Certikin MB20S Operating, Installation And Servicing Instructions Download Page 36

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6.0 Servicing

Genie S

6.3 SPARES

Item

Mfg’ Part Number

Supplier Part No

Primary heat exchanger (Genie 20 & Genie 35)

M2136

SPMBG001

Primary heat exchanger (Genie 50)

M2139

SPMBG002

Primary heat exchanger silicone door seal

M2995

SPMBG082

Primary pump

M7966

SPMBG095

Primary ﬂ ow temperature sensor

M2149

SPMBG013

Primary ﬂ ow temperature stat

M2667

SPMBG055

Primary ﬂ ow limit stat

M0868

SPMBC009

Primary pressure switch

651284

SPCOH2/014

Primary pressure gauge

M4240

SPCOH2/003

Primary expansion vessel

M3369

SPCOH103

Secondary heat exchanger (All models)

M2745

SPMBG053

Pool water pressure switch

651284

SPCOH2/014

Pool temperature sensor

M2798

SPCOH2/002

Pool thermostat PCB

M2746

SPMBG057

Ignition control (Genie 20)

M7182

SPMBGM7182

Ignition control (Genie 35 & Genie 50)

M2141

SPMBG005

Spark & Sense Electrode

M2146

SPMBG010

HT Lead

M2142

SPMBG006

Gas valve

M2140

SPMBG004

Propane oriﬁ ce (Genie 20 & Genie 35)

M2150

SPMBG014

Propane oriﬁ ce (Genie 50)

M2151

SPMBG015

Fan

M2138

SPMBG003

Pump relay

M2688

SPMBG054

Condensate syphon

M2143

SPMBG007

Condensate pressure switch

M2144

SPMBG008

Flue temperature limit stat

M2875

SPMBG060

Fig. 13.0

Pool Thermostat
Retainer

Transformer

Condensate
Pressure Switch

6.4 HEATER COMPONENTS ILLUSTRATIONS

Relay

Summary of Contents for MB20S

Page 1: ...ervicing Instructions for Indirect fired condensing pool spa heaters M2709 Rev J Models MB20S MB35S MB50S Genie IMPORTANT FOR YOUR SAFETY READ THIS MANUAL BEFORE OPERATING THE HEATER RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCE ...

Page 2: ...Condensing pool heater 2 Genie S Blank page ...

Page 3: ...minal 12 3 5 Heater terminal dimensions 13 3 6 Flue examples and ﬂue kit part codes 15 3 7 Terminal guard and roof terminal 17 3 8 Pool water plumbing 17 3 9 Condensate connections 17 3 10 Electrical connections 19 3 11 Gas connection 19 3 12 Wall mounting kit 20 3 13 Multiple heater kit 22 4 0 COMMISSIONING 24 4 1 Removal of primary air 24 4 2 Prior to burner operation 25 4 3 Pool water pressure ...

Page 4: ... 1 43 1 9 MAXIMUM RATE CO ppm 20 60 120 150 80 120 35 70 130 160 100 130 COMBUSTION SETTINGS NG CO2 8 7 9 0 9 2 9 4 9 0 9 4 9 9 10 1 10 3 10 5 10 0 10 3 OFFSET SETTING pA 3 0 3 0 3 0 3 0 3 0 3 0 ORIFICE mm Not required 4 4 4 4 5 2 GENERAL SPECIFICATIONS WATER CONTENT MB20S MB35S MB50S 5 0 Litres 6 0 Litres WEIGHT net MB20S MB35S MB50S 53 kg 55kg DIMENSIONS OVERALL 375 mm wide 520 mm deep 980 mm hi...

Page 5: ...ervice engineer to inspect the heater and its gas controls There are NO user serviceable parts inside this ap pliance DO NOT interfere with any sealed compo nents BEFORE OPERATING after a prolonged time oﬀ Check all around the appliance area for the smell of gas WHAT TO DO IF YOU SMELL GAS Do not try to light any appliance Do not touch any electric switch Do not use any phone in your building Imme...

Page 6: ... shutdown When the blockage is cleared the heater will operate again Pool water pressure switch A water pressure switch is provided in the heater to shut oﬀ the burner in the event that pool water flow is interrupted The water flow pressure switch should be checked and adjusted for proper operation by a qualified service person at the time of installation and thereafter checked at each service Int...

