SECTION D: Start up

of the control system and any gas control which has been under water.

•Check around unit for debris and remove combusti- ble products, i.e. gasoline, etc.

Pre Start-up Check

1.Verify heater is filled with water.

2.Check system piping for leaks. If found, repair immediately.

3.Vent air from system. Air in system can interfere with water circulation. If the heater is equipped with the optional air vent, ensure that it is adjusted before firing the heater to make sure all air is vented prior to start-up.

4.Purge air from gas line up to heater.

Initial Start-up

Tools Needed

•(1) 12-0-12, 24” scale U-tube manometer

•(2) 6-0-6, 12” scale U-tube manometer

•(1) Phillips screwdriver

•(1) Crescent wrench

•(1) Multi-meter

•(1) Amp probe

NOTICE: Digital manometers are not recommended.

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. 39).

3.Attach (1) 24” scale manometer to the manifold pressure tap located on the valve (Measure point “C” in Fig. 39).

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

Fig. 39: Gas Pressure Measurement Location

Check Gas Supply Pressure

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

2.Read the gas supply pressure from the manometer; 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” WC (dynamic readings, full fire input).

3.If the pressure is > 14.0 in. WC, turn off the valve.

4.Check if the service regulator is installed and/or adjust the service regulator.

Start-Up

Blower Adjustment

1.Turn off power.

2.Unplug cap at pressure switch and connect ma- nometer to the tee.

3.Close manual firing valve.

4.Turn power on.

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Raypak 503-2003 manual Start-Up, Pre Start-up Check, Initial Start-up, Blower Adjustment
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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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