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Health and Safety document No 635, “Electricity at
Work Regulations”.
Detailed recommendations are contained in the
following British Standard Codes of Practice.

Codes of Practice.

BS.6798 Installation of gas fired hot water boilers of
rated input not exceeding 70kW.
BS.5440: Part1 and Part 2. Flues (for gas appli-
ances of rated input not exceeding 60kW).
BS 6891 Specification for installation of low pressure
gas pipework.
BS5482:1 Code of practice for domestic butane &
propane gas burning installations.
Building Regulations Part L1.

IMPORTANT

.

 

It is important that no external

control devices are directly connected to this appli-
ance - unless covered by these ‘Installation and
Servicing Instructions’ or otherwise recommended
by the manufacturer. If in doubt, please enquire.
Any direct connection of a control device not
recommended by the manufacturer could infringe
the Gas Safety (Installation & Use) Regulations, the
above regulations and the normal appliance war-
ranty.

Manufacturer’s notes must NOT be taken, in any
way, as overriding statutory obligations.

Location of Heater

The 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 take into account the flue, the plume and the
condensate drainage.

IMPORTANT NOTICE.

If the Heater is to be fitted in a timber framed build-
ing it should be fitted in accordance with the British
Gas publication ‘Guide for Gas Installations in
Timber Frame Housing’, reference DM2. If in doubt,
advice must be sought from the Local Gas Region of
British Gas.

The Heater may be installed in any room or internal
space. Particular attention is drawn to the require-
ments of the current I.E.E Wiring regulations and, in
Scotland, the electrical provisions of the Building
Regulations applicable to Scotland with respect to
the installation of the boiler in a room or internal
space containing a bath or shower.

Where a room sealed appliance is installed in a
room containing a bath or shower then the appliance
and any electrical switch or appliance control,
utilising mains electricity should be so situated that it

Condensing Pool Heater

     

3

           22/12/08

  INTRODUCTION

These Instructions cover a range of direct, 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 two models with different outputs - see
the 

Technical Data on Inside Cover 

for details.

Both can be installed in multiples to obtain a larger,
combined output.

The casing is of green and black polyester powder
coated mild steel. The Heaters use a high perform-
ance stainless steel heat exchanger and are suit-
able for connection to pools using chlorinated and
salt chorinated water provided the following levels of
chemicals are maintained.

pH

7.2 to 7.8

Total Alkalinity

80 to 140 ppm

Calcium Hardness

200 to 400 ppm

Salt maximum

30000 ppm

Free Chlorine

1 to 4 ppm

All chemicals must be introduced and completely
diluted into the pool water before being circulated
through the heater. Do not place chlorine tablets or
bromine sticks in the skimmer, high chemical
concentrations will result when the pump is not
running.

Chlorinators must feed downstream of the heater
and have an anti-siphoning device to prevent
chemical back-up into the heater when the pump is
shut off.

NOTE: 

High chemical concentrates from feeders

and chlorinators that are out of adjustment will
cause  corrosion to the heat exchanger in the
heaters. Such damage is not covered under the
warranty.

Gas Safety (Installation and Use)
Regulations, (as amended).

It is the law that all gas appliances are installed by a
competent person (e.g. a CORGI registered opera-
tive) in accordance with the above Regulations.
Failure to install appliances correctly could lead to
prosecution.

It is in your own interest, and that of safety, to
ensure that the law is complied with. The installation
of the Heater MUST also be in accordance with the
current I.E.E.. Wiring Regulations, the Local Build-
ing Regulations, Building Standards (Scotland), the
Bye Laws of the Local Water Undertaking, any
relevant requirements of the Local Authority, and

Summary of Contents for MB35S

Page 1: ...cal switch do not use any phone in your building Immediately call your gas supplier from a neighbour s phone Follow the gas supplier s instructions Installation and service must be performed by a Corgi registered installer A page is included on the inside back page of this booklet for recording commissioning and service details Operating Installation and Servicing Instructions for Condensing Pool ...

Page 2: ...70 121 870 165 170 GAS RATE NG Propane m3 h 3 45 4 64 1 43 1 9 MAXIMUM RATE CO 120 150 80 120 130 160 100 130 COMBUSTION SETTINGS NG CO2 9 2 9 4 9 0 9 4 10 3 10 5 10 0 10 3 OFFSET SETTING pA 3 0 3 0 3 0 3 0 ORIFICE mm Not required 4 4 5 2 GENERAL SPECIFICATIONS WATER CONTENT MB35S 3 0 Litres 0 66 gallons MB50S 4 0 Litres 0 88 gallons MINIMUM FLOW RATE 80 l m 17 8 gpm MAX PRIMARY WATER PRESSURE 3 b...

