18R0021_Attachment_1_AA1_00233-5_SOW.PDF

DEPARTMENT OF THE ARMY

UNITED STATES ARMY GARRISON ITALY

DARBY MILITARY COMMUNITY

PUBLIC WORKS OFFICE

APO AE 09613

Project

AA1 00233-5

REPAIR HVAC SYSTEMS

BLDGS 901, 3041, 3050, 4013

SCOPE OF WORK/PERFORMANCE WORK SCHEDULE

Consisting of 33 pages and 1 enclosures

ING. PAOLO SERRAGLINI

Chief, Engineering Services Branch

Prepared by:

STEPHEN L. DONNELLY, PE

Public Works Manager on 18 July 2018 APPROVAL DATE ________________

IMVI-LPW-F 18 July 2018

STATEMENT OF WORK

Project AA1 00233-5P, Repair A/C systems at buildings 901, 3041, 3050, 4013, ASA

& Camp Darby - Livorno, Italy.

Basic Project and Options. The project consists of one basic project only. No optional work is included

Phase 1 (Design) Description:

I. Scope of work.

1. Introduction

In this phase the work consists of designing details and providing calculations and everything necessary to define all parts of the works in scale required to fulfill the scope of work. Design analysis and project drawings shall be signed by a registered professional engineer.

This scope of work concerns the heating and air conditioning systems renovation of buildings

901, 3041, 3050, and the upgrade of the A/C system’s control of building 4013.

Buildings 3041, 3050 and 4013 are located in the Ammunition Storage Area (ASA). Building

901 is located in Camp Darby.

All buildings are occupied and shall be occupied during construction. All works shall be designed and planned to limit disruptions for the occupants, preferring the period of not-use of the HVAC systems.

The efficiency of the new Heating and A/C systems shall be in accordance with Italian energy saving regulations.

2. Existing condition

BUILDING 901

The heating generator is a fuel oil boiler (70 kW heating power), placed in a dedicated boiler room in the building. The boiler is equipped with two dedicated circulating pumps (one spare).

Pumps are placed into the boiler room. The chimney is in masonry, external to the boiler room.

The fuel oil tank (5,000 liter capacity, sheet metal single skin) is placed outside the building, close to the boiler room. It is covered by a metal canopy and has a containment basin in concrete. The fuel oil pipes from the tank up to the boiler room runs buried, without leak detection system.

The cooling generator, air to water heat pump type (model CLINT CHA/CLK/WP 81 – 24.2 kW heating capacity – 19.8 kW cooling capacity, gas R410A, year 2015, equipped with circulating pump on board), is located outdoor on a dedicated basement with fence, close to the boiler room. The heat pump is in good conditions and shall be left in place. It will feed the new system, after its upgrade.

The hydronic circuit is dual type (heating/cooling), with two circulating pump (one spare).

Radiators circuit have dedicated pipes and pumps. The summer/winter changeover valves are located into the boiler room. The pipes from the heat pump up to the boiler room run on sight outside the building.

Pipes inside the building runs, starting from the boiler room, above the false ceiling and then descend into the walls up to the internal units.

The internal units consist of fan coils, floor mounted, equipped with three way valves. Three fan coils are new and will be left in place, while the others are in bad shape and need to be replaced. All fan coils are equipped with outdoor air inlet grilles. Two room thermostat are installed in the open space, when in the other room control panels are installed on board.

Radiators are installed in the bathrooms and in the entrance.

The bathrooms exhaust air system and its air ducts and grilles will not be modified.

The server room is cooled with a dedicated A/C system (direct expansion type) that is not part of this scope of work.

The building voltage is 230V three phases. An existing panel is installed in the boiler room, fed from the main distribution panel located in the office area. A transformer 230/400V is currently installed in the boiler room to feed the heat pump. All the electrical system in the boiler room, as well as the existing control system, shall be completely replaced.

BUILDING 3041

The heating generator is a fuel oil boiler (44 kW heating power), placed in a dedicated boiler room in the building. The boiler is equipped with two dedicated circulating pumps (one spare).

Pumps are located into the boiler room. The chimney is in steel, and is inside the boiler room.

The fuel oil tank (2,500 liter capacity, sheet metal single skin) is placed outside the building, far from the boiler room. It is covered by a metal canopy and has a containment basin in concrete. The fuel oil pipes from the tank up to the boiler room run buried, with leak detection system.

The cooling generator, air to water chiller type (model UNIFLAIR CRAC0161A – estimated cooling capacity 27 kW, gas R407C – 6 kg, year 2005, equipped with circulating pump), is located on a dedicated basement with fence, close to the boiler room.

The hydronic circuit is dual type (heating/cooling), open vessel. The summer/winter changeover valves are located into the boiler room. The pipes from the chiller up to the boiler room run buried. Pipes inside the building run, starting from the boiler room, above the false ceiling and then descend into the walls up to the internal units in the office space, when are on sight in the bays.

The internal units in the office space consist of fan coils, floor mounted, equipped with three way valves, control panels on board and outdoor air inlet grilles. In the two bays fan coils are installed on wall, duct type with external air grilles, equipped with three way valves and control panels on wall. Radiators are installed in the bathrooms.

The existing exhaust air system and its air ducts and grilles shall not be modified.

The building voltage is 400V three phases. An existing panel is installed in the boiler room, fed from the main distribution panel located in the corridor area. All the electrical system in the boiler room, as well as the existing control system, shall be completely replaced; electrical panel dedicated for the feeding/control of the existing air compressor shall be replaced too.

