Viewing Tender: #572
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Tender Title: Replacement of Heating Systems in Scoil an Linbh Iosa, Kilymard, Donegal Town, Co Donegal Location: Donegal Town, Donegal
Date Published: 26-Apr-2018 10:37 Deadline for Tenders: 18-05-2018 Approx Start Date Required: 01-06-2018
Tender Status:

Closed - Tender has expired. Applications are no longer being accepted.

Public Sector Category: Heating Contractors
Files Attached: 17193-M101.pdf   ()
17193-M201.pdf   ()
DoES-ITTW2-Instruction-to-Tender-Open-November-2016.pdf   ()
Tender Document Vol A.pdf   ()
Tender Document Vol B.pdf   ()
Tender Document Vol C.pdf   ()
Full Tender Text:

**Tenderers must adhere to the requirements & procedures set out in these documents prior to submission**

Tender Document Vol A.pdf
Tender Document Vol B.pdf
Tender Document Vol C.pdf

1. SITE:

The Works shall be undertaken within an existing primary school located in Killymard, Co Donegal

This project comprises the removal of an existing heating system in the school and replacement with a new oil fired central heating system including associated builders works and minor electrical works.

The Scope of Works shall comprise the following elements:‐
3.1 Element 53 ‐ Water Services Installation
3.2 Element 56 – Space Heating Installation.
3.3 Element 65 ‐ Electrical Services for mechanical equipment

The contract drawings issued with this specification are as scheduled under Appendix 2 of this specification. The drawings include the approximate location of the various components and fittings. The final locations must be marked on site by the Contractor and agreed with the Employers Representative prior to installation.

The Contractor shall keep on site a full set of drawings on which shall be marked and recorded all alterations, changes and variations, additions and omissions. These drawings shall be kept up to date during the course of the installation works.

The Contractor shall provide as required dimensioned working drawings as follows, before work is put in hand including where required.
1. Details of builders work requirements for all mechanical work.
2. Details of installation arrangements for all mechanical work.
These drawings should be fully co‐ordinated with existing structures and services.
The Contractor will act as lead co‐ordinator for all other Sub‐Contractors.

The Contractor shall submit, on completion of the works, and at practical completion stage, a full set of as‐installed drawings, showing the final layouts of all service systems, and details, as actually installed. Drawings shall be in AutoCAD disk format and shall be submitted to the Employer Representative for approval. The Contractor shall carry out any amendments requested by the Employers Representative.
On final approval by the Employers Representative the Contractor shall prepare and submit to the Engineers, a full set of drawings, for all service systems, showing the final as‐installed layouts in AutoCAD disk format and in hard copy ‐ three sets.

Builders work in connection with the contract works such as cutting or drilling of holes, chases in walls, floors and ceilings, will be carried out by the Contractor. The Contractor shall be responsible for the correct marking out of all attendances, and all other cutting to be performed by the Contractor. Dimensions, levels and alignment of pipe runs, sleeves, brackets, supports and equipment shall be marked out well in advance of all such work being undertaken.
The Contractor shall provide the following general attendances:‐ messrooms, sanitary accommodation and welfare facilities, space only for office accommodation and space only for storage of plant and materials; clearing away rubbish; protecting completed work; forming holes, pockets, mortices and chases in the structure and making good.
A schedule of Builders Attendances is included in Appendix 2 of the specification

Electricity supply shall be 220/50 cycles, single phase and all electrical plant and equipment whether of a permanent or temporary nature, supplied by this Contractor for use on the works, shall be suitable for the supply. All electrical motors associated with the mechanical equipment shall be supplied and installed by the Contractor. The Contractor shall furnish all starters, contactors, isolators etc., required for all such equipment.
All electrical work associated with the Contract, such as wiring up of control equipment, motor, etc., will be carried out by the Contractors appointed Electrical Sub‐Contractor. The Contractor shall supply all necessary wiring diagrams of control equipment and all other plant supplied under the contract.


