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OPERATING INSTRUCTIONS
Operating instructions for models STR-C and STR-HC
are located on the back of the appearance panel. See
Fig. 2.
OPENING THE APPEARANCE PANEL
The appearance panel is attached with two latch clips
on one side and hinges on the opposite side.
To open the appearance panel (on a Therma-Fuser
diffuser installed in the ceiling):
1.
Locate the side of the Therma-Fuser diffuser with
the thermostat. Using two hands, one on each side
of the channel, place your fingers above the
appearance panel and firmly pull down to
disengage the clips. The appearance panel will
rotate and hang down vertically on the hinges. See
Fig. 2.
Fig 2. Open Appearance Panel
To close the appearance panel:
1.
Rotate the panel upward.
2.
Latch the panel by pushing the clips into the small
square holes in the channel.
To remove the appearance panel:
1.
Open appearance panel as described above.
2.
Rotate the appearance panel away from the latch
clip bracket to force the hinge hooks open on the
panel.
3.
Slightly lift the panel to remove from the hinges.
To reattach the appearance panel:
1.
Hang the appearance panel on the hinges.
2.
Press the hinge hooks against the panel to close
around the hinge brackets.
3.
Close panel as describe above.
SYSTEM BALANCING
VAV systems are balanced for design air volume at
maximum air flow and systems using Therma-Fuser
VAV diffusers are no exception. When all the Therma-
Fuser diffusers are set for maximum air flow by fully
opening them, the system is really a constant air
volume system and is balanced as a constant volume
system. Balancing dampers are best located at the
takeoff before the runout to the Therma-Fuser diffuser.
1.
Prepare system for balancing. (Make necessary
checks for diversity, fan capacities, fan rotation,
minimum outside air requirements, duct leaks and
static pressure controller design setting. Set
outside air control damper for minimum air and
return air control damper for maximum air.)
Fig 3. Open for Balancing
To open, push the lever to the right and up.
To close, pull lever down.
2.
Open Therma-Fuser diffusers. STR-C and STR-
HC.
a.
Locate the side of the STR diffuser with the
thermostat and the balancing lever.
b.
Push the balancing lever to the right and up.
See Fig. 3.
3.
Start fans, adjust system for 100% air flow and
make system checks. (Measure static pressure
across filters and coils and at sensor for static
pressure controller. Measure supply, return and
branch duct air flow.)
4.
Measure air flow from each Therma-Fuser diffuser
and adjust the damper at the duct takeoff to obtain
maximum design air flow. Air flow measurement
may be taken with a direct reading diffuser
balancing hood. Measurements are made with all
appearance panels in place. This is because the
appearance panel affects pressure drop through
the diffuser.