Existing chiller is currently fed from the Main Distribution Panel but the new heat pump shall be fed from the new Boiler Room Distribution Panel.

BUILDING 3050

The heating generator is a fuel oil boiler (67 kW heating power), placed in a dedicated boiler room in the building. The boiler is equipped with two dedicated circulating pumps (one spare).

Pumps are located into the boiler room. The chimney is in steel, external to the boiler room, with basement in concrete.

The fuel oil tank (3,000 liter capacity, sheet metal single skin) is placed underground outside the building far from the boiler room, protected with a concrete structure. The fuel oil pipes from the tank up to the boiler room runs buried, with leak detection system.

The cooling generator, air to water chiller type (model RC T55 22U5S – 48.9 kW cooling capacity, gas R407C – 12 kg, year 2005, equipped with circulating pump), is located on a dedicated basement with fence, closed to the boiler room. The buffer tank is installed in the boiler room, on the return pipe.

The hydronic circuit is dual type (heating/cooling), with dedicated pumps for heating into the boiler room. The summer/winter changeover valves are into the boiler room. Pipes, starting from the boiler room, runs above the false ceiling and then descend into the walls up to the internal units.

The internal units are fan coils, floor mounted, equipped with three way valves, control panels on board and outdoor air inlet grilles. Two fan coils are new and will be left in place, while the others are in bad shape and need to be replaced. Radiators are installed in the bathrooms.

In the three bays fan coils are installed on wall, two per bay, duct type with external air grille, equipped with three way valve and control panel on wall.

The bathroom exhaust air system and its air ducts and grilles will not be modified.

The building voltage is 400V three phases. All the electrical system in the boiler room, as well as the existing control system, shall be completely replaced.

BUILDING 4013

The HVAC system is substantially new (built in 2011) and does not need to be replaced. Only the DDC control system (Kieback-Peter) needs to be replaced because not compatible to be interfaced with the management system of the Base.

The HVAC system is essentially composed by:

- a fuel oil boiler, installed in a dedicated boiler room, equipped with anti-condensate pump

- a chiller, installed inside the building,

- n.2 circulation pumps (chilled/hot water)

- an air handling unit, with heat recovery installed on the roof

- a heat recovery unit, with re-heating coil, installed into the false ceiling

- two cassetta type fan coil

These are essentially the existing controls of the equipment:

- boiler: on/off/alarm – outdoor air temperature probe – three way valve control including temperature probe.

- chiller: on/off – alarm.

- circulating pumps: on/off.

- air handling unit: on/off-alarm, inlet/ outlet motorized air dampers control, pressure switch (filter), antifreeze thermostat, heating/cooling three way valve control and temperature probe

- heat recovery unit: on/off – alarm- three way valve control

- fan coil: control panel on wall

Electrical system shall not generally be modified unless some modification are needed consequently to the replacement of the control system.

3. General description of the existing Utilities Monitoring and Control System

An existing Utilities Monitoring and Control System (SIEMENS Desigo – BACnet protocol) is currently operating in the USAG Italy Darby Military Community. HVAC systems of various buildings of the base are connected to this system; the UMCS monitors all the main technical values of the HVAC systems (temperatures, operation status, alarms etc.) and control all the main equipment (heat pumps, pumps, valves, fans etc.). Two dedicated workstations for the UMCS are currently installed, one in bldg 5155 and one in bldg 5140; these workstations are complete with a dedicated software with graphic pages.

4. Works required

Works required to be done are, but not necessarily limited to, the followings:

4.1. BUILDING 901

Removals/Demolitions bldg 901

Works shall include (but not necessarily be limited to):

- Removal of the existing fuel oil boiler including: burner, chimney connection into the mechanical room, circulation pumps, pipes and accessories into the mechanical room.

The masonry chimney shall be left in place, the hole in the wall inside the boiler room and the outdoor inspection door shall be walled up, repaired and painted to match the adjacent surfaces. Removal of the sign, the outdoor temperature probe and the emergency shut-off valve outside the boiler room and restore and paint the wall

- Removal of the metallic door of the mechanical room and its frame. Removal of the basement of the boiler.

- Removal of all the heating and cooling pipes into the mechanical room and outside the building, while the distribution pipes inside the building will be left in place to be reused.

- Removal of the fuel tank and accessories. The fuel tank shall be emptied, cleaned and disposed in accordance with the technical specification and all applicable environmental criteria. Removal of the canopy and the concreate structure and restoration of the area including lawn sowing.

- Removal of the underground fuel oil pipes, including taking of soil samples to verify possible contamination due to oil leakages. Restoration of the area as the existing.

- Removal of the domestic water pipe into the mechanical room and the drainage pipe.

- Removal of 7 fan coils floor mounted. Removal includes the sectional valves, the three way valves and control panels.

- Removal of 10 fan coils outdoor air grilles.

- Removal of 3 radiators (two in the bathrooms and one in the entrance).

- Removal of all the electrical system in the boiler room. Cables feeding the fan coils in the building shall not be removed.

- Removal of the cable, the transformer and the outdoor conduits, boxes, circuit breakers connecting the existing heat pump.

- Removal of the feeding cable between the Main Distribution Panel and the Boiler room

Panel.

- Removal of the existing control system, cables included.

- Removal of all other elements /items as required by the design.

