MODULATING VALVES

W/ BUILT-IN REGULATOR

Fig. 28: Mechanical Modulating Valve Location

Fig. 29: Mechanical Modulating Valve

Mode H2 - Motorized Modulation

The design uses a motorized valve which varies posi- tion based upon an external controller that communicates with the gas valve actuator, through a 3-wire 0-135 ohm wiper circuit. Minimum fire is 20% of rate. The actuator runs on 120V power, and takes 26 seconds to go from fully closed to fully open. Raypak offers a single-boiler digital controller which drives the actuator; see controller options B-40 and B-41 (includes outdoor reset). For systems with mul- tiple boilers, see controller options B-45 through B-47. For a field-supplied controller with a 4-20 mA signal, see option B-35.

Mode H3 - 2-Stage Firing

The boiler will fire at low fire when there is closure across the stage 1 contacts. Thereafter, it will fire at high fire when there is closure across the stage 2 contacts. Numerous staged controllers are available.

Mode H4 - On/Off Firing

The boiler will fire at full fire when there is closure across the TH contacts. Numerous mechanical staged controllers are available (see Fig. 37), as well as digital controllers offering additional features. A typical wiring diagram for a mid-size H4 unit is shown on page 35; this basic layout applies to most other firing modes as well.

Mode H9 - 4-Stage Firing

The boiler will fire at lowest setting when there is clo- sure across the stage 1 contacts. Thereafter, it will fire at increasing rates when there is closure across the contacts for additional stages. Loss of closure across stage 1 will shut down the entire boiler imme- diately. Numerous digital controllers are available.

WH Modes

Connections for Tankstats in WH modes are shown in Figs. 30 and 31.

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Fig. 30: Single Stage Tankstat

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Raypak 133-4001 manual Mode H2 Motorized Modulation, Mode H3 2-Stage Firing, Mode H4 On/Off Firing, Mode H9 4-Stage Firing
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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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