Bally Refrigerated Boxes Modular Buildings - Manual (Page 7)

REV: 1/2013 Instruction Manual IM-238-94 2013 © Bally Refrigerated Boxes, Inc. 7
17. Panel Penetrations
If penetrations in panels are needed, avoid the areas
that are shown. Penetrations should be made as needed
by competent installer or mechanical service. If shaded
areas are avoided, urethane insulation can be easily
removed from opening. After equipment installation, fill
in hole with permagum caulk. See Figure 12.
Condensation in electrical junction boxes can be
eliminated by installing a seal-off fitting in conduit
where they pass through Modular Building walls.
18. Prevent Vapor Leaks
A. Modular panels are square and dimensionally accurate so in most
installations they will seal effectively against vapor leaks. However
in some unusual cooler applications, minor vapor leaks may occur.
The leaks can occur if the panels follow slab variations or if the
building in which the Walk-In is installed settles. If the internal
temperature is cycled periodically, the expansion and contraction
of building materials will cause enough movement to allow some
vapor penetration.
B. Unfortunately, internal dripping does not always occur directly
across from the vapor leak which can make locating a leak
troublesome. In order to avoid time-consuming search procedures,
caulk the exterior junction of three or more panel joints. Most leaks
caused by settlement will be at these points.
C. All wall penetrations should be sealed. This includes any
protruding clips or hangers installed in panels joints.
D. Use either industrial-grade or silicone calking. When silicone is
used, sealed areas must be cut opened whenever the panels are to
be disassembled for relocation or enlargement.