Architectural/Structural works bldg 901

Architectural works shall include (but not necessarily be limited to) the following:

- Install a new aluminum door with new frame, same dimensions of the removed one, complete with key lock, self-closing mechanism, grid with anti-insect screen and key case for universal key housing.

- Perform plastering and painting of all the internal walls and ceiling.

- Fix the concrete floor after the basement removal and provide a new floor resin type over the concrete.

- Fix the masonry, restore exterior plaster and painting after the replacement of the boiler room’s door.

- Excavation, backfilling and lawn sowing after the removal of the fuel oil tank’s canopy and basement.

Mechanical works bldg 901

Mechanical works shall include (but not necessarily be limited to) the following:

- Cleaning of the existing pipes that will remain in place. Cleaning shall be done with products suitable to guarantee the removing of debris, mud or other dirty and the pipes protection. Cleaning shall be done before the installation of the new equipment.

- New buffer tank 300 liter capacity, placed into the mechanical room. The puffer tank will work as hydraulic separator between the primary circuit (to/from the heat pump) and the secondary circuit (to/from the building). The buffer tank shall be equipped with sectional valves, expansion vessel, air vent and point of discharge to permit the complete emptying for tank cleaning. Tank shall be ErP ready certified, energy efficiency class no less than C. The buffer tank shall be equipped with an electric coil of 3 kW that will work only during low outdoor air temperatures.

- Installation of two temperature probe on the supply and return pipes from the heat pump

- N.2 new circulation pumps (one spare) with efficiency in accordance with ErP ready regulation. Pump flow shall be as per the need of the building, the head as per the calculated loss of the secondary circuit. The pumps shall be controlled by the DDC system. Each pump shall be equipped with 2 anti-vibrating joints, two valves, and two manometers.

- New pipes to connect the existing heat pump to the existing pipe into the mechanical room. On each supply/return pipe outside the building shall be installed: n.1 flexible joint, n.1 sectional valve, n.1 air vent, n.1 discharge device, n.1 thermometer and n.1 manometer. A dirty separator with magnet filter properly sized shall be installed on return pipe to protect the Heat Pump. Pipes shall be insulated in accordance with DPR

412/93 class 100%, covered with aluminum sheet 8/10 mm.

- New domestic water pipe to connect the water main to the building and feed the A/C system. Install a sectional valve where the pipe from water main enter the building, a socket filter, a pressure reduce valve with manometer, a water meter suitable to remote reading to be interface with the new DDC system, a back flow preventer, a sectional valve. On the branch that feed the building insert a sectional valve. On the branch that feed the A/C system place a sectional valve, a back flow preventer, an automatic filling valve and a sectional valve. Install a new drainage pipe to convey the discharges of the back flow preventer out to the building.

- Installation of n. 7 fan coils floor mounted in place of the removed ones. The heating and cooling capacity (calculated at the medium speed) of the new fan coils shall not be less that the existing ones. Fan coils shall have DC fan (0-100% speed control) and shall be equipped with three way valves with insulation and a control panel on board of each fan coil. Each control panel shall permit the temperature control but limited to

+/- 2ºC from the set point (20ºC in winter and 26ºC in summer), on/off, speed control

(0-automatic-manual), air probe and water probe to turn off the fan coil when the temperature is below the working condition and do the automatic summer/winter changeover.

- Cleaning of the existing external air grilles and inlet ducts

- Cleaning of the existing condensate drainage pipes and pits.

- Installation of three radiators in place of the removed ones, including new supports if necessary, pipes modification and wall restoration. New radiators shall be sized to have the same heating capacity of the existing ones, considering a temperature of feeding water 45ºC instead of 60ºC. Radiators shall be equipped with thermostatic valve.

Electrical works bldg 901

Electrical works shall include (but not necessarily be limited to) the followings:

- Disconnect the electrical feeding of the fan coils to be removed

- Reconnect the existing cables to the new fan coils, installing if necessary new conductors to feed the three-ways valves and the local control panels.

- Install a new ordinary and emergency lighting system in the boiler room. New lighting fixtures shall be LED type.

- Install new power outlets in the boiler room:

o an industrial power outlet (CEE type) 16A 230V 2P+G, IP55 as minimum o an industrial power outlet (CEE type) 16A 400V 3P+G, IP55 as minimum o a civil power outlet (P40 type) 10/16A 230V 2P+G, IP55 as minimum

- Provide the electrical feeding of all the mechanical system equipment.

- Install a new electrical panel IP55 in the boiler room, feeding:

o the new mechanical system equipment (resistance of the puffer tank included) and the existing heat pump;

o the new lighting system of the room;

o the new power outlets of the room.

o the new DDC (Direct Digital Control) system, control panel included.

The new panel shall be complete with:

o Voltage presence spy-lights (for each phase);

o a Surge Protection Device, coordinated with the SPD installed in the Main

Distribution Panel (if present);

o a Digital Electrical Power Meter measuring the electrical consumption of the mechanical system; the power meter shall be interfaced with the new DDC system;

o A couple of spy-lights for each pump (green and red) indicating the status of operation;

o A Selector Manual/0/Automatic for each mechanical equipment (pumps, heat pump, fan coils etc.) to bypass the DDC and allow a manual control of the entire system in case of DDC’s fault.

