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THERMA-FUSER™
TROUBLE SHOOTING
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
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. (TL-CW only)
Therma-Fuser Diffuser Check List
Once the above checks have been completed, examine and record the following (conditions may vary over time;
severalmeasurements at different times may be required):
1.
Room temperature 4 ft / 1.2 m above the floor directly
under the Therma-Fuser diffuser.
2.
Supply air temperature at the inlet of the Therma-Fuser
diffuser.
3.
Static pressure at the inlet of the Therma-Fuser diffuser.
4.
Cooling setpoint(s). See Fig. 7. Read the cooling
setpoint(s) by counting the lines from the bottom of the
scale to the bottom of the slider.
6
THERMA-FUSER™ - Manual | acutherm.com
3.
Maintaining static pressure at the inlet to each Therma-
Fuser diffuser between .05 and .25"wg/12 and 62 Pa.
4.
Maintaining continuous fan operation during occupied
hours.
5.
Blade opening(s). Look into the diffuser slot and observe
the blade position. Is it fully closed, fully open or part way
between? Is the gasket installed on the full length of each
blade?
6.
If possible, measure air flow with a flow hood or measure
air velocity as shown in Fig 6.
7.
Are the ends of the diffusers at least 2 in. / 50 mm apart?
8.
Is construction or other debris clogging the perforated
plate in the inlet?
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