Supreme B Plus - Water heaters and boilers COINTRA - Free user manual and instructions

Brand	COINTRA
Model	Supreme B Plus
Product Type	Combination water heater and boiler
Category	Heating and domestic hot water
Dimensions (Model A)	295 x 210 x 110 mm
Dimensions (Model B)	335 x 250 x 130 mm
Power Supply	230 V - 50 Hz (electrical components) / Gas (NG/LPG)
Gas Types	Natural gas (NG) or LPG (convertible)
Max Operating Pressure	3 bar (typical)
Temperature Range	30 - 80 °C
Certifications	CE Mark
Installation	Wall-mounted
Main Functions	Domestic hot water (DHW) production and central heating (CH)
Safety Features	Overheat protection, frost protection, pressure relief valve, flame failure detection
Maintenance	Annual service by qualified technician recommended
Spare Parts	Available from manufacturer or authorized dealers
Repairability	Designed for component access; repairs by professional only
Included Accessories	Installation template, user manual, mounting kit
Warranty	2 years (standard European warranty)

Frequently Asked Questions - Supreme B Plus COINTRA

How do I turn on the Supreme B Plus boiler?

Press the main power switch on the control panel. The device will start automatically. Ensure gas and water supplies are open. If not, check the gas valve and water inlet.

How do I adjust the hot water temperature?

Use the temperature control knob or buttons on the front panel. Turn clockwise for higher temperature, counter-clockwise for lower. Recommended setting is between 40-60°C for domestic hot water.

What should I do if there is no hot water?

First, check if the boiler is powered on. Verify that the gas supply is active and the water pressure is between 1-2 bar. If the pressure is too low, refill the system using the filling loop. If the issue persists, consult the error code display and refer to the manual.

How often should I service the boiler?

It is recommended to have an annual service by a qualified technician to ensure safe and efficient operation. This includes cleaning filters, checking combustion, and verifying safety devices.

What does the error code E01 mean?

Error code E01 typically indicates a flame failure or ignition problem. Check gas supply, electrode wiring, and spark gap. If the error persists, contact a service technician.

How can I improve energy efficiency?

Set the heating thermostat to a comfortable but lower temperature (e.g., 20°C). Use programmable timers to reduce heating when not needed. Regular maintenance also helps maintain efficiency.

What is the normal water pressure?

The normal operating water pressure is between 1 and 2 bar. If it drops below 0.5 bar, the boiler may shut down. Use the filling loop to add water until the pressure gauge reads 1.5 bar.

Can I install the boiler myself?

No, installation must be carried out by a licensed professional in accordance with local regulations. Improper installation can lead to safety hazards and void the warranty.

What type of gas does the boiler use?

The Supreme B Plus can run on natural gas (NG) or LPG. A conversion kit may be required to switch between gases. Check the model sticker for correct gas type.

How do I reset the boiler after a fault?

Press and hold the reset button (usually marked with a red icon) for 3 seconds. If the fault clears, the boiler will restart. If the error recurs, note the error code and contact technical support.

USER MANUAL Supreme B Plus COINTRA

Modelo		A	B	a4 ∅
11	B	295	210	110
14	B	335	250	130

CE

Technical line drawing of a mechanical assembly with pipes, gears, and a wheel (no text or symbols)

Technical line drawing of a mechanical assembly with rollers and conveyor belt (no text or symbols)

Technical line drawing of a mechanical assembly with internal components and directional arrows (no text or symbols)