6.Perform leakage test on gas valves. (See Fig. 48.)

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.”

8.Inspect and clean burner using shop air.

As Required

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

2.Check drip leg and gas strainers.

3.Check flame failure detection system. (See “Post Start-Up Check,” page 45.)

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

5.Check flame signal strength. (Flame signal should be greater than 1 microampere as measured at the 2 pins on the upper left corner of the ignition control).

6.Check firing rate control by checking the manifold pressure. (See “Manifold Check” on page 43.)

7.Test safety/safety relief valves in accordance with ASME Heater and Pressure Vessel Code Section IV.

Filter Maintenance

NOTE: Use Raypak replacement filters, kit number 012552F (12”X12”) for models 503-1003 and kit number 012553F (16”X16”) for models 1253-2003.

•Inspect quarterly

•Replace when tracking pressure exceeds -0.5 in. WC at 100% fan speed, except for models 1003, 1753 and 2003, which need to be replaced when tracking pressure exceeds -0.7 in. WC at 100% fan speed.

Filter Replacement

1.Remove the filter box cover by loosening and removing the two wing nuts holding it in place.

Fig. 49: Remove the Air Filter Box Cover

2.Remove the filter by lifting it straight up and out of the slot in the filter box.

Fig. 50: Remove the Air Filter

3.Reverse steps 1 and 2 to install the new filter. Use Raypak replacement filters, kit number 012552F (12”X12”) for models 503-1103 and kit number 012553F (16”X16”) for models 1253-2003.

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Raypak 503-2003 manual Filter Maintenance, Filter Replacement, As Required
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503-2003 specifications

The Raypak 503-2003 is a notable entry in the world of water heating solutions, renowned for its efficiency and reliability in both residential and commercial settings. This model is designed to provide exceptional performance while maintaining ease of use and minimization of environmental impact.

One of the standout features of the Raypak 503-2003 is its advanced heating technology. The unit utilizes a durable, copper heat exchanger which ensures quick and efficient heating of water. This heat exchanger is known for its ability to transfer heat effectively, leading to reduced energy consumption and lower utility bills. The design also allows for a seamless operation, ensuring that the system heats water swiftly without sacrificing performance.

In addition to its efficient heating capabilities, the Raypak 503-2003 is equipped with innovative controls. The digital control panel allows users to easily set and adjust the desired water temperature. This feature provides a level of convenience that simplifies operation while enhancing user experience. Furthermore, the smart technology employed in the unit ensures that it operates within optimal parameters, avoiding unnecessary energy expenditure.

Durability is another hallmark of the Raypak 503-2003. Built with heavy-duty components, this water heating solution is designed to withstand the rigors of continuous use. The rugged construction ensures longevity, making it a cost-effective investment for homeowners and businesses alike. Moreover, the unit is designed to be resistant to corrosion and wear, further extending its lifespan and reliability.

The energy efficiency of the Raypak 503-2003 is a crucial characteristic that sets it apart from competitors. Rated with a high efficiency score, this model contributes to lower emissions and is environmentally friendly. It adheres to various energy standards, making it a suitable choice for those looking to reduce their carbon footprint while enjoying reliable water heating.

Noise reduction is another important feature of the Raypak 503-2003. Designed with quiet operation in mind, the unit operates with minimal noise pollution, allowing for a pleasant environment in both residential and commercial spaces.

In summary, the Raypak 503-2003 combines advanced heating technology, user-friendly controls, durability, and energy efficiency into a robust water heating system. This makes it an excellent choice for those in need of dependable and sustainable heating solutions. Whether for daily home use or for larger commercial applications, the Raypak 503-2003 stands out as a leader in its class.
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