HI-DELTAModel 502-752

The black (hot) wire leads you directly to the Main Power Switch. This switch is located at the bottom right-front corner of the control compartment. When the main power switch is placed in the “ON” position, both the 120 v and 24 v terminal blocks on the Main Circuit Board will be powered and the power light will turn on. When the Auto On- Off switch is turned ON, the following 24 v safety components are immediately energized: Low Water Cut-off, Blocked Vent Switch, Manual Reset Limit Control, Low Gas Pressure Switch (optional) and the High Gas Pressure Switch (optional). At this point if all the preceding safety switches are closed, then Relay K 1 (n.c.) will be energized and the safety light will turn off. The boiler is now ready for a call for heat.

When STAGE 1 calls for heat, the CALL FOR HEAT LIGHT will turn on. The Economaster Board will be energized and the pump will turn on. If the pump generates enough flow to activate the flow switch, the flow light will turn on, then power will be applied to the thermostat terminal of the Ignition Module and the Blower will activate.The Air Pressure Switch will close, and the pressure switch terminal on the Ignition Module will be energized the blower light will turn on. The Unit will now undergo a 15 second pre-purge. After the pre-purge cycle, Hot Surface Igniter will heat up. The heat-up period takes about 30 seconds after which a trial for ignition is initiated. During the trial for ignition, which lasts for four seconds, power is applied to Firing Valve No. 1. If within four seconds, the Remote Sensor establishes flame rectification, the Firing Valve No. 1 stays open and the Stage 1 light will turn on. Also, the Valve terminal from the ignition Module will power Relays K2, and K3.

When Stage 2 calls for heat, power will pass through the Time Delay Relay, then after 10 seconds through Relay K2, and then applied to Firing Valve No. 2, and the Stage 2 light will turn on.

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Raypak 302-902 manual HI-DELTAModel
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302-902 specifications

The Raypak 302-902 is a highly efficient, reliable, and versatile heating solution commonly used in residential and commercial pool heating applications. Known for its exceptional performance and advanced technology, the Raypak 302-902 has become a favored choice among pool owners looking to extend their swimming season and enhance comfort.

One of the main features of the Raypak 302-902 is its robust construction. Built with a copper heat exchanger, it is designed to withstand the rigors of continuous use while offering superior heat transfer capabilities. The heat exchanger is also designed for easy maintenance, enabling pool owners to keep their systems running efficiently for years.

The Raypak 302-902 employs advanced digital controls, which provide precise temperature regulation. This modern control system allows users to set their desired water temperature with accuracy and maintain it consistently, ensuring a pleasant swimming experience. Additionally, these digital controls feature self-diagnostic capabilities, alerting users to potential issues, which aids in quick troubleshooting and maintenance.

In terms of energy efficiency, the Raypak 302-902 stands out with its ability to harness energy effectively, leading to significant savings in operational costs. It is equipped with an efficient gas burner, which optimizes fuel consumption while delivering rapid heating performance. This efficiency is complemented by its ability to operate with natural gas or propane, making it adaptable to various setups and preferences.

The unit also prides itself on its environmentally friendly operation. It meets stringent regulations for emissions, ensuring that pool owners can enjoy a pool heating solution that is both effective and reduces its ecological footprint. This focus on sustainability has made it a popular choice among environmentally conscious consumers.

Moreover, the Raypak 302-902 is designed for versatility. It can be easily integrated with existing pool systems and is compatible with both in-ground and above-ground pools. This flexibility allows it to cater to a wide range of pool sizes and configurations, making it suitable for both residential and commercial applications.

In conclusion, the Raypak 302-902 offers an array of features, technologies, and characteristics that make it a top contender in the pool heating market. With its durable construction, advanced digital controls, energy efficiency, and environmentally friendly operation, it remains a reliable choice for those seeking comfort and convenience in their swimming experience. Whether for a backyard oasis or a commercial facility, the Raypak 302-902 delivers consistent performance and accessibility.
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