Zeus Mini Instructions IMMERGAS ZEUS MINI Instruction Booklet Wall Mounted, Room Sealed, Gas Fired Combination Boiler with Unvented Hot Water Storage Read these instructions completely before using or installing the Immergas Zeus Mini gas boiler LEAVE THESE INSTRUCTIONS WITH THE USER For Technical assistance, spare parts or for Service call: RVR Limited, Kenmare, Co. Kerry Tel: 064 41344, Fax: 064 89520 Doc. Ref.
Zeus Mini Instructions Introduction The Immergas Zeus Mini boiler is a wall mounted, fan assisted room-sealed combination boiler, incorporating a 45 litre unvented hot water storage cylinder. Heat output is controlled by a modulating gas valve, with fully automatic direct burner ignition. The boiler, providing both central heating and domestic hot water supply, is designed for use with a fully pumped, sealed and pressurised heating system using Natural Gas or LPG.
Zeus Mini Instructions PERFORMANCE: Nominal Heat Input Min. Heat Input Nominal Heat Output (useful) Min. Heat Output GAS: Nozzle diam.
Zeus Mini Instructions Main Boiler Components Cold Water IN Hot Water OUT C H Flow C H Return Gas 1 – Negative pressure test point 2 – Positive pressure test point 3 – Test opening A=air F=flue 4 – Air pressure switch 5 –NTC thermistor 6 – Over heat safety device 7 – Primary heat exchanger 8 – Ignition - detection electrodes 9 – Combustion chamber 10 – Burner 11- Automatic air vent 12- Circulating pump 13- Gas valve 14- Motorized 3 way valve 15- Filling valve 16- Expansion vessel 17- D.H.W.
Zeus Mini Instructions General Installation Information Gas Supply The meter and supply pipes must be sized to deliver the gas rate and pressure given on page 3. The boiler requires at least a 22 mm (3/4”) gas supply pipe. The complete installation, including the meter, must be tested for gas soundness and purged as described in IS 813:2002. Electrical Installation The boiler requires a 220/240 V ~ 50 Hz mains supply, fused at 3 A.
Zeus Mini Instructions Extended Flue Systems It is often necessary to install a longer flue system to cater for site conditions. There are several different flue system sizes available for the Zeus Mini boiler. Horizontal concentric kit 60 /100 The exhaust pipe (φ 60 mm) is fitted inside the air intake pipe (φ 100 mm). Connection to the boiler is made using a 90° bend (1) which can be turned in any direction and can be connected to the terminal (2).
Zeus Mini Instructions Flue calculations for more complex systems Each component of the air inlet/flue system has a resistance factor . These are given in the following tables. The resistance factor varies depending on whether the component in question is conveys fresh inlet air or hot combustion gases. All boilers have a maximum resistance factor of 100. The sum of all components in the flue system must not exceed the maximum overall resistance factor of 100.
Zeus Mini Instructions Example: Flue system consists of 9m of 80mm air intake pipe with 3 x 90 bends and 6m of exhaust pipe with 2 x 90 bends. Component Resistances: Component Resistance Quantity Total 80mm Intake pipe 2.3 9 20.7 90˚ air intake bend 5 3 15 80mm Flue pipe 3 6 18 90˚ Flue bend 6.5 3 19.5 In this case the total resistance of the system is less than 100. The flue design is acceptable.
Zeus Mini Instructions Terminal Position Min. Distance A Directly below an opening, air brick, windows, etc.
Zeus Mini Instructions Central Heating System The boiler is designed for use in a sealed central heating system. The system should be designed to operate with flow temperatures of up to 80°C. When designing the system, the pump head, expansion vessel size, mean radiator temperature, etc. must be taken into account. The pressure losses in the system must be compatible with the boiler circulation pump. See pump performance graph below.
Zeus Mini Instructions The most important components of the system are shown in the diagram below. • The cold water supply for the water heating side of the system may come from a booster pump or the cold water mains where this is permitted by the local authority. • A non-return valve must be installed on the cold feed to the boiler. This prevents expanding hot water back-feeding into the cold side of the system.
Zeus Mini Instructions Domestic Hot Water System Mains water pressurised unvented system are generally not permitted in Ireland. A cold water storage tank and a pressure boosting pump will normally provide a pressurised cold water supply. The pressurisation pump should provide a water pressure of between 1 and 3 bar. However, all taps and mixing valves used with the hot water system must be suitable for operating at a pressure of up to 5.5 bar.
Zeus Mini Instructions Tundish installation The discharge pipework from the tundish:1. Shall fall continuously through its length. 2. Shall be of a heat resistant material, e.g. metal. 3. Shall not be fitted with any valves or taps. 4. Shall discharge to a safe visible position, e.g. onto the surface of an external wall or into a gulley. 5. Shall have a minimum of 300 mm straight pipework directly from the tundish.
Zeus Mini Instructions Operation and Maintainance Instructions An annual maintenance of the boiler and heating system is recommended. This ensures that the optimal safety, performance and operation characteristics of the boiler remain unchanged over time. Warnings Never expose the wall-mounted boiler to direct vapours from a cooking surface. Use of the boiler by unskilled persons or children is strictly prohibited.
Zeus Mini Instructions Troubleshooting Ignition lockout. Each time heating or hot water production is required the boiler is turned on automatically. If this does not occur within 10 seconds, the boiler activates an “ignition lockout” (red indicator lamp 2 ON). To eliminate the lockout, rotate the main switch (3) temporarily to the Reset position. On initial ignition or following a prolonged period of disuse the ignition lockout may occur several times.
Zeus Mini Instructions Annual maintainance procedures The following checks and maintenance should be performed at least once a year. - Clean the flue side of the heat exchanger. - Clean the main burner. - Make a visual inspection of the flue extraction hood for wear or corrosion. - Ensure correct ignition and operation. - Ensure correct settings of the burner in domestic water and heating modes.
Zeus Mini Instructions N.B.: Pressure values specified in the table indicate the difference of pressure values between the gas valve outlet and the combustion chamber. Adjustments are carried out using a differential pressure gauge.
