size, and connections which comply with all applicable codes.

Flame Roll-Out Safety Switch

The boiler is equipped with a cut-off device to prevent flame roll-out in the event the heat exchanger becomes blocked. This is a "manual reset" type roll- out switch, that must be reset by a service technician after any over temperature conditions have been fixed. Excessive restriction in the heat exchanger flue pas- sage may cause the switch to disable the boiler.

Fig. 45: Flame Roll-Out Safety Switch

Service

Burner Tray Removal

COMBUSTION

AIR BLOWER

AIR SHUTTER

ADJUSTMENT

GAS

VALVE

BURNER

BURNER

HOLD-

DOWN

BRACKET

Fig. 46: Low NOx Burner Tray Assembly

1.Shut-off main electrical power switch to heater.

2.Shut-off gas upstream of heater.

3.Remove front door.

4.Disconnect gas line from gas valve.

5.Remove (2) screws that mount burner tray to the base of the unit, and (2) screws that secure gas valve to jacket.

6.Disconnect wires that terminate at gas valve.

7.Unscrew (4) screws that secure the control box.

8.Disconnect pilot wire from the ignition module.

9.Disconnect wire harness from the combustion blower.

10.Carefully slide out the burner tray assembly.

11.Reverse above procedure to re-install.

Gas Valve Adjustment - Robertshaw (Invensys) 7000 Series 2-Stage Gas Valve with Solenoid Valve

NOTE: Attach a manometer and check the manifold pressures –both high fire and low fire– before making any adjustments.

1.Turn the heater off.

2.Remove the 3/8” nut or the #10 Torx screw.

3.Lift solenoid valve up, keeping the wires connect- ed to the solenoid valve.

4.If only low fire adjustment is needed, go to Step 9.

5.Using a 3/8” wrench, carefully remove the alu- minum cap that was under the solenoid valve-count # of turns when removing the cap. Be careful not to drop the cylinder (weight) or the small spring that is under the cap –see Fig. 47.

6.Remove the spring and store in a safe place.

Fig. 47: 2-Stage Gas Valve Adjustment (Invensys)

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Raypak 133-4001 manual Flame Roll-Out Safety Switch, Service Burner Tray 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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