25
Once the room thermostat is satisfied, it breaks power to the TT terminal of the pump controller, which
opens the X –X contacts, which opens the T-C circuit. The Pumps and burner turn off.
In an injection system, it is important to understand the effect of flow and temperature set points. It is
recommended that the Sentry controller’s set point is at least 20
°
F higher than the desired Mix
temperature of the Hottest Loop.
Consult the Tekmar installation manual for detail installation and operation of this control.
8.0 SENTRY 2100T CONTROLLER
The Sentry controller is the central controller for the Trinity boiler. The Sentry handles all the combustion
logic, together with the energy management functions. The Sentry 2100T operates in two different modes,
reset or conventional. The mode is automatically determined by the presence of the outdoor sensor.
When the Sentry 2100 detects the presence of the outdoor sensor the controller will operate in Reset
Mode. If the outdoor sensor is not installed, the controller will operate in Conventional Mode. If outdoor
sensor is connected after start-up boiler must be powered off and on.
Sentry Display
The following describes the meaning of the lights on the Sentry controller.
Green Lights
Burner/Bruleur
= Indicates that the ignition
system is activated
Circ
. = Indicates that the heating pump is
energized
Circ. Aux
.= Indicates a call for DHW, and
Indirect pump or 3-way valve is activated.
Thermostat Demand
= Indicates that terminals
T-C are closed, iniating a call for heat.
Indirect Water Heaters
The Sentry 2100 comes with
an input and output for a
120-volt indirect pump.
When the A-C terminals are
closed (dry contact) the
boiler will go immediately to
indirect domestic mode,
whereby the indirect pump is
activated, and the boiler will
modulate to the LO setpoint.
LED Display indicates the value of
the information being displayed.
Water Temp
= When
illuminated, indicates
that the display is
showing boiler water
temperature.
Air
= If the air sensor is
being used. When
illuminated, indicates
that the display is
showing outdoor air
temperature.
Gas Input
Value
=
When illuminated,
indicates the current
input level (40-240 on
Ti200, 48-240 on
Ti150). See Chart to
determine input.
DHW Temp.
=
When illuminated,
indicates that
there is a call for
domestic hot
water.
Display Data - Input conversion chart
25
50
75
100
125
150
175
200
240
215
190
165
140
115
90
65
48
40
LED Display
BT
U (
000's
)
Ti150
Ti200
