Page 1 MERLEY BOILER SEQUENCE CONTROLLER For Modular Boiler Installations Installation, Commissioning and Operating Instructions IMPORTANT NOTE THESE INSTRUCTIONS MUST BE READ AND UNDERSTOOD BEFORE INSTALLING, COMMISSIONING, OPERATING OR SERVICING EQUIPMENT...
Page 3 For Modular Boiler Installations Installation, Commissioning and Operating Instructions NOTE: THESE INSTRUCTIONS SHOULD BE READ AND UNDERSTOOD BEFORE ATTEMPTING TO INSTALL, COMMISSION OR OPERATE THIS UNIT PUBLICATION NO. 500001210 ISSUE ‘D’ June 2022 HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 4: Table Of Contents
6.15 Input / Output Tests 6.16 State 6.17 Diagnostics heat generation 6.18 Diagnostics consumer 6.19 List of Displays 7.0 Plant Diagrams ......................84 7.1 Basic Diagrams 7.2 Extra Functions - DHW - Low Loss Header HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 5 Figure A2 Cascade with primary circuit pump Appendix B: Wiring Schematics ………..…………………………………………………………………... Figure B1 RVS Wiring Figure B2 Wireless Configuration Appendix C: Programming Parameters .…………………………...……………….………101 Appendix D: Wiring for Primary Pump when using Cascade Controller ....….104 HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 6: General Overview
Alternatively, the Merley is suitable for incorporating into a local control panel (not HHL supply), requiring a Din rail to mount the plc logic control and a cutout in the panel door to accommodate the user display screen.
Page 7: Description
- Actual Value TA - Outside Temperature w - Nominal Value 1.3 Product Range The following Merley Boiler Sequence Controller kits and accessories are designed for use with the Hamworthy Range of boilers using Siemens LMU controls HHL Reference Description...
Page 8: System Configurations
Telephone Toutside Repeater wireless wireless wireless BSB-RF OCI611 OCI700 BSB-W Extension module Basic Unit mod. AVS75… RVSxx (max. 2) BSB : Boiler System Bus Basic Unit RVS... LPB : Local Process Bus HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 9: Mounting And Installation
Radio module AVS71… 2.0 Mounting and Installation 2.1 Electrical installation • Prior to installing the Merley Boiler Sequence Controller, the power supply must be turned off • The connections for mains and low-voltage must be separated • The wiring must be made in compliance with the requirements of safety class II. This means that sensor and mains cables must not be run in the same duct •...
Page 10: General Requirements
RVS63… 2.3.1 Pre-assembled wall mounted panel Should the Merley be supplied in the pre-assembled HHL panel, the panel should be located in a readily accessible position and the following requirements observed; • External fuses should be rated for 10A •...
Page 11: Electrical Connections
The controller may not be exposed to dripping water. • Permissible ambient temperature when mounted and when ready to operate: 0..50°C. • Power cables must be clearly segregated from low-voltage cables (sensors) observing a distance of at least 100 mm HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 12 2.4.1 Terminal Markings - Mains Voltage The Merley control is supplied with screw type Rast 5 connectors for all electrical connections. The following connectors are provided Slot Connector type Live AC 230 V basic unit 533511609 Protective earth Neutral conductor...
Page 13 Room unit power supply 12 V DHW sensor top 533901617 Ground Outside sensor 533901618 Ground Digital / DC 0...10 V input 533901619 Ground Flow temperature sensor HK1 533901620 Ground Multifunctional sensor input 1 533901619 Ground HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 14: Pre-Assembled Wall Mounted Panel
RVS63.243 with the 1m ribbon cable supplied. Please ensure that the location of the display in the panel door allows the door to hinge open. With the aperture cut into the door panel, carefully fit the ‘MERLEY’ label to the panel before fitting the display. Removal...
