Tyco Fire Protection Products

Model Royal Flush II - Concealed Pendent Sprinklers

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The TYCO Series RFII 5.6 K-factor, “Royal Flush II” Concealed Pendent Sprinklers Quick Response (3-mm bulb) and Standard Response (5-mm bulb), are decorative sprinklers featuring a flat cover plate designed to conceal the sprinkler. These sprinklers are optimal for architecturally sensitive areas such as hotel lobbies, office buildings, churches, and restaurants.

Features:

  • Light hazard/Ordinary hazard
  • Concealed in an enclosed escutcheon plate with flat cover for use in those applications where aesthetics is a primary consideration
  • Separable, two-piece design of the mounting cup and cover plate allows installation of the sprinklers and pressure testing of the fire protection system prior to installation of a suspended ceiling or application of the finish coating to a fixed ceiling
  • Internally threaded closure with 1/2' (12,7 mm) of adjustment
  • Available with optional dust and air seal

Hazard: Light Hazard/Ordinary Hazard,All
Temperature: 155, 200
Thread: 1/2'
Approval: UL, C-UL, NYC, VdS, LPCB, FM
Response: Quick Response,Standard Response
SIN Numbers: TY3531,TY3551
Wrench: RFII

Each sprinkler includes a Cover Plate/ Retainer Assembly and a Sprinkler/ Support Cup Assembly. The separable, two-piece assembly design provides the following benefits:

  • Allows installation of the sprinklers and pressure testing of the fire protection system prior to installation of a suspended ceiling or application of the finish coating to a fixed ceiling.
  • Permits the removal of suspended ceiling panels for access to building service equipment without having to first shut down the fire protection system and remove sprinklers.
  • Provides for 1/2 inch (12,7 mm) of vertical adjustment to allow a measure of flexibility in determining the length of fixed piping to cut for the sprinkler drops.

The Series RFII Sprinklers are shipped with a Disposable Protective Cap. The Protective Cap is temporarily removed during installation and replaced to help protect the sprinkler during ceiling installation or finish. The tip of the Protective Cap can be used to mark the center of the ceiling hole into plaster board or ceiling tiles by gently pushing the ceiling product against the Protective Cap. When ceiling installation is complete, the Protective Cap is removed and the Cover Plate/Retainer Assembly is installed.

As an option, the Series RFII Standard Response (5-mm bulb) “Royal Flush II” Concealed Pendent Sprinklers can be fitted with a silicone Air and Dust Seal. (Refer to Figure 5.) The Air and Dust Seal is intended for sensitive areas where it is desirable to prevent air and dust from the area above the ceiling to pass through the cover plate.

Sprinkler Identification Number (SIN)
TY3531 — 3 mm bulb
TY3551 — 5 mm bulb

Sprinkler Approvals
Approvals apply only to the service conditions indicated in the Design Criteria section.

  • TY3531 (3-mm Bulb) is UL Listed, C-UL Listed, VdS Approved (Certificate No. G4090007), and NYC Approved (MEA 353-01-E) as Quick Response.
  • TY3531 (3-mm Bulb) is FM and LPCB Approved (Ref. No. 094a/10) Approved as Standard Response. Factory Mutual and LPCB do not approve any concealed sprinklers for quick response.
  • TY3551 (5-mm Bulb) is UL Listed, C-UL Listed, FM Approved, LPCB Approved (Ref. No. 094a/9), and NYC Approved (MEA 353-01-E) as Standard Response.

Approvals for Air and Dust Seal
UL and C-UL Listed for use with the RFII Standard Response Concealed Sprinkler (TY3551).

Maximum Working Pressure
Maximum 250 psi (17,3 bar) by UL, C-UL, and NYC
Maximum 175 psi (12,1 bar) by FM, VdS, and LPCB

Temperature Rating
155°F (68°C) Sprinkler with 139°F (59°C) Plate
200°F (93°C) Sprinkler with 165°F (74°C) Plate

Discharge Coefficient
K= 5.6 GPM/psi1/2 (80,6 LPM/bar1/2)

Adjustment
1/2 inch (12,7 mm)

Physical Characteristics
Frame: Bronze
Support Cup: Chrome Plated Steel
Guide Pins: Stainless Steel
Deflector: Bronze
Compression Screw: Brass
Bulb: Glass
Cap: Bronze or Copper
Sealing Assembly: Beryllium Nickel w/ TEFLON
Cover Plate: Brass
Retainer: Brass
Ejection Spring: Stainless Steel

Design Criteria
The TYCO Series RFII 5.6 K-factor, “Royal Flush II” Concealed Pendent Sprinklers are intended for fire protection systems designed in accordance with the standard installation rules recognized by the applicable Listing or Approval agency; for example, UL Listing is based on NFPA 13 and VdS Approval is based on the CEA 4001.

Operation
When exposed to heat from a fire, the Cover Plate, normally soldered to the Retainer at three points, falls away to expose the Sprinkler/Support Cup Assembly.

The Deflector — supported by the Guide Pins — then drops down to its operational position.

The glass bulb contains a fluid that expands when exposed to heat. When the rated temperature is reached, the fluid expands sufficiently to shatter the glass bulb, activating the sprinkler and allowing water to flow.

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