L-UNIVERSITA TA’ MALTA UNIVERSITY OF MALTA

Msida MSD 2080 - Malta Msida MSD 2080 - Malta

DIPARTIMENT TAL-PROCUREMENT PROCUREMENT DIRECTORATE

IMPORTANT NOTICE TO PROSPECTIVE BIDDERS

Quot 228/53/15

THE SOFT COPY OF THIS QUOTATION IS AVAILABLE FOR

DOWNLOAD FROM WWW.UM.EDU.MT/PROCUREMENT.

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DOCUMENT WILL BE UPLOADED ON THE SAME WEBSITE.

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TEL: (356) 2340 2212/3/5 FAX: 2131 4307

Date Published: 6th October 2015

Closing Date: 21st October 2015 at 10.00hrs

CALL FOR QUOTATIONS

Operational Programme I – Cohesion Policy 2007-2013

Investing in Competitiveness for a Better Quality of Life

Quotation part-financed by the European Union European Regional Development Fund (ERDF)

Co-financing rate: 85% EU funds; 15% National Funds

Investing in your future

This quotation document is made up of 18 pages excluding this cover.

SUBJECT: Call for Sealed Quotations for the supply, delivery, installation and

commissioning of a geothermal-source heat pump for research and

experimental purposes, for the setting up of a Solar Laboratory, at the

University of Malta.

Document Ref: Quot 228/53/15

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General Information 1. Project Background Malta is part of the evolving knowledge based economy and this project once completed:-

will help the country to ensure that the supply of its human resource meets the demand of the changing labour market and;

will also contribute to provide additional opportunities for better-paid jobs, increasing youth attainment and science/technology graduates;

hence developing a knowledge-based culture upon, which a sound Maltese economy has been shown to base itself.

2. Project description The National Strategic Plan for Research and Innovation: 2007-2010 highlights the importance of investment both in resources that will increase the number of science and technology masters and doctoral graduates, initiatives that will increase the level of academia-industry collaboration in research and innovation, as well as increasing the necessary laboratory infrastructure to support these objectives. This project complies with all three recommendations. The aim of the project is to develop a state-of-the-art solar research lab which will enable Malta to better take advantage of this energy resource and put the Universty of Malta and the country at the forefront of solar energy research. The siting of the project is in the existing Institute for Sustainable Energy (ISE) Site in Marsaxlokk.

3. Scope The Institute for Sustainable Energy (ISE) requires the equipment for the setting up of a Solar Laboratory and at the same time upgrading its present facilities to a wider and more flexible network In this respect, the University of Malta is interested in obtaining quotations for the supply, delivery, installation and commissioning of:-

a geothermal-source heat pump for research and experimental purposes, as specifically detailed in Article 4 hereunder;

4. Technical Specifications

General Specifications

1. All equipment must be current commercial technology.

2. All equipment shall be CE certified, type tested and certified as compliant with MSA European Standards or equivalent.

3. All equipment shall be suitably rated for the temperature and humidity variations of the Maltese Islands 5-35 °C, 10-85% relative humidity or better.

4. The heat pump and ancillary products (pumps, buffer tanks, etc...) shall be weather resistant for outdoor use under a temporary shaded area. The fancoil (indoor unit) shall be installed indoors in an existing room.

5. Full performance guarantee for at least 2 years on all products.

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Detailed Technical Specifications

A 5 kW or up to 10% larger, high efficiency (A+ or better), reversible, water-to-water geothermal-source heat pump (230V/50Hz, R410a or similar), without domestic hot water storage, but complete with plate heat exchangers, scroll compressor, on-board controllers, and having:-

1. two hydraulic pumps for geothermal and building side, both working with a minimum flow rate of 1500 l/h at 5 m head;

2. thermal resistance on both heat exchangers to avoid icing problems; 3. insulated buffer tank (150 - 200 l), covered by plastic covering or similar external protection; 4. one fan-coil unit (5 kW or up to 10% larger), complete with remote control and thermostatic

three valve for the by-pass, when the working fluid is out of target temperature; 5. serial card RS485 or equivalent for ModBus and remote control drive for controlling the heat

pump by an external PC (Windows 8 as operating system) connected via LAN; 6. Data logging system for electrical energy consumption of pumps, heat pump and fan coil, fluid

flow rate through geothermal circuit and heat pump circuit, temperatures for inflow and outflow circuits on the side of the geothermal and the fancoil circuits;

7. The heat pump should also work with fluid temperature below 0°C, to cover occasionally extreme conditions.

8. Data logging system, as amplified further down in the specifications below, for the above installation

Part A – General 1.1 SCOPE OF WORK

These specifications detail the requirements for the supply and delivery of equipment to be used for research on the performance of a heat pump connected to an existing shallow ground heat exchanger for space heating and cooling of a test room at the Institute for Sustainable Energy in Marsaxlokk, Malta (and eventually to possibly power it with a separate PV system), for research purposes. This section describes three separate actions: 1. Supply and delivery of a water-to-water, high efficiency (A+ or better), reversible heat

pump, a fan coil unit, a management and control system device, a buffer tank, balance tanks with floating ball valves, pressure pumps, a circulating pump, ethylene glycol, pipes, shut off ball valves, non-return valves, pressure meters, temperature sensors, flow meters, pressure release valves, automatic air vents, data logger and other fittings as specified and listed in the bill of quantities, for a complete working system.

