Mechanical & Renewable Energy Scope of Works and Detailed Specification Perch Rock Brixham
25th Septemeber2011 M&E Compliance Ltd Ian Sawle
Perch Rock, Brixham
2
The complete Design Solution..... | M&E Compliance Ltd
2
Perch Rock, Brixham
3
M&E Compliance Ltd The Old Mill Yeolmbridge Yealmpton Devon PL8 2EQ T: F: E:
01752 402840 01752 402840 info@me-compliance.co.uk
Prepared by:
Dan Finnimore
Authorised By :
Ian Sawle
Revision:
1
3
The complete Design Solution..... | M&E Compliance Ltd
Perch Rock, Brixham
4
New Dwelling, Perch Rock Mechanical & Renewable Scope of Works
REV
Description
Prepared By
Date
1
Tender Issue
Dan Finnimore
26-9-11
4
The complete Design Solution..... | M&E Compliance Ltd
Perch Rock, Brixham
Index
1.0
Introduction
2.0
Mechanical Scope of Works
3.0
Renewable Energy Scope of Works
4.0
Appendices
5
The complete Design Solution..... | M&E Compliance Ltd
5
Perch Rock, Brixham
1.0
Introduction
M&E Compliance Ltd has been appointed to undertake the detailed design of the Mechanical and renewable energy services for the new dwelling. The design is to be compliant with all building control and planning requirements. It is proposed to capitalise on forthcoming renewable heat incentives and feed in tariffs and all relevant MIS requirements are to be followed. Due to the importance of compliance with MIS standards, any deviation from this specification is forbidden without prior written consent. The following report details the scope of the Mechanical and renewable energy systems proposed excluding building works for the above development and specifications for a Solar thermal & PV Scheme. The design of the development is to follow the principles detailed in the relevant Building Bulletins, statutory legislation and British and European standards. No allowance shall be made for any future extension.
1.2
Site Services
All existing services are already located prior to the appointment of M&E Compliance, and as such no responsibility can be taken for their routing or design. Where appropriate new services are to be provided and will be indicated on the layouts and reference made to them in this specification. 1.3 Drawings Appendix C lists the layout drawings provided in support of the scope of works documents, these drawings have been produced to aid costing, indicating positions and quantities of equipment. The contractor will note that these drawings are design intent, and do not indicate all mechanical and electrical equipment, the contractor will need to ensure himself that all equipment as described within the document is included within their cost.
1.4
Renewable Energy
The renewable energy recommendations are based on reducing running costs, capitalising on the forthcoming Feed in Tariff and installing Solar Pv & Thermal Panels. Our specification must be followed to the letter if design responsibility is to be adopted. The installation process for the Solar PV & Thermal system is to be MCS compliant. If a non MCS certified contractor or electrician is appointed, M&E Compliance can provide MCS design, and system commissioning, and provided the contractor is suitably experienced, we can issue the MCS certification required. We would need to be involved in the contracting process, and approve contractors to carry out the works.
6
The complete Design Solution..... | M&E Compliance Ltd
6
Perch Rock, Brixham
7
2.0
Mechanical Scope of Works
2.1
Incoming Mechanical Services.
A gas supply connection shall enter the development via a dedicated gas service trench and shall be provided complete with an isolating valve, a gas meter and a gas governor for each appliance including the new boiler arrangement. During conversion the existing site water supply will be utilised as a site supply. This is to be converted into the supply to the new dwelling. The incoming cold water supply should start in the Plant room in order to balance water flows. A source of mains water is connected from the existing mains water service. The flow rate and pressure shall be sufficient to meet the requirements of the proposed system. Please refer to schematic drawings for incoming pipe sizing. Incoming flow Rate Pressure
0.9 kG/S 2.0 Bar Minimum.
The appointed contractor will determine that the proposed connection can provide the flow rates indicated above by completing a standing pressure test on site as soon as practicably possible. The test should be carried out at various times of the day, and days of the week. Any flow rates less than designed must be communicated to the M&E Engineers. If the incoming supply is found to be inadequate M&E Compliance must be made aware and a suitable Break Tank and Booster set may need to be located within the Plant Room after discussion with the client.
2.2
Above Ground Drainage
Not included in our scope of works.
