Ideal Logic Heat H12 Boiler Instruction Manual
Ideal Logic Heat H12 Boiler
Ideal Logic Heat H12 Boiler
Ideal Logic Heat H12 Boiler
Ideal Logic Heat H12 Boiler
Ideal Logic Heat H12 Boiler Instructions
Here we offer the Ideal Logic Heat H12 Boiler manual completely free and in English. We have cataloged this manual in the Boilers section on Manualverse, and it has been rated by 1 users with an average rating of 5. If you have any specific questions about Ideal Logic Heat H12 Boiler, we suggest checking the Frequently Asked Questions (FAQs) section of this manual.
Product Images
Ideal Logic Heat H12 Boiler Specifications
| Feature | Specification |
|---|---|
| Boiler Type | Wall-mounted, heat only, fan-assisted, high-efficiency condensing gas boiler |
| G.C. Appliance No. (Benchmark No.) | 41-860-10 |
| Rated Heat Output | 12 kW |
| Nominal Heat Output (ErP), Full Load / Part Load | 12.1 kW / 3.9 kW |
| CH Output, Non-Condensing (70°C mean water temperature) | 4.8 – 12.0 kW |
| CH Output, Condensing (40°C mean water temperature) | 5.1 – 13.0 kW |
| Boiler Input, Net CV (Min / Max) | 4.9 kW / 12.1 kW |
| Boiler Input, Gross CV (Min / Max) | 5.4 kW / 13.4 kW |
| Gas Consumption (Min / Max) | 0.500 m³/h / 1.246 m³/h |
| Seasonal Space Heating Energy Efficiency (ηs) | 93% |
| Seasonal Space Heating Efficiency Class | A |
| Useful Efficiency, Full Load / Part Load | 90.0% / 97.9% |
| SEDBUK 2005 / SEDBUK 2009/2012 | 91.1% / 89.4% |
| Annual Energy Consumption (QHE) | 38 GJ |
| NOx Classification / NOx Emissions (Gross) | Class 6 / 10 mg/kWh |
| Sound Power Level, Indoors (LWA) | 36 dB |
| CO2 Content (±0.7), Max CH / Min CH | 9.1% / 8.5% |
| Average Flue Temperature / Mass Flow Rate | 56°C / 5 g/s |
| Gas Supply | 2H – G20 – 20 mbar (Natural Gas, Category I2H) |
| Gas Supply Connection | 15 mm copper compression |
| Injector Size | 4.15 mm |
| LPG Conversion | Not available for the 12 kW model |
| Flow / Return Connections | 22 mm copper compression |
| CH Flow Temperature Range | 30°C – 80°C |
| Maximum Working Pressure (Sealed Systems) | 2.5 bar (36.3 psi) |
| Water Content | 1.2 litres (0.26 gal) |
| Heat Exchanger Material | Cast aluminium |
| Electrical Supply | 230 V ~ 50 Hz |
| Power Consumption | 16 W |
| Auxiliary Electricity, Full Load / Part Load / Standby | 0.016 kW / 0.011 kW / 0.002 kW |
| Fuse Rating | External: 3 A; Internal: T4A HRC L250 V |
| Ingress Protection | IP20 |
| Flue Type | Room sealed, concentric, C13 / C33 / C53 |
| Flue Terminal Diameter | 100 mm |
| Maximum Effective Flue Length, Horizontal / Vertical | 9.0 m / 7.5 m |
| Flue Elbow Equivalent Length | 45°: 0.6 m; 90°: 1.0 m |
| Casing Dimensions (H x W x D) | 700 x 395 x 278 mm |
| Packaged Weight / Lift Weight | 25.1 kg / 21.9 kg |
| Servicing Clearances | 165 mm above, 100 mm below, 2.5 mm sides, 450 mm front |
| Condensate Drain Outlet | Sized for standard 21.5 mm overflow pipe; 75 mm siphonic trap |
| Warranty | 2 years parts and labour when registered within 30 days (subject to terms) |
Ideal Logic Heat H12 Boiler Details
The Ideal Logic Heat2 H12 is a compact, heat-only condensing boiler. It supplies central heating and, when paired with a separate hot water cylinder, domestic hot water. It uses full sequence automatic spark ignition through a single dual-purpose spark and detection electrode. A 1:1 Honeywell gas valve sets the gas input according to the air flow from the fan. This design lets the boiler deliver its full output at inlet pressures as low as 14 mbar. The appliance is designed, developed and made in the UK. It is also built with a low component count to improve reliability.
The user controls are a temperature knob, a Mode button, a Restart button and a high-resolution status display that uses clear icons and text descriptions. A flame symbol stays on while the burner is lit. Lockouts appear as L codes and faults as F codes. If the boiler fails to light after five attempts, it shows L 02. Pressing Restart five times within 15 minutes triggers L 0C, which clears after the power is switched off and on. In Installer Mode, the display also shows the last three faults.
The boiler has built-in frost protection that works in all modes, provided the boiler has a permanent live supply. It fires when the water temperature drops below 5°C and runs until it reaches 19°C. The boiler also includes Intelligent Load Optimisation to reduce short cycling. If the flow temperature reaches the CH target plus 4°C, the burner switches off. When it relights, it modulates down to minimum over 60 seconds and stays at minimum for 10 minutes.
The boiler works with a wide range of controls. These include the Ideal Halo range, the Link remote monitoring solution, OpenTherm room thermostats and an outside weather compensation sensor. With an outside sensor connected, the knob sets a nominal room temperature between 10°C and 30°C instead of a flow temperature. Without an outside sensor, you can enable 2x Switched Live operation from the menu so that separate inputs handle CH/DHW demand and DHW demand. The boiler is suited to Y-plan and S-plan systems.
The boiler has no integral pump, so the system pump provides circulation. This means the boiler must be installed on a fully pumped open vented or sealed system, never with gravity circulation. On systems at risk of overheat lockouts, Ideal recommends the optional pump overrun kit (221792). It keeps water circulating for 4 minutes after the burner stops. The boiler also runs a fan overrun cycle, which should not be interrupted by isolating the mains supply. The boiler is compatible with the Ideal System Filter.
A siphonic 75 mm condensate trap reduces the risk of the condensate freezing. It must be filled with water before first use and after maintenance. Internal condensate pipework should be at least 19 mm ID. External runs should be at least 30 mm ID, and horizontal runs need a fall of at least 52 mm per metre. If the pipe freezes, the manual advises thawing it with warm water or a heat pack, never boiling water.
The flue can exit through the side, rear or vertically. A rear flue outlet kit (55/80) allows a compact installation on walls 115 to 442 mm thick. Horizontal flue extensions need a 1.5° fall back towards the boiler. The casing is white painted mild steel with a polymer front panel. The boiler can fit into a cupboard with only 5 mm clearance from the door, but you need 450 mm in front of it with the door open for servicing. QR codes in the manual link to how-to videos for servicing.
Ideal recommends an annual service by a Gas Safe Registered engineer, including combustion checks with a CO/CO2 ratio limit of 0.004. The heat exchanger is aluminium, so only approved inhibitors should be used, such as Fernox, Sentinel X100, ADEY MC1, Scalemaster SM-1 PRO or Calmag CM100. The system must not be filled with artificially softened water.
Frequently Asked Questions (FAQs)
Can't find the answer you need? Here are some frequently asked questions about the Ideal Logic Heat H12 Boiler, and we answer them below.
