Hydrostatic Test

Unlike many other types of heaters, Raypak heaters do not require hydrostatic testing prior to being placed in operation. The heat exchanger has already been factory-tested and is rated for 160 PSI maximum oper- ating pressure. However, Raypak does recommend hydrostatically testing the piping connections to the heater and the rest of the system prior to operation. This is particularly true for hydronic systems using expensive glycol-based antifreeze. Raypak recom- mends conducting the hydrostatic test before connecting gas piping or electrical supply.

Leaks must be repaired at once to prevent damage to the heater. NEVER use petroleum-based stop-leak compounds.

1.Connect fill water supply. Fill heater with water (be sure bleed valve is open). When water flows from bleed valve, shut off water. Close bleed valve. Carefully fill the rest of the system, being sure to eliminate any entrapped air by using high point vents. Close feed valve. Test at standard operating pressure for at least 24 hours.

2.Make sure constant gauge pressure has been maintained throughout test.

3.Check for leaks. Repair if found.

Low Temperature System

Heater requires minimum inlet temperature of 105°F. Consult the following sections for piping details.

Temperature & Pressure Gauge

The temperature and pressure gauge is factory- mounted in the in/out header.

Hydronic Heating

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 F 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.

Model

10°F ΔT

20°F ΔT

30°F ΔT

 

Min. Flow

 

Max. Flow

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No.

gpm

ΔP (ft)

gpm

ΔP (ft)

gpm

ΔP (ft)

gpm

 

ΔP (ft)

 

ΔT

gpm

ΔP (ft)

 

ΔT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

122

20

2.5

10

<1.0

 

 

10*

 

<1.0

 

20

30

5.3

 

7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

162

27

4.5

13

1.10

 

 

10

 

<1.0

 

27

30

5.4

 

9

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

202

34

7.2

17

1.85

11

<1.0

10

 

<1.0

 

34

30

5.5

 

11

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

242

40

10.0

20

2.65

14

1.3

10

 

<1.0

 

40

44

11.8

 

9

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

322

 

 

27

4.70

18

2.2

14

 

1.4

 

40

44

12.2

 

12

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

*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.

Table F: Heater Rates of Flow and Pressure Drops

13

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Raypak 122-322 manual Hydronic Heating
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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.
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