Page 3: ...raulic Resistance Graph 5 Fig 3 0 Outdoor Terminal Fixing 6 Fig 3 1 Service Access Pipe Connections 7 Fig 3 2 Wall Terminal Dimensions 7 Fig 3 3 Outdoor Terminal Dimensions 8 Fig 3 4 Roof Terminal Dimensions 8 Fig 4 0 Wall Terminal Installation 9 Fig 4 1 Extended Wall Terminal Installation 9 Fig 4 2 Extended Vertical Roof Installation 9 Fig 4 3 Outdoor Terminal Installation 9 Fig 5 0 Pressure Swit...

Page 4: ...E INSTRUCTIONS EXACTLY A FIRE OR EXPLOSION MAY RESULT CAUSING PROPERTY DAMAGE PERSONAL INJURY OR LOSS OF LIFE This appliance is equipped with an ignition device which automatically lights the burner BEFORE OPERATING after a prolonged time off smell all around the appliance area for gas Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor WHAT TO DO I...

Page 5: ...er could be noticeably warmer than the pool This is not a fault but part of the design It will reduce for the final degree up to set temperature CAUTION Elevated water temperature can be hazardous and the U S Consumer Product Safety Commission recommends the following guidelines 1 Spa or hot tub water temperatures should never exceed 40 C 104 F A temperature of 38 C 100 F is considered safe for a ...

Page 6: ...containing a bath or shower then the appliance and any electrical switch or appliance control utilising mains electricity should be so situated that it Condensing Pool Heater 3 22 12 08 INTRODUCTION These Instructions cover a range of direct 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 al...

Page 7: ... setup for the primary gas It can be converted to the alternative by the addition of an Orifice which is supplied with the heater See page the inside cover for the data and Page12 for conversion instructions Flueing Only flue components specified by the Manufacturer should be used with these appliances Detailed recommendations for flueing are given in BS 5440 The following notes are intended for g...

Page 8: ...ng mains electricity should be so situated that it cannot be touched Condensing Pool Heater 5 22 12 08 Condensate Drain See Fig 7 0 and 7 1 A 75mm condensate trap is provided on the Heater and is satisfactory when connected to Soakaways Gullies Rainwater Pipework and Internal Drainage systems All pipework and fittings in the condensate drainage system MUST be made of plastic unless they carry othe...

Page 9: ...hassis on the pressure gauge side To operate the Mains must be connected and on 8 Test for leaks 9 Replace the Electrical Cover and Panels Assembly of the Outdoor Terminal A specific Outdoor Top Terminal must be used for an outdoor installation There must be at least 600mm clearance around the terminal and complete clear ance above The Outdoor Top Terminal is a push fit into the Flue Adapter and l...

Page 10: ...trol CCP01 F Gas Supply 22mm Copper G Safety Valve Outlet 15mm Copper H Condensate Drain 1 or 40mm Hunter Plastic I From Pool 1 50 mm 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 SW WT WT 136 188 9 3 9 3 1065 1065 52mm 1000mm 3 940 980 374 78 90 773 13...

Page 11: ...inal MBOT Fig 3 4 Clamp Assembly Screw Pitched Roof Installation 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 12: ...l Roof Terminal n a n 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 MBVT MBHVE TO OFFSET USE MB45DB Fig 4 3 Fig 4 0 Fig 4 1 Fig 4 2 Determine the...

Page 13: ...rtical 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 avail able 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 page 6 per bend ...

Page 14: ...bed as follows 1 The Pump outlet is plumbed to the inlet of the Filter 2 The outlet side of the Filter is then plumbed to the inlet of the Heater 3 TheoutletoftheHeaterisplumbedtothereturnline to the pool or spa The Pump Filter and Heater are plumbed in series If it is necessary to install a valve on the return to the Fig 5 0 pool then it is recommended that a flow switch is installed and interloc...

Page 15: ...ust the Rubber Seal between them A new Serial Number Data Label should be obtained from the manufacturer and affixed over the existing Gas Connection The 22mm copper gas connection provided can be positioned to exit the Heater from either the left or the right A minimum of 20mb NG 37mb propane 28 mbar butane must be available at the Heater inlet with the Heater and other connected appli ances firi...

Page 16: ...he simplest way to do this is to carefully pour some water into the boiler flue and check it emerges at the drain This will also fill the trap ready for operation The Guide to the Condensing Boiler Assesment Procedure for Dwellings can be refered to see http www planningportal gov uk england profes sionals en 1115314255842 html Electrical Connections WARNING The appliance MUST be earthed All wirin...

Page 17: ...can be removed for Winterisation Condensate Syphon 75 mm Condensing Pool Heater 14 22 12 08 Fig 7 1 Removable Plate Use to close off unused Waste exit on panels 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 18: ...on Fig 8 0 Fault Diagnosis LPG models require to be modified as described on page 12 It is recommended that the condensate trap is full of water before firing If the Heater fails to light the gas it will shutdown and try again It will repeat this a total of 5 times and then locks out This will show as the Red LED lit and GAS on the display Press the Lock Reset button to start another 5 attempts It...

