Fig. 16: Connections

Gas Supply Connection

CAUTION: The boiler and its manual shutoff valve must be disconnected from the gas supply during any pressure testing of the gas supply system at test pressures in excess of 1/2 PSIG (3.45 kPa).

The boiler must be isolated from the gas supply piping system by closing the manual shutoff valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 1/2 PSIG. Relieve test pressure in the gas supply line before reconnect- ing the boiler and its manual shut off valve to the gas supply line. FAILURE TO FOLLOW THIS PROCE- DURE MAY DAMAGE THE GAS VALVES. Over pressurized gas valves are not covered by warranty. The boiler and its gas connections shall be leak tested before placing the appliance in operation. Use soapy water for leak test: DO NOT use open flame.

CAUTION: Do not use Teflon tape on gas line pipe thread. A pipe compound rated for use with Propane gas systems is recommended. Apply sparingly only on male pipe ends, leaving the 2 end threads bare.

CAUTION: Support gas supply piping with hangers, not by the boiler or its accessories. Ensure the gas piping is protected from physical damage and freezing where required.

Gas Supply Pressure

A minimum of 7 in. WC and a maximum of 10.5 in. WC upstream gas pressure is required under load and no load conditions for natural gas. A minimum of 12 in. WC and a maximum of 13 in. WC is required for propane gas. The gas pressure regulator supplied is for low pressure service. If upstream pressure exceeds 14 in. WC, an intermediate gas pressure reg- ulator, of the dead lockup type, must be installed.

NOTE: The supply gas pressure must not fluctuate by more than +/- 1.0 in. WC. For fluctuating gas sup- ply contact the factory.

When connecting additional gas utilization equipment to the gas piping system, the existing piping must be checked to determine if it has adequate capacity.

Model

1-1/2”

2” NPT

2-1/2”

3” NPT

NPT

NPT

 

 

 

 

 

 

 

 

751

65

200

N/A

N/A

 

 

 

 

 

1001

35

125

200

N/A

 

 

 

 

 

1501

15

60

125

225

 

 

 

 

 

Maximum equivalent pipe length.

Natural gas 100 BTU/FT3 .60 specific gravity @.5 in. WC pressure drop.

Table I: Gas Pipe Sizing

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Raypak 751 manual Gas Supply Connection, Gas Supply Pressure
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751 specifications

The Raypak 751 is a high-efficiency, gas-powered pool and spa heater renowned for its advanced technology and durability. Designed with innovative features, the Raypak 751 prioritizes user convenience and energy efficiency, making it an excellent choice for pool owners seeking reliable heating solutions.

One of the standout features of the Raypak 751 is its robust heat exchanger, built from the finest materials to ensure long-lasting performance. This model utilizes a copper heat exchanger which is highly conductive, allowing for rapid heating of water and maintenance of consistent temperatures. Its design also minimizes scale buildup, extending the longevity of the heater.

The Raypak 751 is equipped with advanced digital controls that make it user-friendly. The intuitive interface allows for precise temperature settings and monitoring, ensuring optimal performance. Additionally, the heater features a temperature display that provides real-time updates, giving users peace of mind when adjusting their pool's environment.

Energy efficiency is a hallmark of the Raypak 751, thanks to its low NOx burner technology. This feature meets stringent environmental regulations while also lowering operational costs. By optimizing fuel usage, the heater not only contributes to reducing greenhouse gas emissions but also provides a more economical heating option for pool and spa owners.

The rugged construction of the Raypak 751 is another characteristic that sets it apart. Its heavy-duty cabinet is designed to withstand the elements, ensuring reliable operation in various weather conditions. The heater is available in multiple configurations, including both natural gas and propane options, allowing for flexible installation depending on the user's needs.

Furthermore, the Raypak 751 incorporates safety features, such as an integrated pressure switch that prevents operation when water flow is insufficient. This protects both the heater and associated plumbing from damage due to overheating or dry firing.

In summary, the Raypak 751 combines cutting-edge technology with user-centric features to deliver a superior pool heating experience. Its high-efficiency performance, durable construction, and advanced safety features make it a top choice for anyone looking to enhance their pool or spa. Whether for residential or commercial applications, the Raypak 751 ensures warmth and comfort, enriching the overall swimming experience.
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