Preparation

WARNING: Do not turn on gas at this time.

Check Power Supply

With multi-meter at incoming power in Hi Delta heater, check voltage between:

Hot - Common (≈120 VAC)

Hot - Ground (≈120 VAC)

Common - Ground (< 1 VAC)

WARNING: If Common - Ground is > 1 VAC,

STOP: Contact electrician to correct ground failure. Failure to do this may burn out 120V-24V trans- former, or may cause other safety control damage or failure.

Attach Manometers to Measure Pressures

1.Turn off main gas valves.

2.Attach 24” scale manometer to the first main gas shut-off valve pressure tapping.

3.Attach (1) 12” scale manometer to the outlet side of the second main gas shut-off valve pressure tapping.

4.Attach (1) 12” scale manometer near the fan-prov- ing switch. Pull black cap from air pressure switch tee and connect the manometer. NOTE: Retain caps for reinstallation later.

NOTE: The fan(s) pressure is already factory set to

1.4in. ± .1 in. WC (up to 4500 ft altitude). If adjust- ment(s) is required, consult the appropriate Hi Delta manual.

Check Gas Supply Pressure

1.Slowly turn on main gas shut-off valve.

2.Read the gas supply pressure from the manome- ter; minimum supply pressure for natural gas is 5.0 in. WC, recommended supply is 7.0 in. WC, mini- mum supply pressure for propane gas is 8.0 in. WC (dynamic readings, all stages firing).

3.If the pressure is > 14.0 in. WC, turn off the valve.

4.Check if the service regulator is installed and/or adjust the service regulator.

WARNING: This FlexGas heater is intended for operation on Natural Gas as the primary fuel. DO NOT use this heater with Propane Gas as the pri- mary fuel.

FlexGas System Start-up

1.Turn off unit. Ensure that the switch on the FlexGas control is in the position marked “NAT”. See Fig. 6 for FlexGas control operation. Ensure the manual valve on the natural gas supply is open and the manual valve on the propane supply is closed.

2.Turn on the unit, wait 15 seconds, and the igniter should glow. Look into sight glass located at each end of the heater to check igniter operation. Gas valves should open in 45-60 seconds.

3.If burner does not light on first trial. It will retry, up to three times.

4.Main burner ignition: Check manifold gas pres- sure at gas valve outlet pressure tap. This should read 3.5 ± 0.1 in. WC for natural gas. If the natural gas manifold pressure is not within 3.5 ± 0.1 in. WC, follow the instructions in the Hi Delta I&O manual for adjusting manifold pressure. If a flue gas analyzer is used, the CO2 on natural gas should be 7.5-8.5% and CO should be less than 150 ppm.

NOTE: Do not adjust Hi Delta valve(s) or manifold settings when operating on propane. These should only be adjusted while firing natural gas.

5.When acceptable operation on Natural Gas is con- firmed, turn the gas selector key on the FlexGas control to “OFF”.

6.Close the manual valve on the natural gas supply then open the manual valve on the propane sup- ply. When the heater shuts off, turn the FlexGas control key counter-clockwise to the “PRO” posi- tion.

7.Wait 15 seconds, and the igniter should glow. Look into sight glass located at each end of the heater to check igniter operation. Gas valves should open in 45-60 seconds.

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Raypak 302BD-2342BD FlexGas System Start-up, Preparation Check Power Supply, Attach Manometers to Measure Pressures
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302BD-2342BD specifications

The Raypak 302BD-2342BD is a standout in the realm of commercial water heating, designed to meet the needs of various applications while ensuring efficiency and reliability. Known for its robust construction and state-of-the-art technology, this model is a preferred choice for both residential and commercial users.

One of the key features of the Raypak 302BD-2342BD is its dual thermostat functionality. This feature allows for precise temperature control, making it suitable for diverse heating requirements. With a maximum output of 302,000 BTUs, this unit can handle large volumes of water, making it ideal for swimming pools, spas, and other high-demand situations.

The Raypak 302BD-2342BD is also equipped with a highly efficient heat exchanger. Constructed from copper, the heat exchanger provides superior thermal conductivity, allowing for faster heating and improved energy efficiency. This contributes to reduced operating costs, a crucial consideration for commercial applications where budget constraints are paramount.

Another notable characteristic of this model is its compact design. The unit is engineered for easy installation, taking up minimal space while still delivering powerful performance. This aspect is particularly advantageous in commercial settings where space can be a significant limiting factor.

Safety and user-friendly operation are prioritized in the design of the Raypak 302BD-2342BD. It features an integrated digital display, providing users with real-time information about the unit's performance and conditions. Furthermore, the model includes built-in diagnostic features, allowing for easy troubleshooting and maintenance.

The Raypak 302BD-2342BD also boasts advanced flame sensing technology, ensuring a secure and reliable ignition process. This feature enhances safety while promoting efficiency by optimizing combustion levels.

Lastly, the unit is compatible with various fuel types, including natural gas and propane. This versatility ensures that users can select the most suitable fuel source based on availability and cost considerations.

In summary, the Raypak 302BD-2342BD represents the pinnacle of modern water heating technology, boasting features such as dual thermostats, a high-efficiency heat exchanger, a compact design, and advanced safety measures. Its combination of power, efficiency, and versatility positions it as a leader in the market, meeting the heating needs of both residential and commercial users alike.
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