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TFP510 Page 5 of 8 gagement of the inlet pipe threads with Deep Escutcheon, hold the outer consequent leakage. Installation piece in contact with the mounting sur- Branch, cross, and feedmain piping The Series DS -1 Dry Type Sprinklers piece (ceiling), approximately and then rotate the inner Sprinklers and sub- rY YP P piece approximately 1/4 turn with re- connected to Dry P must be installed in accordance with spect to the outer piece, to hold the ject to freezing temperatures must be the following instructions: Deep Escutcheon firmly together. pitched for drainage in accordance with the minimum requirements of the NOTES National Fire Protection Association The Series DS -1 must only be installed Care and for dry pipe sprinkler systems. in fittings that meet the requirements ■� When Dry Sprinklers are to be used in of the Design Criteria section. Maintenance wet pipe sprinkler systems protecting Refer to the Design Criteria section for The Series DS -1 Dry Type Sprinklers areas subject to freezing temperatures other important requirements regard- must be maintained and serviced in (e.g., sprinkler drops into freezers), ing piping design and sealing of the accordance with the following instruc- consideration must be given to the ap- clearance space around the Sprinkler tions: propriate length of the sprinkler that Casing. will prevent freezing of the water in the NOTES connecting pipes due to conduction. Do not install any bulb type sprinkler if When the temperature surrounding the bulb is cracked or there is a loss of Absence of the outer piece of an es- the wet pipe sprinkler system is main- liquid from the bulb. With the sprinkler cutcheon, which is used to cover a tained at a minimum temperature of held horizontally, a small air bubble clearance hole, may delay the time to 40 °F /4 °C, the following are the mini- should be present. The diameter of the sprinkler operation in a fire situation. mum recommended lengths between air bubble is approximately 1/16 inch Before closing a fire protection system the face of the sprinkler fitting and the (1,6 mm) for the 135 °F /57 °C rating to main control valve for maintenance outside surface of the protected area 1/8 inch (3,2 mm) for the 286 °F /141 °C work on the fire protection system that (i.e., length exposed to minimum am- rating. it controls, permission to shut down bient of 40 °F /4 °C): A leak tight 1 inch NPT sprinkler joint the affected fire protection systems • 12 inches (300 mm) when the tem- should be obtained with a torque of 20 must be obtained from the proper . perature within the protected area to 30 ft.lbs. (26,8 to 40,2 Nm). Higher authorities and all personnel who may is - 20 °F / -29 °C levels of torque may distort the sprin- be affected by this action must be no- kler inlet with consequent leakage or tilled. • 18 inches (450 mm) when the tem- impairment of the sprinkler. A Vent Hole is provided in the Bulb perature within the protected area p is - 40 °F / -40 °C Do not attempt to compensate for in- Seat (Ref. Figure 1) to indicate if the sufficient adjustment in an Escutcheon Dry Sprinkler is remaining dry. Evi- • 24 inches (600 mm) when the tem- Plate by under- or over- tightening the dence of leakage from the Vent Hole perature within the protected area Sprinkler. Readjust the position of the is an indication that there may be is -60°F/-51°C sprinkler fitting to suit. weepage past the Inlet seal and that For protected area temperatures be- S tep 1. P endent sprinklers must be the sprinkler needs to be removed for tween those given above, the minimum installed only in the pendent position, determining the cause of leakage (e.g. recommended length from the face of an improper installation or an ice plug) recom . rec ra ting to the outside h from the the pro- and upright sprinklers must be in- The fire protection system control tected area may be determined by in- stalled only in the upright position. The valve must be closed and the system terpolating between the indicated val- deflector of a pendent or upright sprin drained before removing the sprinkler. kler is to be parallel to the ceiling. ues. Sprinklers that are found to be leaking Horizontal sidewall sprinklers are to be or exhibiting visible signs of corrosion NOTE installed in the horizontal position with must be replaced. When Dry Sprinklers penetrate a ceil- their centerline of waterway perpen- ing or wall into an area subject to freez- dicular to the back wall and parallel to Automatic sprinklers must never be ing, the clearance space around the the ceiling. The word `TOP" on the De- painted, plated, coated, or otherwise Sprinkler Casing must be completely flector is to face towards the ceiling. altered after leaving the factory. Modi- sealed in order to prevent the leakage fied sprinklers must be replaced. of moist air into the freezing area Step 2 . With pipe thread sealant ap Sprinklers that have been exposed to which might result in the formation of plied to the inlet threads hand tighten corrosive products of combustion, but condensate around the Frame, Deflec the sprinkler into the sprinkler fitting have not operated, should be com- tor, Bulb Seat, or Bulb. Failure to pre- Step 3. Wrench tighten the sprinkler by pletely cleaned by wiping the sprinkler vent the formation of condensate could wrenching on the Casing with a pipe with a cloth or by brushing it with a soft result in the build -up of ice around the wrench whenever the casing is readily bristle brush. releasing components. This could re- accessible. Otherwise, use a W -Type 7 Care must be exercised to avoid dam - sult an inadvertent operation of the Sprinkler Wrench (Ref. Figure 2). The age - before, during, and after instal - sprinkler or impaired operation due to wrench recess of the W -Type 7 is to be lation. Sprinklers damaged by drop - reduced thermal sensitivity. applied to the sprinkler wrench flats ping, striking, wrench twist/slippage, (Ref. Figure 2). or the like, must be replaced. Also, Step 4. After the ceiling /wall has been replace any sprinkler that has a installed /finished, slide on the outer cracked bulb or that has lost liquid from piece of the Escutcheon until it comes its bulb (Ref. Installation Section). in contact with the ceiling /wall. Do not The owner is responsible for the in- lift the ceiling panel out of its normal spection, testing, and maintenance of position. their fire protection system and de- In the case of the outer piece of the vices in compliance with this docu-