Honeywell DTC 100/4 TD User Manual
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Honeywell DTC 100/4 TD User Manual

Honeywell DTC 100/4 TD User Manual

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DTC 100/4 TD
Differential thermostat for regulation of two heating
circuits in combination of solar and classic heating
with temperature display and regulation of burner or
electric heating element
DTC 100/4 TD
User's manual
Installation and maintenance instructions
1
ID-2106-13-DTC100-4TD-Honeywell-170039

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Summary of Contents for Honeywell DTC 100/4 TD

  • Page 1 DTC 100/4 TD Differential thermostat for regulation of two heating circuits in combination of solar and classic heating with temperature display and regulation of burner or electric heating element DTC 100/4 TD User’s manual Installation and maintenance instructions ID-2106-13-DTC100-4TD-Honeywell-170039...

  • Page 2: Dear Customer

    DTC 100/4 TD DEAR CUSTOMER Congratulations ! You have bought a DTC 100/4TD differential thermostat, manufactured according to the latest quality and safety standards. It is made according to the state of art and efficiently utilises solar energy or alternative sources for domestic water heating.

  • Page 3: Operation

    DTC 100/4 TD GENERAL DTC 100/4TD is a microprocessor aided double differential thermostat, designed for heating of domestic water from two heating sources (collectors, boilers, heat pumps,...), using its logic of additional energy source switching on (boiler of central heating system).

  • Page 4: Installation Of Thermostat

    DTC 100/4 TD When pump operates for primary heating circuit (collectors), operation of after-heating circuit and burner of boiler or electric heating element is prevented. This assures maximum energy savings during summer seasons and is also the main role of solar systems.

  • Page 5: Electric Connection

    DTC 100/4 TD ELECTRIC CONNECTION: Grounding wires should be connected to special terminal BOILER pins situated on right side of terminal strips. TERMINAL CONNECTION T1 sensor – heating source sensor (collectors, boiler…) T2 sensor – hot water tank sensor T3 sensor – heating source sensor for higher heating circuit (boiler) T4 sensor –...

  • Page 6: Control Panel

    DTC 100/4 TD SENSOR INSTALLATION IN BOILER: Built T3 sensor in a boiler as immersion sensor infront of mixing valve in upstream flow or next to boiler sensor in a sleeve. If this is not possible you can mount it as contact sensor in upstream flow in front of mixing valve.
  • Page 7 DTC 100/4 TD THERMOSTAT REGULATION The following settings are performed with keys situated under display: Maximum temperature in hot water tank. Difference of collector circuit. Difference of after-heating circuit (boiler). Setting two working regimes - C.n.b and C.d.t. Collector circuit operation switching off with automatic operation of after-heating circuit.
  • Page 8 DTC 100/4 TD 4. Setting the working regimes - C.n.b and C.d.t. On the display appears signs “C.n.b.” or “C.d.t.” Regime: C.n.b. Normal state of thermostat. Limitations of temperatures valid for collector circuit and after-heating circuit. This regime must be used in systems with heat pump.

  • Page 9: Temperature Display

    DTC 100/4 TD WARNING! If T2 and T3 keys are simultaneously pressed, you enter set-up menu. If in about 1 minute the values are not changed, regulator automatically leaves this menu (it shows T4 tem- perature in hot water tank). If you have changed the values and you haven’t left the set-up menu, entered values are not effective.
  • Page 10 DTC 100/4 TD Connection with two electric motor actuated ball valves When conditions for heating of a heating circuit are achieved, EMV110...800 series, opens afterwards, when the valve is opened, pump switches on. Differential thermostat DTC 100/4TD T1, T2, T3, T4...

  • Page 11: Connection With Two Pumps

    DTC 100/4 TD Connection with Two Pumps In order to prevent water circulation, behind the pump a retaining valve should be installed. When conditions for heating a heating circuit are achieved, pump switches on. Differential thermostat DTC 100/4TD T1, T2, T3, T4...
  • Page 12 DTC 100/4 TD Water After-heating with Electric Heating Element When water is after-heated by means of electric heating element, it must be connected through additional power relay and safety immersion thermostat. T4 sensor should be installed above electric heating element.

  • Page 13: Burner Control

    DTC 100/4 TD CONNECTION OF ELECTRIC HEATING ELEMENT POWER RELAY 230V, 50Hz SAFETY THERMOSTAT OF HEATING ELEMENT EL. HEATER BURNER CONTROL WARNING: Before opening, unplug from power supply. Only qualified person can maintain the apparatus.
  • Page 14 DTC 100/4 TD HOLES FOR EASIER INSTALLATION OF DIFFERENTIAL THERMOSTAT ON WALL...

  • Page 15: Troubleshooting Guide

    DTC 100/4 TD Trouble-shooting guide TROUBLE POSSIBLE FAILURE REMEDY Thermostat inoperative Plug not connected Connect plug in socket Water cools down during -Selector switch not in AUTO -Set the switch to AUTO night position position-Check machine -One of retaining valves installation.
  • Page 16 DTC 100/4 TD Advantages of motor actuated ball valves of EMV110..series with incorporated relay module for solar heating systems In solar heating systems motor actuated ball valves can prevent various inconveniences. • Effectively prevent hydraulic shocks in systems as they require 30 seconds for complete opening.

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