Page 15: Room Unit
In the case of wall mounting, there must be sufficient clearance above the unit, enabling it to be fitted and removed  When the unit is removed from its base, power is cut off so that the unit is out of operation. HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 16: Outside Sensor
Note! Exposure of the sensor to direct sunlight at any time during the day will severely affect the performance of the compen- sation and optimum start functions. Outside Sensor HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 17 2.9.1 Mounting Location • The controller must not be exposed to dripping water Terminal Name QAA75 611 BSB data BSB ground Power supply DC 12 V 2.9.2 Electrical Connections 2.9.3 Dimensions and Drilling 2359Z12 HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 18 Prior to connecting the module, the basic unit must be disconnected from power! 2.10.4 Radio Connection Establishment of the wireless connection is described in the following sections which cover the relevant radio- controlled units. 2.10.5 Dimensions and Drilling HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 19: Programmable Room Unit
In the case of wall mounting, there must be sufficient clearance above the unit, enabling it to be fitted and removed. 2.11.1 Mounting - with base 2.11.2 Mounting - without base 2.11.3 Power Supply The room unit is powered by 3 off - 1.5 V alkaline batteries type AA (LR06). HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 20 50 % of the telegrams sent have been received. Testmode If the test was not successful, some other mounting location is to be selected or the AVS14.390 radio repeater can be used. 2.11.5 Dimensions and Drilling 2359Z12 HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 21 The outside sensor is to be connected to the radio transmitter via a 2-core cable, the connections are interchangeable. The room unit is powered by two 1.5 V alkaline batteries type AAA (LR03). HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 22 After the test, press the button on the transmitter of the wireless outside sensor again briefly until the LED extinguishes. .4 Dimension and Drilling 2.12 79,8 49,7 Ø 14,1 24,5 49,5 HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 23: Radio Repeater
When radio communication works, the LED on the radio module flashes briefly at 10-second intervals. After the test, press the button on the radio repeater again briefly until the LED extinguishes. 2.13.4 Dimension and Drilling HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 24: Commissioning
For detailed diagnostics of the plant, check operating pages “diagnostics heat source“ and “diagnostics consumer”. 3.1 Basic Unit Checking the LED - LED off: No power supply LED on Ready LED flashes Local fault HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 25: Operation
4.1.2 Operator unit Selection of DHW heating mode Selection of space Displaying information Confirmation of setting Chimney sweep function STB test manual operation Quitting the setting Adjustment of room Comfort setpoint Service socket (BSB) HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 26 State of heating circuit 1 Room temperature maximum State of DHW Boiler temp / Mixed flow temp State of boiler Outside temperature Date and time of day Outside temp min Telephone customer service Outside temp max HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 27 Operator unit / service unit The operator unit supports the heating circuits activated in the basic unit. When using this setting, the operator unit does not acquire and deliver the room temperature. HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 28 When commissioning the system, the wireless peripheral devices (room unit) are assigned to the basic unit. Test mode The test mode is used for checking the wireless communication. The test should be made when the installation is fully completed. HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 29 The button must be kept depressed during the entire test. If released, the test will be aborted. The SLT test is shown on the display. The test may only be made by qualified staff since the boiler temperature will be raised above the maximum limits. HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 30: Display
• Heating mode with no time program • Protective functions active Automatic summer / winter changeover (ECO functions) and 24-hour heating limit inactive in the case of continuous operation with Comfort setpoint HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 31 For the Reduced setpoint • Press OK • Select operating page “Heating circuit“ and • adjust the “Reduced setpoint“ After each readjustment, wait at least 2 hours, allowing the room temperature adapt. HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 32: Programming