2. Installation and commissioning of the equipment. The contracting authority reserves the right to pursue this service at the quoted price within one year from notification of award (Letter of Acceptance). The contracting authority may also opt to decline the service of installation and commissioning. The works to be quoted for shall include:

Installation of the above mentioned equipment for a complete working system.

Connecting up of equipment to electrical supply points.

Setting up of the heat pump parameters.

Testing and commissioning of all equipment and of the overall working system.

3. Supply and installation of a data logging system capable of recording and storing information for eventual export to a computer, on the performance of the system as follows:

Electrical energy consumption and power factor of each water pump, heat pump and fancoil;

Fluid flow rate in the geothermal and heat pump circuits;

Inflow and outflow temperatures from the geothermal field, the heat pump and the fancoil unit.

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The contracting authority reserves the right to pursue this service at the quoted price within one year from notification of award (Letter of Acceptance). The contracting authority may also opt to decline the service of installation and commissioning. If such proposals are awarded, the works for the installation of the data logging system will form part of this tender (including connection of sensors, laying of data logging cables, protection from interference or noise on the data signals, etc). For clarity’s sake, the preparation of the geothermal field itself together with the laying of pipes and reinstatement of the ground itself at the geothermal field, shall NOT form part of the works of this tender. The works referred to, start from the point of entry/exit of the geothermal field pipes up to the heat pump and including the fan coil unit (indoor unit) to the room. The figure below shows the extent of works.

The required installation is shown in the figure below.

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1.2 METHOD STATEMENT

For the installation, testing and commissioning of equipment part, the contractor shall furnish the Client with a detailed description of the method statement to be employed in the installation of the various services. This method statement is to be approved by the Client prior to the works being taken in hand. The method statement shall include a plan of execution of works with a Gantt chart and necessary drawings.

1.3 PERFORMANCE PROGRAMME The supplies shall be delivered, installed and commissioned within eight (8) weeks from the last date of signature on the Contract or date of Letter of Intent whichever comes the earlier

1.4 MECHANICAL EQUIPMENT WARRANTY PERIOD A guarantee on all equipment shall be offered for a minimum period of 24 months against

faulty workmanship and materials and on the operation of the system as a whole. If during this period any parts or equipment have to be changed, the guarantee on that part is to be renewed for another year from date of replacement. The prospective tenderer shall also guarantee the supply of spares up to the next five years following the award of the contract.

Part B – Products Technical Specifications 1.5 GEOTHERMAL HEAT PUMP

The bidders are required to quote for a high efficiency (A+ or better), geothermal source, water to water, reversible heat pump, capable of raising water temperature up to 55°C, for space heating and cooling by utilizing a fancoil unit. Such heat pump shall meet the following parameters: Type: High efficiency (A+ or better), Reversible, , ground source

heat pump with R410a refrigerant (or similar) and complete with on-board controllers. No domestic hot water is required.

Application: Hydronic Terminal – Heating/Cooling a room by circulating warm/cold water through a fan coil unit. Renewable energy is sourced from an onsite shallow-ground geothermal field.

Power Supply: The electrical supply of the heat pump shall be 230 Volts 50 Hz, single phase

Rated/Nominal Cooling & 5 kW, or up to a maximum of 10% – Cooling mode: Plant Heating Capacity: (user) side cooling exchanger water (in/out) 12°C/7°C;

Source (geothermal) side heat exchanger water (in/out) 30°C/35°C – Heating mode: Plant (user) side heating exchanger water (in/out) 40°C/45°C; Source (geothermal) side heat exchanger water (in/out) 0°C/-3°C. No domestic hot water is required.

EER/COP: COP of at least 4 for constant speed heat pump (at least Class A+) or between 2 and 5 for inverter-driven heat pump across the full range of operation, or better

Heat Exchanger User Side in Cooling & Heating: The heat pump shall contain a circulator pump, which is

capable of circulating water in the secondary circuit (user side) with a minimum flow rate of 1500 kg/hour at a pressure head of 5m (50kPa). This shall be capable to withstand high temperatures up to 55°C.

Heat Exchanger Source

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Side in Cooling & Heating: The heat pump shall contain another circulator pump, which is capable of circulating a mixture of water and ethylene glycol in the primary circuit (geothermal source side) with a minimum flow rate of 1500 kg/hour at a pressure head of 5m (50kPa). This shall be capable to withstand high temperatures up to 55°C and shall also be capable to work with fluid temperature below 0°C in certain circumstances.

