Weekly

For low-pressure heaters, test low-water cut-off device. (With at least one stage of the appliance on, depress the low water cut-off test button, appliance should shut-off and ignition fault light should come on. Depress reset button to reset).

1.Check igniter. (Resistance reading should be 42- 70 ohms at ambient temperature.)

2.Check flame signal strength. (Flame signal should be greater than 1 microamp).

3.Check flame failure detection system. (See “Post Start-Up Check” on page 48.)

4.Check firing rate control by checking the manifold pressure. (See “Main Burner Adjustment” on page 46.)

5.Make auditory and visual check of main fuel valves.

Monthly

1.Check flue, vent, stack, or outlet dampers.

2.Test fan air pressure. (See “Blower Adjustment” on page 46.)

3.Test high and low gas pressure interlocks (if equipped). (See “Safety Inspection” on page 47.)

Semi-Annually

1.Recalibrate all indicating and recording gauges.

2.Check flame failure detection system components. (See “Pilot Turn-Down Test Procedure,” page 47.)

3.Check firing rate control by checking the manifold pressure. (See “Main Burner Adjustment” on page 46.)

4.Check piping and wiring of all interlocks and shut- off valves.

5.Inspect burners.

Annually

1.Test flame failure detection system and pilot turn- down. (See “Pilot Turn-Down Test Procedure,” page 47.)

2.Test high limit and operating temperature. (See “Post Start-Up Check,” page 48.)

3.Check flame sensors.

4.Conduct a combustion test at full fire. Carbon di- oxide should be 7.5 to 8.5% at full fire for natural gas, and between 9.2 to 9.8% for propane gas; Carbon monoxide should be < 150 ppm).

5.Check coils for 60 cycle hum or buzz. Check for leaks at all valve fittings using a soapy water solu- tion. Test other operating parts of all safety shut-off and control valves and increase or decrease set- tings (depending on the type of control) until the safety circuit opens. Reset to original setting after each device is tested.

6.Perform leakage test on gas valves. (See Fig. 41.)

7.Test air switch in accordance with manufacturer’s instructions. (Turn panel switch to the “On” posi- tion until blower is proven, then turn the switch to “Off”.

As Required

1.Recondition or replace low water cut-off device (if equipped).

2.Check drip leg and gas strainers.

3.Perform flame failure detection and pilot turn- down tests.

4.Test safety/safety relief valves in accordance with ASME Heater and Pressure Vessel Code Sections VI and VII.

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Raypak 302A-902A manual Weekly, Semi-Annually, As Required
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302A-902A specifications

The Raypak 302A-902A is a highly regarded pool and spa heater, known for its efficiency and reliability in delivering warmth to residential and commercial aquatic applications. This heater stands out due to its robust design, advanced technology, and user-friendly features.

One of the key characteristics of the Raypak 302A-902A is its dual fuel capability, which means it can run on either natural gas or propane. This flexibility allows users to choose their preferred fuel type, contributing to operational efficiency and cost-effectiveness. With a BTU output ranging from 302,000 to 902,000, the Raypak heater is capable of quickly heating large volumes of water, making it ideal for pools, spas, and hot tubs.

The heater incorporates advanced technology such as a stainless steel heat exchanger, which not only ensures excellent thermal conductivity but also promotes durability against corrosion. This is especially advantageous in harsh environments, where exposure to chemicals can significantly impact the lifespan of traditional copper heat exchangers. The Raypak 302A-902A's heat exchanger is designed to withstand the rigors of constant use while maintaining high performance levels.

Another prominent feature of the Raypak 302A-902A is its digital display control system, which simplifies the operation and monitoring of the heater. Users can easily set and adjust temperatures, as well as access diagnostic information, all through an intuitive interface. This digital control not only enhances user experience but also aids in the timely maintenance of the unit.

Energy efficiency is another major selling point of the Raypak 302A-902A. The heater is designed with environmentally friendly practices in mind, utilizing a low NOx burner that minimizes harmful emissions. This not only meets environmental regulations but also makes it a greener alternative for heating needs.

In terms of installation, the compact design of the Raypak 302A-902A allows for versatile placement options, whether in a residential backyard or a commercial environment. Its user-friendly installation process ensures that homeowners and businesses alike can enjoy the benefits of heated water with minimal hassle.

Overall, the Raypak 302A-902A is an exemplary choice for anyone seeking a high-quality, efficient, and flexible pool and spa heating solution. Its combination of robust engineering, advanced technology, and user-focused features solidifies its position as a leader in the market, promising effective heating for years to come. Whether for personal enjoyment or commercial use, this heater delivers exceptional performance that meets diverse heating needs.
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