Ultracom 30hxi - Chauffe-eau et chaudière Glow-worm - Free user manual and instructions
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| Product Type | Combi Boiler (Heating & Hot Water) |
| Brand | Glow-worm |
| Model | Ultracom 30hxi |
| Heating Output (Max) | 30 kW |
| DHW Output (Max) | 30 kW |
| Efficiency (SEDBUK) | Band A, ~90% |
| Fuel Type | Natural Gas (G20) |
| Dimensions (H x W x D) | 700 mm x 400 mm x 300 mm |
| Weight | 32 kg |
| Power Supply | 230 V / 50 Hz |
| Electrical Protection | IPX4 |
| Expansion Vessel Capacity | 8 litres |
| Max Water Pressure (CH) | 3 bar |
| DHW Flow Rate (ΔT 35°C) | 12.3 l/min |
| Flue Type | Room-sealed, concentric 60/100 mm |
| NOx Class | Class 5 |
| Main Functions | Central heating, domestic hot water, frost protection, pump anti-seize |
| Controls | Digital display, rotary dials for CH & DHW |
| Maintenance | Annual service by qualified engineer; clean main burner and heat exchanger |
| Safety Features | Flame failure device, overheat thermostat, safety valve, low water pressure cutoff |
| Spare Parts Availability | Common parts available via Glow-worm distributors |
| Warranty | Up to 5 years with annual service |
Frequently Asked Questions - Ultracom 30hxi Glow-worm
What does the error code E110 mean on my Glow-worm Ultracom 30hxi?
Error E110 indicates a flue sensor fault. Check the flue thermistor and its wiring. If the issue persists, contact a Gas Safe registered engineer.
How do I repressurise the system if the pressure is too low?
Locate the filling loop under the boiler. Open both valves slowly until the pressure gauge reads between 1.0 and 1.5 bar. Then close both valves.
What should the central heating temperature be set to?
For a condensing boiler, set the CH flow temperature to 65-70°C for optimal efficiency. Higher temperatures reduce efficiency.
Why does my boiler keep losing pressure?
Common causes include a system leak, faulty pressure relief valve, or failed expansion vessel. Check for visible leaks and contact an engineer if the problem persists.
How often should the boiler be serviced?
Annual servicing by a Gas Safe registered engineer is recommended to maintain warranty and safety. The service includes cleaning the heat exchanger and checking gas pressure.
Can I run the boiler without water in the system?
No, running the boiler dry can cause severe damage to the heat exchanger. Ensure the system is pressurised before operation.
What type of flue is used for the Ultracom 30hxi?
The boiler uses a room-sealed concentric flue (60/100mm). The flue can be routed horizontally or vertically depending on installation.
How do I reset the boiler after a lockout?
Press and hold the reset button (usually marked with a flame symbol) for 3 seconds. If lockout recurs, check for underlying faults.
What is the maximum hot water flow rate?
The boiler can deliver up to 12.3 litres per minute at a 35°C temperature rise. Actual flow depends on mains pressure.
How do I adjust the domestic hot water temperature?
Turn the DHW dial on the control panel. The temperature range is typically 35-60°C. Set to your preference, but avoid scalding risk.
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