Noise Power: 60 dB(A) (or less) The water circuits shall come complete with: Safety Valve; Expansion tank; Manual filling assembly; Pressure Gauge; Air Vent Valve; Drain Valve on both plant and source circuits; and Differential pressure switch on source side and plant side. Electrical Components: Consumer Unit (distribution board); 2-pole MCB; 2-pole RCD (Residual Current Device);

1-pole MCB; Contactor and

Isolator. Other Features: High efficiency plate exchangers in AISI 316 stainless steel

with low pressure drops, fitted with heating element for frost protection;

Hermetic scroll type compressors, equipped with the crankcase heater and thermal protection;

Case panels shall be insulated within low noise material for further improvement of silence;

Rubber vibration damper.

1.6 MANAGEMENT AND CONTROL SYSTEM DEVICE

The geothermal space heating and cooling system shall be supplied complete with a management and control system device. This shall include a remote key pad with temperature and humidity probes that provide flexible settings. The remote keyboard kit with wired indoor and outdoor temperature sensors shall allow a dynamic control of the delivery temperature water, optimize comfort in the room and increase energy efficiency. The electronic board of the management and control device shall allow for:

- A wired remote control, having back-lit display and complete with remote temperature and humidity probes;

- An outdoor temperature sensor for water plant (geothermal) side modular set point compensation;

- A programmable timer allowing the creation of an operating profile containing up to 6 time bands; and

- A contactor that switches on and off the circulating pump on the user side and the fancoil unit simultaneously.

1.7 FANCOIL UNIT

The bidders are also required to quote for a matching fancoil unit to be installed in the room to provide space heating and cooling. Such fancoil unit shall meet the following parameters: Type: Wall/Floor Mounted Fancoil Unit with cabinet (vertical

installation); 2-Pipe System Configuration Application: Hydronic Terminal – Heating/Cooling a room by circulating

warm/cold water through the fan coil unit. Power Supply: The electrical supply of the fancoil unit shall be 230 Volts 50

Hz, single phase Rated/Nominal Cooling & 5kW or up to a maximum of +10% – Cooling Mode: For a

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Heating Capacity: set room temperature of 25.5°C; Chilled water (in/out) 7°C/12°C. Heating Mode: For a set room temperature of 19.5°C; Hot Water (in/out) 45°C/40°C

Air Flow: The air flow through the fancoil unit shall be in the range of 880 m3/hr and 990m3/hr

Water Flow in Cooling & The water flow in the fancoil unit shall be 1500 kg/hr Heating: (+/- 10%) Pressure drop in Cooling & The pressure drop through the fancoil unit shall not Heating: exceed 30kPa in both heating and cooling mode Noise Power: 60 dB(A) (or less) Electrical Components: Double Pole Switch; and

1-Pole MCB Other Features: Coils with aluminium fins and copper pipes; Washable air filters; Drain PVC Pipes; Quiet operation with low noise level; Remote control/Wall Mounted Control (this shall be able to

integrate the fancoil unit with the heat pump and the circulating pump);

High and Low Fan Speed Capability; Heating and Cooling Temperature Controls;

A thermostatic three way valve for by-pass when the working fluid is out of the target temperature.

1.8 BUFFER TANK

A buffer tank is to be introduced on the user circuit side to store the hot and cold water before being circulated through the fancoil unit. This will enhance the efficiency of the system as it reduces the continuous switching on and off of the heat pump. The buffer tank shall meet the following criteria: Type: Free-Standing Well-Insulated Buffer Tank Material: Glass-enameled steel or Marine grade Stainless Steel Buffer

Tank with a minimum internal tank thickness of 2 mm. Nominal Capacity: Between 150 litres and 200 litres capacity Other features: The buffer tank shall withstand a pressure of at least 6 bar at

a temperature of 55°C Contains two temperature probes (one for the heat pump

and one for the circulation pump installed between the buffer tank and the faincoil unit in the room) to read the water temperature inside; and

Includes any necessary fittings to connect the outlets of the buffer tank to uPVC pipes (PN 10) having a nominal diameter of 50 mm. Such connections/fittings shall withstand a pressure of at least 10 bar at a temperature of 55°C.

1.9 BALANCE TANK WITH A FLOATING BALL VALVE

The two circuits (user side and source side) are to be filled automatically by installing two balance tanks with a floating ball valve each. The inlet of such balance tank shall be connected to the water mains supply so that the tanks will be filled automatically, when their water level drops down. On the other hand, the outlet of the balance tank shall be connected to a pump with a pressure switch, so as to refill the circuits automatically when their pressures fall down below the set pressure. The bidders are required to quote for two balance tanks with a floating ball valve each, in which one of the tanks is to hold water ONLY, whilst the other one is to hold a mixture of water and ethylene glycol. These tanks shall have a capacity of around 50 to 80 litres each. Furthermore, such tanks shall be UV stabilized, durable and made up of weather resistant engineered plastics, as these are to be installed outdoors. The balance tanks are to include a direct mechanical lever operated Ball Float Valve each to serve the purpose of a liquid level control. Also, the balance tanks shall come complete with

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all the necessary fittings, for their inlets to be connected to a ½” shut off valve (polybutylene) and for their outlets to be connected to a uPVC shut-off valve, for ease of maintenance when needed. The pipework to which the outlets are to be connected shall be UPVC (PN10). The pipework to which the outlets are to be connected shall be UPVC (PN10) and having a nominal diameter of 25mm.

