in accordance with : local, state , provincial and national code requirements per either
N.E.C. in USA or C.S.A. in Canada.
2. If any original equipment wire as supplied with the appliance must be replaced , it must be replaced with wire
having same wire gauge (AWG) and rated for a minimum of 105°C
3. Actual connector block locations may vary from those shown on diagrams . Refer to actual components for
proper connector block locations when using diagrams to trouble shoot unit .
OPT. ALARM
DIGITAL HARNESS
4 PR
BL 2
Y
LOW VOLT HARNESS
+ +
+ ALARM
1 + CONTACTS
2
TO MONITORING DEVICE
3 + RUNTIME
+ CONTACTS
4
OPEN
+
3-WAY
5 + OPEN
24V
CLOSE
CLOSE
VALVE
CN4
6 + COM
COMMON
7 +
S1
STAGE #1
8
S1
9 +
+ S2
CONNECT
STAGE #2
10
TO
+ S2
11
TERMINAL
STAGE #3
12 + S3
#19
S3
13 +
(LOUVER
14 + S4
STAGE #4
RELAY)
+ S4
15
COM
FIELD CN5
16 + LOUVER PROVING
PROVE
+ SWITCHSUPPLIED
17 +
LINE
WIRING
LOUVER
RELAY
R
18
M
+ COIL
19 +
NEU
TANK
20
AQUASTAT
+ AQUASTAT
21 CN3
TANK
SENSOR
22 + TANK
+ SENSOR
23
24 + SHIELD
CN6
+ A
UNITS
25
B
26 + SHIELD
+
27
FROM
0- 10V DC IN
28 + +0-10V
BMS
+ -BMS IN
COMMON
29
0- 10V DC OUT
TO
30 + +0-10V
+ -RATE OUT
COMMON
BMS
31
MOD
32 + SHIELD
CN1
+ A
BUS
33
+ B
34
BMS
SHIELD
35 +
CN2
POOL
OUT
SAFETY
OUTDOOR
BK DOOR
10K 1 + SENSOR
SUPPLY
AIR
G
+
10K 20K
2
+ SYS SUPPLY
R
3
10K/20K W
10K
SENSOR
10K
+
10K
4
+ SYS RETURN
POOL/BOILER 10K
5
CN1
+ SENSOR10K
FROM
6
0-10V DC IN
+ 0-10V SYS
PUMP
7
COMMON
+ - PUMP IN
OUTPUT
8 CN2
~~~~
~~~~
~~~~
FIELD WIRING
TO MONITORING DEVICE
BL
BL
Y
Y
W = WHITE
T=TAN
BK = BLACK
Y=YELLOW
PR=PURPLE
BR=BROWN
BL=BLUE
G=GREEN
P=PINK
GY=GRAY
R=RED
O=ORANGE
Y/G = YELLOW WITH GREEN STRIPE
LBL20082 REV A