The display shows the hours AUTO flashing. Turn the setting knob until the hours of the time of day are correct. Time of day and date To confirm, press OK. Hours / minutes HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 33 - To incorporate the building's thermal dynamics, the outside temperature is attenuated Example: TAged °C SWHG +1 °C SWHG SWHG -1 °C SWHG Summer/winter heating limit TAged The attenuated outside temperature Temperature Days HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 34 TVmax TVmin °C Current flow temperature setpoint TVmax Flow temperature setpoint maximum Tvmin Flow temp setpoint minimum HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 35: User Levels
Time of day and date Text3 Operator section You are now given a choice of user AUTO levels. Turn the setting knob until the re- quired user level is reached. Enduser Text3 Commissioning Press OK. HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 36 Time program heating circuit 1 Start of summer time Hours 1...24 h Time program heating circuit 2 End of summer time Minutes 0...60 min Time program heating circuit P Holidays heating circuit 1 Diagnostics of consumers HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 37: Overview Of Settings
Missing ¦ Ready ¦ No reception ¦ Change battery Operator unit 1 Missing ¦ Ready ¦ No reception ¦ Change battery Service unit Missing ¦ Ready ¦ No reception ¦ Change battery Delete all devices No ¦ Yes HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 38 Room temperature limitation - - - / 0.5 Boost heating - - - / 0 °C Quick setback Down to reduced setpoint Off ¦ Down to reduced setpoint ¦ Down to frost protection setpoint HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 39 Auto source seq exclusion None None None ¦ First ¦ Last ¦ First and last 3544 Leading source Source 1 Source 1 Source 1 ¦ Source 2 ¦ … ¦ Source 16 HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 40 Minimum flow temperature setpoint ¦ Heat request 10V ¦ Room temperature 10V 5951 Operating action of contact H1 NC ¦ NO 5952 Minimum flow temperature setpoint H1 °C 5954 Temperature value 10V H1 °C HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 41 Off ¦ Automatically 6605 Bus power supply state Off ¦ On 6620 Action changeover functions System Segment ¦ System 6621 Summer changeover Locally Locally¦ Centrally 6623 Changeover of operating mode Centrally Locally ¦ Centrally HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 42 7044 Maintenance interval - - - months 7045 Time since maintenance months 7119 Locked Economy function Locked ¦ released 7120 Economy mode Off ¦ On 7130 Chimney sweep function Off ¦ On HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 43 Source sequence changeover current Diagnostics heat generation 8310 Boiler temperature 140.0 °C 8311 Boiler setpoint 140.0 °C 8312 Boiler switching point °C 8314 Return temperature 140.0 °C 8315 Boiler return temperature setpoint °C HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 44 Water pressure H1 10.0 9031 Relay output QX1 Off ¦ On 9032 Relay output QX2 Off ¦ On 9033 Relay output QX3 Off ¦ On 9034 Relay output QX4 Off ¦ On HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 45: Qaa55
Heating mode according to the time program • Temperature setpoints according to the heating program "Comfort setpoint" or "Reduced setpoint" • Protective functions active • Automatic summer / winter changeover (ECO functions) HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 46 Heating to Reduced setpoint • The presence button is only active in automatic operation • The current selection is active until the next switching action according to the heating program take place HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 47 (timeout). P1 = 2 Storage with confirmation: A setpoint readjustment with the knob is adopt- ed only after pressing the operating mode but- ton. HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 48: Time Of Day & Date
Temporary deactivation of the programming lock is maintained until programming is quit. • Constant deactivation of programming lock. First, make the temporary deactivation, then go to operating line “Programming lock“ (operating line 27) and deactivate the programming lock HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 49: List Of Wireless Devices
When preselecting groups of days like for instance Mo...Fr and Sa...Su that use the same switching times, setting of the switching programs is simplified. HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 50: Holidays
The holiday program can only be used in "Automatic" mode. 6.6 Heating circuits For heating circuits, there are various functions available which can be indi- vidually set for each heating circuit. HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 51 The ranges of adjustable setpoints result from the interdependencies, as this is shown in the following diagram. HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 52 - The ”Room influence“ setting must be selected between 1 and 99 - There should be no thermostatic radiator valves in the reference room (mounting location of room sensor) (if such valves are present, they must be set to their fully open position). HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 53: Dhw
