SECTION E: HYDRONIC HEATING PIPING

PUMP SELECTION

In order to ensure proper performance of your boiler system, you must install a properly sized pump. Raypak recommends using a 20°F Delta T as design Delta T. (Delta T is the temperature difference between the inlet and outlet water when the heater is firing at full rate). If a Delta T larger than 20°F is necessary, see Table D-1 for minimum flow rate requirements.

PRESSURE DROP IN FEET OF HEAD

FEEDWATER REGULATOR

Raypak recommends that a feedwater regulator be installed and set at 12 PSIG minimum pressure at the highest point of system. Install a check valve or back flow device upstream of the regulator, with a manual shut off valve as required by local codes.

PIPING - HEATING BOILERS

All high points should be vented. Purge valves and a bypass valve should be installed. A boiler installed above radiation level must be provided with a low water cut-off device. The boiler, when used in connection with a refrigeration system, must be installed so the chilled medium is piped in parallel with the boiler with appropriate valves to prevent the chilled medium from entering the boiler.

The boiler piping system of a hot water heating boiler connected to heating coils located in air handling units where they may be exposed to circulating refrigerated air, must be equipped with flow control valves or other automatic means to prevent gravity circulation of the boiler water during the cooling cycle. It is highly recommended that the piping be insulated.

AIR-SEPARATION/EXPANSION TANK

All boilers should be equipped with a properly sized expansion tank and air separator fitting as shown in the following diagrams.

THREE-WAY VALVES

Valves designed to blend water temperatures or reduce water circulation through the boiler should not be used. Raypak boilers are high recovery low mass boilers not subject to thermal shock. Raypak offers a full line of electric sequencers that produce direct reset of boiler water temperature. Refer to the Controls Section in our Complete Catalog.

Table D-1

* Flow switch (when used) will not activate at less than 12 gpm. NOTE: Basis for minimum flow - 10 gpm or 40° Delta T

maximum flow - 44 gpm, except for 1.25” header.

14

Page 13 Page 15
Page 14
Image 14
Raypak 122-322 installation instructions Section E Hydronic Heating Piping
Page 13 Page 15

122-322 specifications

Raypak 122-322 is a cutting-edge pool and spa heater designed for optimal performance and efficiency. Known for its robust construction and reliable heating capabilities, this heater has become a preferred choice among pool owners.

One of the standout features of the Raypak 122-322 is its advanced copper fin tube heat exchanger. This innovative technology enhances the heater's efficiency by maximizing heat transfer while minimizing energy consumption. By efficiently circulating the water through the heat exchanger, the Raypak 122-322 quickly raises the temperature, allowing for an enjoyable swimming experience regardless of the weather.

The heater is equipped with a digital control system that allows for precise temperature adjustments. This user-friendly interface makes it easy to set and maintain the desired water temperature, promoting user convenience. The digital controls also provide diagnostic features, which simplify troubleshooting and maintenance, ensuring the heater operates smoothly for years to come.

Safety is a crucial aspect of the Raypak 122-322. It comes with a series of safety features, including a flame rollout switch, high limit switch, and a pressure switch that ensures the unit operates safely under various conditions. This focus on safety provides peace of mind for users, knowing that their heating system is designed with protective measures in place.

The Raypak 122-322 is environmentally friendly, designed to use less energy compared to conventional heating systems. Its efficient performance not only reduces operational costs but also lessens the overall environmental impact, making it a responsible choice for conscious consumers.

With a compact design, the Raypak 122-322 can fit easily into various installation spaces, making it versatile for numerous residential or commercial settings. Additionally, the unit is built with durable materials resistant to corrosion and weather conditions, ensuring longevity and minimal maintenance requirements.

Overall, the Raypak 122-322 stands out in the market due to its advanced features, safety mechanisms, energy efficiency, and ease of use. It exemplifies a perfect blend of innovation and reliability, making it an exceptional option for anyone looking to enhance their pool or spa experience.
Top Page Image Contents