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Blank-Off Installation for Plaque Diffusers
This section applies to the accessory installation of a Blank-Off for Greenheck model XG-5750 only. Blank-Offs are
used to block air from being distributed through one side of a plaque diffuser. Multiple Blank-Offs can be used on the
same diffuser to reach the desired direction of airflow.
A. Place the diffuser face up on a flat surface. Locate the plastic latches on each leg of the inner plaque face. Twist
the latches and remove the plaque face from the backpan – see Figure 8.
B. Place the plaque face with legs facing upwards. Locate the Blank-Off and two S-clips provided with the Blank-Off.
Install the S-clips onto the Blank-Off – see Figure 9.
C. Once both S-clips have been installed onto the Blank-Off, install the Blank-Off onto the plaque face of the diffuser
by sliding the S-clips on each leg – see Figure 10.
D. After installing the Blank-Off on the core, reinstall the plaque face onto the diffuser by hooking the legs into the
diffuser backpan and securing each latch – see Figure 11.
Figure 11 (Step D)
®
Figure 8 (Step A)
Figure 9 (Step B)
Figure 10 (Step C)
Ceiling Diffuser
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