20
Primary Pump
POWER SUPPLY
Black
Electrical Box
15 AMP FUSED
120/1/60
120V WIRING
G
reen
Bl
ue
White
Contacts that energize
these inputs
MUST BE DRY
CONTACTS ONLY
N
O
5V WIRING
T
A
C
D
CAUTION
Th
erm
os
tat
R
W
Outdoor
Probe
Flow Switch
7.1 Simplified Wiring Connections
Heat and Indirect Wiring
Combi Wiring
The boiler must be electrically grounded in accordance with the National Electrical Code ANSI/NFPA 70,
or local codes, and/or the Canadian Electrical Code CSA C22.1.
Warning!!! A bad installation could ruin the Sentry
Board and void your warranty.
•
Before providing 120 Volts to the boiler, do a continuity check between all wires and ground to make
sure that there are no electrical leaks that could damage the board.
•
Before providing 120 Volts to the boiler, do a polarity check of the line and neutral wires, line must be
connected to black and neutral must be connected to white.
•
Do not use magnetic tip screwdriver near the Sentry board.
•
Verify that the wires connected to the Sentry
TC and AC terminals are not grounded
, or have
any voltage applied to them, or voltage to ground (dry contact closure only).
•
Ensure that the probe wire is not damaged.
•
Caution: Label all wires prior to disconnecting them when servicing controls. Wiring errors can cause
improper and dangerous operation
Aquastat
Indirect
Gr
ee
n
Pu
rp
le
Electrical Box
Blu
e
Black
N
120/1/60
15 AMP FUSED
POWER SUPPLY
CAUTION
White
Circulator
* Indirect
120V WIRING
Primary Pump
5V WIRING
C
A
D
O
T
Probe
Outdoor
W
Th
erm
os
tat
R
Contacts that energize
these inputs
MUST BE DRY
CONTACTS ONLY
