SECTION D: Start up

Lighting Instructions

1.Before lighting, make sure you have read all of the safety information in this manual.

2.Remove upper front panel.

3.Set the thermostat to the lowest setting.

4.Turn off all electrical power to the appliance.

5.This appliance is equipped with an ignition device which automatically lights the burner. Do not try to light the burner by hand.

6.Turn on main manual gas valve field installed near gas inlet connection on back of heater.

7.Wait 5 minutes to clear out any gas. Then smell for gas, especially near the floor. If you then smell gas, STOP! Follow the steps in the safety informa- tion on the front cover of this manual. If you do not smell gas, go to next step.

8.Turn on all electrical power to the appliance.

9.Set thermostat to desired setting. The appliance will operate. The igniter will glow after the pre- purge time delay (15 seconds). After igniter reaches temperature (30 seconds) the main valve should open. System will try for ignition one time (three times on optional 3-try ignition module). If flame is not sensed, lockout will commence.

10.If the appliance will not operate, follow the in- structions “To Turn Off Gas To Appliance,” and call your service technician or gas supplier.

11.Replace upper front panel.

SECTION E

Operation

12.If heater fails to start, verify the following:

a.There are no loose connections or that the ser- vice switch is off.

b.High temperature limit switch is set above wa- ter temperature or manual reset high limit is not tripped.

c.Thermostat is set above water temperature.

d.Gas is on at the meter and the heater.

e.Incoming dynamic gas pressure to the gas valve is NOT less than 4.0 in. WC for natural gas or propane gas.

To Turn Off Gas To Appliance

1.Shut off manual gas valve field installed near gas inlet connection on back of heater.

2.Remove upper front panel.

3.Set the thermostat to lowest setting.

4.Turn off all electrical power to the appliance if service is to be performed.

5.Replace access panel.

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Raypak 503-2003 manual Section E, Operation, Lighting Instructions, To Turn Off Gas To Appliance
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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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