New electrical system shall be 400V TN-S type; inside the boiler room and outdoor the new cables shall be routed inside galvanized steel conduits and boxes to have a minimum ingress protection degree IP55. Each mechanical system component shall be fed with a dedicated circuit breaker. Existing cables feeding the fan coils shall be reconnected to the new panel.

- Install a new cable from the Main Distribution Panel of the building to the new panel in boiler room, including a new autotransformer 230/400V 3P+N. Replace the circuit breaker in the MDP if necessary according to the new loads.

- Install an emergency push button, current trip type, yellow color, complete with the tag

“ventilation shutoff”, to shut down the fan coils (fed from the new panel in boiler room) and the exhaust fans (fed from the main distribution panel); modify also panel MDP as necessary. The new push button shall be located in the office area, in an easily accessible position. In the office area new cables shall be routed inside rigid insulating conduits over false ceiling and in encased flexible conduits under false ceiling: restore masonry, plaster and painting after the trench; where the false ceiling cannot be open, cables will be routed inside cable raceways mounted at wall.

Control system bldg 901

Install a new Direct Digit Control (DDC) system controlling and monitoring the new Air

Condition system of the building. The new DDC control systems of the A/C systems of the building shall be suitable to be interfaced with the Utilities Monitoring and Control System of the Base (SIEMENS Desigo – BACnet protocol). Works include also the upgrade of the existing software and hardware of the Utilities Monitoring and Control System as necessary

(including, but not limited to, integration of license, upgrade of graphic interface and software engineering)

Transformers, relays, or other electrical accessories of the control system not specifically indicated on the drawing, but necessary for proper operation of the system, shall be provided at no additional cost to the US Government. Control system must be expandable to considering the possible future upgrading of the DDC control system.

The controllers shall be modular type, freely programmable, native BACnet automatic stations with communication via BACnet over Ethernet/IP, BACnet over LongTalk, BACnet PTP (point to point and shall includes interfaces for integrating third party. Each controller shall be equipped with display with characteristics equivalent to SIEMENS PXM20.

The DDC system shall control:

Heat pump: on-off, alarm, Heat pump supply/return pipe temperature

Outdoor probe control

Buffer tank electric resistance and temperature control. During the heating season, between 6 a.m. and 8 p.m., if the outdoor air temperature is below 7º degree and if temperature of the buffer tank is below 30ºC, the electric resistance will heat the water into the buffer tank up to 38 ºC.

Domestic Water meter

The DDC system shall also be interfaced with the electrical power meter to acquire all the electrical measures and electrical energy consumption.

Install new control cables between all the sensors / mechanical equipment and the DDC system installed in the new electrical panel; inside the boiler room and outdoor the new cables shall be routed inside galvanized steel conduits and boxes to have a minimum ingress protection degree IP55. The new DDC system shall be connected to a new communication outlet RJ45, to be installed in the boiler room next to the new electrical panel.

Telecommunication works bldg 901

Telecommunication works shall include (but not necessarily be limited to) the followings:

- Install a new group of 2 RJ45 outlets cat. 6 F/UTP in the boiler room, next to the electrical panel.

- Install 2 new LAN cables cat. 6 F/UTP from the existing communication rack patch panel to the 2 new outlets in the boiler room; inside the boiler room the new cables shall be routed inside galvanized steel conduits and boxes to have a minimum ingress protection degree IP55; in the office area new cables shall be routed inside rigid insulating conduits over false ceiling; where the false ceiling cannot be open, cables will be routed inside cable raceways mounted at wall.

- Install a new communication switch complete with no.24 10/100/1000 ethernet ports, power supply, power cord and IP Base feature set (reference model Cisco WS-C3850-

24U-S or equivalent) inside the communication rack. The communication switch shall be complete with 1 1000BASE-LX-LH SFP transceiver module for MMF and SMF, 1300nm wavelenght, extended operating temperature range and DOM support, dual

LC/PC (reference model Cisco GLC-LH-SMD or equivalent) and shall be complete with a Network Module (reference model Cisco Catalyst 3850 4x1GE or equivalent).

Install 2 new fiber patch cords single mode 9/125 SC-LC to connect the new switch to the existing fiber patch panels; install 2 new LAN patch cords cat. 6 F/UTP to patch the new communication outlets to the new switch.

4.2. BUILDING 3041

Removals/Demolitions bldg 3041

Works shall include (but not necessarily be limited to):

- Removal and disposal of the existing chiller unit. Removal includes also pipes on sight outdoor, valves and accessories, while the buried pipe up to the mechanical room will remain in place.

- Removal of the existing fuel oil boiler including its burner, chimney, circulation pumps, open type expansion vessel and all the accessories into the mechanical room.

The boiler base is not required to be removed.

- Removal of all the heating and cooling pipes into the mechanical room, while the distribution pipes inside the building will be left in place to be reused.

- Removal of the fuel tank. The tank shall be emptied, cleaned and disposed in accordance with the technical specification and all applicable environmental criteria.

Removal of the canopy and the concreate basement and restoration of the area including lawn sowing.

- Cleaning of the underground fuel oil pipes with suitable product to eliminate all the fuel oil and its waste. After the perfect cleaning, pipes will be tested to verify their tightness. In case of test failing, Contractor shall advise the COR that will take all actions required to further analysis, that are not included in this contract.

- Removal of the domestic water pipe that fill the system.

- Removal of 5 fan coils floor mounted. Removal includes the sectional valves, the three way valves

- Removal of 2 fan coils duct mounted in the bay and their outdoor air inlet ducts.

