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Related Manuals for MHS Boilers STRATA 3 220
Summary of Contents for MHS Boilers STRATA 3 220
- Page 1 H I G H O U T P U T , F U L L Y M O D U L A T I N G , F U L L Y C O N D E N S I N G , G A S F I R E D B O I L E R S W I T H S I N G L E U N I T O U T P U T S U P T O 3 3 1 k W I N S T R U C T I O N S F O R I N S T A L L A T I O N , S E R V I C I N G &...
- Page 2 STRATA3 Index page section page section 3 ..1.0 General 17 ..5.7.9 LPG Operation General Notes 5.7.10 Connecting the DHW Certification Details Primary Pump 3-4 ..2.0 Product Description 18 .
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Page 3: General Notes
Strata 3 gas fired condensing boiler. Please read this manual fully before commencing the installation of the appliance. MHS Boilers Ltd shall not be responsible for any damage resulting from failure to carefully observe the instructions given. - Page 4 STRATA3 2.0 product description (contd) Low Noise The Special burner system employed in the Strata 3 boiler is extremely quiet in operation and in many cases it emits less noise than a gas fired atmospheric boiler of equivalent output. Room sealed option If required the boiler may be completely room sealed, taking combustion air directly from outside the building.
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Page 5: Technical Data Table
STRATA3 3.0 technical details 3.1 technical data Table 1 Model Strata 3 Nominal Heat Input (Nett) 42 – 210 63 – 316 Nominal Heat Output @ 80/60°C 40.7 – 203.7 61.1 – 306.5 Nominal Heat Output @ 50/30°C 44.1 – 220.5 66.2 –... -
Page 6: Critical Dimensions
STRATA3 3.2 critical dimensions Fig 3.2a Dimensions in millimetres Table 2 Strata 3-220 Strata 3-330 Depth 1755 1755 Height 1430 1700 Width Height to gas connection 1235 1515 Dimension Gas Inlet Connection 1” BSP M ” BSP M Safety Valve Connection 1”... -
Page 7: Boiler Position
3 is operated on a room air dependent basis in these (or similar) conditions, faults may arise. In this case, no guarantee claim will be accepted. The boiler room must be dry and frost free. boiler plant room Dimensions & Clearances mm Strata 3 220 & 330 1000 1755 Above Boiler Model 220 Above Boiler Model 330 Fig 4.2a... -
Page 8: Flue Systems
STRATA3 4.3 flue systems 4.3 flue systems Strata 3 boilers are fully condensing, fully modulating appliances and it is recommended that each boiler is flued independently, however, it is possible to connect multiple boiler flues together providing no part of the common flue pipe is horizontal. -
Page 9: Hydraulic System Design
STRATA3 4.5 hydraulic system design The Strata 3 boilers are designed to operate on a flow to return temperature drop of 20K (∆t 20°C). Systems must be sealed and pressurised and operate within the range 0.5 bar to 5.3 bar. The system design should incorporate a pressure gauge, visible from the filling point to indicate the system water pressure. -
Page 10: Filling The System
STRATA3 4.5 hydraulic system design (contd) recommended system design typical multiple Strata 3 boiler installation Flow Header Pumps Vertical Low Heating Load Velocity Mixing Header Vmax 0.5m/s Load BLR Pump Return Header Strata 3 Boiler Strainer Fill Point* * Fill Point. In accordance with BS6644, automatic pressurisation unit must be installed BLR Pump Expansion Vessel... -
Page 11: Gas Supply
The boiler is delivered in a fully paletted crate containing the boiler and associated fittings, plus any other optional ancillary control components in separate cartons. The boiler crate contains: Strata 3 220/330 boiler. Assembly, commissioning and maintenance manual. External temperature sensor with screws and plugs. -
Page 12: Positioning The Boiler
See section 4.5 for water treatment product stockists. The central heating flow and return connections are flanged fittings – DN40 PN6 for the Strata 3 220 and DN50 PN6 for the Strata 3 330. The flow and return connections are located at the upper rear of the appliance. -
Page 13: Electrical Connections - General
STRATA3 5.6 condensate waste connections The condensate waste connection is located at the lower rear of the appliance. During the operation of the Strata 3 boiler, because of the low exhaust gas temperatures in both the heating boiler itself and in the exhaust gas system, a slightly acidic condensation water (pH value between 3.5 and 5) is deposited. -
Page 14: Connecting Power Supply
STRATA3 5.7 electrical connections – general (contd) location of electrical points Control Panel Rear Side weiland plug / socket functions Permanent Supply External Gas Safety Room (L1 + PE + N) Shut Off Valve - LPG Thermostat/Volt Only (if reqd) Free Switch (N + PE + L1) (L2 + L1) -
Page 15: External Temperature Sensor
STRATA3 5.7.2 fuses (contd) Fuses 1 and 2 protect the power supply phase and neutral. Fuse 3 protects the entire 24V AC circuit. The 24V AC power supply is rectified in the boiler control panel and controls the fan and supplies the room unit(s) with voltage. - Page 16 STRATA3 Other types of cascade controllers with a continuous 0 to 3V, or 0 to 10V signal can also be connected. An optional adapter is required, for 0 to 10V. See Fig 5.7e (Below) 0 - 10v adaptor To Boiler Socket Nr: 4 Welland Plug Nr: 4 0-10 volt Adaptor...