The heat source is be locked via the H… terminals. All temperature requests from the heating circuits and DHW are ignored. Frost protection for the boiler is maintained. The chimney sweep function can be activated although the heat generation lock is switched on. HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 54 If several heat requests are received at the same time (LPB, contact H.. contact, DHW, or from the controller itself), the highest of them will automatically be selected. °C Minimum flow TVHw temperature setpoint Flow temperature setpoint TVHw °C HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 55: Primary Controller System Pump
DHW primary controller For this application, the respective settings of operating page “DHW storage tank” can be adapted. Return controller cascade For this application, the respective settings of operating page “Cascade” can be adapted. HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 56 - There should be no thermostatic radiator valves in the reference room (mounting location of the room sensor). (if such valves are present, they must be set to their fully open position). HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 57 Boost heating is possible with or without room sensor. °C DTRSA Room temperature setpoint Actual value of the room temperature DTRSA Increase of the room temperature setpoint HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 58 Optimum stop control max The change from one temperature level to the other is optimized in a way that the Comfort setpoint minus 1/4 °C is reached at the relevant switching time HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 59 TRwA1 Reduced setp increase start TRwA2 Reduced setp increase end Comfort cooling setpoint Reduced room temperature setpoint TAgem Composite outside temperature Line no. Operating line Over-temperature protection pump circuit Over-temperature protection pump circuit HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 60 The floor curing function ensures controlled drying of the floor. It controls the flow temperature according to a temperature profile. Drying of the floor is ensured via the floor heating system and the mixing or pump heating circuit. HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 61 Operating mode changeover None ¦ Protection ¦ Reduced ¦ Comfort ¦ Automatic In the case of external changeover via inputs H1 / H2 / H3, the operating mode to be used can be selected. HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 62 The pump heating circuits stay locked until the DHW storage tank is heated up. If the capacity of the heat source is not sufficient, the mixing heating circuits will also be restricted. HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 63 If a sensor is installed in the DHW distribution pipe, the controller will monitor its actual value during the time the legionella function is performed. The adjusted setpoint must be maintained at the sensor during the adjusted “Dwelling time“. HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 64: Cascade
On completion of the number of hours set, the boiler sequence in the cascade changes. It is always the boiler with the next higher device address which assumes the role of the lead boiler. HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 65 The boiler selected as the lead boiler is always the first to be switched on, or the last to be switched off. The other boilers are switched on and off in the order of their device addresses. HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 66: Dhw Storage Tank
Always DHW is heated with the electric immersion heater throughout the year. This means that when using this application, the boiler is never required for DHW heating. HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 67 It is to be set whether the DHW storage tank receives its heat via the primary controller system pump or with the help of the system pump (depending on the type of plant). HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 68: Configuration
The collector calculates the switching points including the switching differential from the DHW setpoint and the acquired DHW storage tank temperature. Control thermostat The DHW temperature is controlled based on the switching state of a thermostat connected to B3. HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 69 H2 pump Q18 System pump Q14 Heat generator shut off valve Y4 Time program 5 K13 H3 pump Q19 Cascade pump Q25 DHW mixing pump Q35 DHW intermediate circulating pump Q33 Heat request K27 HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 70 (e.g. during night setback). In that case, multifunctional relay QX is used to activate the 2nd pump speed in the following manner: 1st speed 2nd speed Pump state output Q2/Q6/Q20 Output Q21/Q22/Q23 Part load Full load HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 71 The pumps are activated depending on the current outside temperature, even if there is no heat request. Outside temperature Pump Diagram ...-4 °C Continuously on -5…1.5 °C On for 10 minutes at 6-hour intervals Cycle (takt) 1.5 °C... Continuously OFF takt TA °C HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 72 If, after storage, a sensor fails, the basic unit generates an error message. This setting is used to ensure immediate saving of the sensors. This becomes a requirement when, for instance, a sensor is removed because it is no longer needed. HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 73: Lpb
