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- Stock: In Stock
- Model: R4780C
- Weight: 0.20kg
2. Shipping options include DHL, UPS, FedEx, and EMS.
3. Estimated delivery time for express shipping via DHL, UPS, FedEx, or EMS generally ranges from 3 to 10 business days, depending on the destination country.
4. Please verify your address thoroughly when placing your order.
5. Important for buyers: You are responsible for any tariffs on accessories. To potentially avoid these tariffs, you may choose EMS express shipping.
6. The shipping service is responsible for any accidents, delays, or other issues that may arise.
Returns:
We offer a 14-day return policy. If you wish to return an item, please contact us within 14 days and ensure that the package remains unopened. The buyer is responsible for the shipping costs for both the return and the initial delivery, as well as any applicable customs fees. Once we receive and inspect the product, we will process your refund within 24 hours.
For any quality issues that arise during normal use within the warranty period, we will repair the item free of charge. The buyer is responsible for the return shipping cost, while our company will cover the cost of re-shipping the repaired item.
Product Description:
The R4780 Protectorelay is a programmable flame safeguard controller for batch
operation of oil-fired, gas-fired, or oil/gas-fired burners with a combustion capacity
of 350 kW or more. Noteworthy features include the following:
• The progress of the control sequence is displayed on the status indicator.
• A ground fault detection circuit is built in to ensure safety if there is a ground
fault involving the valve, ignition transformer, etc.*
• Safe operation is ensured by a pilot-only proving period, even if the flame detector
has detected an ignition spark.
• The safe start circuit prevents startup if an external circuit fails or if there is a
false flame signal.
• If a lockout occurs, the combustion equipment cannot be restarted unless the
reset button is pushed manually.
• Both three-position control and proportional control of combustion are available.
* If deteriorated insulation or the like causes a ground fault in a load such as the
ignition transformer, pilot valve, or main valve, the R4780 detects the problem
and shuts down and locks out the combustion equipment even if the power does
not have hot and ground sides.