- Page 17 STRATA3 5.7.7 cascade controller KKM2 (contd) KKM2 sequence controller wiring details HWS Primary Pump 230V ac Heating Pump 230V ac 230Vac Supply Flow Sensor Return Sensor HWS Sensor Outside Air Sensor RE 2132 Room Unit External On/Off Controls Boiler Control Connections For Strata 3 Control Connect to Plug 4 R2 &...
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Page 18: Circuit Diagram
STRATA3 5.7.11 circuit diagram circuit diagram Strata 3 220/330 230V DC 230V DC 230V DC Model 330 Only Fluegas Limit Thermostat 12 VDC Limit thermostat water 12 VDC Primary Boiler Gas Pressure Switch Outside Sensor Room unit Cascade Manager 0-10V (via special adaptor) -
Page 19: Add-On Modules
STRATA3 5.8 Add on Modules 5.8.1 Pump module PR 01 The PR 01 pump control serves to control an additional heating circuit pump (pump 2). Technical Information Supply Voltage – 230V 50Hz (mains from Strata 3 appliance) Maximum contact load – 2A Maximum contact rating –... - Page 20 STRATA3 5.8.1 Pump module PR 01 (contd) PR 01 NETZ PUMPE 2 System heating pump Pump 2 Power Supply Control Panel Wiring Weiland Plug 3 L1 PE N L2 Cable sets are supplied, labeled, and approximately 140cm in length Fig 5.8a...
- Page 21 STRATA3 5.8.2 mixer module MR 03 The mixer module MR 03 is used if a standard heating circuit (eg for normal temperatures for radiators) and a mixed heating circuit (eg for under floor heating 55/45°C) with different flow temperatures are connected to the Strata 3.
- Page 22 STRATA3 5.8.2 installation and elect connection – MR 03 The MR 03 must be connected in accordance with the schematic diagram – fig 5.8e. MR 03 SENSOR 7 NETZ PUMP 3 PUMP 2 2 R4 R5 R6 PUMP 3 PUMP 2 Underfloor System Heating Pump...
- Page 23 STRATA3 5.8.2 installation and elect connection – MR 03 There are 3 options for room temperature:- Both circuits, weather variable, without room control influence. Room control influence with one room controller for the entire building – must be electrically connected direct to the boiler. Weiland Plug 4. Independent room influence control with 2 room units (one for the radiator circuit –...
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Page 24: Filling The Boiler
STRATA3 S1 Flow Temperature Sensor S4 Return Temperature Sensor S5 Domestic Hot Water Temperature Sensor S6 Outside Temperature Sensor (KKM2) S7 MR03 Mixed Flow Sensor AF Outside Temperature Sensor (Boiler) 6.0 commissioning & testing The Strata 3 should be commissioned by a competent engineer. Before commissioning the appliance, the whole gas installation including the meter MUST be purged and tested for gas soundness in accordance with IGE/UP/1. -
Page 25: Appliance Operation
STRATA3 6.2 appliance operation The start of operation of the Strata 3 heating boiler should commence only after the following points have been checked: Flue system Check that the flue system is correctly assembled. Ensure that the connections for the condensate drain are water tight and the condensate can be freely drained. - Page 26 STRATA3 6.3 initial lighting/commissioning (contd) Turn on the appliance ON/OFF switch The Strata 3 begins with a two minute de-aeration program. After this 2 minute program the appliance will start. If the Strata 3 does not start up and the message IGNITION FAILED is flashing on the status indicator on the display panel, press the red re-set button to allow up to four further automatic ignition attempts.
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Page 27: Potentiometer Adjustments
The nominal heat output for the boiler can be limited if required to any value between 42kW and 210kW for the Strata 3 220 and between 63kW and 316kW for the Strata 3 330. The maximum output continues to be available for domestic hot water production. - Page 28 STRATA3 6.4.2 setting weather compensation (contd) default compensation slope Dip Switch Settings When compensation req'd outside sensor must be installed and dip switch No.2 set to "ON". Max Flow Temperature Slope A - Dip 6 ON & Dip 7 OFF Slope B - Dip 6 OFF &...