Off: The bus power supply via controller is currently inactive. On: The bus power supply via controller is currently active. At the moment, the controller supplies some of the power required by the bus. HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 74 Manual source lock The range of action of summer changeover is as follows: Local entry: Local action; the local source is locked. Entry segment: Central action; all sources of the cascade are locked. HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 75 LPB the signal to the source controllers without sensor. The first numeral to appear on the display is the segment no. followed by the device HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 76: Faults
The basic unit stores the last 10 faults in non-volatile memory. Any additional entry deletes the oldest in the memory. For each error entry, error code and time of occurrence is saved. HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 77: Maintenance / Special Modes
Delays display of the maintenance message and activation of the flue gas relay (K17). Economy function Locked Economy mode is not possible. Released Economy mode can be activated. Economy mode Switches economy mode on or off HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 78 Heating circuit mixing valve opening / closing Y1 / Y2 Y5 / Y6 Heating circuit pump 2nd speed Primary controller System pump Mixing valve opening / closing Y19/Y20 Hx group Pump H1 Auxiliary functions Alarm output Heat demand HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 79: Input / Output Tests
During the relay test, limitation of the boiler temperature by the electronic control thermostat (TR) remains activated. Other limits are deactivated. Selector sensor values are updated within a maximum of 5 seconds. The display is made with no measured value correction. HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 80: State
Heating mode Reduced Frost protection room active Frost protection flow active Frost protection plant active Frost protection active Summer operation Summer operation 24-hour Eco active Setback Reduced Setback frost protection Room temperature limit HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 81 Frost protection active Frost protection active Overrun active Overrun active Stand-by charging Stand-by charging Charged, max storage temperature Charged, max charging temperature Forced, legionella temperature Charged, nominal temperature Forced, Reduced temperature Charged Ready Ready HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 82 In operation for heating circuit In partial load operation for HC In partial load operation for HC Released for HC Released for HC Overrun active Overrun active Released Released Frost protection plant active Frost protection active HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 83: Diagnostics Heat Generation
Common return temperature sensor error DHW temperature 1 sensor error DHW temperature 2 sensor error DHW primary controller sensor error DHW circulation temperature sensor error Room temperature 1 sensor error Short-circuit LPB LPB address collision HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 84 Sensor BX5 no function Sensor BX21 no function Sensor BX22 no function Sensor BX1 no function Sensor BX12 no function Primary controller / system pump address error Pressureless header address error Cascade sensor B10 missing HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 85 Water pressure 3 heating circuit too low (dropped below lower pressure limit 3) 6.19.3 Special operation code Special operation Description code Manual operation SLT test Chimney sweep function Simulation outside temperature Alternative energy operation Economy mode HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 86: Plant Diagrams
DHW charging sensor DHW temperature outlet sensor Flow sensor primary controller DHW circulation sensor B39 Return sensor Cascade return sensor Primary circuit return sensor Outside sensor. Common flow sensor Room unit 1 Flow switch HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 87 7.1.1 Basic diagram RVS63.243 Standard diagram - cascade pump Boiler Boiler Boiler Y1/Y2 B9 T Combined DHW + heating with pump & valve - cascade pump Boiler Boiler Boiler B9 T HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 88 The type and number of extra functions that can be applied depend on the multifunctional outputs and inputs QX… or BX… Depending on the type of application, the use of extra functions necessitates a number of appropriate operating line settings. HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 89: Low Loss Header
7.2.1 DHW storage tank (DHW) Electric immersion heater DHW electric immersion heater DHW circulating pump 7.2.2 Low Loss Header Common flow sensor HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 90: Technical Data
