7.Using an Allen wrench, turn the screw clockwise to increase or counterclockwise to decrease high fire manifold pressure –see Fig. 47.

8.Install the spring, weight and aluminum cap –tight- en the cap using same # of turns as was used in removing the cap.

9.For low fire adjustment, tighten the aluminum cap to increase and loosen to decrease low fire mani- fold pressure.

10.Install 2-stage solenoid valve and turn heater on, check manifold pressures.

11.Repeat steps 3 to 10 until correct manifold pres- sures are obtained.

12.Secure 2-stage solenoid valve by tightening the 3/8” nut or #10 Torx screw.

Gas Valve Removal

1.Remove burner tray. See Burner Tray Removal procedure.

2.Disconnect, pilot tubing from gas valve.

3.Turn vertical gas pipe from manifold slightly and unscrew gas valve.

4.Reverse above procedure to re-install.

Main Burner and Orifice Removal

1.Remove burner tray. See Burner Tray Removal procedure.

2.Remove pilot. See Pilot Removal procedure.

3.Remove (8) total screws from the hold-down brackets, front and rear of tray.

4.Remove (8) total screws from the left and right sides of the manifold assembly. Detach the mani- fold assembly from the burner tray assembly.

5.Remove burners by raising the bracket on the back end of the burners up and out of their slots.

6.Use a long ½” socket wrench to remove orifices from the gas manifold.

7.Remove burners by raising the bracket on the back end of the burners up and out of their slots.

8.Reverse above procedure to re-install.

Pilot Removal

1.Disconnect pilot tubing from gas valve.

2.Remove (4) screws from control box. Open the control box.

3.Remove the pilot wire from the ignition wire.

4.Remove (2) screws that mount the pilot bracket to the air manifold assembly.

Fig. 48: IID Pilot

5.Pull the pilot bracket slightly, then drop and pull downwards and outwards.

6.Reverse above procedure to re-install. Make sure the pilot bracket is all the way up on the pilot side, see drawing below.

FOR HEATERS

MADE IN OR AFTER

AUGUST 2001

Fig. 49: Pilot Removal

Combustion Fan Removal

1.Remove burner tray. See Burner Tray Removal procedure.

2.Remove (4) screws that mount the combustion blower to the manifold assembly.

3.Reverse above procedure to re-install.

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Raypak 133-4001 manual Gas Valve Removal, Main Burner and Orifice Removal, Pilot Removal, Combustion Fan Removal
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133-4001 specifications

Raypak 133-4001 is a premier heating solution designed for both residential and commercial applications, known for its efficiency and reliability. This high-performance water heater is specifically engineered to meet the demanding requirements of hot water supply while ensuring energy conservation and user convenience.

One of the standout features of the Raypak 133-4001 is its robust construction. Made from high-quality materials, including a corrosion-resistant heat exchanger and durable casing, this unit is designed to withstand harsh environmental conditions. Its compact design allows for easy installation in various locations, making it an ideal choice for homeowners and businesses alike.

The unit operates on natural gas or LP gas, providing versatility in fuel choice. With a heating capacity of 199,000 BTU/hr, it delivers an impressive flow rate that ensures a steady supply of hot water, even during peak demand periods. This capacity makes it suitable for a wide range of applications, from residential water heating to larger facilities requiring substantial hot water output.

Raypak’s advanced technology set ensures that the 133-4001 operates at maximum efficiency. It utilizes a modulating power burner that adjusts the flame based on demand, optimizing fuel consumption. This feature not only helps in reducing energy bills but also minimizes the carbon footprint, making it an environmentally friendly option.

Another notable characteristic of the Raypak 133-4001 is its digital control system. The intuitive interface allows for precise temperature adjustments and easy monitoring of the heating process. Users can set the desired water temperature, and the system will maintain it consistently, ensuring comfort and reducing the risk of scalding.

Safety is a paramount consideration in the design of the 133-4001. It features a built-in high-limit switch, pressure relief valve, and multiple safety sensors to prevent overheating and potential hazards. These safety features provide peace of mind for homeowners and facility managers, knowing that their hot water system is reliable and secure.

In conclusion, Raypak 133-4001 combines advanced technology, robust construction, and user-friendly features, making it a highly effective water heating solution. Its efficiency and dependability cater to a variety of hot water needs, positioning it as a top choice for both residential and commercial use. Whether for a single-family home or a large facility, the Raypak 133-4001 is built to deliver exceptional performance with every use.
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