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TROUBLE SHOOTING (TK-HC, TK-C)
Trouble shooting Therma-Fuser diffusers requires looking at
the system as a whole. Before examining the Therma-Fuser
diffuser for failure it is worth the time to be sure the system
is functioning properly and that something has not been
overlooked. Before calling Acutherm, please complete the
data log for all Therma-Fuser diffusers to be evaluated.
SYSTEM CHECK LIST
The system should be:
1. Delivering 50°- 68°F/10° - 20°C supply air when in the
cooling mode.
2. Delivering 80°-120°F/26.5° – 49°C supply air when in
the heating mode.
3. Maintaining static pressure at the inlet to each Therma-
Fuser diffuser between .05” and .25”wg/12 Pa and 62 Pa.
4. Maintaining continuous fan operation during occupied
hours.
THERMA-FUSER DIFFUSER CHECK LIST
Once the above checks have been completed, examine
and record the following (temperature may vary over time;
several measurements at different times may be required):
1. Room temperature 4 feet above the floor directly under
the Therma-Fuser diffuser.
2. Supply air temperature at the Therma-Fuser diffuser.
3. Static pressure at the inlet of the Therma-Fuser diffuser.
Thermostats
Read setpoints here
Measure from induction housing
to edge of slider.
Cooling mode < 7/8 in / 22 mm
Heating mode > 1 in / 25 mm
TROUBLE SHOOTING DATA LOG
Time
Date
Location
Set Points
Heating Cooling
Damper
Opening
Cam
Position
Room
Temp
S.A.
Temp
Duct
S.P.
Blade
Opening
T-stat
Slider
4. Blade opening from the edge of the blade, measured
perpendicular to the housing.
5. Thermostat slider position.
6. Cooling and heating setpoints.
7. Damper opening cam—positioned for blades fully
closed, partially open or fully open.
8. Is the Therma-Fuser diffuser located within
2ft/600mm of a vertical protrusion such as a wall
or dropped beam which could disturb induction air
flow?
Foam
Housing
Blade
Small Steel Rule
TK-HC THERMA-FUSER diffuser
APPEARANCE PANEL REMOVED
