Roberts Gorden CoRayVac CRV-B-9 - Manual (Page 46)

CRV-S ERIES I NSTALLATION , O PERATION AND S ERVICE M ANUAL
40
FIGURE 24: Non-Pressurized Outside Air Supply
Vent Cap
Outside Wall
7/16" (11.1 mm)
Diameter Hole
Pressure Switch
Lock Nuts
6' (1.8 m)
Maximum
Bird Screen
or
Description Part Number
Pressure Switch Kit 90434501
4" (10 cm) Bird Screen 01365400
4" (10 cm) Vent Cap 90502300
6" (15 cm) Vent Cap 90502302