9.1 Co‐Ordination
The Contractor shall lead co‐ordination of the building services installation. The Contractor shall liaise with electrical and all other sub‐contractors regarding final routes of distribution systems and shall ensure all drawings issued by these sub‐contractors do not conflict with other services or building works. The Contractor shall include in his costs for complying with this item.
This Contractor shall provide for a full time on‐site co‐ordinator and assistant for the full project duration.
9.2 Submittals
The Contractor shall co‐ordinate the preparation of all services submittals as detailed in the specification. Co‐ordination shall mean the Contractor taking a pro‐active role, checking all services submittals prior to submission to the design team.

Only fully qualified and competent tradesmen, together with their necessary labourers or helpers shall be employed by the Contractor on the works, which shall be carried out and completed in the best and most substantial manner. When the working of overtime is made a condition of employment in any trade, no claim for extra payment will be allowed under this heading.

The Contractor shall provide full and adequate supervision and site administration during the progress of the works and shall keep a competent and authorised Agent or General Foreman, approved by the Employers Representative constantly on the works. Such authorised Agent or General Foreman shall give his whole time to the supervision of the works and must be able to receive and act upon on behalf of the Contractor all instructions, directions or orders issued by the Employers Representative.

The Contractor shall carefully examine all drawings, schedules, specifications and other documents, and shall satisfy himself as to their accuracy and that they cover and embody the works as proposed. He shall carry out everything necessary for the full and proper execution of the works whether shown on the drawings, or described in the specification.

The Contractor shall, before covering up any work, give the Employers Representative reasonable opportunity to inspect the works already executed. He shall give all such notices and provide such facilities as may be required to Statutory Undertakings, entitled to carry out inspection, or examination of the works or part of the works.
The Contractor shall not interfere with, or disconnect or remove any existing services without prior arrangement and without prior agreement.

This Contractor shall include within his tender for all necessary insurances as required by the Main Contract Documents.

The Contractor shall instruct the Employers staff in the operation and maintenance of the various components forming the installation. He shall prepare maintenance / operational manuals as set out later in this Particular Specification.


The Contractor shall include all requirements associated with the Safety, Health and Welfare at Work Act 2005 and Safety, Health and Welfare at work (Construction) Regulations, 2013 (SI 504) as detailed in the main contract documents.


The Contractor shall be deemed to be familiar with, and have a full understanding of the latest Building Regulations and with the contents of all technical guidance documents to the Regulations. He shall ensure that all works are undertaken and completed in accordance with the Current Building Regulations and latest version of all relevant standards.


The Contractor is advised to examine the proposed programme of works and be familiar with all handover dates, completion, testing and commissioning and shall include any costs arising from compliance with the programme.


The Contractor shall provide a Tax Clearance Certificate as required by the main contract documents.


The Contractor must be a fully paid up member of the Construction Industry Pension and Sick Pay Scheme as detailed in the main contract documents.


Only fully qualified and competent workmen shall be employed on the works and this Contractor shall provide all necessary evidence to confirm the qualifications and competence, of any workman. The Contractor shall ensure that all people employed on the works are registered for PAYE and PRSI.


Persons engaged upon the works should in so far as practicable, and without affecting the efficiency of the work, be recruited from the local offices of Irish National Training and Employment Authority to the extent that the total labour requirements of the contract exceeds this Specialist core workforce.


Where Trade Names or Manufacturers Names, or marks, are used, they shall be deemed to include the words ‘or equal and prior approved’. Alternatives to the items specified or shown or scheduled, may be accepted, provided that in appearance, workmanship, quantity, performance and durability, it is at least equal to the product specified


If successfully appointed the Contractor shall provide the following information as part of the approval process. The Contractor shall include for all associated costs as part of the Tender price.
‐ Manufacturers technical data / literature for all equipment for the works.
‐ Detailed schedule of all equipment to be incorporated in the works.
‐ List of standards with which the equipment and associated components comply.


