84
106375-01 - 4/16
Figure 10.2: High Voltage PCB Terminal Connections
Figure 10.3: Low Voltage PCB Terminal Connections
X. Wiring
(continued)
OVERCURRENT
PROTECTION/
DISCONNECT
(BY INSTALLER)
H
OT
N
EUTRAL
GROUND
SYSTEM
PUMP
DHW
PUMP
BOILER
PUMP
120VAC/60HZ
POWER
SUPPLY
120 VAC Connections
Pump Fuse
120 V Line
System
Pump
DHW
Pump
Boiler
Pump
Spare Pump Fuse
Fus
e
250
V 6
.3
A
Slo
w
Blo
w
5
x2
0m
m
N
L
N
L
N
L
N
L
G
O
U
TD
OOR
SE
NS
OR
HON
EY
W
EL
L 320
039
71-
003
HE
AD
ER
SE
NSO
R
(
if us
ed)
TO MODBUS DEVICE
(if used)
24
V
O
LT
HEATI
N
G
TH
ER
MOSTA
T
D
HW
T
HE
R
MOS
TA
T
(i
f
us
ed)
EX
TER
N
AL
L
IMI
T(S
)
(i
f
us
ed)
TO
A
LA
RM
SY
STEM
EnviraCOM THERMOSTAT
(Optional - Replaces
Heating Thermostat)
(By Others)
1
REMOVE THIS JUMPER IF
EXTERNAL LIMIT IS USED
1
Low Voltage Connections
Fuse F1 250 V 1.6A Slow-Blow 5x20mm
EnviraCOM
MODBUS
Boiler-To-Boiler
Communication Network
V-
B
A
Header
Sensor
Outdoor
Sensor
R
W
C
Heat
T'stat
DHW
T'stat
External
Limit
Alarm
Spare
Fuse
C
D
R
