Manual Morco GB24 Series II (page 13 of 36) (English)

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SECTION 4 - gENEral INSTallaTION rEquIrEmENTS

4.4 AIR SUPPLY

It is NOT necessary to have a purpose provided air vent in the

room or internal space in which the boiler is installed. Neither is

it necessary to ventilate a cupboard or compartment in which the

boiler is installed, due to the low surface temperature of the boiler

casing during operation.

4.5 ELECTRICAL SUPPLY

WARNING

This appliance MUST be earthed.

Wiring external to the boiler MUST be in accordance with the

correct IEE Regulations and any local regulations.

Theboilerhasbeenpre-ttedwitha3ampfusedapproved

moulded3pinplugandyinglead,forusewith230V50Hz.

The plug should be used with an unswitched/shuttered socket

outlet complying with BS1363.

4.6 GAS SUPPLY

A propane gas supply at 37mbar is required.

Ensurethatregulatorisofsufcientcapacitytocarrythe

maximum boiler input plus the full demand for any other installed

appliances.

Ensure the connection between supply/cylinder to caravan holiday

home or park home is designed so that no pressure drop occurs.

Ensurethepipeworkisofsufcientsizetopreventapressure

dropgreaterthan2.5mbarbetweenthenalpressureregulatorto

the caravan holiday home or park home and all appliances when

the installation is subjected to the anticipated maximum load.

IMPORTANT

The complete installation MUST be tested for gas soundness.

4.7 CONDENSATE DRAIN

A condensate drain is provided on this boiler.

The drain MUST be connected to an approved drainage point.

AllpipeworkandttingsMUSTbemadeofplastic.Noother

materials may be used.

Suitable protection against freezing should be undertaken.

4.8 WATER SYSTEMS - GENERAL

This boiler is designed for connections to fully pumped sealed

system only.

IMPORTANT - A minimum length of 1 metre of copper pipe

MUSTbettedtobothcentralheatingandDHWowandreturn

connections from the boiler before connection to any plastic piping.

Central Heating System

IMPORTANT-Thesealedcentralheatingsystemmustbelled

at all times with an antifreeze / inhibitor and water mix that is

compatible with aluminium heat exchangers. The concentration

levelsoftheantifreeze/inhibitorshouldbeatleast25%inorder

to provide adequate corrosion protection. This level also provides

protection against frost from -7.5ºC to -11ºC (depending on the

product used). The maximum allowable level of antifreeze /

inhibitorisaround40%.

The only products approved are as follows:

- Fernox Alphi 11

- Sentinel X500

Failure to use these products may result in damage to the boiler

and / or the radiators in the heating system.

4.9 REQUIREMENTS FOR SEALED WATER

SYSTEMS

AtmaximumCHoutput24.24kWata20ºCdifferentialandow

rate 17.3 l/min a 3.4m wg head is available for the system

Set all radiators to give around 20ºC temperature differential.

The boiler does not normally need a bypass but at least some

radiatorsofloadatleast10%oftheminimumboileroutput.

Theseradiatorsshouldbettedwithlockshieldvalvesonly.

AsealedsystemMUSTonlybelledbyacompetentpersonusing

anapprovedllingloop(orotherapprovedmethod)betweenthe

mains water supply pipe and the central heating return pipe.

Onceused,thellingloopshouldbedisconnectedandcappedoff.

4.10 EXPANSION VESSEL

Theboileristtedwithan8litreexpansionvesselwhichis

sufcientforacoldllcapacityofupto143litres.

For other system volumes refer to table below.

Safety valve setting bar 3.0

Vessel charge pressure bar 0.5 to 0.75

System pre-charge pressure bar None 1.0

System volume Expansion vessel

  

25 1.6 1.8

50 3.1 3.7

75 4.7 5.5

100 6.3 7.4

125 7.8 9.2

150 9.4 11.0

175 10.9 12.9

190 11.9 14.0

200 12.5 14.7

250 15.6 18.4

300 18.8 22.1

For other system volumes

multiply by the factor across 0.063 0.074

4.11 PRESSURE RELIEF VALVE

Apressurereliefvalvesetat3baristtedtotheboiler.The

connection is shown in the dimensions and connection details.

The discharge pipework must be suitable for use with 3bar water

at 110ºC without damage to property and persons.

The run and exit point of the pipework should not leave a hazard

or be prone to freezing up.

4.12 DHW SYSTEMS

Check that the mains supply pressure is within the units stated in

the technical data section in this manual

Apressurereducingvalveshouldbettedifabove10bar.

In areas of low mains water pressures the domestic hot water

regulatormayberemoved(byasuitablyqualiedperson).The

boilerwillrequiretheowratetobesettogiveatemperatureof

35ºC at the tap furthest from the boiler.

In hard water areas where mains water exceeds 200ppm total

hardness,thettingofascalereducingdeviceisrecommended

(with the requirements of the local water company).

Theuseofarticiallysoftenedwater,however,isnotpermitted.

The boilers are suitable for connection to most types of washing

machine and dishwasher appliances.

We have this Boiler fitted in our Caravan and not had a trouble till we had the boiler serviced since then the boiler will deal with the hot water but if you put it onto timer for the central heating the boiler comes in and when it gets to temperature goes out but then when the temperature drops the boiler does not come back in and shows L-2 which means it’s locked out please advice what can be the trouble thankyou Submitted on 10-11-2021 at 19:52
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- condensing tack requires cleaning maybe Answered on 25-11-2023 at 18:25
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Je voudrais savoir pourquoi s affiche sur l écran de contrôle F 9 qui clignote. Et pas d eau chaude. Submitted on 29-6-2021 at 18:11
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Hot water working but no heating and no fault codes Submitted on 12-4-2021 at 18:39
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Morco GB24 Series II Manual

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