INSTALLATION IN EXISTING
CONSTRUCTION
Installing the unit in an existing house requires at least a small accessible area (attic or crawl space) above the planned installation location.
Review “INSTALLATION IN A NEW CONSTRUCTION SITE” and follow all instructions which apply to your installation.
LOCATION – Locate ventilator next to a ceiling joist. WIRING AND DUCTING – Refer to Figure 6 for wiring and to Figure 2 for ducting. Plan ducting and wiring before proceeding with installation.
CAUTION: Check area above planned installation to be sure that:
1.Ducting can be installed.
2.Wiring can be run to the planned location.
3.No wiring or other obstruction might interfere with installation.
INSTALLATION FROM ACCESSIBLE AREA ABOVE (Using headers)
1.From below, drill a small hole in ceiling at the planned location. Stick clothes hanger through hole to help locate the area from above.
2.Locate hole in attic or crawl space.
3.Refer to Figure 7. In attic or crawl space, mark ceiling for cutout by using the housing as a template. Cutout dimensions 103⁄16" x 143⁄8". The short side (103⁄16") or cutout must be next to the ceiling joist.
4.Make cutout along marked line.
NOTE: Refer to Figure 3. If ceiling is plaster, cutout should be made from below to avoid chipping plaster.
5.Refer to Figure 7. Install headers between joists using nails or screws leaving 103⁄16" between them.
6.Refer to Figure 7. The mounting brackets must be mounted on the long sides of the housing. NOTE: Each of the mounting brackets are secured by two (2) hex nuts.
7.Refer to pages 1 and 2. Mount damper section to housing, install housing and connect wiring and ducting. Install power unit, blower assembly and grille.
MOUNTING |
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BRACKET |
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| HOOK HANGER |
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| RODS FROM |
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| INSIDE TO |
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| OUTSIDE | HANGER | |
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| ROD | |
HANGER |
| POWER | |
ROD | SLOT | ||
UNIT | |||
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| FIGURE 6 |
MOUNTING | HEADER | |
BRACKET | ||
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HEADER |
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| FIGURE 7 |
