Related Manuals for Stuart Turner Mikrofill ETHOS 350
Summary of Contents for Stuart Turner Mikrofill ETHOS 350
- Page 1 B O I L E R S C O N D E N S I N G E T HOS 350 & 550 F LO O R STA N D I N G CO N D E N S I N G B O I L E R S T E C H N I CA L D O C U M E N TAT I O N 20 2 3/ 02 R E V.
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Page 3: Table Of Contents
TA B L E O F C O N T E N T S 01. Technical Data 07. Operating Instructions Operation 02. Dimensions Controls Boiler Module 03. Safety Guidelines PCB Symbol Key Conditions Switching On the Appliance General Guidelines Switching Off the Appliance Service Information Display General Restrictions... -
Page 4: Technical Data
T E C H N I C A L DATA GENERAL Dimensions (Height x Width x Depth) 1300 x 750 x 1100 1300 x 750 x 1500 ETHOS 350 ETHOS 550 Model Water Content of Appliance litre Weight (Empty) Flow / Return Connections DN50 PN16 Flange DN65 PN16 Flange Gas Connection... -
Page 5: Dimensions
D I M E N S I O N S • All dimensions are in millimetres unless otherwise specified. • Depth dimensions are taken from the front to the rear of the casing and do not include the external pipework. •... -
Page 6: Safety Guidelines
S A F E T Y G U I D E L I N E S CONDITIONS Mikrofill Systems Ltd. shall not be liable for any damages caused by non-compliance with this manuals instructions. Only original parts must be used for service purposes. GENERAL GUIDELINES The appliance is not intended for use by persons (including children) with reduced mental, physical or sensory capabilities, or lack of experience or knowledge, unless they have been given supervision or instruction... -
Page 7: Service
S A F E T Y G U I D E L I N E S SERVICE Should you require any assistance during installation or in the unlikely event of a product failure please do not hesitate to contact our technical department on 03452 60 60 20. GENERAL RESTRICTIONS Mikrofill products should always be used, installed and maintained in accordance with the statutory requirements, specifications and standards applicable to these installations. -
Page 8: Description
D E S C R I P T I O N GENERAL The Mikrofill ETHOS floor standing boilers are environmentally friendly gas fired heating boilers with a modulation range between approximately 10% and 100% of their maximum output. The appliances have low NO CO emission, which satisfies the most stringent environmental requirements. -
Page 9: Main Components
D E S C R I P T I O N FRONT VIEW: BACK VIEW: BOTTOM CONNECTIONS: MAIN COMPONENTS: Burner #00 Control Unit Burner #01 Control Unit Combustion Fan Control Fascia Electrical Connections Gas Valve Heat Exchanger and Burner Package Flap Valve Venturi REAR CONNECTIONS:... -
Page 10: Boiler Control
D E S C R I P T I O N BOILER CONTROL If there is a heat demand, and if all necessary conditions have been fulfilled and all safety devices are satisfied, the boiler will start. This heat requirement will arise if: •... -
Page 11: Delivery & Transport
D E L I V E RY & T R A N S P O RT DELIVERY The boiler is delivered fully assembled, tested and packed. • Check the boiler for damage upon receipt. • Check whether the items delivered are correct and in accordance with the items ordered. TRANSPORT The packing should only be removed after transportation. -
Page 12: Installation
I N S TA L L AT I O N REGULATIONS The appliance should be installed by a competent installer in accordance with the applicable national and local standards, rules and regulations (please refer to pages 06 and 07 for safety guidelines). INSTALLATION GUIDELINES The following guidelines should be complied with;... -
Page 13: Ventilation
I N S TA L L AT I O N VENTILATION The ventilation of the installation room should conform to current gas regulations. GAS CONNECTION The gas connection is located on the rear of the appliance (see page 09). It should be installed by a competent installer in accordance with the applicable national standards. -
Page 14: Internal Controls Breakdown (Main Pcb)
I N S TA L L AT I O N INTERNAL CONTROLS BREAKDOWN (MAIN PCB) 01 02 03 01 02 03 04 05 01 02 04 05 06 06 07 08 09 10 03 04 ▲ FIGURE 02. TOP VIEW OF MAIN PCB. •... -