1.10 PUMP WITH PRESSURE SWITCH

When the pressure in either of the circuits (user side and/or source side) drops down below the set pressure, the circuits are to be automatically refilled from the balance tanks by using water pumps with electronic pressure control switches. The bidders are required to quote for two pumps; one shall be suitable to work in water only, whilst the other one shall be suitable to work in a mixture of water and ethylene glycol. The pumps shall be capable of delivering the working fluid with a flowrate of 1.5 m3/hr (1500 kg/hour) at a pressure of at least 0.5 bar and shall be suitable to operate in high temperatures up to 55°C. However, the pumps shall not exceed a maximum pressure of 2 bar. The pump’s main components shall be in AISI 304 (DIN 1,430 1) or AISI 316 stainless steel. The electrical supply of the pumps shall be 230 Volts 50 Hz, single phase. Such pumps shall be equipped with the following:

- An inlet strainer to prevent larger particles from entering the pump. - A reliable non-return valve. This shall have a very short closing time to reduce any

water hammer effect to a minimum. - Pre-assembled pressure switch for automatic operation. - Water flow meter reading units in litres or meters cubed. This shall be fitted

directly with the UPVC pipes PN10 25mm diameter, in which no reducers are acceptable. Meter shall be tamper resistant and have good low flow accuracy.

- Settable Pressure Relief Valve from 0.05 to 2 Bar and made of brass. This shall be fitted directly with the uPVC pipes PN10 25mm Diameter and must be projected to drain such that any relief would be visible.

- Pressure Gauges (0 - 4 Bar) fitted to the uPVC pipe PN10 25mm Diameter, made of Brass or Stainless steel and have full rotary movement for longer life.

- All necessary fittings for the pump to be connected to uPVC pipes PN10 25mm diameter.

One of each component shall be suitable to work with water only, whilst the other shall be capable to operate in a mixture of water and ethylene glycol. Also, the pump shall be equipped with the following electrical components:

- Built-in Capacitor; - 1-Pole MCB; - Isolator

1.11 CIRCULATING PUMP

The bidders are also required to quote for a circulating pump to be installed in-line with the buffer tank and the fancoil unit. This circulation pump shall be of the centrifugal type suitable for pumping water at high temperatures up to 55°C. It shall be capable of delivering water with a flowrate of 1500 kg/hr at a pressure of at least 0.5 bar. However, the pump shall not exceed a maximum pressure of 2 bar. The pump’s main components shall be in AISI 304 (DIN 1,430 1) or AISI 316 stainless steel. The electrical supply of the pump shall be 230 Volts 50 Hz, single phase. Such pump shall be equipped with the following:

- A reliable non-return valve. This shall have a very short closing time to reduce any water hammer effect to a minimum.

- Water flow meter reading units in litres or meters cubed. This shall be fitted directly with the UPVC pipes PN10 50mm diameter, in which no reducers are acceptable. Meter shall be tamper resistant and have good low flow accuracy.

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- Settable Pressure Relief Valve from 0.05 to 2 Bar and made of brass. This shall be fitted directly with the uPVC pipes PN10 50mm Diameter and must be projected to drain such that any relief would be visible.

- Pressure Gauges (0 - 4 Bar) fitted to the uPVC pipe PN10 50mm Diameter made of Brass or Stainless steel and have full rotary movement for longer life. This shall be heavy duty for operation with water.

- All necessary fittings for the pump to be connected to uPVC pipes PN10 50mm diameter.

- 1-Pole MCB. - Built-in Capacitor.

The pump shall also be complete with the required MCB and have its own control panel enclosed in a weatherproof enclosure to IP65. The panel shall include at least the following:

- Run/Trip Indicator, - Contactor; - High temperature protection; - Motor burn out protection; - Overload protection.

The pump’s control panel is to be coupled with the fancoil unit in such a way that the circulation pump and the fancoil unit operate simultaneously.

1.12 ETHYLENE GLYCOL

The bidder is requested to quote for the working fluid to be used in the source side. This shall be a mixture of water and ethylene glycol (50/50 mix).

