Pump Time Delay

There are two versions of the Pump Time Delay. The first is the Economaster II. It is an electronic device that allows the operator to set a variable time (3 to 10 minutes) for the pump to run after the boiler shuts off. See Fig. 40 (A) . The time is factory-set at 7 minutes and it can be re-adjusted in the field.

The second version is a fully enclosed solid state TDR with a white jumper that selects one of two time delays. See Fig. 40 (B). If the jumper is on pins 6 and 7 (default) the delay time is 5 minutes. If the jumper is not on pins 6 and 7, the time delay is 10 minutes.

In a conventional system, when the Aquastat is satis- fied, the main gas valve closes, but the pump continues operating. With either time delay relay the boiler pump is programmed to continue running for an optimum period of time in order to absorb the residual heat from the combustion chamber and use it in the system. The pump then shuts off until the next call for heat is received from the Aquastat.

(A)

(B)

Fig. 40: Economaster Time Delay Relays (TDR)

UDB Diagnostic Board

This heater is equipped with a diagnostic board which will indicate faults as they occur. Refer to the following section for instructions on accessing, reviewing and clearing these faults.

Fig. 41: UDB Diagnostic Board

UDB Fault History

To view the fault codes in the UDB history file:

1.Press the UP or DOWN buttons on the membrane switch for 2 seconds to access the fault history.

2.Press either button to scroll through the recorded faults in history.

3.The most recent fault recorded will be the first fault displayed (the last 16 faults are stored in the his- tory, on a rolling basis). There is no time or date stamp associated with these faults.

4.When the history of faults has been exhausted, pushing the UP or DOWN buttons again will roll the fault history over and it will start again.

5.To exit the fault history, wait for 10 seconds and the board will automatically exit the history mode.

To clear the fault history, press and hold both the UP and DOWN buttons for 5 seconds while the power is on.

NOTE: Once the history has been cleared, it cannot be recovered.

Diagnostic information is provided any time a fault is recorded. This information is intended to assist in locating the problem with the heater, but is not exhaus- tive.

If multiple fault conditions occur at the same time, only the fault that caused the heater to shut down will be recorded in the history.

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Raypak 992B manual Pump Time Delay, UDB Diagnostic Board, UDB Fault History

992B specifications

The Raypak 992B is a highly regarded commercial boiler known for its efficiency and reliability in heating applications. Designed for a range of installations, it is particularly favored in schools, hotels, and various commercial settings where dependable heating is crucial. One of the standout features of the Raypak 992B is its impressive thermal efficiency rating, often exceeding 90%. This efficiency translates into lower energy costs and reduced environmental impact, making it a smart choice for eco-conscious businesses.

The Raypak 992B comes equipped with advanced technologies that enhance performance and ease of use. Among these technologies is the high-precision digital control system, which allows for accurate temperature regulation and monitoring. This feature ensures optimal performance and minimizes energy waste, further contributing to the unit's cost-effectiveness. The boiler also utilizes a modulating burner system, enabling it to adjust flame size based on real-time heating demands. This adaptability not only enhances efficiency but also improves overall comfort within a facility.

Another significant characteristic of the Raypak 992B is its robust construction. Built with durable materials designed to withstand demanding operating conditions, this boiler is engineered for long-lasting performance. Its compact design is an added benefit, facilitating installation in areas with limited space. The unit is also equipped with a stainless steel heat exchanger, which provides superior resistance to corrosion and enhances heat transfer efficiency.

Safety features are also paramount in the design of the Raypak 992B. The boiler includes multiple safety controls and alarms to prevent overheating and maintain safe operating conditions. This diligence in safety ensures peace of mind for operators and reduces the risk of unexpected downtime.

In summary, the Raypak 992B stands out as a top choice for commercial heating solutions, combining high efficiency, advanced technology, and rugged construction. Its features cater to a wide range of heating needs while prioritizing safety and economy. With its impressive performance capabilities, the Raypak 992B continues to be a reliable partner for facilities seeking optimal heating solutions.