Protectowire 2000 FireSystem Instrukcja Użytkownika Pobierz pdf (Strona 18)

The HPC-2 contains an internal spring steel

drive clamp with gripping teeth that will

accommodate mounting surfaces from .06 to

.25 inches (1.5 - 6.4 mm) thick, making the clip

suitable for a wide range of applications such

as cable trays, storage racks, and ceiling joists.

Pipe Mounting

PM-3 Series Straps

The extensive use of Protectowire systems to

activate pre-action and deluge type sprinkler

systems, has lead to the development of the

PM-3 Series Pipe Mounting Straps. These dou-

ble loop straps are made of black weather

resistant 6/6 Nylon and may be used in tem-

peratures ranging from -40°F (-40°C) to 185°F

(85°C). To maintain flexibility and minimize

breakage during installation, PM-3 Series Pipe

Straps should be installed at ambient temper-

atures above 32°F (0°C) whenever possible.

In low temperature applications such as refriger-

ated warehouses and freezers, where it may be

necessary to commence installation while the

facility is at subfreezing operating temperature,

the PM-3’s should be kept at normal room tem-

perature prior to installation. The quantity of

PM-3’s taken into the subfreezing installation

area at any one time should be limited to the

number of straps which can reasonably be

installed during a 15 to 20 minute interval.

Regardless of the technique used for this type

of installation environment, some degree of

strap breakage must be anticipated. This is

due to the extreme cold which reduces the

PM-3’s flexibility and consequently, the

amount of bending and stress which the fas-

tener will withstand.

Despite the similarity of the PM-3’s to stan-

dard ty-raps, the use of commercially available

single loop ty-raps is not recommended for

installing Protectowire Linear Heat Detector.

Standard ty-raps are easily overtightened dur-

ing installation which prevents the wire from

expanding and contracting during tempera-

ture changes. This type of stress will eventual-

ly cause insulation damage to the Detector

resulting in unwanted alarms.

Messenger Wire

Messenger wire (a Protectowire innovation),

is available with any model Detector on spe-

cial order. It consists of high tensile strength

stainless steel wire, which is wound around

the Detector at the rate of approximately one

turn per foot (.3 m). It is a carrier or support

wire which is designed to simplify the instal-

lation of the Detector in areas where mount-

ing is difficult due to the lack of appropriate

support structures or mounting surfaces.

When using messenger wire to support the

Detector, turnbuckles and eyebolts must be

employed at each end of a straight run to place

tension on the support wire. The maximum

Detector run length between turnbuckles

should not exceed 250 feet (76 m) and the

wire must also be supported with approved

intermediate fasteners at intervals typically

ranging from 15 (4.5 m) to 20 feet (6.0 m). The

final spacing of intermediate fasteners is largely

determined by each individual application,

however, spacing should never exceed 50 feet

(15 m) as excessive sag will result. Outdoor

messenger wire installations present additional

challenges due to environmental factors such as

snow loads, ice build-up or wind. Increased

detector support must be provided by using

additional intermediate fasteners with closer

spacing in all outdoor installations.

The summary list of those fasteners contained

in this section of the manual, are suitable for

use in a wide range of applications and are all

Figure 14

MESSENGER DETAIL

RECOMMENDED FOR USE ON HIGH CEILINGS IN LARGE OPEN AREAS

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 32 33

Komentarze do niniejszej Instrukcji

Brak uwag

Protectowire 2000 FireSystem Instrukcja Użytkownika Strona 18

Komentarze do niniejszej Instrukcji

Powiązane produkty i podręczniki dla Systemy kontroli dostępu bezpieczeństwa Protectowire 2000 FireSystem