2.3.1
Domestic Water Services
Hot water shall be generated by a dedicated mains gas condensing boiler located in the plant room coupled to a thermal store. The hot water outlets on the thermal stores shall be equipped with a thermostatic mixing valve to maintain hot water temperature throughout the development at 53°C maximum. The specification and type of this valve is included in the schedules. This valve should be TMV approved for use with a solar thermal system. Please refer to the schematic for its location within the system. A hot water service secondary return circuit shall be installed to maintain water temperature and to minimize dead legs. The specified pump has an in built timer and thermostat and only requires an independent fused spur.
7
The complete Design Solution..... | M&E Compliance Ltd
Perch Rock, Brixham
The installation shall strictly conform to BS.6700 and the current version of the Water Regulations. Hot and cold water supplies shall be distributed throughout the development to all sanitary fittings via a distribution network of copper pipe work. If any other format pipe is selected then attention to equivalent internal bore size must be maintained to ensure adequate flow rates throughout the property. Please consult directly with M&E Compliance after flow rate checking has been completed. Any pipe systems that are not included in the attached specification must be approved by M&E Compliance prior to installation. It is the responsibility of the contractor to ensure flow rates can be achieved within the required performance criteria if a substitution of pipe specification is presented. All water services distribution pipe work shall be thermally insulated to conform to all current Legislation, Standards and Energy Conservation Directives. As a bare minimum all pipe work should be insulated to prevent transfer of heat. All HWS pipe work within internal zones to be insulated with a minimum of 19mm Armaflex or similar. All pipe work in external locations or unheated ducts to be compliant with water byelaw 49.
All terminations prior to sanitary fittings are to include Ball-O-Fix valves or similar.
2.4
Heat Source & Distribution
The main boilers are to be mains gas condensing system boilers with an efficiency of 90% (SEDBUK A)or over, serving the entire needs of the development. It is to feature weather compensation. The boiler will require a mains gas connection, overflow & Tundish. Particular attention should be paid to the general plumbing arrangements, as it does not follow the traditional S Plan or Y Plan methodology. Please refer to the detailed schematic diagram and manufacturer’s installation guidance manual of the thermal store. The heat emitter will be Underfloor heating in the screeded floors to the Ground floor. Please refer to the UFH layouts for zoning. All bathrooms and en-suites to have supplementary heat supplied via towel radiators connected to the primary heating circuit. The towel radiators are to be controlled by a separate channel on a time controller located in the plant room to enable them to be heated during the summer season independently of the heating system. Underfloor Heating is to be designed by a specialist supplier and each room is to be independently zoned and thermostatically controlled. Please refer to our Layouts for zoning. The Underfloor heating is to be supplied with un-managed manifolds, with dedicated flow meters on each circuit. The system should be designed and presented for approval prior to ordering. The manifold is to receive a weather compensated supply direct from the system boiler. Local circulators and over temperature sensors to be installed at each manifold. All thermal outputs to be determined with a maximum flow temperature of 45C. This is to accommodate low a temperature water system in the future if required. The underfloor heating is to be commissioned by a suitable qualified contractor, and the written certificate presented with the client handover package.
8
The complete Design Solution..... | M&E Compliance Ltd
8
Perch Rock, Brixham
The manifold controller should feature separate local call for heat, via a motorized 2 port valve. It should also have an over-temp thermal cutout governing the opening of the 2 port valve. Thermostats are to be Low Voltage, and each room is to be independently controlled by a programmable thermostat. The chosen thermostats should be high quality, flush fitting and come in a variety of finishes. Heatmiser PRT-NTS or similar. Please liaise with Architect for final selection. Where possible all LTHW pipe work shall be concealed within ceilings spaces, risers, partitions and pipe chases. All exposed pipe work will be insulated and preferably boxed in to protect the users. All LTHW distribution pipe work shall be thermally insulated to conform to all current Legislation , British Standards and Energy Conservation Directives. A minimum of 13mm Armaflex is to be fitted to all heating pipe work, exposed and concealed.
Pipe Sizing and layouts. All heating F&R pipe work to commence in copper, and run to each manifold. Please refer to layouts for manifold locations and towel radiator suggested locations. Please liaise with architect regarding final positions of towel radiators. All pipe work sizes are marked on the layouts.
