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wrapped around the standoffs to block one, two or three sides.
(Standoffs are the supports between the housing and the diffu-
sion plate.) Ways to do this are:
These can be removed in the field after first removing the dif-
1. Factory installed directional baffles. These are strips of metal
fusion plate assembly.
wrapped around the standoffs to block one, two or three sides.
These can be removed in the field after first removing the dif-
fusion plate assembly.
metal that are laid horizontally on top of the corner supports.
Dimensions are as shown in Fig. 5. Directional baffles can be
2. Field installed directional baffles. These are trapezoid pieces of
THERMA-FUSER
metal that are laid horizontally on top of the corner supports.
made locally or purchased from Acutherm.
Dimensions are as shown in Fig. 5. Directional baffles can be
made locally or purchased from Acutherm.
eration lines. Insert between the housing and the diffusion
3. 1-5/8" diameter x 10" long (Armaflex) for split system refrig-
BLOW PATTERNS (TF-C, TF-CW, AND TF-HC)
plate/blade assembly and wedge between the standoffs (See
eration lines. Insert between the housing and the diffusion
plate/blade assembly and wedge between the standoffs (See
Fig. 6). Not supplied by Acutherm but easily available in the
Fig. 6). Not supplied by Acutherm but easily available in the
field.
field.
The rule for blocking the appropriate side is: Always block the ther-
mostat side. (See Fig. 7 for examples.)
FIG. 5 FIELD INSTALLED BAFFLE
Fig. 5 Field installed baffle
8
7
/
" – 214mm
16
8
/
" – 214mm
7
16
/
"–19mm Dia.
3
4
"–19mm Dia.
3
/
4
1
9
/
" – 40mm
16
1
9
/
" – 40mm
15
/
" – 398mm
11
16
16
Corners Clipped – No Sharp Points
15
11
/
" – 398mm
16
Corners Clipped – No Sharp Points
Directional Baffle
Directional Baffle
Fig. 6 Foam directional baffle
FIG. 6 FOAM DIRECTIONAL BAFFLE
The thermostats may be slightly harder to screw in or out when
The thermostats may be slightly harder to screw in or out when
warm because the shaft is extended putting more pressure on the
warm because the shaft is extended putting more pressure on the
thermostat. If you are unable to turn the thermostat in this situa-
thermostat. If you are unable to turn the thermostat in this situa-
tion, cool the thermostat by holding an ice cube to the large end.
tion, cool the thermostat by holding an ice cube to the large end.
The shaft will then contract and the thermostat will turn easily for
The shaft will then contract and the thermostat will turn easily for
adjustment.
adjustment.
For proper operation make sure that the extension shaft on the
For proper operation make sure that the extension shaft on the
cooling thermostat is in the actuator arm dimple. Check by sight-
cooling thermostat is in the actuator arm dimple. Check by sight-
ing through the control plate viewport. (See Fig. 4) If the shaft is
ing through the control plate viewport. (See Fig. 4) If the shaft is
not in the dimple, cool the thermostat by holding ice to the large
not in the dimple, cool the thermostat by holding ice to the large
end until the shafts retracts and move the shaft into the dimple.
end until the shafts retracts and move the shaft into the dimple.
BLOW PATTERNS (TF-C, TF-CW, AND
BLOW PATTERNS (TF-C, TF-CW, AND
TF-HC)
TF-HC)
FIG. 7 BLOW PATTERNS
A major selling feature of the TF-C, TF-CW and TF-HC diffusers
A major selling feature of the TF-C, TF-CW and TF-HC diffusers
Fig. 7 Blow Patterns
Fig. 7 Blow Patterns
is the ability to easily add or remove blow patterns in the field.
is the ability to easily add or remove blow patterns in the field.
This is done by blocking the air off behind the blades on the
This is done by blocking the air off behind the blades on the
appropriate sides.
appropriate sides.
DO NOT:
DO NOT:
— Disconnect the spokes.
— Disconnect the spokes.
— Tape, screw or otherwise lock the blade closed. This unbalan-
— Tape, screw or otherwise lock the blade closed. This unbalan-
ces the loads on the center bearings.
ces the loads on the center bearings.
— Block the four venturi nozzles.
— Block the four venturi nozzles.
DO block air flow behind the blades or between the standoffs.
DO block air flow behind the blades or between the standoffs.
(Standoffs are the supports between the housing and the diffu-
(Standoffs are the supports between the housing and the diffu-
sion plate.) Ways to do this are:
sion plate.) Ways to do this are:
1. Factory installed directional baffles. These are strips of metal
1. Factory installed directional baffles. These are strips of metal
wrapped around the standoffs to block one, two or three sides.
wrapped around the standoffs to block one, two or three sides.
These can be removed in the field after first removing the dif-
These can be removed in the field after first removing the dif-
fusion plate assembly.
fusion plate assembly.
3-Way D3
3-Way D3
3-WAY D3
2. Field installed directional baffles. These are trapezoid pieces of
2. Field installed directional baffles. These are trapezoid pieces of
metal that are laid horizontally on top of the corner supports.
metal that are laid horizontally on top of the corner supports.
Dimensions are as shown in Fig. 5. Directional baffles can be
Dimensions are as shown in Fig. 5. Directional baffles can be
6
THERMA-FUSER - Manual | acutherm.com
made locally or purchased from Acutherm.
made locally or purchased from Acutherm.