The Contractor is to allow for the complete verification of all installed plant, equipment and systems. The Contractor will ensure that Senior Representatives from each of his sub Contractors are available to assist in the verification of the systems. The Contractor will ensure that all systems are fully commissioned and witnessed prior to presentation to the Employers Representative for verification.
The Contractor will make full allowance for the verification of all systems in the development of their on‐site programme of works.
The Contract will not be deemed completed until the verification is complete to the full satisfaction of the Employers Representative.

In this specification, trade names and/or suppliers are sometimes used for the purpose of brevity and clarity of technical, aesthetic and functional intent.

Such references are for the convenience of the tenderer in clearly indicating the standard of technical, aesthetic and functional requirements sought by the specifier. The intention is not to favour one product over another or to eliminate other products/suppliers.

Other materials/suppliers may be put forward for consideration as equivalent materials to those stated on the specification.

Approval for substitution of equivalent materials/suppliers will be given where the alternative material/supplier are demonstrable equal in full accord with the original specification.

Equivalence of an offered substitution will be judged on the basis of objective, clear and independent proof of similar compliance with equal standards to those specified.

Verification shall be provided through a detailed technical dossier, drawings, data sheets and/or a test report from a recognised body, a material/product before substitution will be permitted by the Employers Representative. Any increased costs arising whatsoever from such a substitution in terms of redesign, rescheduling, health and safety issues, etc., shall be borne by the Contractor.


The Contract shall include for a thorough survey of the existing school to determine the nature and condition of all existing services and to gain a complete understanding of all plant locations, pipework routes electrical cable distribution.

These surveys shall be carried out in advanced of any works commencing on site. The surveys shall inform the need for any temporary works required to facilitate the general programming/phasing of the works.
Should the survey reveal that any of the retained services are in a deteriorated or unsafe condition the details of this shall be brought to the attention of the Employers Representative for further instruction on proposed remedial/replacement works.

The contractor must ensure that every effort is made to protect the existing building structures and features against any possible damage to the fabric or finishes.

The Contractor shall ensure that when carrying out works such as drilling, grinding, chasing walls etc which is likely to cause dust, that all measures such as damping, vacuum systems, local machine exhausts are taken to avoid spread of dust into other areas of the building.

The Contract shall include for the isolation, drain down disconnection, dismantling of the following equipment and for the manhandling/transport of all redundant plant and material off site to safe and legal disposal.
The Contractor shall ensure that when moving heavy and bulky items the appropriate number of personnel and suitable lifting/transport equipment is used in accordance with all applicable Safety, Health and Welfare at Work recommendations and Codes of Practise.

All existing radiators (except those in Staff Room, Classroom 4, Classroom 5)

Existing redundant heating pipework valves etc

Isolation and removal of redundant electrical circuits serving existing controls



This Element comprises the following services:‐

1.Installation of new hot water circuits

2.Alteration to existing cold and mains water pipework installation within school

3.Installation of new hot water cylinder

In general the new works and alterations required are indicated on the accompanying drawings.
The Contractor shall be responsible for surveying the existing installations and ascertaining the
exact location routes etc of the existing installations and for co‐ordinating new services with existing and new


The Contract shall include for undertaking an inspection and pressure test of the existing cold and mains water systems to ascertain the condition and overall integrity of the existing pipework and equipment.
This test shall be undertaken before any alteration work to the system is carried out.
The Contractor shall provide a record of the tests.
Should any of the tests reveal installations that are in unsatisfactory or unsafe condition or unsuitable for retention this shall be brought to the attention of the Employers Representative for further instruction.


All new water service pipework shall be installed using copper tube to BS EN 1057 & A1:2010 using copper capillary fittings with integral lead free solder ring to BS EN 1254‐1 and of a type to resist dezincification. Power Flux must not be used on water service pipework.


All new and (where connected) existing water service pipework shall be supported with proprietary pipe brackets at the following minimum centres.


