22
T
C
A
%Ef.
Air
Water
Call for Heat
Aux. Pump
Heating Pump
Burner On
POWER SUPPLY
15 AMP FUSED
120/1/60
7.2.2 Multiple Zones with Taco Valve controller
(Models ZVC403 to ZVC 406)
The basic multiple zoned system using normally closed 2 – 3- or 4 wire Taco 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 TT terminals Taco ZVC403 to ZVC 406 zone controller. The controller
energizes the appropriate zone valve and closes the circuit between terminals T-C on the Sentry control.
The Sentry 2100 provides power to the primary pump and secondary pump via (C1), 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.
Legend
P1- Primary Pump P3-Secondary pump
P2- Indirect pump, or
CB- Trinity Control box
Combi Valve