3. 1-5/8" diameter x 10" long (Armaflex) for split system refrig-
3. 1-5/8" diameter x 10" long (Armaflex) for split system refrig-
eration lines. Insert between the housing and the diffusion
eration lines. Insert between the housing and the diffusion
plate/blade assembly and wedge between the standoffs (See
plate/blade assembly and wedge between the standoffs (See
2-Way D2C Corner
2-Way D2C Corner
Note: Some earlier TF-C and TF-CW models have one induction
Note: Some earlier TF-C and TF-CW models have one induction
slot by the thermostat instead of four venturi nozzles. The
rule for blocking the appropriate side for this version is:
Never block the thermostat side.
When blocking for direction, the air volume for a given static
When blocking for direction, the air volume for a given static
A major selling feature of the TF-C, TF-CW and TF-HC diffusers is the ability to easily
pressure is reduced from max. air volume listed in the perform-
pressure is reduced from max. air volume listed in the perform-
ance guide by:
ance guide by:
add or remove blow patterns in the field. This is done by blocking the air off behind
the blades on the appropriate sides.
DO NOT:
/
"
3
MAINTENANCE
32
2mm TYP.
3
3
/
" – 95mm
4
/
"
3
MAINTENANCE
32
The moving parts of the TF Therma-Fuser diffuser have no main-
•
Disconnect the spokes.
2mm TYP.
3
3
/
" – 95mm
4
tenance or lubrication requirements. We are often asked to rec-
The moving parts of the TF Therma-Fuser diffuser have no main-
ommend periodic maintenance procedures and a spare parts
•
Tape, screw or otherwise lock the blade closed. This unbalances the loads on
/
" – 1mm TYP.
3
stock. Recommended maintenance is to clean the outer surfaces
16
tenance or lubrication requirements. We are often asked to rec-
of the Therma-Fuser diffuser—nothing else. We do not recom-
ommend periodic maintenance procedures and a spare parts
the center bearings.
mend stocking any spare parts. Our customers also confirm that
/
" – 1mm TYP.
3
stock. Recommended maintenance is to clean the outer surfaces
16
stocking is unnecessary.
of the Therma-Fuser diffuser—nothing else. We do not recom-
•
Block the four venturi nozzles.
DAMPER BLADE ADJUSTMENT (TF-C,
mend stocking any spare parts. Our customers also confirm that
THERMA-FUSER
TF-CW, AND TF-HC)
DIFFUSER
stocking is unnecessary.
DO block air flow behind the blades or between the standoffs. (Standoffs are the
If one of the blades does not track uniformly with the others,
DAMPER BLADE ADJUSTMENT (TF-C,
make a simple field adjustment to the spoke wire which connects
supports between the housing and the diffusion plate.) Ways to do this are:
THERMA-FUSER
the blade to the control plate. A pair of needle nose pliers or sim-
TF-CW, AND TF-HC)
DIFFUSER
ilar tool is all that is required. If the blade does not open as rap-
1.
Factory installed directional baffles. These are strips of metal wrapped around
idly as the other blades, insert the pliers inside of the closed
If one of the blades does not track uniformly with the others,
loope in the spoke wire and slightly expand the loop. If the blade
make a simple field adjustment to the spoke wire which connects
opens more rapidly than the others, place the pliers outside of
the standoffs to block one, two or three sides. These can be removed in the field
the blade to the control plate. A pair of needle nose pliers or sim-
the closed loop and slightly compress the loop. No other adjust-
THERMA-FUSER
ment is required.
ilar tool is all that is required. If the blade does not open as rap-
DIFFUSER
after first removing the diffusion plate assembly.
idly as the other blades, insert the pliers inside of the closed
loope in the spoke wire and slightly expand the loop. If the blade
2.
Field installed directional baffles. These are trapezoid pieces of metal that are laid
opens more rapidly than the others, place the pliers outside of
the closed loop and slightly compress the loop. No other adjust-
horizontally on top of the corner supports. Dimensions are as shown in Fig. 5.
THERMA-FUSER
ment is required.
DIFFUSER
Directional baffles can be made locally or purchased from Acutherm.
3.
1-5/8" diameter x 10" long (Armaflex) for split system refrigeration lines. Insert
between the housing and the diffusion plate/blade assembly and wedge between
the standoffs (See Fig. 6). Not supplied by Acutherm but easily available in
the field.
The rule for blocking the appropriate side is: Always block the thermostat side. (See
Fig. 7 for examples.)
NOTE:
Some earlier TF-C and TF-CW models have one induction slot by the
thermostat instead of four venturi nozzles. The rule for blocking the appropriate side
for this version is: Never block the thermostat side.
When blocking for direction, the air volume for a given static pressure is reduced from
max. air volume listed in the performance guide by:
Page 3
2-Way D2 Opposite
2-Way D2 Opposite
2-WAY D2 OPPOSITE
1-Way D1
slot by the thermostat instead of four venturi nozzles. The
rule for blocking the appropriate side for this version is:
Never block the thermostat side.
Blow Patterns
Reduction
Blow Patterns
3 way
.78
3 way
2 way
.56
2 way
1 way
.34
1 way
Continued on next page
Fig. 7 Blow Patterns
Fig. 7 Blow Patterns
Blow Patterns
3 way
2 way
1 way
Page 3
3-Way D3
2-Way D2C Corner
2-Way D2C Corner
2-WAY D2C CORNER
Note: Some earlier TF-C and TF-CW models have one induction
Note: Some earlier TF-C and TF-CW models have one induction
slot by the thermostat instead of four venturi nozzles. The
rule for blocking the appropriate side for this version is:
1-Way D1
Reduction
.78
.56
.34
Continued on next page
Blade Opening
0.78
0.56
0.34
3-Way D3
2-Way D2 Opposite
slot by the thermostat instead of four venturi nozzles. The
rule for blocking the appropriate side for this version is:
Page 3
Page 3
2-Way D2 Opposite
1-Way D1
1-Way D1
1-WAY D1
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