1.13 PIPES

The bidders shall quote for two types of pipes, which are UPVC pipes and polybutylene pipes. The latter are to be used at the inlet of each balance tank to connect to the water mains supply, and shall have a diameter of 15mm. The rest of the piping used in the system shall be in rigid UPVC rated at a working pressure of 10 bar (PN10), of which two diameters are needed, being 25mm and 50mm. The piping leaving the heat pump on the user side shall be constant throughout, having a diameter of 50mm. The 25mm UPVC pipe shall be used on the outlet of each balance tank. All pipework used in this project shall be capable to work in high temperatures up to 55°C, and shall be UV stabilized, durable and weather resistant engineered plastics, suitable for outdoor use. Furthermore, the pipework between the heat pump and the fancoil unit, and that between the heat pump and the ground heat exchanger shall be well insulated as necessary. All pipes shall be in rigid U-PVC rated at a working pressure of 10 bar (PN10), having a nominal diameter of 25mm and 50mm, UV stabilized, durable and weather resistant engineered plastics. Such piping shall be suitable to work in high temperatures up to 55°C. Also, all piping and accessories shall be supplied with their corresponding insulation lagging and covered with UV resistant tape. The insulation shall not be less than 19 mm thick. The piping system between the heat pump and the fancoil shall be fully insulated and buried underground at a depth of about 1.5 metres, in an existing trench.

1.14 SHUT OFF VALVES

The bidders shall quote for two types of shut-off valves which are Double Union Shut off Ball Valves in rigid U-PVC and polybutylene shut-off valves. The latter valves are to be used on the inlet of each balance tank in connection with the 15mm polybutylene pipe. The UPVC double union shut-off ball valves are to be used in the rest of the installation, the diameters of which vary depending on the size of the pipe on which they are to be installed. Such UPVC shut-off ball valves shall be rated at a working pressure of at least 10 bar (PN10) at high temperatures up to 55°C. Furthermore, these shall be UV stabilized, durable and weather

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resistant engineered plastics, suitable for outdoor use. All parts coming into contact with water shall be made of plastic. Such ball valves shall come in full bore and manually lever operated. These shall also have all the required fittings for the valves to be installed in line with U-PVC pipes PN10, 25mm and 50mm diameters. Additionally, those valves connected on the source side shall be suitable to work in a mixture of water and ethylene glycol.

1.15 NON-RETURN VALVES

The bidders are required to quote for non-return swing check valves which shall be constructed from brass with a rubber faced flap which closes for reverse flow, sealing the valve. Such valves shall be reliable and shall be rated to operate in pressures up to 10 bar (PN10) at high temperatures up to 55°C. These shall come complete with all the necessary fittings (including unions) so as to be connected to the U-PVC pipes PN10 25mm and 50mm diameters. One of the 25mm non-return valves shall be suitable to work in a mixture of water and ethylene glycol, whilst the rest are to work with water only.

1.16 PRESSURE METERS

Pressure meters/gauges (0 – 4 Bar) shall be made up of Brass or Stainless Steel, have full rotary movement for longer life and shall be heavy duty for some of them to operate with water only and others to operate with a mixture of water and ethylene glycol. Such pressure meters shall be rated to operate at a pressure of 10 bar at high temperatures up to 55°C. These shall come complete with all the necessary fittings (including unions) to be fitted to U-PVC pipes PN10 25mm and 50mm diameters.

1.17 TEMPERATURE SENSORS

Temperature sensors/gauges are to be used to detect the temperature of the working fluid in the system. These sensors shall be rated at a working pressure of 10 bar at high temperatures up to 55°C and shall come complete with all the necessary fittings, including unions, so as to be connected to the U-PVC pipes PN10 having 50mm diameter. Two of the temperature sensors shall be suitable to work in a mixture of water and ethylene glycol, whilst the other two shall be suitable to work in water only.

1.18 FLOW METERS

Flow meters (reading units in litres or meters cubed) shall be made up of brass and shall come complete with all the necessary fittings (including unions) to be fitted directly with U-PVC pipes PN10 25mm and 50mm diameters (no reducers are acceptable). These shall be tamper resistant, have good low flow accuracy and are rated to operate in pressures up to 10 bar and temperatures up to 55°C. Two of the flow meters shall be suitable to work in a mixture of water and ethylene glycol, whilst the rest are to work in water only.

1.19 PRESSURE RELEASE VALVES

This system shall be equipped with pressure release valves to control or limit the pressure in the system when operating in heating mode. Bidders are to include in their submission, pressure release valves which are designed or set to open at a predetermined set pressure of 2 bar to protect the equipment/components in the circuit from being subjected to pressures that exceed their design limits. Such pressure release valves shall be capable to operate at high temperatures up to 55°C and shall be made up of brass or bronze. When the set pressure (2 bar) is exceeded, the release valve shall relief the pressure in the circuit by allowing the pressurised fluid to flow from an auxiliary passage out of the system. The quoted pressure release valves shall come complete with all the necessary fittings (including unions) to be connected with uPVC pipes (PN10) having a nominal diameter of 25mm and 50 mm. Some of the pressure release valves shall be suitable to work in a mixture of water and ethylene glycol, whilst the rest shall be suitable to work with water only.