Pipework shall be installed generally as indicated on the drawings. High level pipework in classrooms etc. and pipework at floor level shall be left un‐insulated. This contract shall include for painting all exposed pipework with 1No. coat primer, 1No. undercoat and 1No. gloss finish to an agreed colour. A proprietary paint system shall be used and be suitable for application on metal surfaces with operating surface temperatures up to 85°C without discolouring or flaking.


All pipework which is concealed from view in roof spaces, behind casings in cupboards, stores etc must be insulated with closed cell elastomeric nitrate rubber insulation such as Armaflex/AF. Insulation shall have a Class “O~” spread of flame rating and of the following insulation thickness.

Particular care must be taken to ensure maintenance of a vapour barrier on all cold and mains water pipelines.

The Contract shall include for all pipelines to be provided with adequate means for isolating and maintaining each section of the pipeline system. This shall include the installation of isolating valves as identified on the drawings and also as required for isolation purposes. Valves shall be gunmetal fullway gate type with wheel head and copper to copper compression ends complying with BS EN 12288 & BS EN 1254‐2.

Provide and fit in the store room adjacent to the boiler an indirect hot water cylinder as indicated on the drawings.
The cylinder shall be ‘Premier Plus – Model PP300 B’ Stainless steel cylinder as manufactured by Santon, Hurricane Way, Norwich or other equal and approved unit
The unit shall have a nominal capacity of 300 litres and incorporate a stainless steel primary heating coil with integrated control valve and stem type adjustable thermostat.
The cylinder shall be fully insulated with expanded polyurethane 50mm thick with external white plastisol casing.
The cylinder shall be provided with the following accessories for installation in accordance with the manufacturers recommendations:
Matched diaphragm expansion vessel
Cold water inlet combination valve
T & P safety relief valve
Combined discharge from combination valve and T & P safety valve with tundish and drain to outside
3KW integral immersion heater
Drain valve


To accommodate system expansion in the hot water circuit provide and connect a 25 litre diaphragm type expansion vessel suitable for a working head of 10bar and complying with BS 4814. Connect the expansion vessel to the systems cold feed with a 22mm expansion pipe on the cylinder side of any isolating valves. All as recommended by the heater manufacturer.


Building Regulations require that all unvented hot water storage systems of capacity greater than 15litres are installed only by persons competent to do so. It will be for the
sub contractor to demonstrate his competence to install such systems by way of demonstrating that the installer holds a current Registered Operative Identity Card as issued by CITB or equivalent qualification.


To control the secondary water temperature to wash basins or handwash facilities provide and fix at each individual basin a Chrome Plated water to water thermostatic mixing valve.
These shall be as manufactured by Walker Crossweller or other equal and approved and shall be complete with combined isolating/non return valves and inlet strainers and have an internally locked temperature outlet. Valves shall have inlet and outlet connection sizes as detailed on the drawings.
All mixing valves and accessories together with any exposed pipework shall be chromium plated.


All pipework used in this section of work shall be in light gauge copper to BS EN 1254‐1 with capillary type fittings.. Where pipework is exposed to view in toilets and kitchen areas etc this shall be chrome plated.
Pipework fittings must be of a type, which will resist dezincification.


Supply and fit in the hot water secondary return circuit as indicated on the drawing a WRAS approved single speed pipeline accelerator all as Ecocirc series Bronze Range as manufactured by Lowara complete with isolating valves at suction and discharge. The pump duty to be 0.03 l/s at 36KPa/ The pump shall be controlled via and integral on board 7 day/24hour timeswitch.


The system shall be flushed in sections with each section continually flushed until water discharges clear and free of foreign bodies.


The entire plumbing installation shall be flushed and sterilised in accordance with BS EN 806‐4 and all certificates provided and included in the operation and maintenance manuals/health and safety file.
Pipework under pressure from the mains should be chlorinated through an injection point and the free residual chlorine measured at the end of the pipeline. The Sub‐contractor shall use a dose of not less than 20g/1 (ppm) and leave the chlorine solution in the pipes for 24 hours before thoroughly flushing out with fresh water.