Page 15: Internal Controls Breakdown (Control Fascia)
I N S TA L L AT I O N INTERNAL CONTROLS BREAKDOWN (CONTROL FASCIA) ▲ FIGURE 03. TOP VIEW OF CONTROL FASCIA. • X01 Pin 01: Control Fascia to Main PCB • X03 Pin 02: Communication with Master • X05 Pin 01: Alarm Output •... -
Page 16: Controls And Options
I N S TA L L AT I O N CONTROLS AND OPTIONS The boiler features an automatic fully modulating control system and as such can be used as a ‘stand alone’ appliance. The standard controls include; • 0 - 10 V Input ready. •... -
Page 17: Flue Connection
I N S TA L L AT I O N FLUE CONNECTION The flue gas discharge outlet system should be installed by a competent installer according to applicable national and local standards and specifications. Care should also be taken to ensure compliance with the Clean Air Act. -
Page 18: Flue Length
I N S TA L L AT I O N FLUE LENGTH Since the boiler is equipped with a ‘premix burner’ with a fan, an over pressure is created in the boiler. This over pressure is sufficient to overcome the resistance of the burner, the heat exchanger and the chimney. The back pressure on the boiler depends on: •... -
Page 19: Condense Connections
I N S TA L L AT I O N CONDENSE CONNECTIONS The boiler includes an anti syphon condense trap enabling the condense pipework to be taken directly to drain. The condense water is slightly acidic (pH 3.0 - 5.5) and should be run in a standard drain pipe material, e.g. -
Page 20: Shut-Off Valves
I N S TA L L AT I O N SHUT-OFF VALVES It is recommended that manual valves should be installed between the flow and return connections to the installation. VALVES (BOILERS IN CASCADE ARRANGEMENT) To prevent water flow through non-firing boilers, and hence unnecessary heat loss, a spring loaded non-return valve may be installed on the return pipework external to the boiler. -
Page 21: Water Pressure
I N S TA L L AT I O N WATER PRESSURE At a maximum flow temperature of 90°C and with the nominal water flow that occurs at a ΔT of 20°K, the minimum operating pressure should be at least 1.5 bar. The operating pressure should be measured when the external pump is switched off. -
Page 22: Water Hardness
I N S TA L L AT I O N WATER HARDNESS Water hardness levels are caused by dissolved minerals in the water and will vary geographically. The harder the water, the more likely that problems with precipitation (limescale deposits) will occur, causing permanent damage to the boiler and associated equipment. -
Page 23: Boiler Module
O P E R AT I N G I N S T R U C T I O N S BOILER MODULE RESET RESET DHW Selection Heating Selection Multi-Function Reset Switch DHW Temperature Heating Temperature Power Switch PCB SYMBOL KEY - OpenTherm Connection - Heating Circuit Active - Information... -
Page 24: Switching On The Appliance
O P E R AT I N G I N S T R U C T I O N S WARNING: • The appliance should be installed by a competent installer. • These operating instructions should be closely followed. • If the cause of any fault cannot be determined, please contact the technical department. •... -
Page 25: Information Display
O P E R AT I N G I N S T R U C T I O N S INFORMATION DISPLAY: RESET RESET DHW OPERATION • DHW Mode can be enabled or disabled by using the button. • The DHW setpoint can be increased or decreased by using the buttons. -
Page 26: History Mode
O P E R AT I N G I N S T R U C T I O N S HISTORY MODE • To access history mode, press and hold until the display shows ‘Bu 0’. • Press the button and the display will flash ‘Hi 0’. •... -
Page 27: Possible Error Codes Continued
O P E R AT I N G I N S T R U C T I O N S POSSIBLE ERROR CODES continued. ERROR CODE DESCRIPTION RESOLUTION 0E33 DHW sensor open circuit. The DHW sensor is registering an open circuit. Check the connection to the sensor and replace the sensor if necessary. -
Page 28: Commissioning
C OM M I SS I O N I N G GENERAL The commissioning should only be carried out by qualified personnel. The guarantee may be void if this is not adhered to. Before operating the appliance, the following should be done: •... -
