
lp-666 Rev. 003 Rel. 001 Date 2.25.20
34
BLACK (HOT)
WHITE (NEUTRAL)
GREEN (GROUND)
POWER
SWITCH
BLOWER
BLK/BLU
BLACK
PUMP
RELAY
PUMP
RELAY
PUMP
RELAY
SYSTEM
PUMP
L
DHW
PUMP
BOILER
PUMP
L
L
N
G
N
G
N
G
120V LINE
120V NEUT
120V GND
LINE VOLTAGE
IN 120VAC
5V DC (USB)
NC
NO
ALARM
PUMP
POWER
N
C
N
O
L
N
G
S
D
C
SG
SN
SL
DG
DN
DL
CG
CN
CL
LE
D
1
LE
D
2
LE
D
3
ALARM
P5
NC
NO
GROUND J6
F3
F2
F1
WIFI POWER
FAN
SWITCH
P2
P3
P4
J5
J1
J4
F4
K1
U1
J7
P1
400-1500 HIGH VOLTAGE
CUSTOMER CONNECTION BOARD
SINGLE BOILER AND CASCADE MASTER
LP-666-X
09/20/19
**
**
**
** REQUIRED WHEN PUMP CURRENT > 2 AMPS
2A
2A
2A
15A
Figure 25 - Cascade Master and Single Boiler High Voltage Wiring - 400 - 1500 Models
BLACK (HOT)
WHITE (NEUTRAL)
GREEN (GROUND)
POWER
SWITCH
BLOWER
BLK/BLU
BLACK
PUMP
RELAY
BOILER
PUMP
L
N
G
120V LINE
120V NEUT
120V GND
LINE VOLTAGE
IN 120VAC
5V DC (USB)
NC
NO
ALARM
PUMP
POWER
N
C
N
O
L
N
G
S
D
C
SG
SN
SL
DG
DN
DL
CG
CN
CL
LE
D
1
LE
D
2
LE
D
3
ALARM
P5
NC
NO
GROUND J6
F3
F2
F1
WIFI POWER
FAN
SWITCH
P2
P3
P4
J5
J1
J4
F4
K1
U1
J7
P1
400-1500 HIGH VOLTAGE
CUSTOMER CONNECTION BOARD
CASCADE FOLLOWER
**
** REQUIRED WHEN PUMP CURRENT > 2 AMPS
2A
2A
2A
15A
Figure 26 - Cascade Follower High Voltage Wiring - 400 - 1500 Models