Sensor inputs B1, B2, B3, B12, BX1, NTC10k (QAZ36, QAD36) BX2, BX3, BX4 PT1000 (optionally for collector and flue Sensor inputs BX1…BX4 gas sensor) Perm. sensor cables (copper) with cross-sectional area: 0.25 0.75 Max. length: HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 91 Storage to IEC721-3-1 class 1K3 temp. -20…65 °C Climatic conditions Transport to IEC721-3-2 class 2K3 temp. -25…70°C Operation to IEC721-3-3 class 3K5 temp. 0...50 °C (non-condensing) Weight Without packaging RVS63.243: 614 g HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 92: Power Supply
Transport to IEC721-3-2 class 2K3 temperature –20...70 °C Operation to IEC721-3-3 class 3K5 temperature 0...50 °C (non-condensing) Without packaging AVS37.294: 160 g Weight QAA75.61x: 170 g QAA78.610: 312 g QAA55.110: 115 g HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 93: Radio Module
- EN 61000-6-1, EN 61000-6-2 - Emissions - EN 61000-6-3, EN 61000-6-4 Low-voltage directive 73/23/EEC – Electrical safety - EN 60730, EN 50090-2-2 Radio EN 300 220-1 , -3 (25-1000MHz) EN 301 489-1 , -3 HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 94: Wireless Outside Sensor
CE conformity to EMC directive 89/336/EEC - Immunity - EN 61000-6-2 - Emissions - EN 61000-6-3 Low-voltage directive 73/23/EEC – Electrical safety - EN 60730-1, EN 50090-2-2 Radio EN 300 220-1 (25-1000MHz) HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 95 EN 60 529 Safety class to EN 60 730 low-voltage-carrying parts meet the require- ments of safety class III, if correctly in- stalled Degree of pollution to EN 60 730 Normal pollution HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 96 Storage to IEC721-3-1 class 1K3 temp. -20…65 °C Transport to IEC721-3-2 class 2K3 temp. -25…70°C Operation to IEC721-3-3 class 3K5 temp. 0...50 °C (non-condensing) Weight Without packaging Radio repeater 112 g Power supply 195 g HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 97: Sensor Characteristics
-9.0 4,358 21.0 1,170 -8.0 4,152 22.0 1,125 -7.0 3,958 23.0 1,081 -6.0 3,774 24.0 1,040 -5.0 3,600 25.0 1,000 -4.0 3,435 26.0 -3.0 3,279 27.0 -2.0 3,131 28.0 -1.0 2,990 29.0 HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 98 980.4 1289.9 1591.9 1000.0 1309.0 1610.5 1019.5 1328.0 1629.1 1039.0 1347.1 1647.7 1058.5 1366.1 1666.3 1077.9 1385.1 1684.8 1097.3 1404.0 1703.3 1116.7 1422.9 1721.7 1136.1 1441.8 1740.2 1155.4 1460.7 1758.6 1174.7 1479.5 HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 99 APPENDIX A - System Schematics Figure A1 - Cascade with primary circuit pump HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 100 M Bx1 MB DB G+ CL- CL+ M B1 Q2 E Y2 E N Y1 Qx1 E B3 Q3 Merley Sequence Controller Remote Radio Enable module Supply 230V 50Hz 0 - 10V signal HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 101: Appendix B: Wiring Schematics
/contactor required 230V ground LPB bus communication to boilers signal Radio module (for use with wireless programmable room sensor or external air sensor) Supply 230V 1 phase 50Hz Fused 10 Amps HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 102 Figure B2 - Wireless configuration Power Supply 230V Programmable Radio Repeater Room Sensor Module 30m Max. External Air Sensor Radio Module Sequence Controller Boiler Boiler Boiler HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 103: Appendix C: Programming Parameters
Refer to Section 5.2 page 35, for itemisation of parameters covering the Merley functionality. The folloing parameters will require setting to the appropriate or suggested values to enable the Merley control to function. Any parameter not referred to should be left at the default setting.
Page 104 732 24-hour heating limit this can turn off heating within normal operating hours and can also extend it outside of normal operating hours which can result if problems especially if the Merley is not controlling the pump run times. In general turn this function off.(set to ---) 740/741 flow temp min/max these two parameters set the range within which the slope will operate.
Page 105 90°C and will override any request for higher operating temperatures. Refer to the boiler Instruction Manual for boiler parameter setting procedure. Additionally each boiler LMU controller must also be configured for cascade by setting parameter 552 to 80. HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 106: Appendix D: Wiring For Primary Pump When Using Cascade Controller
APPENDIX D - Wiring for Primary Pump when using Cascade Controller HAMWORTHY HEATING LTD Merley Boiler Sequence Controller 500001210/D...
Page 108 Wessex House, New Fields Business Park, Stinsford Road, Poole, Dorset, BH17 0NF Telephone: 01202 662500 Fax: 01202 662522 Email: service@hamworthy-heating.com Website: www.hamworthy-heating.com Hamworthy reserves the right to make changes and improvements which may necessitate alteration to the specification without prior notice.

Hamworthy Merley Installation, Commissioning And Operating Instructions

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