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1.20 AUTOMATIC AIR VENTS

The bidders are also required to quote for automatic air vents to be installed in this heating and cooling system, so as to provide automatic discharge of the air trapped inside the circuits. Such automatic air vents shall meet the following parameters: Material (Body): Brass/Bronze Nominal Operating Pressure: 2 bar (at a temperature of 55°C) Maximum Operating Pressure: 10 bar Maximum Operating Temperature: 55°C The quoted automatic air vents shall come complete with all the necessary fittings, including unions, to be connected with uPVC pipes (PN10) with nominal diameters of 32mm and 50mm. Also, some of the automatic air vents shall be suitable to work in water only and others are to work in a mixture of water and ethylene glycol.

1.21 OTHER FITTINGS

All fittings shall be in rigid U-PVC rated at a working pressure of 10 bar (PN10) at high temperatures up to 55°C, having nominal diameters of 25mm or 50mm, UV stabilized, durable and weather resistant engineered plastics. Some of the fittings shall be suitable to work in a mixture of water and ethylene glycol, whilst others shall be suitable to work in water only. Furthermore, such fittings shall be supplied with the corresponding insulation and shall be of the same manufacture and brand as the pipes. These will include elbows, union connections, etc. The awarded bidder shall be responsible for the compatibility of fittings with the U-PVC pipes offered; and shall ensure that they satisfy the pressure requirements.

1.22 INSTALLATION, TESTING AND COMMISSIONING

Bidders shall also include in their submission an option for the installation, testing and commissioning of the geothermal heat pump and the associated mentioned components. If such option would be awarded: i. The work shall be performed by competent and skilled workmen under the direct control

and supervision of the manufacturer’s experienced foreman and in accordance with the manufacturer’s installation instructions.

ii. The exact placement of each component will be discussed prior installation on site by the person in charge with the Contractor.

iii. The electrical installation of all equipment shall be carried out according to the latest IEE

Regulations and according to Enemalta Regulations. All material used in the installation shall be CE certified. The installation shall be conducted by a competent person in possession of a valid Enemalta Wireman’s Licence A. The electrical supply of the units shall be 230 Volt 50 Hz, single phase. MCB’s and connecting up in the main distribution would also form part of this quotation.

iv. The contractor shall set up the parameters of the geothermal heat pump accordingly. v. The contractor shall provide adequate pipe support to ensure that all pipes are run

neatly and in straight lines. Pipe work bends shall be used minimally and if used these shall be within the range specified in the manufacturer`s recommendations. Also, flow direction shall be stencilled clearly on the pipe itself.

vi. All piping and accessories shall be properly insulated and finished in a smooth, clean

workmanlike manner with all joints tightly finished.

vii. Branded materials shall be assembled, constructed and joined in accordance with the manufacturer's instructions and recommendations.

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viii. The preparatory works for the installation and reinstatement of the heating and cooling system will form part of this tender (including drilling of holes, laying of pipes, cleaning, carting away of construction material, etc).

ix. All the works provided as part of the contract shall be inspected and commissioned to

the satisfaction of the client before handing over. x. All installations shall be inspected and tested in sections as the work proceeds and on

completion as complete systems and it shall be noted that the client may require inspecting or testing any equipment during installation. All tests shall be arranged in co-operation with the client and he/she shall be given prior notice of the time, location and nature of the test. No test shall be considered valid unless the client is present.

xi. Any defects occurring at any time during the test duration shall be made good and a

complete re-test shall be carried out, all at no cost to the contract. Where failure during a test, inspection or commissioning process results in damage to the building fabric and/or services not provided as part of this contract, or requires subsequent builders’ work then these items are to be made good at no extra cost to the contract.

xii. Commissioning: All circuits in the system shall be filled with the working fluid, vented as

necessary, and brought to operating conditions and the flows then regulated to the design values. Following regulation and balancing procedures the system shall be put into operation and examined to ensure that the installation is operating correctly.

xiii. The completion period for the supply, delivery, installation, testing and commissioning of

all works shall be within eight (8) weeks from notification of award.

In such case, the contractor is considered fully responsible for the supply, delivery, installation, testing and commissioning of the geothermal heat pump and its corresponding components for a complete working system. Details of all proposed items are to be supplied together with copies of the specifications of the offered equipment, HIGHLIGHTING all the required specifications on the data sheet.

1.23 DATA LOGGING SUPPLY, INSTALLATION AND COMMISSIONING

Bidders shall also include in their submission a complete data logging system for the geothermal heat pump and the associated mentioned components (fancoil and junction point of the geothermal field), as well as the installation of the data logging system. The data logging system shall provide the following minimum requirements: i. (Total Qty. = 4 energy and power factor loggers): Energy and power factor reading for

each water pump on the heat pump side and on the fan coil unit side (excluding the 2 pressure pumps of the top-up tanks), the heat pump itself (compressor) and the fan coil unit (fan);

ii. (Total Qty. = 3 flow rate meters): Fluid flow rate at the inlet or outlet of the geothermal field near the junction of heat pump, the inlet or outlet of the heat pump itself leading to the fancoil and the inlet or outlet near the fancoil unit

iii. (Total Qty. = 6 temperature sensors): Temperature of the fluid at the inlet and outlet of the geothermal field near the heat pump, the inlet and outlet of the heat pump itself leading to the fancoil and the inlet and outlet near the fancoil unit.

