Ti Series Installation and Operation Instructions
│
Trinity
41
Zone Circulator System
– w/Multiple Temperatures
Figure 11-6 illustrates a typical wiring configuration required for a heating system with multiple space heating temperature
requirements. The example is of a system using two injection pumps controlled by two mixing controls. (Example shows a Taco
model SR504 zone controller and two Tekmar 356 mixing controllers).
Operation -
Room thermostat or the end switch of a zoned manifold closes the circuit to TT terminals of the zone controller. The
zone controller:
1.
Sends 120VAC to the applicable zone circulator (which circulates mixed water throughout the zone).
2.
Sends 120 volts to the injection pump, through the Tekmar 356 mixing controller.
3.
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) 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.
The 356 controller reduces or increases the speed of the injection pump, depending on the temperature at the “Mix sensor”.
Consult the Tekmar 356 installation manual for detailed installation, operation and set-up instructions.
Legend
P1- Primary Pump ZP- Zone Pump
P2- Indirect pump or 3-way Valve in Combi BS.- Strap on boiler sensor
CB- Trinity Control box MS.- Strap on mixing sensor
IP- Injection Pump ODS.- Outdoor sensor
Indirect Aqua-stat, or
combi flow switch
Loop 2 (Lo Temp.)
Thermostat, or
manifold end switch
Lo
op
#2
,
Lo
Te
mp.
Loop 1 (Hi Temp.)
Thermostat, or
manifold end switch
Lo
op
#1
,
H
i
T
emp
.
Figure 11-6 Zone Circulator System w/Multiple Temperatures
