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Guidance on suitable installation sites, conditions, and safety for the boiler.
Requirements and procedures for gas, hydraulic, and electrical connections.
Guidance on routine cleaning and essential maintenance procedures for optimal performance.
Crucial safety precautions and general advice for safe boiler operation.
Interpretation of error codes and indicator lights for troubleshooting.
Common issues, their causes, and recommended solutions for the boiler.
Steps and precautions for converting the boiler to use different gas types.
Procedures for adjusting the gas valve for minimum and nominal heating power.
Guide to accessing and modifying boiler operating parameters.
Comprehensive checklist for annual boiler inspection and maintenance.
Table detailing heat power and gas flow rate specifications.
Technical data on combustion parameters like gas nozzle diameter.
Comprehensive table of technical specifications and performance data.
The Immergas Zeus 24 - 28 kW is a wall-mounted, accumulation-type boiler designed for heating environments and producing domestic hot water. It features a 45-liter stainless steel boiler with a large coiled heat exchanger pipe, which significantly reduces hot water production times. The boiler is built with stainless steel casing and bottoms, ensuring long durability. Assembly concepts and welding (T.I.G.) are implemented to ensure maximum reliability. An important feature is the lower inspection flange, which allows for practical control of the boiler and coiled heat exchanger, as well as easy internal cleaning. Domestic water attachments are located on the flange cover (cold inlet and hot outlet), and a magnesium anode holder cap is included as standard for internal protection against corrosion.
The Zeus kW boiler is designed exclusively for wall-mounted installation. It can be installed in various configurations, affecting its classification:
The boiler can be installed outside in a partially protected area, meaning it is not exposed to direct weather conditions like rain, snow, or hail. For B-type configurations in partially protected locations, a specific terminal (present in the intake kit) must be used, placed on the central hole of the boiler. Air intake occurs directly from the environment, and fumes are expelled into an individual flue or directly outside. The flue pipe (vertical or horizontal) can be extended up to a maximum length of 12 meters for straight routes using insulated pipes. However, to prevent fume condensation, the length of the Ø 80 exhaust pipe should be limited to 5 meters if not insulated. For C-type configurations indoors, the boiler must only be installed with an original Immergas air intake and fume extraction system, identifiable by a specific marking indicating "not for condensing boilers." Fume exhaust pipes must not contact or be near flammable materials or cross building structures made of flammable materials.
The boiler supports various fume extraction system components, each with a Resistance Factor. This allows for calculations to verify the feasibility of different flue extraction system configurations. For correct positioning of lip seals on elbows and extensions, specific assembly directions must be followed. The fumes separator, located on the air/fumes extraction well, must be adjusted based on the type and extension of the pipework.
The Zeus kW boiler has an IPX4D protection rating. Electrical safety is ensured by correct connection to an efficient earthing system. The manufacturer emphasizes that failure to connect to an efficient earth system or comply with standards voids responsibility for damage or injury. The electrical installation must match the maximum absorbed power specifications on the boiler data-plate. Boilers are supplied with an "X" type power cable without a plug, requiring connection to a 230V ±10%/50Hz mains supply, respecting L-N polarity and earth connection. The network must also have a multi-pole circuit breaker with a class III over-voltage category. For mains fuse replacement on the control card, a 3.15A quick-blow fuse is required. Adapters, multiple sockets, or extension leads should never be used for the main power supply.
Before connecting the boiler, the heating system (pipes, radiators, etc.) must be thoroughly cleaned with special pickling or de-scaling products to remove deposits that could compromise boiler operation. Water connections should be made rationally using the couplings on the boiler template. The safety valve outlet must be connected to a discharge funnel to prevent flooding if the valve activates. The manufacturer disclaims liability for damage caused by the installation of an automatic filling system. To preserve the life and efficiency of the domestic hot water exchanger, installing a "polyphosphate proportioner" kit is recommended in areas with water characteristics that may cause scale deposits.
The boiler is designed to operate with methane gas (G20) and LPG (II2H3+ category). Supply pipes must be 1/2"G or larger. Before connecting, all fuel feed system pipes must be cleaned to remove residues. The gas type must match the boiler's preparation (as per the data-plate), or the appliance must be converted. Dynamic gas supply pressure must also be checked, as insufficient levels can reduce output. The gas supply pipe must be dimensioned according to regulations to ensure correct gas flow even at maximum generator output. The appliance is designed for gas free of impurities; if impurities are present, special filters should be fitted upstream. New LPG storage tanks may contain residual inert gases that degrade the mixture, and layering of LPG components can occur during storage, affecting heating power.
The boiler features a control panel with various LEDs and selector switches for different functions.
Before ignition, ensure the heating system is filled to 1-1.2 bar pressure, the gas cock is open, and the main selector switch (9) is in the desired position (Domestic/Remote Friend ControlV2 or Domestic Hot Water). A fixed light on LEDs 4-8 indicates voltage presence and output water temperature. If LEDs 4-8 flash, an anomaly is present. Domestic water and heating modes are indicated by fixed lights on LED 2 or LED 3.
The boiler signals anomalies by flashing LEDs 4-8 or LEDs 1 and 2 coupled with LED 7. Remote controls display numerical error codes (e.g., E.g. CARV2 = Exx, CRD = xxE).
The Zeus kW boiler allows programming several operation parameters to adapt to specific needs. To access programming, position the main selector switch on "Reset" for 15-20 seconds until LEDs 2 and 3 flash, then re-position to "domestic water and heating." Parameters are selected by turning the domestic hot water temperature selector switch (10).
When activated, this function forces the boiler to run at maximum output for 15 minutes, overriding all adjustments except the temperature safety thermostat and limit thermostat. It is activated by pressing the "Reset" key for 8-15 seconds in the absence of domestic water and heating requests, indicated by simultaneous flashing of LEDs (2) and (3). This allows technicians to check combustion parameters.
General| Energy Efficiency Class | A |
|---|---|
| Fuel Type | Natural gas / LPG |
| Efficiency | Up to 98% |
| Hydraulic connections | 3/4" (DHW) |
| Hot Water Production | Continuous flow |
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