Removal of the control panels.

- Removal of 2 radiators.

- Removal of all the electrical system in the boiler room. Cables feeding the loads in the building outside the boiler room shall not be removed.

- Removal of the outdoor cables, boxes and circuit breakers connecting the existing chiller; the existing chiller is fed from the Main distribution panel.

- Removal of the feeding cable between the Main Distribution Panel and the Boiler room

Panel.

Architectural/Civil/Structural works bldg 3041

- Restoration and painting of walls parts inside the mechanical room damaged by the removing of the pipes and equipment. The basement of the boiler will be left in place

- Closing of the hole of the chimney in the roof of the boiler room, including the necessary repairing of the waterproof membranes.

- Installation of a new cable duct from the boiler room to the new heat pump; restoration of the walkway and of the green area as per the original conditions.

Mechanical works bldg 3041

- Cleaning of the existing pipes that will remain in place. Cleaning shall be done with products suitable to guarantee the removing of debris, mud or other dirty and the pipe protection. Cleaning shall be done before the installation of the new equipment.

- New air to water heat pump (HP), low noise, Eurovent certified, sized to cover the heating/cooling loads of the building considering this working condition:

Summer: outdoor air 34º, r.h.=50%, water: 7/12 ºC, indoor air: 25 ºC

Winter: outdoor air -2º, r.h = 50%, water: 45/40 ºC, indoor air: 20ºC

Sizing shall include also a ventilation flow rate in accordance with the more restrictive values between US an Italian regulation. As indicative value can be considered an occupation of 11 persons.

At a minimum a safety factor of 15% in winter and 15% in summer shall be adopted.

If the calculated cooling capacity of the proposed heat pump were lower than the existing chiller unit, designer shall provide a strong justification for the system resizing.

In particular the heat pump shall be selected to have the required heating capacity at a temperature of -2ºC, correcting the heating capacity values given by the manufactured that are referred to a working temperature of 7 ºC.

In any case the HP shall not have efficiency at nominal condition less than: COP= 3.15, EER: 2.8.

The new HP shall be installed in place of the existing one and shall be selected to guarantee the proper maintenance space, adapting the existing basement and its fence to the new dimensions if necessary.

The HP shall be equipped with RS485 schedule to be interfaced with the DDC system.

The new HP shall be connected outdoor the building through new pipes to the existing buried pipes.

- On each supply/return pipe outside the building shall be installed: n.1 flexible joint, n.1 sectional valve, n.1 air vent, n.1 discharge device, n.1 thermometer and n.1 manometer.

Pipes shall be insulated in accordance with DPR 412/93 class 100%, covered with aluminum sheet.

- A dirty separator with magnet filter properly sized shall be installed on return pipe to protect the HP.

- two circulation pumps (one spare) with efficiency in accordance with ErP ready regulation. Pump flow shall be as indicated by the heat pump manufacturer, the head as per the calculated loss of the primary circuit with the new equipment. Each pump shall be equipped with 2 anti-vibrating joints, two valves, two manometers. Pumps shall be installed into the mechanical room and shall be directly controlled by the heat pump.

- New pipes to connect the buried pipe entering the mechanical room with the new equipment up to the points of connection with the existing pipes. Pipes shall be equipped with valves, air vents devices, discharge devices, thermometers and manometers and all other necessary accessories. Pipes shall be insulated in accordance with DPR 412/93 class 100%, covered with aluminum sheet

- New buffer tank, capacity 10 liter/ kW cooling capacity, placed into the mechanical room, installed on the supply pipe. The puffer tank shall be equipped with sectional valves, expansion vessel, air vent and point of discharge to permit the complete emptying for tank cleaning. Tank shall be ErP ready certified, energy efficiency class no less than C. The buffer tank shall be equipped with an electric coil of 3 kW that will work only during low outdoor air temperatures.

- New domestic water pipe to feed the A/C system with sectional valve, a back flow preventer, an automatic filling valve and a sectional valve. Install a new drainage pipe to convey the discharges of the back flow preventer out to the building.

- n. 5 new fan coils floor mounted. The heating and cooling capacity (calculated at the medium speed) of the new fan coils shall not be less that the existing ones. Fan coils shall have DC fan (0-100% speed control) and shall be equipped with three way valves with insulation and a control panel on board of each fan coil. Each control panel shall permit the temperature control but limited to +/- 2ºC from the set point (20ºC in winter and 26ºC in summer), on/off, speed control (0-automatic-manual), air probe and water probe to turn off the fan coil when the temperature is below the working condition and do the automatic summer/winter changeover.

- N.2 exposed duct mounted fan coil. The heating and cooling capacity (calculated at the medium speed) of the new fan coils shall not be less that the existing ones. Fan coils shall have DC fan (0-100% speed control) and shall be equipped with three way valves with insulation and a control panel on board of each fan coil. Each control panel shall permit the temperature control but limited to +/- 2ºC from the set point (20ºC in winter and 26ºC in summer), on/off, speed control (0-automatic-manual), air probe and water probe to turn off the fan coil when the temperature is below the working condition and do the automatic summer/winter changeover. The control panel (one per fan coil), wall mounted, shall be installed at 1.5 m height in a position where the probe can guarantee a correct temperature reading in the room.