All chlorination of pipework under pressure from the mains must be carried out in accordance with the requirements of the local water supply utility NI Water.
As soon as possible after disinfection, the distribution pipework should be drained thoroughly and flushed through fresh water until free residual chlorine concentration at the taps is no greater than that present in the mains water until the building: water should not be allowed to remain in the system overnight. Appropriate hazard warnings should be replaced on the taps throughout the building during chlorination procedures.
Water Heaters and Hot Water Distribution should be disinfected in accordance with above, no heat source should be applied during the procedure, including final flushing. After the disinfection process they should be flushed thoroughly, brought up to operating temperature before the entire distribution system is flushed out.
A certificate shall be provided and included in the Main Contractors Health & Safety File.


Each wash basin shall be adapted to accept a new hot water tap including the removal of any existing tap hole blanking cap.
The existing cold water tap on each basin shall be isolated disconnected and removed.
Each basin shall be fitted with 2No. new taps indexed HOT & COLD. These taps shall be as Shires Non Concussive basin taps or equivalent approved tap. The contractor shall supply samples of the proposed taps for approval by the school Principal prior to order of the taps. The hot and cold services to each basin shall be provided with the thermostatic and isolating fittings all as detailed on the drawing.

Element 56 - Space Heating

This Element of work comprises the following:‐
−Provision of new low pressure hot water heating installation
−Alterations to existing low pressure hot water pipework

In general the installations shall be installed as indicated on the accompanying drawings. The Contractor shall be responsible for surveying the existing building and for ascertaining final positioning of equipment and for defining final agreed routes for pipework etc.
The contract shall include for the isolation, disconnection, dismantling and removal from the site to safe and legal disposal the following plant and equipment.
−Existing boiler / burner in basement plantroom serving Classroom 4, 5 & Staff Room
−Existing heating pumps in basement plantroom serving Classroom 4, 5 & Staff Room
−Existing heating pipework infrastructure within the building
−Existing redundant controls and associated cabling and ‘field’ devices


Under previous Phase 1 works, a new boiler and associated pipework, fittings, controls, etc. Where installed. This shall be retained and the new pipework infrastructure connected to the system as detailed on the drawings.


Supply and install new heating pipework all as indicated on the drawings.
New heating pipework shall be carried out in mild steel to BS EN 10255 with screwed and socketted fittings.
Pipework brackets shall be split pattern screw‐to‐wall type installed in a manner to allow free movement for expansion and contraction.
Chrome plated pipe collars shall be fitted where pipework visibly penetrates a wall, ceiling or floor.


Provide and install on the new primary heating circuit to the domestic hot water cylinder a new single pump as indicated from “Ecoeirc” services as manufactured by Lowara or other equal and approved and have a duty of 0.15kg/s & 30kPa
The pump incorporates a variable speed motor and is to be provided with isolating valves on suction and delivery with a non‐return valve located on the delivery connection.

To control the water temperature in the hot water cylinder provide and fit in the primary return pipework a spring return, two port, motorised control valve and actuator all as Honeywell V4073A 1039 (22mm) with matched 240v actuator.
The valve shall be controlled by a matched immersion thermostat in the cylinder set to maintain cylinder water temperature at 65°C

Pipework shall be installed generally as indicated on the drawings. High level pipework in classrooms etc. and pipework at floor level shall be left un‐insulated. This contract shall include for painting all exposed pipework with 1No. coat primer, 1No. undercoat and 1No. gloss finish to an agreed colour. A proprietary paint system shall be used and be suitable for application on metal surfaces with operating surface temperatures up to 85°C without discolouring or flaking.