2.5
Ventilation
Standard Extract Ventilation with window trickle vents to meet part F of the building regulations.
2.6
Controls
The underfloor heating will be controlled via dedicated thermostats, calling for heat when required by means of energizing a 2 port valve. A Heatmiser system is to be used, with PRT-NTS thermostats or similar. The towel radiators are all to have TRV radiator thermostats and a lock shield valve. The plumbing is to be bespoke as indicated on the schematic layout. The system has been designed to enable future forms of renewable energy to be connected as and when it becomes commercially viable. This is a thermal store based system with hot water priority. All controls are to be based around the thermal store temperature, with a high and low temp thermostat calling for heat . Separate time control is required for the towel radiators and the hot water pumped return system. For controls please liaise directly with M&E Compliance to ensure the high low switching philosophy is met.
2.7
Cooling
There are no Cooling Services
9
The complete Design Solution..... | M&E Compliance Ltd
9
Perch Rock, Brixham
3.0
Renewable Energy
3.1.1
Solar PV
It is planned to install a solar PV array on the rood in the area designated on the plans. The installation should be undertaken by an MCS registered specialist subcontractor. All works should be MCS compliant and follow the guidelines laid out in MIS3002. Please refer to Roof Layout plans. The specified panel is 1680x960mm is size, and is to be mounted on a low ballast flat roof framing system with a 20 degree Pitch. If the system is substituted attention must be paid to the azimuth angles to ensure no shading is created by the front array. The chosen subcontractors must carry MCS and REAL accreditation, and be suitable qualifies to issue an MCS certificate.
3.1.1
Solar Thermal
A 2 panel array is to be located on the garage roof. It is to be a pressurised system, and each panel is to be a 25 evacuated tube array. The panel mountings are to be bespoke. There is to be a twin pumping station and dedicated Delta T controller. System expansion is to be provided by a suitable solar expansion vessel. Please refer to schematic layout. A Class 2 heat meter is to be installed. Flow and return pipe work is to be pre-insulated corrugated stainless steel with crimp fixings. No soldered copper fittings are allowed. All elements of the installation must be compliant with MIS standards. The system may be installed by the site plumbers, but they must be MCS registered for Solar Thermal. M&E Compliance is able to certify this installation if required if the chosen contractor does not carry MCS certification. We must be involved at an early stage if this is the case. NOTE – Builders Work The on site contractors are to have a suitable stainless steel frame made up to accommodate the panels. The chosen panel supplier can arrange this. Please ensure the frames are created at the correct angle as indicated on the layouts. The frame should be secured directly into the roof structure below. A low ballast array is not suited to a roof of this size due to the proximity to the roof edge.
3.2
MVHR
No practical for this development.
10
The complete Design Solution..... | M&E Compliance Ltd
10
Perch Rock, Brixham
Appendices
Appendix A
Schedule of Drawings
Appendix B
Mechanical Design Criteria
Appendix C
Specialist Quotations
11
The complete Design Solution..... | M&E Compliance Ltd
11
Perch Rock, Brixham
12
Schedule 1 Tender Drawings The following M&E Compliance Drawings are to be read in conjunction with this specification: M&E Drawing No.
Title
Scale
1135SB-M100
Domestic Water Layouts
As noted
1135SB-M300
Heating Layouts
As noted
1135SB-M700
Schematic plumbing layout
As noted
1135SB-M800
Underfloor Heating Layouts
As noted
1135SB-R100
Renewable Energy Roof Layouts
As noted
1135SB-R101
Renewable Energy Roof Layouts
As Noted
Layouts
12
The complete Design Solution..... | M&E Compliance Ltd
Revision
Perch Rock, Brixham
Appendix B
Mechanical Design criteria
Index A 1.0
Mechanical Basis of Design
A 2.0
Schedule of Suppliers
A 3.0
Cold Water Storage Break Tank & Booster
A 4.0
Circulating Pumps
A 5.0
Boiler & Cylinder Specification
A 6.0
Solar PV & Thermal Specification
A 7.0
MVHR
A 8.0
Pipe work & Fittings
A 9.0
Water Treatment
A 10.0
Thermal Insulation
A 11.0
Pressurisation & Expansion
A 12.0
UFH Specification
A 13.0
Rainwater Harvesting
A 14.0
Miscellaneous Items
13
The complete Design Solution..... | M&E Compliance Ltd
13
Perch Rock, Brixham
A 1.0
14
Mechanical Basis of Design
The following sets out the proposed performance and design criteria for the mechanical engineering systems. The design criteria will be as specified or in accordance with the recommendations of the following:-
1) 2) 3) 4) 5)
Thermal output requirements CIBSE Guides Statutory Undertaking Regulations CDM Regulations Pressure System Regulations
External Design Conditions External design conditions for thermal load calculations and plant sizing shall, in general, be determined in accordance with the CIBSE Guide, Section A2, Weather and Solar Data. The following external design conditions have been selected upon which plant sizing will be based. -6C external conditions
Internal Design Conditions Living Areas Sleeping Areas Bathrooms
21C 20C 22C
Ventilation standards Ventilation to be compliant with the CIBSE recommendations for ventilation and The Building Regulations Part F.