- Cleaning of the existing condensate drainage pipes

- Cleaning of the existing external air grilles and inlet ducts

- Installation of two radiators in place of the removed ones, including new supports if necessary, pipes modification and wall restoration. New radiators shall be sized to have the same heating capacity of the existing ones, considering a temperature of

Electrical works bldg 3041

- Disconnect the electrical feeding of the fan coils to be removed

- Reconnect the existing cables to the new fan coils, installing if necessary new conductors to feed the three-ways valves and the local control panels.

- Install a new ordinary and emergency lighting system in the boiler room. New lighting fixtures shall be LED type.

- Install new power outlets in the boiler room:

o an industrial power outlet (CEE type) 16A 230V 2P+G, IP55 as minimum o an industrial power outlet (CEE type) 16A 400V 3P+G, IP55 as minimum o a civil power outlet (P40 type) 10/16A 230V 2P+G, IP55 as minimum

- Provide the electrical feeding of all the mechanical system equipment (the new and the existing left in place, if any).

- Install a new electrical panel IP55 in the boiler room, feeding:

o the new mechanical system equipment (resistance of the puffer tank included) and the existing mechanical system equipment left in place, if any;

o the new lighting system of the room;

o the new power outlets of the room.

o the new DDC (Direct Digital Control) system, control panel included;

The new panel shall be complete with:

o Voltage presence spy-lights (for each phase);

o a Surge Protection Device, coordinated with the SPD installed in the Main

Distribution Panel (if present);

o a Digital Electrical Power Meter measuring the electrical consumption of the mechanical system; the power meter shall be interfaced with the new DDC system;

o A couple of spy-lights for each pump (green and red) indicating the status of operation;

o A Selector Manual/0/Automatic for each mechanical equipment (pumps, heat pump, fan coils etc.) to bypass the DDC and allow a manual control of the entire system in case of DDC’s fault.

New electrical system shall be 400V TN-S type; inside the boiler room the new cables shall be routed inside galvanized steel conduits and boxes to have a minimum ingress protection degree IP55. Each mechanical system component shall be fed with a dedicated circuit breaker. The new heat pump, formerly fed by the Main distribution panel, shall be fed by the new boiler room panel. Existing cables feeding the fan coils and the existing mechanical equipment left in place outside the boiler room, if present, shall be reconnected to the new panel.

- Install a new cable from the Main Distribution Panel of the building to the new panel in boiler room. Replace the circuit breaker in the MDP if necessary according to the new loads.

- Install an emergency push button, current trip type, yellow color, complete with the tag

“ventilation shutoff”, to shut down the fan coils and the ventilation/exhaust system;

modify also the panel MDP if necessary. The new push button shall be located in the hallway, in an easily accessible position. In the administrative area new cables shall be routed inside rigid insulating conduits over false ceiling and in encased flexible conduits under false ceiling: restore masonry, plaster and painting after the trench.

Control system bldg 3041

Condition system of the building. The new DDC control systems of the A/C systems of the building shall be suitable to be interfaced with the Utilities Monitoring and Control System of the Base (SIEMENS Desigo – BACnet protocol). Works include also the upgrade of the existing software and hardware of the Utilities Monitoring and Control System as necessary

(including, but not limited to, integration of license, upgrade of graphic interface and software engineering)

Transformers, relays, or other electrical accessories of the control system not specifically indicated on the drawing, but necessary for proper operation of the system, shall be provided at no additional cost to the US Government. Control system must be expandable to considering the possible future upgrading of the DDC control system.

The controllers shall be modular type, freely programmable, native BACnet automatic stations with communication via BACnet over Ethernet/IP, BACnet over LongTalk, BACnet PTP (point to point and shall includes interfaces for integrating third party. Each controller shall be equipped with display with characteristics equivalent to SIEMENS PXM20.

The DDC system shall control:

Heat pump: through the RS 485 interface (on-off, summer/winter changeover, alarm, supply/return temperature), Outdoor probe control

Buffer tank electric resistance and temperature control. During the heating season, between 6 a.m. and 8 p.m., if the outdoor air temperature is below 7º degree and if temperature of the buffer tank is below 30ºC, the electric resistance will heat the water into the buffer tank up to 38 ºC.

The DDC system shall also be interfaced with the electrical power meter to acquire all the electrical measures and electrical energy consumption.

Install new control cables between all the sensors / mechanical equipment and the DDC system installed in the new electrical panel; inside the boiler room and outdoor the new cables shall be routed inside galvanized steel conduits and boxes to have a minimum ingress protection degree IP55; from the boiler room to the new heat pump the control cables shall run into the buried cable duct. The new DDC system shall be connected to a new communication outlet

RJ45, to be installed in the boiler room next to the new electrical panel.

Telecommunication works bldg 3041

- Install a new group of 2 RJ45 outlets cat. 6 F/UTP in the boiler room, next to the electrical panel.

- Install 2 new LAN cables cat. 6 F/UTP from the existing communication rack patch panel to the 2 new outlets in the boiler room; inside the boiler room the new cables shall be routed inside galvanized steel conduits and boxes to have a minimum ingress protection degree IP55; in the office area new cables shall be routed inside rigid insulating conduits over false ceiling; where the false ceiling cannot be open, cables will be routed inside cable raceways mounted at wall.