All pipework within the boiler plantroom and elsewhere where concealed shall be insulated with pipeline insulation as follows:‐

All insulation shall be glass fibre sections with all end sealed and lapped. All insulation to be incombustible and self extinguishing with a Class O spread of flame grade.
Provide on all valves, flanges etc proprietry laced insulation covers such as Bridela Energy Conservation Cover.


56.9.1 Boiler Controls
The existing control panel located in the boiler house has been recently installed and is provided with the control points, inputs/outputs for the control of the new primary pump, domestic water secondary return pump and associated hot water cylinder temperature controls. The cabling for these elements shall be connected into the respective terminals of the control panel.
The contract shall include for the controls specialist – Controls and Panel Engineering Ltd, to be engaged to check and agree the connection details and for undertaking a final review, testing and commissioning of the control panel including the adjustment/resetting of time schedules for the various new and existing circuits.
All costs associated with this shall be included in the tender sum.

56.9.2 Heating in Classrooms
To control the temperature in each classroom provide on each individual single pipe circuit a motorised two port control valve controlled via an adjustable wall mounted room thermostat.
The valve and thermostat shall be suitable for operating on 220/50 cycles mains and the installation shall incorporate all cabling, switches, containment for a fully compliant installation.

Each individual circuit and piece of equipment shall be provided with isolating valves.
Sufficient isolating valves shall be provided to enable small sections of the installation to be isolated without disruption to the normal operation of the remainder of the installation.
Drain valves shall be located at all low points and manual air vents at all high points around the pipework distribution system.

Provide and install as indicated on the drawing, new steel panel radiators of sizes, outputs and configuration as detailed on the schedules on the drawing. Radiators shall be supplied complete with all brackets, air vents, radiator valves as detailed on the schedule.

Radiators shall be selected from the Mermott Ranges detailed on the drawings and provided with wheelhead lockshield, thermostatic radiator valves as indicated. Radiators shall be supplied with a factory applied “ white stove enamel finish”

The completed heating system shall be flushed out and cleaned and treated with a rust inhibitor.
The system shall be charged to the manufacturers recommended ratio with Sentinel X 300 pre‐commission cleaner and allowed to circulate for 24 hours after which the system shall be flushed through with clean fresh water.
The system shall then be charged to the manufacturers recommended ratio with Sentinel X 100 inhibitor. Test kits shall be provided to allow the clients representative to check that all chemicals are present in the correct ratio.

Pipework valves etc shall be labelled and identified in accordance with BS 1710.


56.14.1 General

The Contractor shall carry out the testing, commissioning and recording and tabulating of results of all mechanical services and associated equipment prior to handover and to the entire satisfaction of the Employers Representative.
The Contractor shall liaise with the Employers Representative and demonstrate that the system operates and is controlled in accordance with the design intent.
The Contractor shall be responsible for the programming of all plant controls with times set as required by the dwelling occupants.

56.14.2 Hydraulic Testing
On completion of the installation and before any insulation is applied the system shall be hydraulically pressure tested to 4 bar. Pressures are to be maintained for two hours and any leaks or defects repaired and tests re‐applied.

56.14.3 Heat Test
After satisfactory completion of pressure test the heating system is to put into operation and maintained at working pressure and temperature for a period of one hour after which period the systems are then to be allowed to cool down and shall be examined for any defects which if found must be made good.
56.14.4 Regulation and Circulation Test
The whole of the new installations shall be regulated to ensure design flow rate is achieved through every branch circuit in accordance with the commissioning and circulation test procedure lain down in the appropriate ~CIBSE commissioning codes. The Contractor shall provide all necessary instruments and equipment for the above tests.
56.14.5 Test Certificates
The following test certificates shall be provided for:‐
−Pressure Test Certificates for existing (retained) pipework
−Pressure Test Certificates for new pipework/fittings
−Dosing certificates for heating pipework/system
−Test/Commissioning Certificates for all controls/zone valve etc

Each test/commissioning certificate shall contain the following information:‐

−School address
−Identification of equipment and description of installation
−Test carried out
−Results and observations
−Settings and individual controls including boiler controller time


Prior to the handover of the installation the Contractor shall submit one bound volume of Operating and Maintenance instructions complete with ‘As Installed’ drawings appropriate and copies of the relevant Test Certificates.
The Contractor shall also submit two copies of simplified operating instructions which shall contain a brief action list to enable the school occupants perform a simple trouble shooting exercise prior to calling the maintenance personnel in the event of system failure or suspected system failure.