, A single electronic control data processing system (hardware + software) is to be provided to monitor and integrate all the above sensors together and store all data in a dedicated computer/laptop. The PC/laptop itselfshall NOT form part of this offer, as it will be provided by the Contracting Authority. The PC/laptop shall use a Windows 8 operating system and therefore the provided control shall be capable of interfacing with such a PC/laptop. Alternatively, logging may be carried out by using individual data loggers that must be capable of storing sufficient data as detailed below and have all the relevant connectivity to a PC/laptop and any required software. Data logging shall have the following minimum specifications:

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(1) Accuracy of sensors: a. Energy readings: ±0.01 W or better; b. Power factor readings: 0.01 or better; c. Flow rate reading: ±0.01 m/s d. Temperature readings: ±0.2 °C or better.

(2) Data collection frequency: 1-second readings for all parameters. (3) Data storage capacity: 2 weeks of integrated 10-second readings for all monitored

parameters. The 10-second integrated readings are the average of 1-second readings, and hence the data logger/s shall be able to carry out this procedure internally.

(4) Where applicable, the electronic data processing system shall be:

(a) CE certified hardware. (b) Commercially available hardware (not custom-made). (c) Hardware fully protected against noise induced by 50 Hz AC frequencies. (d) Software compatible with Windows 8 operating system. (e) Software easily programmed and requiring no specialised training. (f) Sensors to be fully compatible with the data processing system and to be supplied

inclusive of all interface requirements. Sensors shall be suitable for outdoor use.

Guarantee for all sensors and data logger/s or data processing equipment shall be for 24 months.

(5) Alternatively where applicable, the individual data logger/s shall be:-

(a) CE certified to IEC61326:2002 or equivalent. (b) Calibrated. A calibration certificate shall be provided by the successful bidder. (c) Supplied with an IP65 casing for outdoor use. The casing shall be large enough to

accommodate the data logger and any immediate peripheries such as battery pack and solar charge controller.

(d) The casing shall have sufficient holes through which data and power cables may be passed. All holes shall have appropriate gromets to ensure perfect sealing against humidity, dust and rain.

(e) Programmed in an easily configured using straight forward commands or drop-down menu configuration facility, using dedicated software.

(f) Capable of communicating with a computer for data transfer via at least ethernet connection.

(g) supplied complete with software on a CD, perpetual licence and all relevant documentation.

(h) able to accept all instruments required to monitor the above mentioned parameters. Any additional interfaces that may be required shall be supplied as part of the tender.

(i) protected against electrostatic discharge (ESD protection). Data logging shall have the following minimum specifications:-

(Total Qty. = 4 energy and power factor loggers): Energy and power factor reading for each water pump on the heat pump side and on the fan coil unit side (excluding the 2 pressure pumps of the top-up tanks), the heat pump itself (compressor) and the fan coil unit (fan);

(Total Qty. = 3 flow rate meters): Fluid flow rate at the inlet or outlet of the geothermal field near the junction of heat pump, the inlet or outlet of the heat pump itself leading to the fancoil and the inlet or outlet near the fancoil unit

(Total Qty. = 6 temperature sensors): Temperature of the fluid at the inlet and outlet of the geothermal field near the heat pump, the inlet and outlet of the heat pump itself leading to the fancoil and the inlet and outlet near the fancoil unit.

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Special Notes to the Technical Specifications

(a) Prices are deemed to be inclusive of delivery, installation, and commissioning; (b) Equipment to be functional on 220 – 240V single phase or 415V three phase (as applicable) and

50 Hz, capable of withstanding power failures, and should not be damaged due to 'trip outs'; Power cables are to be terminated with connectors in conformance with Maltese regulations.

(c) Equipment is to be guaranteed to be of the latest technology and to be energy efficient and where

appropriate, software is to be guaranteed to be upgradeable as and when required by the University of Malta, and certification accordingly tendered to this effect;

(d) Local after-sales technical support by qualified personnel must be provided, through the

submission of proper training certification or through the submission of an undertaking by the prospective tenderer to train specific personnel on the equipment, in the successful event of award.

5. Literature Detailed supporting literature is to be supplied, both for:-

the proposed equipment and;

any applicable software;

6. Prices The INCOTERM2010 applicable shall be Delivery Duty Paid (DPP) but exclusive of VAT and prices are deemed to be inclusive of supply, delivery, validation and qualification (operational qualification and performance qualification) and operator and application training if applicable.