Page 19: ...n Panel Switch OFF then back ON whilst pressing the 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 Fig 9 0 User Setup Mode Setting ...

Page 20: ...y removing retaining plate and carefully slide out until fully accessible Fig 10 0 Carefully fit the Adapter PCB in the space behind the Pool Temp Display on the Board Fig 10 0 ensuring that the six pins on the Board pass through the underside of the Adapter PCB and that the plastic locking pillars snap into place Refit Pool Thermostat Board and Knob Repeat steps 1 and 2 for all the Heaters Using ...

Page 21: ...e actual temperature and the Slaves three dashes If a Slave continues to show a moving display of dashes this indicates it not correctly connected to the Master check the Interconnection cable plugs are fully home Replace the panels Fig 10 2 If a Slave has Flow fault which its Pressure Switch detects the burner will stop immediately and the Filter LED will light It will no longer be available to t...

Page 22: ...the Wall Mounting Kit Kit Part Code MBWMK35 50 Instructions Select a suitable wall and position to mount the Heater Note the Heater weighs 40kg Screw the Top Wall Mounting Bracket level to the wall Fig 10 4 Attach the Top Handle Bracket to the rear of the Heater by using the 3 M4 screws supplied Fig 10 5 Attach the Bottom Wall Mounting Bracket to the rear of the Heater by using the existing 3 gold...

Page 23: ... 22 12 08 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 24: ...Fig 11 0 Condensing Pool Heater 21 22 12 08 Schematic Wiring ...

Page 25: ...Button The Control is now in User Setup Mode See Page 16 for details 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 chan...

Page 26: ...w 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 with pool temperature Serv ice...

Page 27: ...rcuit F alternating with oc 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 ...

Page 28: ...e Valve and Heat Exchanger Undo the four nuts holding the Heat Exchanger front and withdraw Assembly is the reverse Reset the Service Hours Counter See Service Mode page 22 Spark Sense Electrode Turn off the Heater Pull off the HT Lead Undo the two screws retaining the electrode assembly and carefully withdraw The spark gap should be 3 0 mm 0 5 See Fig 12 0 Assembly is the reverse ensure the gaske...

Page 29: ...nnection Transfer the push on electrical connectors to the replacement and clip back on Heat Exchanger Pool Sensor This is located in a pocket in the From Pool side of the Secondary Heat Exchanger See Fig 14 6 Pull out the retaining slipper and pull out sensor Diisconnect from the six way terminal strip on the Electrical Chassis Replacement is the reverse Water Pressure Switch This is located on t...

Page 30: ...connect the Pump mains lead from the six way connector in the Electrical Chassis Undo the two water connections of the pump and remove Transfer the mains lead to the new Pump Replacement is the reverse Heat Exchanger See Fig 14 0 The removal of the Heat Exchanger will require the draining of the Heater Undo both the Demountable connections to the Pool pipework See Fig 14 5 Undo the screws holding ...

Page 31: ...PCB M2155 SPMBG057 Relay M2688 SPMBG054 Pressure Gauge M4240 SPCOH2 003 Water Pressure Switch 650634 SPMB506 HT Lead M2142 SPMBG006 Condensate Syphon M2143 SPMBG007 Condensate Pressure Switch M2144 SPMBG008 Spark Sense Electrode M2146 SPMBG010 Flue Thermostat M2147 SPMBG011 Control Thermostat M2667 SPMBG055 Pool Temperature Sensor M4416 SPCOH2 002 Ht Exchanger Flow Sensor M2149 SPMBG013 Genie Pump...

Page 32: ...Offset Tube Venturi Heat Exchanger Flow Sensor Heat Exchanger Control Thermostat Demountable Pool Connections Fig 14 5 Condensate Pressure Switch Flue Adapter Gas Valve HT Lead Spark Sense Electrode Condensate Syphon Combustion Sample Point Air Tube Throttle Hi Limit Thermostat Condensate Pipe Safety Valve Outlet Expansion Vessel Secondary Heat Exchanger Drain Fill point with NR Isolation valve Sa...

Page 33: ...Condensing Pool Heater 30 22 12 08 This page has been intentionally left blank ...

Page 34: ...Condensing Pool Heater 31 22 12 08 This page has been intentionally left blank ...

Page 35: ...LPG Date Cleaned Pressure CO CO2 Service History Commissioning Installer Corgi No Date Working pressure mbar CO ppm CO2 Instructed User in operation Yes No Tick appropriate Date Cleaned Pressure CO CO2 Date Cleaned Pressure CO CO2 Condensing Pool Heater 22 12 08 ...

Page 36: ...Station Lane Industrial Estate Witney Oxon Tel 01993 778855 Fax 01993 703407 22 12 08 ...

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