Page 29: Maximum Load Adjustment
C OM M I SS I O N I N G MAXIMUM LOAD ADJUSTMENT Press and hold the button for three seconds until the below display appears, the boiler will then start to operate at minimum load. To adjust to maximum rate, press and hold until the below display appears, the boiler will then start to operate at maximum load. -
Page 30: Setting The Co 2 Value For The Ethos Range
C OM M I SS I O N I N G SETTING THE CO VALUE FOR THE ETHOS RANGE • Any adjustments should only be carried out by competent persons. • After adjustment of the gas valve the adjusters must be resealed. There is a setting screw on the gas valve with which the CO value can be set at maximum load. -
Page 31: Conversion From Natural Gas To Propane
C OM M I SS I O N I N G CONVERSION FROM NATURAL GAS TO PROPANE For natural gas to propane conversion, it is only necessary to change the gas volume by altering the CO values as described on pages 28 - 30. C AS C A D E S E T - U P AUTO DETECTION MODE Cascade structure will need to be auto detected prior to cascading the boilers. -
Page 32: Cascade Test Mode
C AS C A D E S E T - U P CASCADE TEST MODE • Press and hold the buttons together for three seconds. • This will send a request to the master boiler to fire all slave boilers. •... -
Page 33: Maintenance
M A I N T E N A N C E SAFETY Maintenance should only be carried out by competent persons. Always isolate the gas supply at the gas service valve and isolate and disconnect the electrical supply prior to the removal of any components. Ensure that all external controls are isolated. -
Page 34: Removal Of Gas Valve And Venturi
M A I N T E N A N C E REMOVAL OF GAS VALVE AND VENTURI • Isolate the gas and electrical supplies to the boiler. • Remove the four screws from the flange on the rear of the gas valve ( •... -
Page 35: Removal Of Fan And Burner Assembly
M A I N T E N A N C E REMOVAL OF FAN AND BURNER ASSEMBLY • Isolate the gas and electrical supplies to the boiler. • Remove the caps from the ignition electrode and ionisation probe. • Remove the two electrical connections from the fan. Remove the gas valve and venturi as described on page 34. -
Page 36: Setting / Checking Of Electrode And Probe Gaps
M A I N T E N A N C E SETTING / CHECKING OF IGNITION ELECTRODE AND IONISATION PROBE GAPS In addition to the annual maintenance, please ensure the following is carried out: • Isolate the gas and electrical supplies to the boiler. •... -
Page 37: Component List
C OM P O N E N T L I S T Any components within the ETHOS 350 - 550 that may require replacing have been listed in this section, along with their respective part codes. If any part needs replacing which is not listed here, please contact our technical department on 03452 60 60 20 for assistance. - Page 38 x 06 x 06 ▲ FIGURE 09. EXPLODED DRAWING DETAILING THE CORE COMPONENTS OF THE ETHOS 350 - 550. “(PART CODE) PART NAME”: (EFD000006) AIR VENT VALVE (GAV920001) GAS VALVE (WHB200038) OVERHEAT STAT (⅜” MALE) (ETHOS 350) (REAR OF HEAT EXCHANGER) (FSB500089) BURNER DOOR COMPLETE (FSB600006) GAS VALVE (FSB500090) P TRAP COMPLETE...
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Page 39: Conversion Formulae & Factors
C O N V E R S I O N F O R M U L A E & FAC T O R S FORMULAE 20.9 - measured O measured CO x 20.9 x 11.7 = 20.9 - 20.9 11.7 11.7% CO is the maximum CO percentage that is generated by stoichiometric burning of G20 natural gas... - Page 40 C O N V E R S I O N F O R M U L A E & FAC T O R S FOR NON-CONDENSING BOILERS: 0.339 0.377 nb = 90 - + 0.008 x ΔT no = 100 - + 0.009 x ΔT FOR CONDENSING BOILERS:...
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Page 41: Notes
N O T E S T E C H N I CA L D O C U M E N TAT I O N 41... - Page 42 N O T E S 4 2 T E C H N I CA L D O C U M E N TAT I O N...
- Page 43 ISO 9001 Registered Quality Management...
- Page 44 Mikrofill Systems Ltd. 11 Merse Road, North Moons Moat, Redditch, Worcestershire B98 9HL, UK +44 (0)3452 60 60 20 +44 (0)3452 60 60 21 www.mikrofill.com info@mikrofill.com...
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