Raypak 400/401, 260/261, 181/182 Sequence of Operation, Start Up Procedures, Draft Proving Switch

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Sequence of Operation

On call for heat, the D-2 Power Vent fan (and appli- ance pump) start. When the flow switch circuits close, the ignition system consisting of an electronic spark module, pilot gas system and flame sensor, are ener- gized. When draft proving switch closes and all safety circuits are proven, the automatic main gas valves will open and the heater will operate. When the operating limit circuit is satisfied, the heater will shut down.

Start Up Procedures

The water system, the gas system and the electrical system for the heater should be completed and checked as per the heater installation manual and associated documents.

1. Turn on power to the heater with the manual main gas valve and pilot gas valve off. The electric power supply requirements are:

a. Dual-voltage fan motor.

120/240 volt 60Hz 1.0/1.95 Amp fan motor for models 181-401.

2.Check power connections.

3.Close heater power switch.

4.Set operating control to call for heat.

a.Fan motor starts, draft proving switch clos- es.

b.Heater pump starts, flow switch closes.

c.Ignition module energized.

d.Check for spark at gas pilot.

5.Turn operating control to end call for heat.

6.Wait a minimum of 60 seconds.

7.Open pilot gas valve.

a.Repeat procedure outlined in #4 above.

8.After pilot gas is proven and main safety shut-off valve is energized.

a.Main burners will ignite.

9.Heater will operate until call for heat is satisfied.

10.Restart unit and visually check all components for proper operation.

11.Check all vent connections and joints for leakage. Correct if found.

12.To restart unit after a failure, follow the procedures outlined above and other subsequent or related sec- tions outlined in the heater manual.

EMERGENCY SHUTDOWN: SHUT OFF ALL POWER AND GAS, CALL GAS UTILITY.

Draft Proving Switch

The draft proving switch insures that the blower is operating. The switch is in the limit circuit and does not allow the ignition module to operate unless it is closed.

NEGATIVECONNECTORPRESSURE

Fig. 7: Draft Proving Switch

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Contents Power Vent Page Contents Receiving Equipment General SpecificationsInstallation Tabs Beforeafter Table B Vent/Air Inlet Termination Clearances Left Side Relay GAS Wiring Diagrams-182-260 H4/WH1 Atmospheric 181-261 H4/WH1 Low NOx Wiring Diagrams-330-400 H4/WH1 Atmospheric 331-401 H4/WH1 Low NOx See Table D for Dimensional Data Sequence of Operation Start Up ProceduresDraft Proving Switch Illustrated Parts List 330-401

330/331, 400/401, 181/182, 260/261 specifications

Raypak is a leading manufacturer in the pool and spa heating industry, known for its innovative and tech-savvy products. Among its offerings, the Raypak 260/261, 181/182, 400/401, and 330/331 series of heaters stand out due to their advanced features and characteristics.

The Raypak 260/261 series is designed specifically for residential and commercial pools. One of its main features is its digital control system, which ensures precise temperature settings and improved energy efficiency. With a maximum output of 260,000 BTUs, this series is perfect for heating larger pools, providing quick warm-up times and consistent heat levels, making swimming enjoyable even in cooler months. The 260/261 series also incorporates a unique low NOx design for environmentally friendly operation, adhering to strict emissions standards.

Next in line, the Raypak 181/182 series is known for its compactness and efficiency. With an output of 180,000 BTUs, this heater is perfect for smaller residential pools and spas. It features a bronze header design which resists corrosion, enhancing its longevity. Additionally, the direct spark ignition system contributes to reliability and ease of use, ensuring a quick startup without the need for a pilot light.

The Raypak 400/401 series caters to high-demand scenarios where quick heating is crucial. With an impressive heating capacity of up to 400,000 BTUs, it is designed for commercial applications, such as hotels and water parks, as well as large residential installations. This series is equipped with advanced digital control technologies, allowing for easy monitoring and adjustment of settings. The built-in stainless steel burner, combined with a robust heat exchanger design, enables efficient thermal performance and extended service life.

Lastly, the Raypak 330/331 series provides a well-balanced option for those seeking power and efficiency. With heating outputs of 330,000 BTUs, this series combines the latest in heat exchanger technology with a user-friendly interface. It also features Raypak’s signature low NOx emissions technology, making it suitable for compliance with regional air quality regulations.

In summary, Raypak's various heater series, including the 260/261, 181/182, 400/401, and 330/331, offer a diverse selection of features tailored for different heating needs. With a strong emphasis on performance, efficiency, and environmental responsibility, Raypak continues to be a dominant player in the pool and spa heating industry.