Heater Sequence of Operation

If all limits are satisfied and there is a call for heat:

1.The heater pump is powered and begins circulat- ing water through the heat exchanger.

2.The blower is powered and goes through a 15 sec- ond prepurge beginning when air flow is proven by closure of the blower suction air pressure switch.

3.The igniter is powered, and once proven, heats up for 20 seconds.

4.The gas valve is then energized for a 4 second trial for ignition period. Trial for ignition is fixed at 50% input. The heater is allowed to modulate once flame is proven and the firing rate will adjust to match the load based on the configuration and set- tings of the temperature control or external input.

5.Once the heat demand is satisfied the gas valve will close and the blower will run a 30 second post purge. The heater pump will continue to circulate water for 0 to 10 minutes depending on the pump delay setting on the Raypak modulating tempera- ture control.

Ignition Module

When additional heat is needed, the combustion air blower starts to purge air from the combustion cham- ber for 15 seconds. On proof-o f-air flow, the air-proving switch closes and the igniter is energized. To ensure safe operation, the gas valve cannot open until the igniter is verified. The main burner is automat- ically lit when the device is powered and pre-purged. The heater performs its own safety check and opens the main valve only after the igniter is proven to be capable of ignition. The standard ignition module will attempt to light three times before locking out. To reset it, turn off power to the heater, wait 30 seconds and re- apply power.

The optional single-try ignition module will lock out after failing to light one time. To reset it, press and release the small, recessed black push button located inside of the cut-out on the lower right-hand corner of the ignition module case. Turning off the power to the heater WILL NOT reset the ignition module.

Code

 

Condition

 

 

 

On

 

System OK; No faults present

 

 

 

Off

 

Possible control fault; Check power

 

 

 

1 Flash

 

Low air

 

 

 

2 Flashes

 

Flame in combustion chamber;

 

No call for heat

 

 

 

 

 

3 Flashes

 

Ignition lockout

 

 

 

4 Flashes

 

Low HSI current

 

 

 

5 Flashes

 

Low 24 VAC

 

 

 

6 Flashes

 

Internal fault; Replace control

 

 

 

 

 

Table U: Ignition Module

 

Diagnostic LED Flash Codes

High Limit—Manual Reset

This heater is equipped with a fixed setting manual re- set high limit temperature device as standard or it may have an optional adjustable setting manual reset high temperature device.

The fixed setting manual reset high limit is located on the In/Out header of the heat exchanger on the right side of the heater (accessible through the front door for reset as necessary).

The optional adjustable manual reset high limit is lo- cated inside the heater junction box. Push the reset button and adjust the setting to approx. 40°F (20°C) above desired outlet temperature.

Fig. 38: Ignition Module

37

Fig. 39: High Limit (Manual Reset)

 

 

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Raypak 5042004 Heater Sequence of Operation, Ignition Module, High Limit-Manual Reset, Code Condition

5042004 specifications

The Raypak 5042004 is a highly efficient pool heater designed for residential and commercial applications, providing warmth and comfort for swimming pools and spas. It is a part of Raypak's extensive lineup of pool heating solutions, known for their reliability and energy efficiency. This model caters to different heating needs while maximizing performance and reducing energy consumption.

One of the standout features of the Raypak 5042004 is its use of advanced heat exchanger technology. Constructed with a durable copper fin design, the heat exchanger enhances thermal conductivity, allowing the unit to heat water quickly and effectively. This ensures a consistently enjoyable swimming experience, even in cooler weather conditions. The heater’s aluminum cabinet is designed to withstand harsh weather and resist corrosion, increasing its longevity and reliability.

In addition to its robust construction, the Raypak 5042004 incorporates a user-friendly digital control system. This control system allows users to set their desired temperature with precision, enabling easy adjustments and enhanced control over the heating process. The digital display provides real-time feedback, giving users insight into the system's operation and current water temperature.

Moreover, this model offers a specialized environmentally friendly option. The Raypak 5042004 is designed to run efficiently on both natural gas and propane, which provides flexibility regarding fuel choice based on availability and personal preference. This versatility is paired with low NOx (nitric oxide) emissions, making it compliant with stringent environmental regulations, making it an eco-friendly choice for consumers.

The ease of installation is another characteristic that sets the Raypak 5042004 apart from its competitors. The unit includes versatile piping options and integrated automation features that facilitate quick and hassle-free installation, ultimately saving time and effort for both professional installers and DIY enthusiasts.

In summary, the Raypak 5042004 is a cutting-edge pool heater that combines high efficiency, robust construction, user-friendly controls, and eco-friendly features. Its advanced heating technologies, durable design, and versatile fuel options make it an excellent choice for anyone looking to enhance their swimming experience year-round while being conscious of energy consumption and environmental impact.