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 connec- tion 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 recom- mended 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 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.

Domestic Hot Water Piping

When designing the water piping system for domestic water applications, water hardness should be consid- ered. Table G indicates the suggested flow rates for soft, medium and hard water. Hardness is specified as grains per gallon.

Model

Soft (0–4 grains per gallon)

Medium (5–15 grains per gallon)

Hard* (16–25** grains per gallon)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ΔT

gpm

ΔP

MTS

SHL

ΔT

gpm

ΔP

MTS

SHL

ΔT

gpm

ΔP

MTS

SHL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

122

10

20

2.5

1-1/4

4.9

8

26

4.0

1-1/4

7.8

7

30

5.3

1-1/4

10.3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

162

14

20

2.5

1-1/4

4.9

11

26

4.1

1-1/4

7.9

9

30

5.4

1-1/4

10.4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

202

17

20

2.6

1-1/4

5.0

13

26

4.2

1-1/4

8.0

11

30

5.5

1-1/4

10.5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

242

21

20

2.6

1-1/2

3.5

16

26

4.3

1-1/2

5.9

9

44

11.8

1-1/2

16.1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

322

27

20

2.7

1-1/2

3.6

20

27

4.8

1-1/2

6.6

12

44

12.2

1-1/2

16.5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ΔT = Temperature rise, °F.

ΔP = Pressure drop through heat exchanger, ft.

SHL = System head loss, ft. (System head loss is based on the heater and tank placed no more than 5 feet apart and 25 feet equivalent length of pipe and fittings.)

gpm = Gallons per minute, flow rate.) MTS = Minimum tubing size.

*Must utilize optional cupro-nickel tubes.

**With Hard Water (16-25 grains per gallon), the operating control must be set no higher than 130F for scale free operation. For operating temper- atures above 130F, a water softener must be utilized.

Table G: Domestic Water Heater Flow Rate Requirements

15

Page 14 Page 16
Page 15
Image 15
Raypak 122-322 manual Domestic Hot Water Piping, Piping-Heating Boilers, Air-Separation/Expansion Tank, Three-Way Valves
Page 14 Page 16

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