Model RC-1 Retard Chamber For Variable Pressure Wet Pipe Sprinkler Systems 300 psi (20,7 bar)
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Worldwide Contacts Model RC-1 Retard Chamber For Variable Pressure Wet Pipe Sprinkler Systems 300 psi (20,7 bar) General Description The TYCO Model RC-1 Retard Chamber is required in installations that will be subject to pressure variations, as are generally associated with public water supplies, in order to help prevent false alarms. The RC-1 is specifically intended for use as a separately ordered item for the Model AV-1 -300 Alarm Check Valve (TFP910). It can, however, also be used as a separately ordered item for changing out older style Retard Chambers used with the Central Model F/G, Gem Model A, or Star Model E/F Alarm Check Valves. The Model RC-1 Retarding Chamber is a re-designation for the Gem Model F211 for use with Gem Model F20/ F200/F2001 Alarm Check Valves, as well as the Star Model S310 for use with Star Model S30/S300/S3001 Alarm Check Valves. The Model RC-1 Retard Chamber described herein must be installed and maintained in compliance with this document, as well as with the applicable standards of the NATIONAL FIRE PROTECTION ASSOCIATION, (NFPA), in addition to the standards of any other authorities having jurisdiction. Failure to do so may impair the integrity of this device. The owner is responsible for maintaining their fire protection system and devices in proper operating condition. Contact the installing contractor or product manufacturer with any questions. Technical Data Approvals UL and ULC Listed FM Approved for use with the Model AV-1-300 Alarm Check Valves. UL and ULC Listed FM, LPCB, and VdS Approved for use with the following Alarm Check Valves: • Model AV-1-175 • Gem Model F20/F200/F2001 • Gem Model A • Star Model S30/S300/S3001 Working Water Pressure 300 psi (20,7 bar) Construction The Model RC-1 Retard Chamber shown in Figure 1 is cast iron, and a 3/4 in. x 1/2 in. x 3/4 in. Tee is provided at the outlet (top) for connection of a pressure alarm switch and/or water motor alarm. The Restriction Assembly shown in Figure 2 is provided with the AV-1-300 trim or ordered separately for retrofitting other valves. This assembly is comprised of brass restrictions assembled to a cast iron or malleable iron threaded tee fitting. The screen is stainless steel. Operation When water flows steadily into the sprinkler system due to sprinkler operation, the Waterway Clapper in the Alarm Check Valve opens as shown in Figure 3. Water is then permitted to flow into the centrally located groove in the Seat Ring and out through the Alarm Port towards the Restriction Assembly. See Figure 2. When the flow through the Inlet Restriction of the Restriction Assembly exceeds the flow out through the Outlet Restriction, the Retard Chamber begins to fill. Subsequently, the Water Motor Alarm and/or the Pressure Alarm Switch activate. The alarms continue to operate as long as the Waterway Clapper remains open. When the Clapper closes as a result of discontinued water flow, water in the alarm lines automatically drains out through the 1/8 in. (3,2 mm) drain orifice in the Restriction Assembly. See Figure 2. In the case of variable pressure systems, a transient surge in supply pressure that is sufficient only to open the Clapper momentarily will not cause a false alarm. The volume of the Retard Chamber is sufficiently large enough that it will not fill to operate the connected alarm devices. Any water in the alarm line is then automatically drained, further reducing the possibility of a false alarm due to a successive transient surge in supply pressure. IMPORTANT Refer to Technical Data Sheet TFP2300 for warnings pertaining to regulatory and health information.

TFP920 Page 2 of 4 1/2" NPT WATERFLOW PRESSURE ALARM SWITCH CONNECTION 3/4" NPT WATER MOTOR ALARM CONNECTION SCREEN INLET RESTRICTION FITTING WITH 0.219" (5.6 mm) ORIFICE DRAIN RESTRICTION FITTING WITH 0.125" (3.2 mm) ORIFICE FIGURE 1 MODEL RC-1 RETARD CHAMBER FIGURE 2 RESTRICTION ASSEMBLY WATERFLOW PRESSURE ALARM SWITCH ONCE RETARD CHAMBER OVERFLOWS, WATERFLOW PRESSURE ALARM SWITCH AND WATER MOTOR ALARM ACTUATE RETARD CHAMBER WATERFLOW TO WATER MOTOR ALARM 7/32" (5,6 mm) ORIFICE INLET RESTRICTION ASSEMBLY UPON SPRINKLER FLOW, WATERWAY CLAPPER OPENS WATERFLOW TO SYSTEM SYSTEM PRESSURE GAUGE...

Installation The TYCO Model RC-1 Retard Chamber must be installed in accordance with the specific instructions provided with the TYCO Model AV-1 -300 Alarm Check Valve (TFP910). The standard trim for these Alarm Check Valves includes all necessary components including the Restriction Assembly shown in Figure 2. • In the case of retrofitting Central Model F/G Alarm Check Valves, see Figure 4. • In the case of retrofitting Gem Model A Alarm Check Valves, see Figure 5. • In the case of retrofitting Star Model E/F Alarm Check Valves, see Figures 6 and 7. • Apply pipe thread sealant sparingly to...

Limited Warranty For warranty terms and conditions, visit www.tyco-fire.com. Ordering Procedure RC-1 Specify: Model RC-1 Retard Chamber with galvanized steel fittings, P/N 52-211-1-002 Separately Ordered Parts for Retrofitting Other Valves When retrofitting according to Figures 4, 5, 6, or 7, the Restriction Assembly, Y-Strainer, and associated pipe nipples and fittings must be ordered separately to complete installation. Pipe nipples and fittings can be acquired from sources other than Johnson Controls. NIPPLES AND FITTINGS 1 NO. DESCRIPTION QTY. RESTRICTION 2 ASSEMBLY P/N 92-210-2-005...