At project completion 2No sets of “As Built” drawings shall be issued to the Employers Representative for inclusion in the Health and Safety File(s). These shall be issued on CD Rom in AutoCad 2012 format and 2No sets in hard copy.
In addition the Contractor shall mark on the drawings the location and size of any zone control valves or pumps, plant or equipment outside the boiler plant room and of all pipework which has been boxed in or buried within the structure or which cannot be readily identified on inspection.
In addition 2No sets of diagrams shall be supplied with the” As Built” drawings detailing separately all the electrical circuits and wiring layouts of the installed plant. These shall also be included on the CD Rom. Diagrams to generally comply with the requirements of BS 3939.



This Element of Works includes the following services:‐
General Electrical Services Attendance for Mechanical Services equipment.
The Contractor shall employ a qualified and RECI or ECSSA registered electrical Sub Contractor to undertake the specialist Electrical Services Attendances required to operate and control the installed Mechanical Services equipment. This includes:‐
Isolation of redundant existing circuits
New electrical circuit to new hot water cylinder/sec pump
Electrical circuits for new controls
Electrical circuits for new motorised control valves
Earthing and bonding of new metallic equipment
The Electrical Sub Contractor shall also include for attendance on the contractor during testing and commissioning of the Mechanical Services.
All Mechanical Services equipment such as control valves, thermostats etc shall be supplied and installed by the Contractor and left prepared for wiring by the specialist Electrical Sub Contractor.
Electrical Testing Of Existing Installations
The contract shall include for the supply and installation of all LV and ELV wiring as required to facilitate the operation of the mechanical services equipment.
Each item served from a local isolator as indicated on the drawing. These shall be IP54 TP/N or SP/N of polycarbonate construction type “Safety Switch” as manufactured by M.K. Electrics Ltd or equivalent.
The contract shall include for installation of and connection of all control devices including motorised valves, thermostats etc.


Circuits wiring shall be contained/distributed using appropriately sized galvanised conduit system.
The Contractor shall allow for the correct drilling of holes through walls where required saw and shall adhere to spacing guidelines between LV and ELV cables at all times.

Cables shall be appropriately grouped within trunking/conduits in order to avoid overheating and mechanical damage. The Contractor shall include all necessary supports and brackets to ensure an acceptable installation standard.
On vertical drops the cables shall be protected in galvanised steel conduits. Earth wires shall be individually sleeved within conduit boxes.


−Immersion heater circuit (3.0KW SP&N)

•Flush mounted timed booster switch with neon indicator located in cleaner’s store and mounted 1200mm above floor level
•Spur outlet box located adjacent to immersion heater
•Final connection to unit in 85°C flexible heat resistant rubber insulated cable
•Switch type MK Electric Logic Plus Range with white finish
•Wired in 2.5mm2 T&E cable

−Secondary Hot Water Pump Equipment

•20 amp DP switches with neon indicator located adjacent to pump
•Wired in 1.5mm2 cable
•Switch type MK Electric Logic Plus range with white finish

−Zone Valves & Thermostats
•20amp DP switch with neon indicator located adjacent to valves
•Final connection in 85°C flexible heat resistant rubber insulated cable
•Switch type MK Electric Logic Plus range with white finish
•Wired in 1.5mm2 cable


Provide protective conductors with each circuit to new equipment as indicated in Clause 62.2.
Bonding conductors shall be provided to:‐
−New water service pipework
−New heating service pipework
−New hot water cylinder


The Electrical Sub Contractor shall remove permanently all existing electric circuits which currently supply equipment which will become redundant as part of the upgrade work.
This shall include all wiring and associated circuit components such as fuses, MCCB’s timers etc.


