TND Plus 150 - Water heater COINTRA - Free user manual and instructions
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| Product type | Gas instantaneous water heater (tankless) |
| Brand | Cointra |
| Model | TND Plus 150 |
| Mounting | Wall-mounted |
| Energy source | Natural gas (G20) or LPG (G30/G31) – convertible |
| Nominal heat input | 25 kW (approx.) |
| Hot water flow rate at ΔT=25°C | 15 L/min |
| Hot water flow rate at ΔT=35°C | 10.7 L/min |
| Minimum water pressure | 0.2 bar |
| Maximum water pressure | 10 bar |
| Gas connection | 1/2" BSP male |
| Water connection | 1/2" BSP male |
| Ignition | Electronic automatic |
| Power supply for ignition | 1.5 V AA battery |
| Gas pressure (NG) | 20 mbar |
| Gas pressure (LPG) | 37 mbar |
| Safety features | Flame failure device, overheating protection, anti-freeze protection |
| Dimensions (H × W × D) | 700 × 400 × 250 mm |
| Net weight | 16 kg |
| Degree of protection | IPX4 (splash-proof) |
| Maintenance | Periodic descaling and filter cleaning recommended |
Frequently Asked Questions - TND Plus 150 COINTRA
What is the Cointra TND Plus 150?
The Cointra TND Plus 150 is a gas instantaneous water heater (tankless). It heats water on demand with a flow rate of up to 15 liters per minute at a temperature rise of 25°C, making it suitable for multiple outlets simultaneously.
Can the TND Plus 150 run on bottled gas?
Yes, the appliance is factory set for natural gas but can be converted to LPG (propane/butane). Conversion requires changing the injectors and adjusting the gas pressure regulator. Please refer to the instructions or contact a qualified technician.
Why does the heater take a long time to produce hot water?
The TND Plus 150 is an instantaneous heater, so it only heats water when a tap is opened. If you feel a delay, it is due to the time needed for the water to travel through the pipes. The heater itself ignites within 2-3 seconds. Check that the hot water pipe length is not excessive or idle.
How often should I descale the water heater?
In areas with hard water, descaling should be done at least once a year. You can use a descaling solution compatible with the materials. The water filter at the inlet should be cleaned every 3 months to prevent limescale and debris buildup.
What temperature should I set?
For domestic use and to prevent scalding, a temperature of around 55-60°C is recommended. This also reduces limescale accumulation. The TND Plus 150 has a control knob allowing you to adjust the outlet temperature between about 35°C and 65°C.
Can the heater be installed outdoors?
The TND Plus 150 is approved for indoor installation only. Although it has an IPX4 rating (splash-proof), it does not have sufficient weather protection for outdoor installation. Always install it in a well-ventilated room.
What should I do if the heater fails to ignite?
First, check that the gas valve is open and the battery is charged. Turn off the heater and remove the battery, then reinsert it correctly. Ensure the water flow reaches the minimum required (about 2.5 L/min). If the problem persists, the flame detection thermocouple may need cleaning or replacement.
Is it safe to use the heater in the bathroom?
No, the heater is not suitable for installation in bathrooms, bedrooms, or rooms with high humidity unless it is fully room-sealed. Local building codes usually require a minimum distance from water splashes. Always follow the installation instructions.
How do I clean the water filter?
Locate the inlet water filter (usually at the bottom of the unit opposite the water connections). Turn off the water supply and gas, unscrew the filter cap, remove the mesh filter, and rinse it under running water. Reinstall and check for leaks.
Why does the water temperature fluctuate?
Fluctuation can occur if there are rapid changes in water pressure or if the gas supply is unstable. The TND Plus 150 is not thermostatic; it modulates the flame to maintain a set output, but if multiple taps are used, the temperature may vary. To reduce fluctuation, ensure the cold water inlet pressure is constant and not too low.
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USER MANUAL TND Plus 150 COINTRA
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Product information
Brand : COINTRA
Model : TND Plus 150
Category : Water heater