Raypak P-R185B To P-R405B, C-R185B To P-R405B, P-R185BL To P-R405BL, C-R185BL To C-R405BL, RP2100

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INTERNAL AUTOMATIC BY-PASS VALVEPRESSURE RELIEF VALVE INSTALLATION

In addition to the Unitherm Governor, a built-in automatic by-pass valve is provided in the in/out header. While the Unitherm Governor responds to the changes in water temperature in the heater, the internal by-pass valve automatically responds to changes in water pressure in the piping system. Proper amount of water flow is maintained through the heater under varying pressures dictated by the conditions of the pump and filter.

BYPASS DISC

SPRING

BYPASS

BODY

To conform to local building codes, it may be necessary to install a pressure relief valve. A 3/4" pressure relief valve having a capacity equal to BTU/HR output of the model to be installed is recommended for this heater. The maximum acceptable pressure relief valve setting is 125 psi.

A 3/4" NPT connection is provided in the plastic header forinstallationofapressurereliefvalve. Thevalveshallbe installed in a vertical position. Do not over tighten. Install pressure relief valve hand tight plus 1/2 turn.

POLYMER HEADER

Pressure Relief Valve

PRV Discharge

Connection

EXTERNAL AUXILIARY BYPASS VALVE (Where Required)

An auxiliary bypass valve should be used when flow rates exceed 125 GPM (usually a high performance pump size larger than two horsepower will exceed this flow rate). This valve is required to complement the function of the automatic bypass valve, particularly when starting the heater in winter or early spring when the spa or pool temperature is down below 50°F. It also serves to eliminate needless pressure drop through the heater and accompanying reduction in the flow rate to the spa jets, etc.

From Heater

To Heater

Fig.#2003

Inlet/Outlet Header

Fig. #2004

A 3/4" NPT connection is provided in the header for installation of a pressure relief valve. The valve shall be installed in a vertical position.

ASME HEADER

(Cast Iron)Pressure Relief

Valve

PRV Discharge

Connection

To Pool

From Pool

AUXILIARYBYPASS VALVE

 

(DO NOT USE GATE VALVE)

Fig. # 8150.0ss

AUXILIARY BYPASS VALVE ADJUSTMENT

To set bypass: With clean filter, adjustment is made by feeling the inlet and outlet pipes at the heater. Outlet pipes should be slightly warmer than inlet and comfort- able to the touch. If pipe is hot, close bypass; if cold, open bypass.

Inlet/Outlet Header

Fig. # 8095.0

NOTE: To avoid water damage or scalding due to valve operation, drain pipe must be connected to valve outlet and run to a safe place of discharge. Drain pipe must be the same size as the valve discharge connection throughout its entire length and must pitch downward from the valve. No shutoff valve shall be installed between the relief valve and the drain line. Valve lever should be tripped at least once a year to ensure that waterways are clear.

