Small Square Therma-Fuser (TK)

The Acutherm TK is a 12 5/8″ (320 mm) small-format Therma-Fuser® diffuser that delivers precise VAV heating and cooling control in compact ceiling spaces. It features integrated thermostats, mechanical thermal actuation, and provides quiet, proportional air modulation without any external wiring or pneumatics.

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Acutherm TK Small Square Therma-Fuser diffuser

Description

Product Model TK 12 5/8″ Small Square Diffuser Info:
  • Model: TK — Small square Therma-Fuser diffuser
  • Types: TK-HC (VAV heating & cooling), TK-C (cooling only), TK-D (manual), TK-RA (return air).
  • Inlet Sizes: 6″ round
Features
  • Compact 12 5/8″ × 12 5/8″ design for task or workstation conditioning applications.
  • Thermally powered operation — no wiring, sensors, or pneumatics required.
  • Separate heating and cooling thermostats provide independent zone control (TK-HC).
  • Automatic changeover between heating & cooling by sensing supply air temperature.
  • Factory settings: Heating 74 °F / 23 °C and Cooling 74 °F / 23 °C; field adjustable.
  • Maintains room temperature within ±1.5 °F (0.9 °C) of setpoint.
  • Ten-year manufacturer warranty.
Options
  • Remote Adjust: DA1 or DA1M for Digital Wall Adjuster
  • Insulation: I (attic-side insulation)
  • Security Hanger: H
  • Blow Patterns: TKD3 (3-way), TKD2C (2-way corner), TKD2 (2-way opposite), TKD1 (1-way)
  • Silk Screen: S (appearance panel pattern)
  • Sensor: SMCS or SENSOR for integration with 3rd-party monitoring
Accessories
  • Ceiling Frames: AC-TKHD (hard ceiling), AC-TK24 (24 × 24 lay-in), AC-TK600 (600 mm lay-in)

TK diffusers use a four-damper system for proportional control, with adjustable cam settings for balancing and minimum airflow. Appearance panel unlatched for easy setpoint access.

Quick Specs

  • Face Size: 12 5/8″ (320 mm) square
  • Inlet Size: 6″ round
  • Setpoint Range: Cooling 70–78 °F (21–25.5 °C); Heating 68–76 °F (20–24 °C)
  • Changeover (TK-HC): Cooling→Heating begins 74 °F / 23 °C, completes 80 °F / 26.5 °C; returns 68 °F / 20 °C
  • Static Pressure: Recommended 0.05–0.25 in. wg (12–62 Pa)
  • Construction: Steel housing with hinged solid appearance panel
  • Warranty: 10 Years

Downloads

Submittal (PDF) IOM (PDF)

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