In support of the prices detailed on the “Quotation Form”, prospective bidders may, if they deem it appropriate, submit as well a detailed quotation on their official letterhead. 7. Period of Execution The place of acceptance of the supplies shall be at the University of Malta and the time-limits for delivery shall be a maximum of eight (8) weeks from the date of Acceptance of the Quotation, through the issue of an official purchase order which Purchase Order would be issued in two (2) originals, one of which will have to be endorsed by the successful bidder, in confirmation of his acceptance. 8. Payment Payment will be done at maximum of 60 days from the issue of the relevant Provisional Acceptance Certificate. 9. Warranty The Contractor shall warrant that the supplies are new, unused, of the most recent models and incorporate all recent improvements in design and materials. The Contractor shall further warrant that none of the supplies have any defect arising from design, materials and workmanship. This warranty shall remain valid for a period of two (2) years after provisional acceptance on parts and labour both for hardware and software as applicable 10. Spare Parts The successful tenderer shall warrant that spare parts for the system would be available for a period of not less than five (5) years after the supply and delivery and shall thereafter give notice to the University of Malta, prior to the discontinuation of production of the spare parts.

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CALL FOR QUOTATIONS

SUBJECT: Call for Sealed Quotations for the supply, delivery, installation and commissioning of a geothermal-source heat pump for research and experimental purposes, for the setting up of a Solar Laboratory, at the University of Malta.

Document Ref: Quot 228/53/15

Prospective bidders are invited to quote for the required equipment, as described earlier on in Article 4 - Technical Specifications, on the attached “Quotation Form”.

The Quotation, duly referenced: “Quot 228/53/15”, should be deposited in the tender box at the:- Procurement Directorate,

2nd Floor, Administration Building,

University of Malta – Msida MSD 06

MALTA

by not later than Wednesday the 21st October 2015 at 1000 hrs.

Foreign suppliers may forward their submission by a means of a recorded delivery (official registered

postal service or courier service) ensuring that their sealed envelope bears the relevant Quotation

Number in an easily identifiable manner.

If within the “binding period” Clause 2 of attached ‘Terms and Conditions’ you will not have received any order, you may assume that your quotation has not been accepted. Yours Faithfully Karm Saliba Head, Procurement Section University of Malta

(Due to the fact that this correspondence is in an electronic format it is not signed)

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Quotation Form

Quot 228/53/15

Call for Sealed Quotations for the supply, delivery, installation and commissioning of a geothermal-source heat pump for research and experimental purposes, for the setting up of a Solar Laboratory, at the University of Malta.

Item no.

Qty

Description

Unit Cost Delivered Duty Paid-

DDP (including,

Duties & Other Taxes/Charges)

but excluding VAT

in

€

Total Cost Delivered Duty Paid-

DDP (including, Duties

& Other Taxes/Charges)

but excluding VAT in

€

1 1

A geothermal-source heat pump complete with accessories and ancillaries and as further amplified in the technical specifications with specifc reference to Item 1.1 to Item 1.22

2 1

A complete data logging system for the geothermal heat pump and the associated mentioned components as further amplified in Item 1.23 of the technical specifications.

Grand Total including duties and other taxes/charges (Delivered Duty Paid – DDP) but excluding VAT.

I undertake to provide the goods detailed above at the prices quoted, within the requested delivery times, in line with the applicable articles of the “General Information” of this Quotation Document and to be bound by the terms and conditions mentioned overleaf. Name and Surname (Block Letters) _________________________________________ On behalf of: ___________________________________________________________ Signature of Person Quoting _____________________

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Terms and Conditions

1. Prices on DDP Terms (inclusive of all taxes, duties and charges as applicable) shall be quoted in Euro but shall be exclusive of VAT.

2. Quotations submitted shall remain binding for a period of 90 days, from the closing date fixed for the receipt of quotations.

3. Any unsatisfactory service such as failure to meet commitments either partially or in their entirety or failure to deliver goods in time will be recorded in Suppliers’ Performance Records.

4. Successful bidders shall be bound to conform in all respects with VAT legislation and regulations.

5. The University of Malta is not bound to accept any quotation and shall not give reasons for the acceptance or rejection of any particular offer.

6. Prospective Suppliers are being informed that queries on this Call for Quotation Document and/or

its contents, are only accepted up to five (5) days before the closing date on e-mail: tenders.procurement@um.edu.mt and the University of Malta is bound to forward replies to these queries at the latest two (2) days before the closing date. No further clarifications will be provided after this date.

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DETAILS OF BIDDER

Document Ref: Quot 228/53/15

Name: (in Block Letters)

Address:

E-mail Address:

Telephone Number/s:

Fax Number/s:

Cell Phone Number:

VAT Registration no:

Signature of Tenderer:

Date:

Name in Block:

ID Card Number:

Filename: Quot 228/53/15 - ERDF 335 - Heat Pump Z/procurement/quotdoc-draft