26Once the room thermostat is satisfied, it breaks power to the TT terminal of the pump controller, which opens the X –X contacts, whichopens 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 may be necessary to program theSentry controller 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 2100 CONTROLLER(Caution: Sentry controller used on Ti400 is different then the Sentry controller used on Ti100-200 models. The T4.1controller can only be used on Ti400’s, while the T2.2 controller can only be used on Ti100-Ti200’s)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 2100 operates in two different modes, reset orconventional. The mode is automatically determined by the presence of the outdoor sensor. When the Sentry 2100detects the presence of the outdoor sensor the controller will operate in Reset Mode. If the outdoor sensor is notinstalled, the controller will operate in Conventional Mode. If outdoor sensor is connected after start-up boiler mustbe powered off and on.8.1 Sentry 2100 DisplayThe following describes the meaning of the lights on the Sentry controller.Green Lights:Burner/Bruleur = Indicates that the ignition systemis activatedCirc. = Indicates that the heating pump is energizedCirc. Aux.= Indicates a call for DHW, and Indirectpump or 3-way valve is activated.Thermostat Demand= Indicates that terminals T-Care closed, iniating a call for heat.Water Temp= Whenilluminated, indicatesthat the display isshowing boiler watertemperature.Air = If the air sensor isbeing used. Whenilluminated, indicates thatthe display is showingoutdoor air temperature.Gas Input Value= Whenilluminated, indicates thecurrent input level (46-240on Ti100-150, 40-240 onTi200, 35-195 on Ti400).See Chart to determineinput.DHW Temp. = Whenilluminated, indicatesthat there is a call fordomestic hot water.Display Data - Input conversion chart050100150200250300350400240 215 190 165 140 115 90 65 48 40LED DisplayBTU (000's)Ti150 Ti200Ti400 Ti100