Page 7: ...ed by warranty These instructions cover a range of indirect ﬂoor mounted gas ﬁred condensing pool heaters which are room sealed and fan assisted The ﬂue system available is concentric left right rear and vertical all up to 20 metres FEL There is also an outdoor top terminal for use where the heater is installed out of doors The ignition system is fully automatic There are three models with diﬀeren...

Page 8: ...OT be taken in any way as overriding statutory obligations 2 7 LOCATION OF HEATER This heater MUST be installed on a ﬂat and level ﬂoor capable of adequately supporting the weight of the heater and any ancillary equipment Provision is provided for the heater to be ﬁxed to the ﬂoor It is IP 44 Rated and can be installed out of doors in a suitable position In all cases the choice of position should ...

Page 9: ...ARNING It is absolutely ESSENTIAL to ensure in practice that the products of combustion discharging from the terminal cannot re enter the building or any other adjacent building through ventilators windows doors other sources of natural air inﬁltration or forced ventilation air conditioning If this should occur the appliance MUST be turned OFF IMMEDIATELY and a Gas Safe engineer consulted 2 11 AIR...

Page 10: ...ary line facing a terminal 600 K From a terminal facing a terminal 1200 L From a opening in a carport e g door windows into the building 1200 M Vertically from a terminal on the same wall 1500 N Horizontally from a terminal on the same wall 300 P From a roof structure N A Q Above the highest point of intersection on a roof 1200 Terminal adjacent to windows or opening on pitched and ﬂat roofs The ﬂ...

Page 11: ...r pipework and internal drainage systems All pipework and ﬁttings in the condensate drainage system MUST be made of plastic unless they carry other liquid waste No other materials may be used The pipework should be insulated if run out of doors The drain outlet on the boiler is 40 mm Hunter waste pipe 2 15 POOL PUMP PIPE WORK This heater is an indirect design and uses two very high performance hea...

Page 12: ...utdoor top terminal is a push ﬁt into the ﬂue adapter and locked in position with a clamping ring See 3 2 for details If lubrication is required only Centra Cerin or silicone grease should be used 3 3 OTHER FLUE SYSTEMS inc FEL The maximum Flue Equivalent Length FEL permit ted is 20 metres horizontal or vertical The compo nent parts have the following FELs 1 metre of concentric ﬂue 1 0 2 metres of...

Page 13: ...rol CCP01 F Gas Supply 22mm Copper G Safety Valve Outlet 15mm Copper H Condensate Drain 1 or 40mm Hunter Plastic I From Pool 1 Plastic Demountable Fittings Fig 3 2 Service Access Left Right or Above 300mm In Front 800mm Rear Flue Left Right Flue Horizontal Wall Terminal Dimensions Horizontal Wall Terminal MBHT F G H I 940 980 374 78 90 773 134 253 LH 341 342 94 A B 307 C 533 265 RH SW WT WT 136 18...

Page 14: ...l MBOT Fig 3 4 Clamp Assembly Screw Pitched Roof Instal lation Vertical Roof Terminal Dimensions Flat Roof Installation Use Seldeck Flashing System for all Roof Installations Vertical Roof Terminal MBVT 1 metre Horizontal Vertical Extension Pipe MBHVE 45 degree bends MB45DB 550 500 500 ...

Page 15: ...a Yes MBOT Outdoor Terminal Yes n a n a MB45DB 45 degree bend n a Option Option MB90DB 90 degree bend n a Option n a Outdoor Terminal Extended Horizontal Wall Terminal Extended Vertical Roof Terminal Horizontal Wall Terminal MBOT MB90DB MBHVE MBHT not shown TO OFFSET USE MB45DB MB90DB MBHT not shown n n n n n n n n n MBVT MBHVE TO OFFSET USE MB45DB SET Fig 4 3 Fig 4 0 Fig 4 1 Fig 4 2 E E E E E E E...

Page 16: ...Roof Terminal 3 3m MBOT Outdoor Terminal n a MB45DB 45 degree bends pair 1 1m MB90DB 90 degree bend 1 5m Flue Equivalent Length m The Maximum Flue Equivalent Length FEL permitted is 20 metres horizontal or vertical The ﬂue kits available below list the FEL for each component Add up all the FEL s used in your design and check that this does not exceed 20 metres see 3 3 for details per bend ...

Page 17: ...t emerges at the drain This will also ﬁll the trap ready for operation 3 7 TERMINAL GUARD ROOF TERMINAL The ﬂue outlet from this heater is low temperature normally below 60O C so a guard is only required if the terminal is in a position where it may be dam aged or blocked A suitable guard is available from TFC Ltd 01732 351555 Model DK6 The vertical roof terminal should be ﬁtted in a mini mum of 3...