- Install a new communication switch complete with no.24 10/100/1000 ethernet ports, power supply, power cord and IP Base feature set (reference model Cisco WS-C3850-

24U-S or equivalent) inside the communication rack. The communication switch shall be complete with 1 1000BASE-LX-LH SFP transceiver module for MMF and SMF, 1300nm wavelenght, extended operating temperature range and DOM support, dual

LC/PC (reference model Cisco GLC-LH-SMD or equivalent) and shall be complete with a Network Module (reference model Cisco Catalyst 3850 4x1GE or equivalent).

Install 2 new fiber patch cords single mode 9/125 SC-LC to connect the new switch to

4.3. BUILDING 3050

Removals/Demolitions bldg 3050

Works shall include (but not necessarily be limited to):

- Removal and disposal of the existing chiller unit equipped with buffer tank and pumps.

Removal includes also pipes on sight outdoor, valves and accessories, while the buried pipe from the chiller up to the mechanical room will remain in place.

- Removal of the existing fuel oil boiler including: burner, chimney and its concrete base, circulation pumps, open type expansion vessel and all the accessories into the mechanical room. The base of the boiler is not required be removed.

- Removal of all the heating pipes into the mechanical room, while the cooling pipes inside the boiler room shall be modified to be compatible with the new condition.

- Removal of the underground fuel tank and its concrete structure. The fuel tank shall be emptied, cleaned and disposed in accordance with the technical specification and environmental criteria. Restoration of the area.

- Cleaning of the underground fuel oil pipes with suitable product to eliminate all the fuel oil and its waste. After the perfect cleaning, pipes will be tested to verify their tightness. In case of test failing, Contractor shall advise the COR that will take all actions required to further analysis, that are not included in this contract.

- Disconnection of the domestic water pipe that fills the system.

- Removal of 5 fan coils floor mounted. Removal includes the sectional valve, the three way valve

- Removal of 6 fan coils duct mounted in the bay and their outdoor air inlet ducts.

Removal of the control panels.

- Removal of 2 radiators.

- Removal of all the electrical system in the boiler room. Cables feeding the loads in the building outside the boiler room shall not be removed.

- Removal of the outdoor cables, boxes and circuit breakers connecting the existing chiller.

Architectural/Structural works bldg 3050

- Restoration and painting of walls parts inside the mechanical room damaged by the removing of the pipes and equipment. The basement of the boiler will be left in place

- Closing of the chimney hole in the wall and painting

Mechanical works bldg 3050

- Cleaning of the existing pipes that will remain in place. Cleaning shall be done with products suitable to guarantee the removing of debris, mud or other dirty and the pipe protection. Cleaning shall be done before the installation of the new equipment.

- New air to water heat pump (HP), low noise, Eurovent certified, sized to cover the heating/cooling loads of the building considering this working condition:

Summer: air 34º, r.h.=50%, water: 7/12 ºC, indoor air: 25 ºC

Winter; air -2º, r.h = 50%, water: 45/40 ºC, indoor air: 20 ºC

Sizing shall include also a ventilation flow rate in accordance with the more restrictive values between US an Italian regulation. As indicative value can be considered an occupation of 15 persons.

At a minimum a safety factor of 15% in winter and 15% in summer shall be adopted.

If the calculated cooling capacity of the proposed heat pump were lower than the existing chiller unit, designer shall provide a strong justification for the system resizing.

In particular the heat pump shall be selected to have the required heating capacity at a temperature of -2ºC, correcting the values given by the manufactured that are referred to a working temperature of 7 ºC.

The new HP shall be installed in place of the existing one and shall be selected to guarantee the proper maintenance space.

In any case the HP shall not have efficiency at nominal condition less than: COP= 3.15, EER: 2.8.

The HP shall be equipped with RS485 schedule to be interfaced with the DDC system.

- The new HP shall be connected outdoor the building through new pipes to the existing buried pipes, including new anti-vibrating joints, valves, air vent devices, manometers, thermometers. Pipes shall be insulated in accordance with DPR 412/93 class 100%, covered with aluminum sheet

- A dirty separator with magnet filter properly sized shall be installed on return pipe to protect the HP.

- N.2 new circulation pumps (one spare) with efficiency in accordance with ErP ready regulation. Pump flow shall be as indicated by the heat pump manufacturer, the head as per the calculated loss of the primary circuit with the new equipment. The pumps shall be directly controlled by the heat pump’s control panel. Each pump shall be equipped with 2 anti-vibrating joints, two valves, and two manometers. Pumps shall be installed into the mechanical room and shall be directly controlled by the heat pump

- New pipes to connect the buried pipe entering the mechanical room with the new equipment up to the points of connection with the existing pipes. Pipes shall be equipped with valves, air vents devices, discharge devices, thermometers and manometers and all other necessary accessories. Pipes shall be insulated in accordance with DPR 412/93 class 100%, covered with aluminum sheet

- New buffer tank, capacity 10 liter/ kW cooling capacity, placed into the mechanical room, installed on the supply pipe. The puffer tank shall be equipped with sectional valves, expansion vessel, air vent and point of discharge to permit the complete emptying for tank cleaning. Tank shall be ErP ready certified, energy efficiency class no less than C. The buffer tank will works as hydraulic separator between the primary circuit and the secondary circuit. The buffer tank shall be equipped with an electric coil of 3 kW that will work only during low outdoor air temperatures.

- N.2 new circulation pumps (one spare) with efficiency in accordance with ErP ready regulation. Pump flow shall be as per the need of the building, the head as per the calculated loss of the secondary circuit. The pumps shall be controlled by the DDC system. Each pump shall be equipped with 2 anti-vibrating joints, two valves, and two manometers.

