21
Warning
Maximum current of blue wire (C
1
) is 3
amps, with all pumps running. Current
in excess of 3 Amps, may damage the
board, and void the warranty.
7.2 Advanced Wiring Systems
7.2.1 Multiple 4 wire Zone Valves
The basic multiple zoned system uses normally
closed four (4) wire zone valves. This wiring
system is used with the piping as described in
Section 6.2.1 “Multiple Zones using Zone Valves”.
Operation
Room thermostat closes circuit to zone valve motor, thus opening the valve. When the valve is opened,
the end switch closes the circuit between terminals T-C on the Sentry control. The Sentry 2100 provides
power to the primary pump and secondary pump via (C
1
), once these pumps are on, it turns on the
burner.
Once the room thermostat is satisfied, it breaks power to the motor, which opens the end switch, and the
T-C circuit. The Pumps and burner turn off.
T
C
A
%Ef.
Air
Water
Call for Heat
Aux. Pump
Heating Pump
Burner On
POWER SUPPLY
15 AMP FUSED
120/1/60
Legend
P1- Primary Pump P3-Secondary pump
P2- Indirect pump, or
CB- Trinity Control box
Combi Valve