14
The complete Design Solution..... | M&E Compliance Ltd
Perch Rock, Brixham
A 2.0
15
Schedule of Suppliers
Solar PV
Specialist MCS Certified Contractor. To be selected by the client. A quotation has been provided from 5D solar for Estimating.
UFH
Specialist Sub Contractor. A quotation has been provided for illustration.
Boiler
Rehema Avanta Plus 24kW system boiler, or similar approved
Cylinders
Akvaterm 500L Thermal Store c/w solar coil.
Solar Thermal
Solar Supplies Ltd richard@solarsuppliesuk.co.uk 0115 8540626 07940916219
15
The complete Design Solution..... | M&E Compliance Ltd
Perch Rock, Brixham
A 3.0
Cold Water Storage Break Tank & Booster
Not Required.
16
The complete Design Solution..... | M&E Compliance Ltd
16
Perch Rock, Brixham
17
A 4.0
Circulating Pumps.
REF
Application
Manufacturer
Reference
P1
Heating System Pump
Grundfos
15-60
P2
Primary Circulator
Grundfos
UPS 25-80
P3
HWS Secondary Circulator
Grundfos
UP 20-14BXUT
Manifold pumps by specialist provider.
Or Similar Approved
17
The complete Design Solution..... | M&E Compliance Ltd
Perch Rock, Brixham
A 5.0
Schedule of Boilers & Cylinders
Thermal Store Akvaterm 500 solar thermal store, with HWS coil and solar coil. Akvaterm is available from a number of merchants and distributers. Please refer to schematic layout for system configuration. As the cylinder is located in a semi exposed environment the choice of thermal store is important. The store should feature 100mm polyurethane insulation as a minimum thickness.
Boiler The system boiler should be a mains gas SEDBUK A condensing boiler. Remeha Avanta Plus 24 KW or similar approved. If another brand is planned please ensure it has the same features and performance of the above specified boiler.
18
The complete Design Solution..... | M&E Compliance Ltd
18
Perch Rock, Brixham
A 6.0
Solar PV Specification
A 2.3 kWp PV array is to mounted using a Scirrocco low ballast roof system or schletter low ballast roof system. Please refer to roof layouts for location. Panels are to be Antaris M230 MCS certified with black surrounds. The inverters are to be PowerOne Aurora IP65 rated or equivalent and all connecting 230V cabling to be run back to the incoming mains distribution board and meter location. All DC cabling to be installed in compliance with MIS3002 MCS guidelines. The chosen contractor is to be MCS registered and must issue an MCS certificate upon completion and a client handover pack.
A 6.1
Solar Thermal Specification
Please refer to roof layout drawings and the schematic layout for further information. All systems and components should be MCS certified where required. All fittings, controls and accessories are available from Solar Supplies Ltd.
19
The complete Design Solution..... | M&E Compliance Ltd
19
Perch Rock, Brixham
A 7.0
MVHR
Not Required.
20
The complete Design Solution..... | M&E Compliance Ltd
20
Perch Rock, Brixham
A 8.0
21
Pipe work & Fittings
Service
Material
LTWH Heating Tank Cold Water Hot Water Services
LT Gauge Copper BS1387 LT Gauge Copper BS1387 LT Gauge Copper BS1387
UFH
Pert-Al-Pert
A 9.0
Fittings
Pipe Size
Proprietary
Refer to layouts
Proprietary
Refer to layouts
Proprietary
Refer to layouts
Compression
16mm x 2mm
Water Treatment
Following the satisfactory completion of all pressure tests, the whole of the systems which are to be filled with treated water shall be chemically cleaned and flushed out using a temporary pump prior to the initial filling and dosing of the systems’ water. All potable pipe work to be flushed and treated in accordance with regulation.
