Potable Water and Space Heating

CAUTION: When this heater is used for both potable water and space heating, observe the following to ensure proper operation.

1.All piping materials and components connected to the water heater for the space heating application shall be suitable for use with potable water.

2.Toxic chemicals, such as used for boiler treatment, shall not be introduced into the potable water used for space heating.

3.If the heater will be used to supply potable water, it shall not be connected to any heating system or components previously used with a non-potable water heating appliance.

TANK SENSOR

Fig. 13: Single Domestic Hot Water Heater and Storage

Tank

4.When the system requires water for space heating at temperatures higher than 140°F, a means such as a mixing valve shall be installed to temper the water in order to reduce scald hazard potential.

Pool Heating

CAUTION: Power to the heater should be interlocked with the main system pump to make sure the heater does not fire without the main system pump in operation. Improper flow control can damage the heater. Uncontrolled flow (too high) or restricted flow (too low) can seriously damage the heater. Follow these instructions to make sure your heater is properly installed.

The Hi Delta pool heater is equipped with an external pump and bypass arrangement as standard equip- ment. This arrangement blends outlet water with the inlet water to increase the inlet water temperature, thereby reducing the likelihood of condensation form- ing on the heat exchanger. The pump also serves to circulate water through the heater from the main sys- tem piping.

To complete the installation of the pool heater, the pool thermostat needs to be installed in the main return wa- ter line, upstream of the heater. This will ensure that the heater will be energized at the right time. If the main water line is too far away from the heater and the capillary bulb will not reach it, locate the pool thermo- stat adjacent to the main line and run wires back to the heater.

Model

Soft (0-4 grains per gallon)

Medium (5-15 grains per gallon)

Hard* (16-25 grains per gallon)

No.

∆T

gpm

∆P

MTS

SHL

∆T

gpm

∆P

MTS

SHL

∆T

gpm

∆P

MTS

SHL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

302B

13

40

2.0

2

5.1

10

52

3.3

2

8.3

7

74

6.6

2

16.3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

402B

17

40

2.0

2

5.1

13

52

3.4

2

8.4

9

74

6.8

2

16.4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

502B

21

40

2.1

2

5.2

16

52

3.5

2

8.6

12

73

6.9

2

16.3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

652B

28

40

2.2

2

5.3

20

55

4.1

2

9.7

15

72

7.0

2

16.2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

752B

30

42

2.6

2

6.0

17

73

7.5

2

16.9

14

90

11.3

2

25.1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

902B

30

51

3.9

2

8.7

21

73

7.8

2

17.2

17

90

11.7

2

25.5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

∆T = Temperature rise, °F

∆P = Pressure drop through heat exchanger, ft

SHL = System head loss, ft. Includes 50 eq ft of tubing each way (total 100 eq ft). gpm = Gallons per minute, flow rate

MTS = Minimum tubing size

*Must utilize optional cupro-nickel tubes. If over 25 grains per gallon, a water softener/treatment system must be utilized.

Caution: For scale free operation with "Hard Water" (16-25 grains per gallon of total hardness), the operating control must NOT be set higher than 130 °F. For higher than 130 ° Foperation, a water softener/treatment system must be utilized.

Table I: Domestic Water Heater Flow Rate Requirements

18

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Raypak 902B, 302B manual Potable Water and Space Heating, Pool Heating
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302B, 902B specifications

Raypak is a prominent name in the heating industry, particularly known for its advanced technology and robust design in residential and commercial heating solutions. Two of their notable models, the Raypak 302B and 402B, exemplify innovation and efficiency in hydronic heating systems, designed to meet diverse needs while ensuring optimal performance.

The Raypak 302B and 402B are high-efficiency boilers that utilize gas-fueled systems. The 302B model has a heating capacity of 302,000 BTU/h, while the 402B boasts a maximum capacity of 402,000 BTU/h. This range of heating output makes these models suitable for a variety of applications, from residential heating needs to larger commercial spaces that require a reliable heat source.

One of the standout features of the Raypak 302B and 402B is their use of fire-tube heat exchanger technology. This design promotes efficient heat transfer and allows for lower emissions, thus minimizing the environmental impact. The fire-tube design also contributes to a longer lifespan and reduced maintenance costs, making these boilers a cost-effective solution over time.

Equipped with advanced control systems, the Raypak 302B and 402B ensure precise temperature regulation and improved energy usage. The digital display provides real-time feedback and diagnostics, enhancing user experience and simplifying troubleshooting. These models are also compatible with various building management systems, providing users with versatility in integration to optimize building performance.

In addition to their technological advancements, these boilers are designed with user safety and convenience in mind. They include features such as built-in safety controls, easy access for service and maintenance, and a compact footprint to fit into tight spaces. Their robust construction ensures durability, which is crucial for systems that operate under high demand.

Moreover, both models have been engineered to succeed in various climates, making them reliable choices for users in diverse geographical locations. With their energy-efficient operation, reliable performance, and advanced features, the Raypak 302B and 402B embody quality and innovation in the heating market, ensuring comfortable environments while lowering energy costs and environmental footprints.
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