TLR-D42 Fan coil unit controller for 3-speed fans and 2 modulating actuators

The TLR-D42 is a stand-alone electronic single loop controller with a fan control option and one PI heating and cooling sequence. The controller includes 1 NTC room temperature sensor, 3 + 1 relays outputs and two analog outputs. A detailed adaptation to local conditions is possible with the use of a simple configuration routine.

The TLR-D42 can be configured using the standard operation terminal. No special tools or software is required.

The TLR-D42 has been specifically developed to switch larger fans with switching power of up to 10 (6) A.

 Applications

1 or 3 speed air handler units or fan coils, cooling and/or heating, for 2-pipe or 4-pipe systems with one or two modulating valves; and/or one ON/OFF control (electrical heat, gas heat, hot water spring return valve, etc).

VAV units with heat and cool air supply (auto change-over), fan powered option; local heating coil (electrical, hot water coil, etc.).

Features Specifications:

• Temperature control for 2-pipe and 4-pipe fan coil systems.
• Relays switching up to 10(6)
• Three binary outputs for fan speeds
• Two analog output for modulating 0-10 V actuators
• One binary output for a spring return zone valve, electric heat, gas heat, etc.
• Automatic fan control for three stage fans.
• Control for heating, cooling and fan only operation
• Cost saving option with economy functionality and set point limitation
• For large rooms: Master – Slave option: One terminal may drive up to 8 base units in parallel.
• External sensor or open contact for remote control, external heat – cool change or auto-changeover on supply or outdoor temperature with selectable activation limits
• Password protected programmable user and control parameters
• Temperature display in Celsius or Fahrenheit

Deluxe version

• Clock and time schedule functions with special options for schools and universities
• Clock keeps running for 48h in case of power failure
• Display with blue backlight
• Infrared remote controller option: with special features for boost and delayed switching on or off