Page 18: ... or right Drain Cap behind vessel can be removed for Winterisation D CONDENSATE SYPHON 75 MM Fig 7 1 Removable Plate Use to close oﬀ unused Waste exit on panels R 1 20 Fall 2 5 Degrees Strap On Boss 200mm Land Drain Filled with Lime chippings 400mm deep Insulate against freezing Note Do not reduce the pipe size below the 40mm provided Fig 7 0 Soakaway Stack Attachment Soil Pipe or Drain ...

Page 19: ...rated in 5 4 Connections are as follows 4 Way Terminal Supply Connection Earth N Mains Neutral SL Switched Live L Permanent Live A factory installed link has been ﬁtted between SL and L which should be removed if the heater is to have its own switched supply For systems using an external programmer the electrical wiring should follow the relevant control manufacturer s recommendations with the swi...

Page 20: ...om wall mounting bracket to the rear of the heater by using the existing 3 gold screws that ﬁx the base to rear panel Fig 10 5 Hang the heater on top wall mounting bracket locating it on the two 5mm studs With the heater now in position drill and screw the bottom wall mounting bracket to the wall See Fig 10 4 Fig 10 4 Fig 10 3 476 376 940 170 46 HEATER OUTLINE TOP WALL MOUNTING BRACKET HORIZONTAL ...

Page 21: ...nie S Fig 10 5 BOTTOM WALL MOUNTING BRAKET REMOVE DEMOUNTABLE POOL FITTINGS FOR BETTER DRILL ACCESS TOP WALL MOUNTING BRACKET LOCATING STUDS 2 PLC S GOLD SCREWS SUPPLIED 3 PLC S M4 SCREWS SUPPLIED 3 PLC S TOP HANDLE BRACKET ...

Page 22: ...e pool thermostat PCB by removing the retaining plate and carefully slide out until fully accessible Fig 10 0 Carefully ﬁt the adapter kit PCB in the space behind the pool temp display on the PCB Fig 10 0 ensuring that the six pins on the PCB pass through the underside of the adapter PCB and that the plastic locking pillars snap into place Reﬁt pool thermostat PCB and knob Repeat the above steps f...

Page 23: ...heir respective pressure switches the burner will stop im mediately and the slave will be removed from the group This is indicated by the yellow ﬁlter LED on the front control panel The master will check approximately every 3 minutes and if the issue has been resolved the slave will be added back to the group The Master display can be altered in setup mode like a single heater see 5 2 for details ...

Page 24: ...he pool pump operating see following page THIS HEATER AS SUPPLIED IS NOT FILLED WITH SUFFICIENT WATER IN THE PRIMARY CIRCUIT DO NOT UNDER ANY CIRCUM STANCES OPERATE THIS HEATER UNTIL THE PRIMARY CIRCUIT HAS BEEN FILLED PRESSURISED WITH WATER ALL AIR HAS BEEN VENTED IT IS ESSENTIAL TO FOLLOW THE GUID ANCE BELOW AS PERMANENT DAMAGE COULD OCCUR TO THE PRIMARY HEAT EXCHANGER AND THIS DAMAGE WILL NOT B...

Page 25: ...maximum to check that the burner is turned ON when the pool pump is turned ON and OFF when the pool pump is turned OFF It is very important to verify that it turns oﬀ when the water ﬂow is inter rupted 4 4 CONVERSION TO LPG The heater can be converted on site Natural Gas to Propane or Propane to Butane Follow these steps to convert to LPG Fig 5 0 1 With the gas and electrical supply oﬀ undo the th...

Page 26: ...ocked or frozen condensate pipework the boiler will automatically stop functioning It will start again as soon as the blockage has cleared Finally instruct the user on heaters operation and controls 4 5 COMMISSIONING THE BURNER The gas mixture and burner oﬀ set gas rate minimum load rate is preset by the manufacturer DO NOT attempt to change the settings of the oﬀ set gov ernor behind the sealed c...

Page 27: ... Lock Reset button Turn the pool temperature control knob until the display shows F Press the Lock Reset button once and the display will show C Switch the Panel Switch OFF then back ON again The control will now display in centigrade Lock Reset Button On Oﬀ switch Temperature display Pool temperature control knob O Oﬀ ﬀ O Oﬀ ﬀ t t es eset et t t er erat atur ur l l t t l l t tem emp p Fig 9 0 Pre...