21
The complete Design Solution..... | M&E Compliance Ltd
Perch Rock, Brixham
22
A 10.0 Thermal Insulation
All pipe work to be insulated to the requirements of water byelaw 49, insulation against frost and heat gain Insulation to all pipes in exposed or semi-exposed zones to be:
Tube Size
Insulation Wall Thickness (Tubolit or Equivalent) 0.035 W/mK
15mm
25mm
22mm
19mm
28mm
19mm
35mm
9mm
42mm
9mm
Anywhere cold and hot water pipes run in a void together or in close proximity to each other, pipe insulation with a minimum 13mm wall thickness should be used (Armaflex or similar). All pipe work within the cylinder/plant room should be insulated with 19mm wall Armaflex insulation. All valves and fittings to be insulated with Armaflex sheet or larger bore pipe insulation to prevent energy loss. This plant room is a semi exposed location. Particular attention should be paid to effectively insulating services in this area. Insulation to be clipped in place using proprietary fixing systems and tapes. This installation is to be compliant with MIS3001/2 MCS qualifying criteria.
22
The complete Design Solution..... | M&E Compliance Ltd
Perch Rock, Brixham
A 11.0 Pressurization & Expansion
Heating Expansion vessel Suitable system expansion vessel is to be provided within the plant room. The units should be sized to accommodate the UFH system as well as the Primary distribution circuits. This section will be updated once detailed UFH design has been completed. It is estimated that a 50L expansion vessel is required. This will be subject to final UFH choice and the final cylinder selection.
Domestic Hot Water Expansion Vessel A potable expansion vessel of 24L should be fitted and should also function as a shock arrester.
Solar Expansion vessel. A 30L solar expansion vessel is required.
23
The complete Design Solution..... | M&E Compliance Ltd
23
Perch Rock, Brixham
24
A 12.0 Underfloor Heating The underfloor heating should be sized to provide sufficient output to heat the building using the following criteria. Outside Temperature Indoor Temperature
-6C 22C
Delta T
7.5 to 10C
Mean Flow Temp
40C
A schedule of output on a room by room basis should be prepared and presented for approval. All Manifolds to feature a 2 port zone valve and safety thermostat. Each zone to be controlled by a wax actuator. Flow meters on every zone. Manifolds to be un-managed ready to receive a weather compensated supply ,they must feature a local slave pump capable of providing the correct duty for the connected manifold. The pump should be acoustically mounted to reduce vibration and noise transmittance. The system should be installed and pressure tested for 60 minutes at 6 Bar pressure. This should be witnessed by a senior site manager, and a manifold test certificate issued by the specialist installer. Screeding should only commence after receipt of this certificate. All thermostats to be fully programmable, and feature night setback. A local manifold controller should be used, and this will provide a signal for the manifold 2 port valve to open, and send a signal to the boiler to call for heat. All thermostats to be low voltage. Thermostats and manifold controllers to be Heatmiser PRT-NTS thermostats Heatmiser UFH1 wiring centers Bathrooms and en suits will have additional heat provided by towel radiators. The towel radiators should be connected to the heating primary circuit and be able to be on during the summer season when heating is off. A dedicated time controller should be provided within the plant room. They each should have a lock shield valve and TRV.
24
The complete Design Solution..... | M&E Compliance Ltd
Perch Rock, Brixham
A 13
Rainwater harvesting
Not included on this development.
A 14
Miscellaneous Items
Please allow for: Fire stopping of all pipes and cables where they penetrate fire resisting partitions or barriers. Refer to architects drawings for confirmation of the location of fire breaks. Acoustic sealing of all penetrations through acoustic insulation and systems All penetrations through the external air tightness membranes must be effectively sealed Installation of sanitary ware in line with clients requirements. Schedule and fitments to be provided by the client. Commissioning as required Construction program as required. Client Handover.
25
The complete Design Solution..... | M&E Compliance Ltd
25