Trinity
│
Installation and Operation Instructions
Ti Series
38
Advanced Wiring Systems
Zone Valve System
– No Zone Controller
Figure 11-3 illustrates a typical wiring configuration required for a heating system using zone valves without a zone valve
controller.
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 at the Trinity Ti Low Voltage field connection (See Table 11-2 and Figures 11-1 and 11-
2). The Sentry 2100 provides power to the primary pump (P1) and secondary pump (P3) via the C1 (blue) pump output, see Table
11-1 and Figures 11-1 and 11-2. The controller then operates the burner to maintain the Space Heat Set-point (HI), see Section
12.0.
Combi Boilers
- The indirect pump is replaced by the internal diverter valve in Combi boilers. Combi
boilers using this configuration must utilize a field supplied 120VAC relay (R) with a normally closed
contact (R1). The R relay is powered with the internal diverter valve on a demand for DHW; the R1 relay contact opens
preventing the Seconday pump (P3) from operating on a demand for DHW.
T
C
A
Blue
%Ef.
Air
Water
Call for Heat
Aux. Pump
Heating Pump
Burner On
Blue
White
Purple
Black
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
*R – 120V Relay Coil
*R1 - Relay Contact
* Only required with Combi boiler.
Figure 11-3 Zone Valve System – No Zone Controller
Indirect Aqua-
stat or Combi
flow switch