Page 28: ...on The controls are now in user setup mode See 4 6 for information Service mode This is a special mode used to set the operation of the control and to investigate fault conditions it is entered from user setup mode Rotate pool thermostat knob fully clockwise to show the software version number Press the Lock Reset button for 3 seconds The control is now in Service Mode It is now possible to change...

Page 29: ...lue gas over temperature Allow to cool then investigate in Engineering Mode Reset with Button GAS Gas Control Lockout Unable to light burner reset with Button OR Flue Stat tripped Investigate cause Reset on Flue Stat FRONT PANEL ON PCB EXPLANATION OFF no mains supply or failed power supply Flashing HI Condensate level high Blocked Clear obstruction and allow control to auto reset SEr alternating w...

Page 30: ...Heat Exchanger Flow sensor open circuit H alternating with oc Heat Exchanger Combustion sensor open circuit H alternating with cc Heat Exchanger Combustion sensor short circuit F alternating with cc Heat Exchanger Flow sensor short circuit Err alternating with 4 Pool potentiometer open circuit Err alternating with 5 Pool potentiometer short circuit For all of the above Turn oﬀ correct problem and ...

Page 31: ... Replace ESYS Yes Replace Gas valve No No Replace Ignition lead and electrode Have the ﬂue gas or ﬂow tem perature limit switches triggered With power isolated reset overheat de vices Yes No Fault cleared Are connections and wiring be tween ESYS limit devices OK R e p l a c e connector or wiring No Yes Investigate causes of overheating No Yes Replace ESYS NB A Gas lockout which occurs when there i...

Page 32: ...5 0 Fault ﬁnding 32 Genie S Fig 11 0 5 4 SCHEMATIC WIRING ...

Page 33: ...g fan electrical connectors Remove air tube from ﬂue adapter Undo cover over Ignition control connections and remove the two connectors Pull oﬀ the earth lead connection on the valve heat exchanger Undo the four nuts holding the heat exchanger front and withdraw Carefully inspect the black silicone seal on the inside of the burner door for hardness or splitting Replacement is recommended every two...

Page 34: ...xchanger pool sensor Located in a pocket in the From Pool side of the secondary heat exchanger See 6 4 for illustration Pull out the retaining wedge and pull out the sensor Disconnect from the six way terminal strip on the electrical chassis Replacement is the reverse Pool water pressure switch Located on the Inlet connection to the secondary heat ex changer and its removal will require the draini...

Page 35: ...ir inside may damage the heat exchanger and invalidate the warranty Expansion vessel See 6 4 for illustration Remove the single screw holding the retaining strap Release the ﬂexible hose connection to the vessel and remove it Replacement is the reverse Heat exchanger See 6 4 for illustration Remove the expansion vessel Remove the spacer below the secondary heat Exchanger by removing the two screws...

Page 36: ...condary heat exchanger All models M2745 SPMBG053 Pool water pressure switch 651284 SPCOH2 014 Pool temperature sensor M2798 SPCOH2 002 Pool thermostat PCB M2746 SPMBG057 Ignition control Genie 20 M7182 SPMBGM7182 Ignition control Genie 35 Genie 50 M2141 SPMBG005 Spark Sense Electrode M2146 SPMBG010 HT Lead M2142 SPMBG006 Gas valve M2140 SPMBG004 Propane oriﬁce Genie 20 Genie 35 M2150 SPMBG014 Prop...

Page 37: ...emountable Pool Connections Fig 14 5 Condensate Pressure Switch Flue Adapter Gas Valve Tu G HT Lead HT Spark Sense Electrode Condensate Syphon Co Co Sy Combustion Sample Point e Air Tube Air Throttle Hea o Co m He Flo Hi Limit Ther mostat Condensate Pipe Safety Valve Outlet t te P e Pipe ipe p Expansion Vessel Ex E Ve V Secondary Heat Exchanger Drain Fill point with NR Isolation valve Safety Valve...

Page 38: ...aned Pressure CO CO2 Service History Commissioning Installer No Date Working pressure mbar CO ppm CO2 Instructed User in operation Yes No Circle appropriate Date Cleaned Pressure CO CO2 Date Cleaned Pressure CO CO2 Condensing Pool Heater 04 12 13 Model Gas Genie 20 Genie 35 Genie 50 NG LPG ...

Page 39: ...Condensing pool heater 39 Genie S Blank page ...

Page 40: ...Station Lane Industrial Estate Witney Oxon Tel 01993 778855 Fax 01993 703407 June 2020 Rev J ...

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