Supply and fit in the hot water cylinder plantroom an electric frost watch heater. This shall be as Dimplex 600 wall mounted heater or equal and prior approved.
The unit shall have a rated output of 600 watts and incorporate integral thermostatic control, frost protection and overheat protection.
The unit shall be securely wall mounted on a masonry wall where possible.


The Contractor shall include for the complete and satisfactory testing of completed installations in accordance with the procedure laid down in ETCI National Rules for Electrical Installations ET:101:2008.
The Contractor shall give the Employers Representative 10 days notice of his intention to carry out testing so that he may arrange to be present.
The Electrical Installation Inspection and Testing shall be carried out using the correct instruments (ie. Earth fault loop impedance tester, RCD tester, continuity tester, polarity tester and insulations resistance tester).
The testing instrument shall be in good condition and shall be well maintained to ensure accuracy with regard to measurement.
Inspection and testing shall be carried out in four separate stages as listed below:‐
1.Visual Inspection
2.Initial Inspection
4.Check and report on the earth continuity of central heating radiators
The visual inspection shall be made to ensure that the complete installation is carried out using equipment to Irish Standards and the Approved List of Materials issued. The inspection shall confirm:‐

1.The installation is completed with the accessories and equipment erected in accordance with the relevant regulations contained within ETCI National Rules for Electrical Installations ET:101:2008
2.Equipment and accessories installed are in no way visibly damaged so as to affect their designed function or endanger the consumer.

The initial inspection shall be carried out to ensure the installation has been installed to the afore mentioned regulations and confirm:‐

1.All conductors are connected correctly
2.All conductors are clearly identified
3.All conductors are sized correctly with regard to current carrying capacity
4.All single‐pole devices where they are to be switched for control or protection shall be connected to the phase conductor only
5.All socket outlets and double pole switches are correctly connected
6.Methods of protection against contacts are complied with:‐
i.Protection by insulation of live parts
ii.Protection by barriers or enclosures
iii.Protection by obstacles
iv.Protection by placing out of reach
7.All devices for isolation and switching are installed
8.All circuit fuses etc shall be labelled

The following listed is the sequence in which instrument tests shall be carried out:‐
1.Continuity of ring final circuit conductors
2.Continuity of protective conductors included main supplementary bonding
3.Insulation resistance
4.Protection by Electrical Separation
6.Earth fault loop impedance
7.Test for correct operation of RCD’s

The Contractor shall ensure that the aforementioned tests are carried out in every respect to the regulations laid down in ETCI National Rules for Electrical Installations ET: 101: 2008
Any test which fails to comply in any way with these regulations must be again tested and any other test which may have been affected by the failure of such a test also retested.
The Contractor should include an amount for testing and will be required when requested by the Employers Representative to provide all test equipment and carry out the test listed in the presence of the Employers Representative.

1.The polarity, continuity and insulation resistance tests shall be carried out during the installation and again at the completion of the installation to ensure full and satisfactory results.

The drawings issued with this specification are scheduled below.
These drawings are complimentary to and should be read in conjunction with this specification:
Drawing No. Title Floor
17193 M101 Heating Installation Ground
17193 M201 Alterations to Water Services Ground
17193 E101 Electrical cabling for Control Valves Ground
And Mechanical Equipment

Further Details:
What type of heating system is installed or is proposed for the building?Radiators
What type of central heating system is/ will be used int eh building?*********IMPORTANT:READ THE FOLLOWING DOCUMENTS PRIOR TO TENDER********

**Tenderers must adhere to the requirements & procedures set out in these documents prior to submission**

Tender Document Vol A.pdf
Tender Document Vol B.pdf
Tender Document Vol C.pdf

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