Preparation

WARNING: Do not turn on gas at this time.

Check Power Supply

With multi-meter at incoming power, check voltage between:

Hot - Common (≈120 VAC)

Hot - Ground (≈120 VAC) Common - Ground (< 1 VAC)

WARNING: If Common - Ground is > 1 VAC,

STOP: Contact electrician to correct ground failure. Failure to do this may burn out 120V-24V transformer, or may cause other safety control damage or failure.

Attach Manometers to Measure Pressures

1.Turn off main gas valve.

2.Attach (1) 12” scale manometer to an upstream bleedle valve on the gas supply pipe to the heater (Measure point “A” in Fig. 47).

3.Attach (1) 24” scale manometer to the manifold pressure tap located on the elbow downstream of the valve (Measure point “D” in Fig. 47).

4.Attach (1) 12” scale manometer near the fan-prov- ing switch. Pull black cap from air pressure switch tee and connect the manometer. NOTE: Retain caps for reinstallation later.

 

 

TO BURNER

GAS

A

B

CD

Fig. 47: Gas Pressure Measurement Locations

Check Gas Supply Pressure

1.Slowly turn on main gas shut-off valve.

2.Read the gas supply pressure from the manome- ter; minimum supply pressure for natural gas is 4.0 in. WC, recommended supply is 7.0 in. WC, mini-

mum supply pressure for propane gas is 4.0 in. WC, recommended supply is 11.0 in. WC (dynam- ic readings, full fire input).

3. If the gas pressure is greater than 14.0 in. WC, turn off the main gas shut-off valve, upstream of the heater.

Start-Up

NOTE: The values in Tables T, U and V represent the conditions when the heater is at full firing rate at sea level.

NOTE: Pressure and combustion data are provided with the heater.

1.Turn power on.

2.Turn on the heater, wait approximately 15 seconds after the blower starts, the igniter should start to glow (observable through the observation port located at the front, bottom of the heater). Look into the sight glass located at the bottom of the front panel to check igniter operation. Gas valve should open in 45-60 seconds.

3.The heater ignites at 50% of full rate (as indicated on the LCD display of the temperature control located in the upper right of the front panel).

4.If the burner fails to light on the first trial, it will try for ignition up to three times before going into lock- out with the standard ignition module. If the heater is equipped with the optional single-try ignition module, it will go into lockout.

5.Wait until the controller indicates 100% on the fir- ing rate display screen (approximately 30 seconds).

Blower Check

1.Check blower suction using the manometer attached to the fan pressure switch tee, with the heater firing at 100% input. The reading should be as noted in Table T for both natural and propane gas.

NOTE: Most commercially available amp probes are not accurate enough and/or are not shielded well enough to read accurately in the heater environment. Blower amp draw readings are for reference only.

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Raypak 503-2003 manual Preparation, Start-Up, Blower Check
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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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