- New domestic water pipe to feed the A/C system with sectional valve, a back flow preventer, an automatic filling valve and a sectional valve. Install a new drainage pipe to convey the discharges of the back flow preventer out to the building.

- N. 5 new fan coils floor mounted. The heating and cooling capacity (calculated at the medium speed) of the new fan coils shall not be less that the existing ones. Fan coils shall have DC fan (0-100% speed control) and shall be equipped with three way valves with insulation and a control panel on board of each fan coil. Each control panel shall permit the temperature control but limited to +/- 2ºC from the set point (20ºC in winter and 26ºC in summer), on/off, speed control (0-automatic-manual), air probe and water probe to turn off the fan coil when the temperature is below the working condition and do the automatic summer/winter changeover.

- N. 6 new exposed duct mounted fan coils. The heating and cooling capacity (calculated at the medium speed) of the new fan coils shall not be less that the existing ones. Fan coils shall have DC fan (0-100% speed control) and shall be equipped with three way valves with insulation and a control panel on board of each fan coil. Each control panel shall permit the temperature control but limited to +/- 2ºC from the set point (20ºC in winter and 26ºC in summer), on/off, speed control (0-automatic-manual), air probe and water probe to turn off the fan coil when the temperature is below the working condition and do the automatic summer/winter changeover. The control panel (one per fan coil), wall mounted, shall be installed at 1.5 m height in a position where the probe can guarantee a correct temperature reading in the room

- Cleaning of the existing external air grilles and inlet ducts

- Installation of two radiators in place of the removed ones, including new supports if necessary, pipes modification and wall restoration. New radiators shall be sized to have the same heating capacity of the existing ones, considering a temperature of

Electrical works bldg 3050

- Disconnect the electrical feeding of the fan coils to be removed

- Reconnect the existing cables to the new fan coils, installing if necessary new conductors to feed the three-ways valves and the local control panels.

- Install a new ordinary and emergency lighting system in the boiler room. New lighting fixtures shall be LED type.

- Install new power outlets in the boiler room:

o an industrial power outlet (CEE type) 16A 230V 2P+G, IP55 as minimum o an industrial power outlet (CEE type) 16A 400V 3P+G, IP55 as minimum o a civil power outlet (P40 type) 10/16A 230V 2P+G, IP55 as minimum

- Provide the electrical feeding of all the mechanical system equipment (the new and the existing left in place, if any).

- Install a new electrical panel IP55 in the boiler room, feeding:

o the new mechanical system equipment (resistance of the puffer tank included) and the existing mechanical system equipment left in place, if any;

o the new lighting system of the room;

o the new power outlets of the room.

o the new DDC (Direct Digital Control) system, control panel included;

The new panel shall be complete with:

o Voltage presence spy-lights (for each phase);

o a Surge Protection Device, coordinated with the SPD installed in the Main

Distribution Panel (if present);

o a Digital Electrical Power Meter measuring the electrical consumption of the mechanical system; the power meter shall be interfaced with the new DDC system;

o A couple of spy-lights for each pump (green and red) indicating the status of operation;

o A Selector Manual/0/Automatic for each mechanical equipment (pumps, heat pump, fan coils etc.) to bypass the DDC and allow a manual control of the entire system in case of DDC’s fault.

New electrical system shall be 400V TN-S type; inside the boiler room the new cables shall be routed inside galvanized steel conduits and boxes to have a minimum ingress protection degree IP55. Each mechanical system component shall be fed with a dedicated circuit breaker. Existing cables feeding the fan coils and the existing mechanical equipment left in place outside the boiler room, if present, shall be reconnected to the new panel.

- Install an emergency push button, current trip type, yellow color, complete with the tag

“ventilation shutoff”, to shut down the fan coils and the ventilation/exhaust system;

modify also the panel MDP if necessary. The new push button shall be located in the hallway, in an easily accessible position. In the administrative area new cables shall be routed inside rigid insulating conduits over false ceiling and in encased flexible conduits under false ceiling: restore masonry, plaster and painting after the trench.

Control system bldg 3050

Condition system of the building. The new DDC control systems of the A/C systems of the building shall be suitable to be interfaced with the Utilities Monitoring and Control System of the Base (SIEMENS Desigo – BACnet protocol). Works include also the upgrade of the existing software and hardware of the Utilities Monitoring and Control System as necessary

(including, but not limited to, integration of license, upgrade of graphic interface and software engineering)

Transformers, relays, or other electrical accessories of the control system not specifically indicated on the drawing, but necessary for proper operation of the system, shall be provided at no additional cost to the US Government. Control system must be expandable to considering the possible future upgrading of the DDC control system.

The controllers shall be modular type, freely programmable, native BACnet automatic stations with communication via BACnet over Ethernet/IP, BACnet over LongTalk, BACnet PTP (point to point and shall includes interfaces for integrating third party. Each controller shall be equipped with display with characteristics equivalent to SIEMENS PXM20.

The DDC system shall control:

Heat pump: through the RS 485 interface (on-off, summer/winter changeover, alarm, supply/return temperature)

Secondary circuit circulating pumps : on-off, alarm

Outdoor probe control

Buffer tank electric resistance and temperature control. During the heating season, between 6 a.m. and 8 p.m., if the outdoor air temperature is below 7º degree and if temperature of the buffer tank is below 30ºC, the electric…