2.
Model DH56 dry sprinklers are intended for use in wet,
dry, and preaction systems to protect areas subjected to
freezing temperatures and unheated portions inside and
outside buildings. See Fig. 8 for guidelines on using dry
sprinklers in wet systems.
Environments wherein dry sprinklers are employed can
be corrosive. For this reason, Model DH56 dry sprinklers
have a special wax fillet placed in the gap between the cup
that supports the bulb and the wrenching boss. This wax
will not interfere with the operation of the sprinkler, and it
prevents contaminants from entering the internal portion of
the drop nipple. The wax must not be removed.
Application
The Model DH56 is a horizontal sidewall dry sprinkler
intended for installation in light hazard occupancies in
accordance with NFPA 13. These sprinklers are designed
to provide fire protection in long and narrow spaces such
as hallways, corridors, decks and rooms up to 28 feet
(8,5m) wide and 10 feet (3m) long. They are rated for
250 psi (17,2 bar) and can be mounted between 4 and 12
inches (102 and 305mm) down from the ceiling.
Fig. 1
