Engine Ops-Elevated Master Streams PDF

SECTION TOPICS Tiller Master Streams Platform Master Streams SECTION OBJECTIVES Understand the pressure and flows of tiller master streams Understand the pressure and flows of platform master streams Identify the number one indicator of an State the desired supply pressure for adequate master st...

SECTION TOPICS Tiller Master Streams Platform Master Streams SECTION OBJECTIVES Understand the pressure and flows of tiller master streams Understand the pressure and flows of platform master streams Identify the number one indicator of an State the desired supply pressure for adequate master stream platform master stream operations Familiarization of tiller master stream tip sizes Familiarization of platform master stream nozzles Understand how to place tiller master streams in service Understand how to place a platform master stream in service Basic knowledge of tiller master stream supply line considerations Basic knowledge of platform master stream supply line considerations Second Edition 01/31/22 118 OVERVIEW The equipment, capabilities, and flows pertaining to supplying tillers are shown below The tiller operator ultimately dictates the desired pressure and connections to the tiller PRESSURE AND FLOW Tillers either have a set of stacked smoothbore tips or an electronic combination nozzle 150 PSI AT THE TURNTABLE SHOULD BE USED AS A STARTING POINT. This pressure will be relatively close and will allow the operators to get water flowing. From there, the engine pump operator will work with the truck operator to more accurately determine the height of the master stream and the friction loss associated with it The number one indicator of an adequate master stream supply is the overall appearance of the discharge stream itself: o Is the stream compact and tight leaving the discharge orifice? o Does it have good reach? Is more pressure needed to increase reach? o Is the stream turbulent when leaving the discharge orifice? Is less pressure needed to decrease turbulence? Akron Brass SaberMaster Stacked Smooth Bore Tips Effective Reach Flow (GPM) 1250 Nozzle Pressure 80 PSI Tip Size 1 3/ 8 Flow (GPM) 502 598 814 1063 Nozzle Pressure 80 80 80 80 Effective Reach Akron Brass Akromatic (Automatic Nozzle) Second Edition 01/31/22 Flow (GPM) Nozzle Pressure 250-1250 80 PSI* *This automatic nozzle closely maintains 80 PSI nozzle pressure throughout its operating range (250-1250 GPM). The pump discharge pressure required will vary based on friction loss and elevation change. 119 PLACING IN SERVICE Position the supply engine as close as possible to a positive water source (hydrant) Connect the engine into the supply source Place a the engine to the turntable Communicate with the tiller operator; charge the line when the tiller operator calls for it Begin with the turntable valves closed. This allows the engine to supply water to the tiller quickly, even if the tiller is not yet ready to flow water. The operator can then open the valve when they are ready to flow after the aerial is set. The engine pump operator must not charge the supply line until the tiller operator calls for it. Do not just assume the valves are closed and charge the line without the tiller operator calling for it Once water is flowing, Check the pressures and flows as time allows. In master stream operations, water on the fire is more important than 10 PSI too low or too high on the gauge o In situations where limited water supply is available, crews can use a smaller tip size on the stacked tips to maintain an effective stream (reach and penetration) SUPPLY LINE CONSIDERATIONS There are multiple ways for a supply engine and a tiller to set up their supply lines Each shift and operator will have their individual preferences. There are pros and cons to each method. Some common methods are shown below: o Two to the turntable (one on each side of the turntable). This is the preferred method due to how quickly water can be flowed additional water supply o One from the engine into a trifrom the tri-gate to the turntable (one on each side) o One to the intake Standard turntable supply setup -locking Storz adapter get water flowing before backing up Second Edition 01/31/22 120 OVERVIEW The equipment, capabilities, and flows pertaining to supplying platforms are shown below The platform operator ultimately dictates the desired pressure and connections used PRESSURE AND FLOW CFD platforms are equipped with a set of stacked master stream tips and an electronic combination nozzle Since platforms have their own pump, job is to supply the platform like a strong hydrant would. The goal is to provide both adequate pressure and volume to the platform master streams 80 PSI AT THE PLATFORM PUMP INTAKE SHOULD BE USED AS A STARTING POINT. This pressure will allow the platform operator to get water flowing. From there, the engine pump operator will coordinate with the platform operator to more accurately determine the required pressure and volume needed to maximize the platform master streams Stacked Smooth Bore Tips Tip Size 1 3/ 8 Flow (GPM) 502 598 814 1063 Nozzle Pressure 80 80 80 80 Effective Reach Akron Brass Akromatic (Automatic Nozzle) Second Edition 01/31/22 Flow (GPM) Nozzle Pressure 250-1250 80 PSI* *This automatic nozzle closely maintains 80 PSI nozzle pressure throughout its operating range (250-1250 GPM). The pump discharge pressure required will vary based on friction loss and elevation change. 121 PLACING IN SERVICE Place the supply engine as close as possible to a positive water source (hydrant) Connect the engine into the supply source. Do not initiate supply operations with tank water alone. It is not efficient, and it only delays establishing a fixed water supply Place a the engine discharge to the platform master intake valve Communicate with the platform operator and charge the when appropriate o Once the water reaches the platform intake, it is the responsibility of the platform operator to pump their master streams Once water is flowing, auxiliary intake to maximize potential flow Double check the pressures and flows as time allows. In master stream operations, water on the fire is more important than 10 PSI too low or too high on the gauge SUPPLY LINE CONSIDERATIONS Each shift and operator will have their individual preferences for how to supply their platform. However, firefighters must understand the flow capabilities of platform master streams to be able to adequately supply them Due to the platform s ability to flow a set of stacked tips and a combination nozzle at once, it is able to flow upwards of 2000 GPM the available water supply. A s the engine to maximize the volume of water it can deliver to the platform With a strong positive water supply source, the 1500 GPM pumps on CFD engines can deliver over 2000 GPM Second Edition 01/31/22 122