Install Instructions

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Figure 10.2: High Voltage PCB Terminal Connections
Figure 10.3: Low Voltage PCB Terminal Connections
X. Wiring (continued)
OVERCURRENT
PROTECTION/
DISCONNECT
(BY INSTALLER)
HOT
NEUTRAL
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
Fuse 250 V 6.3 A
Slow Blow 5x20mm
N
L
N
L
N
L
N
L
G
OUTDOOR
SENSOR
HONEYWELL 32003971-003 HEADER SENSOR (if used)
TO MODBUS DEVICE
(if used)
24 VOLT HEATING
THERMOSTAT
DHW THERMOSTAT
(if used)
EXTERNAL LIMIT(S)
(if used)
TO ALARM
SYSTEM
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