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Contents What to do if YOU Smell GAS Installation and Operating InstructionsPage Contents START-UP Procedures For Your Safety Read Before OperatingBefore START-UP Burners Water Millivolt System Lighting InstructionsTo Turn OFF GAS to Appliance Electronic Ignitions Systems What to do if YOU Smell GASOperating Instructions Water Pressure Switch Maintenance and Care ProceduresAfter START-UP Visual InspectionPool & SPA Water Chemistry Automatic Chlorinators Chemical FeedersCold Weather Operation Winterizing the Pool & SPA Heater General Specifications Receiving EquipmentStandardunit Asme Unit Installation Instructions Outdoorheaters Installations onlyIndoor Heater Outdoor KIT IncludesIndoor KIT Includes Installing the Clips Indoor & Outdoor Kits Securing the TOP Panel Cover Indoor KIT onlySecuring the TOP Panel Cover Outdoor KIT only Installing the TOP Cover Outdoor KIT only Combustion AIR Indoor Units Only Specifications and DimensionsGAS Supply Connections Vent PipingGAS Pressure Adjustment Locations GAS Pressure RegulatorPipe Sizing for GAS Connections Flow Rates Plumbing for Water ConnectionsUnitherm Governor Operation Connections Asme ModelsAuxiliary Bypass Valve Adjustment External Auxiliary Bypass Valve Where RequiredHeat Exchanger Pressure Drop Tables For Asme Models call your factory representative Electrical Wiring Millivolt SystemElectronic Transformer Wiring 120V Wiring 240V WiringIndependently Wiring Diagram Millivolt Units Mechanical Thermostat Wiring Diagram IID Units atmospheric Wiring Diagram IID Units Low NOx General Location of Controlscontrols and Adjustments Control Panel RemovalMillivolt Controls Digital Thermostat Controls Thermostat Control OperationFahrenheit vs Centigrade Diagnostics Reading a FaultDisplay Definition Remote Control Installation and Operation Activating the RemoteRemote Operation Wire Remote Control On-Off Remote Control WiringFlame ROLL-OUT Safety Switch Pressure SwitchPilot Safety Millivolt Pilot Safety ElectronicBurner Drawer Removal Pilot Removal and CleaningGAS Valve Removal Main Burner and Orifice RemovalDesootingprocedure TubecleaningprocedureImmersion Well Replacement Unitherm Governor U.G. ReplacementBurneradjustment START-UP ProceduresFlame ROLL-OUT Safety Switch OperationCombustion FAN Removal Pilot RemovalMechanicalforqualifiedservicepersonnelonly Trouble Shooting GuideRaypak Pool or SPA Heater Electrical Check with MV GAS Valve Electrical Standing Pilot MillivoltFor qualified Technicians only Electrical Electronic Ignition IID TroubleshootingDigital Control Logic Flow Chart Replacement Parts List RAYPAK, INCEastman Avenue Oxnard, CA For Canada Page Pilot Assemblies Page Page Page Page Page

P-R185B To P-R405B, C-R185B To P-R405B, P-R185BL To P-R405BL, C-R185BL To C-R405BL, RP2100 specifications

Raypak offers a comprehensive line of boilers and water heaters, notably the P-R185B to P-R405B and C-R185B to P-R405B series, along with the RP2100 model. These products are engineered for efficiency, reliability, and performance in both residential and commercial applications.

The P-R185B to P-R405B series features a range of input capacities from 185,000 to 405,000 BTU/h, making them suitable for various heating requirements. The P-R series is equipped with Raypak's patented Cupro-Nickel heat exchanger, which offers superior corrosion resistance and extended life in challenging water conditions. These units also utilize a sealed combustion system, allowing for efficient operation and reduced energy consumption by drawing air from outside the building.

The C-R185B to P-R405B boilers are specifically designed for commercial applications where reliability is critical. They incorporate similar features to the standard P-R series and are built to handle higher heating demands, making them ideal for larger facilities. The C-R series models are recognized for their durable construction and advanced control systems, offering precise temperature management and enhanced performance.

In addition to these series, the P-R185BL to P-R405BL and C-R185BL to C-R405BL models feature a low-NOx design to comply with stringent environmental regulations. This means they produce lower nitrogen oxides, making them an environmentally friendly option without sacrificing performance.

The RP2100 is another standout model, known for its robust design and cutting-edge technology. It boasts a high efficiency rating and is equipped with an intuitive digital control system, allowing users to monitor and adjust settings with ease. The RP2100 also features a modulating burner system, which adjusts the flame based on the heating demand, optimizing fuel usage and minimizing operational costs.

All Raypak models are designed with safety in mind, incorporating multiple safety features like thermal shutdowns and pressure relief valves. Their compact dimensions make installation straightforward, and the low maintenance requirements ensure longevity and consistent performance.

In summary, Raypak's P-R185B to P-R405B, C-R185B to P-R405B, P-R185BL to P-R405BL, and RP2100 series represent a commitment to quality and innovation in heating solutions, providing efficient and reliable options for both residential and commercial applications.
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