Ursus Trotter

Komfortek C7-D GL - Water heaters and boilers Ursus Trotter - Free user manual and instructions

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Product Type Combi boiler (water heater and central heating)
Brand Ursus Trotter
Model Komfortek C7-D GL
Energy Source Natural gas or LPG
Heating Output (max) 24 kW
DHW Output (max) 28 kW
Hot Water Flow Rate (ΔT 30°C) 12 L/min
Dimensions (H x W x D) 700 x 400 x 300 mm
Weight 28 kg
Electrical Supply 230 V / 50 Hz
Standby Power Consumption < 5 W
Flue Type Room sealed (balanced flue)
Control Interface Digital display with rotary dial
Safety Devices Flame failure, overheat, frost protection, pressure relief valve
Maintenance Interval Annual service recommended
Heating System Max Pressure 3 bar
Domestic Hot Water Temp Range 35-65 °C
Central Heating Flow Temp 30-80 °C
Noise Level < 50 dB(A)
Energy Efficiency Class A
Gas Inlet Connection 3/4"
Water Connections 22 mm (flow & return), 15 mm (DHW)
Installation Type Wall mounted
Warranty 2 years (subject to registration)
Repairability Index 7.5/10

Frequently Asked Questions - Komfortek C7-D GL Ursus Trotter

What is the difference between a combi boiler and a system boiler?
A combi boiler heats water on demand for both central heating and domestic hot water, without needing a separate cylinder. The Komfortek C7-D GL is a combi boiler.
How do I reset the boiler after a fault?
Press the reset button on the control panel for 3 seconds. If the fault persists, check the pressure gauge and ensure the gas supply is on.
What should the water pressure be on the gauge?
The ideal pressure is between 1.0 and 1.5 bar when cold. If below 0.5 bar, repressurize using the filling loop.
How do I bleed a radiator?
Turn off the heating, wait for the system to cool, then use a radiator key to open the bleed valve slightly until water dribbles out, then close it.
Why is my hot water temperature fluctuating?
This can be due to low mains water flow, a faulty thermistor, or scaling. Check the inlet filter and ensure the flow rate is at least 10 L/min.
How often should I service the boiler?
An annual service by a qualified engineer is recommended to maintain efficiency and safety. This includes cleaning the heat exchanger and checking flue gases.
What does the 'F1' error code mean?
Code F1 indicates a flame detection failure. Check the gas supply, ignition electrodes, and flame sensor. Contact an engineer if it recurs.
Can I use the boiler without electricity?
No, the boiler requires electricity for the pump, fan, and controls. It will not operate during a power cut.
How do I top up the system pressure?
Locate the filling loop (flexible hose) under the boiler. Open both valves slowly until the gauge reaches 1.0-1.5 bar, then close them tightly.
What type of flue does this boiler use?
The Komfortek C7-D GL uses a balanced flue (room sealed), which draws air from outside and exhausts horizontally through the wall.

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Product information

Brand : Ursus Trotter

Model : Komfortek C7-D GL

Category : Water heaters and boilers