- Page 29 STRATA3 6.4.2 setting weather compensation (contd) range of parallel displacement of slope B BLUE BLUE +5 +10 +15 +20 +25 Outside Air Temperature ºC Fig 6.4c range of parallel displacement of slope C BLUE BLUE +5 +10 +15 +20 +25 Outside Air Temperature ºC Fig 6.4d...
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Page 30: Switching Off The Appliance
STRATA3 6.4.3 adjusting the fixed point of the mixer circuit If the MR 03 mixer control is connected to the Strata 3, the fixed point of the heating curve of the mixer can be adjusted. Press the red ‘reset’ button. On the lower line in the display, the supply flow temperature T1 of the sensor S1 is displayed. -
Page 31: Screen Display
STRATA3 6.6 screen display The screen display indicates information about the operating condition of the Strata 3 in plain text. The displays are distinguished as operation messages (non flashing) and fault messages (flashing). 6.6.1 operation messages (non flashing) In the case of the following status signals, the Strata 3 is in normal operating mode. Standby No heat demand (boiler not required to be on) Pre-Purge... -
Page 32: Engineers Button
In this position, the loading can be adjusted, with the green potentiometer, between 42kW and 210kW (Strata 3 220) or 63kW and 316kW (Strata 3 330). By pressing the 'Engineers' button during the display of (10 MIN LOW), the Strata 3 switches back into automatic operation. - Page 33 STRATA3 7.1 adapting the control to the heating system (contd) One Screw One Screw Casing Cross Member Fig 7.1b The following specifications must be adjusted: Whether the boiler is to be controlled with direct weather compensation. Whether an underfloor mixer circuit is connected. Whether a room unit, cascade control or a volt free switch are connected.
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Page 34: Dip Switch Settings
STRATA3 7.2 DIP switch settings Dip Switch 1 No Mixing Valve Control Fitted Underfloor Zone Mixing Valve Control Fitted (MR03) Dip Switches 6 & 7 (system operating temperature) Dip Switch 6 6 OFF 7 OFF Low Temp 55ºC Radiator Circuit (mt 70/50ºC) Radiator Circuit (ht 85/65ºC) 6 OFF 7 ON Med Temp 70ºC 6 ON 7 OFF High Temp 85ºC... -
Page 35: Maintenance Procedure
2. We recommend that the fault data from the boiler control panel be read via a lap top computer and RS-232 interface. The service software is available from MHS Boilers Ltd. The cause of frequent faults must be identified and corrected. -
Page 36: Fault List
STRATA3 9.0 fault diagnosis 9.1 fault list Possible faults are entered in the following tables. The right column contains the corresponding line numbers of the error correction list – see section 9.2. The error correction list contains possible causes as well as information about the elimination of the fault. Error correction list line Fault Indication on the Display Type of fault... - Page 37 STRATA3 9.2 error correction list The error correction list contains possible causes as well as information about the elimination of the fault. Line Number Cause of the Fault Remedy DIP switch not correctly set Adjust according to the instructions Room unit KKM2 not connected correctly Check wiring Sensor not connected correctly or defective Measure resistance, replace where appropriate...
- Page 38 STRATA3 10.0 guarantees The boiler body and exhaust system both carry a five year guarantee against defect in material or manufacturing process. The burners and all electrical components and other component parts carry a one year guarantee. This guarantee only applies if correct commissioning and regular maintenance has been carried out.
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Page 39: Parts List
STRATA3 11.0 parts list Strata 3 220... - Page 40 STRATA3 11.0 parts list (contd) Strata 3 220...
- Page 41 STRATA3 11.0 parts list (contd) Strata 3 220...
- Page 42 STRATA3 11.0 parts list (contd) Strata 3 220...
- Page 43 STRATA3 11.0 parts list (contd) Strata 3 330...
- Page 44 STRATA3 11.0 parts list (contd) Strata 3 330...
- Page 45 STRATA3 11.0 parts list (contd) Strata 3 330...
- Page 46 STRATA3 11.0 parts list (contd) Strata 3 330...
- Page 47 QW/1101/4511 A member of the Modular Heating Group Plc 35 Nobel Square, Burnt Mills Industrial Estate, Basildon, Essex SS13 1LT Tel: 01268 591010 Fax: 01268 728202 www.mhsboilers.com This publication is issued subject to alteration or withdrawal without notice. The illustrations and specifications are not binding in detail. All offers and sales are subject to the Company's current terms and conditions of sale.
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