J.1.8_HVAC_Installations.pdf

A-E_SERVICES_CMR_ DEMOLITION_&_CONSTRUCTION_ SITE_CONSERVATION

SARAJEVO, BOSNIA&HERZEGOVINA

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Book 4

Part 5 MECHANICAL INSTALLATIONS

4.6.1 Technical description

4.6.2 Bill of Quantities

4.6.3 Drawing

M-001

M-001 EXISTING SITE PLAN MECHANICAL INSTALLATION 1:1000

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4.6.1 TECHNICAL DESCRIPTION

This design refers to demolition works of mechanical installations at the “ Chief of Mission Residence CMR Sarajevo”.

GENERAL

Mechanical installation in existing building originally consists of central heating system with its own boiler room and hot water system for heating with radiators. As the building changes its purpose and internal space organisation, some local air conditioning systems have been added and installed.

BOILER ROOM

The boiler room is in ground floor of the building and use the fuel oil. There is one hot water boiler with fuel oil burner and all necessary equipment as circulating pumps, closed expansion vessel, headers, regulating three-way valve, steel pipes, water softener and chimney.

All mentioned and installed equipment is older more than 25 years. Complete installation is out of use for a long period of time.

Having in mind the age and current condition, it is reasonable to conclude that all equipment has no use value.

Picture 1. Boiler room

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Boiler room has been supplied by fuel oil from the underground fuel storage with total capacity of 22.7 m3. Fuel storage is located on the north side of compound and connected by underground return and supply oil line to the boiler room. Oil lines are installed in 150 mm conduit.

CENTRAL HEATING SYSTEM

Central heating system consists of main steel pipes network installed under the ceiling of ground floor and in the slabs and walls. Some relatively new reconstructions of horizontal networks are visible and made of cupper pipes installed above the floors and along the walls.

Generally, two types of radiators are installed within the building, cast iron radiators, mainly on the ground floor, and aluminium radiators on the first and second floor.

Radiator batteries consist of up to 20 segments and significant amount of them is already dismantled from wall hangers and supports.

Having in mind that complete installation is out of water for a long period of time, steel pipes and cast-iron radiators are probably heavily damaged by corrosion and have no use value. Beside that, there was possibility of water freezing during the winter period that could seriosly damaged aluminium radiators. In that case neither aluminium radiator would have any use value.

Picture 2. Existing radiators

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AIR CONDITIONG SYSTEMS

Air conditioning systems consists of split systems installed under the ceilings on the first and second floor as well as in guards’ facilities. This quipment is in relatively good condition. Some indoor units are with flexible ducts and connected with air diffusers in different rooms. Ducting work and air diffusers are in bad condition.

Picture 3. Uderceilng indoor AHU and air diffuser

NATURALE GAS COMPOUND CONECTION

There is natural gas compound connection on the south side, in the front of the building, direction Alipasina street. On the existing site plan drawings there is the PE gas pipeline diameter 63 mm in total length of 45 m. There is also the pressure regulation station.

Natural gas has not been used in existing boiler room because of boiler room location which is not in accordance to technical norms.

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DEMOLITION WORKS

Demolition works include all necessary works on removal of existing outside and inside mechanical installations. Outside installation includes fuel oil and natural gas installations.

Inside works refer to dismantling and demolition of boiler room as well as entire steel and coper pipeline installations and radiators. Inside demolition works also include dismantling of all air handling units with its ducting work and diffusers.

In accordance with previously stated opinion some of aluminium radiators as well as air conditioning systems have some value and should not be removed to the dump site.

NOTE: We didn't have any data about tank type that is installed and way that is installed. We presumed that is laid down on the concrete slab and strapped to it and afterwards covered with soil.

When removal start, we will know in what condition is the tank and is there any soil contamination around it. If so, all surrounding soil will be excavated, tested for contamination and changed with new soil.

During the excavation all soil samples and photographs will be provided.

Main designer :

Mr. Sc. Kenan Ceric dipl. ing. mas

COMMENTS AND ANSWERS

Comment status ID: 954938

Answer: The use of natural gas in new boiler room is envisaged by new mechanical project.

Reason for dismantling and removal of existing natural gas pipeline, as well as gas regulation station, is safety measure during construction. It would be very dangerous to have natural gas pipeline and gas regulation station under the pressure in the middle of construction site with a plenty of heavy machinery, trucks, and all kind of workers.

Revised Oct 18 2021.

Comment status ID: 956972

Answer: Enclosed drawings P-01,02,03 in Book 4 - Part 5 "Mechanical" are canceled and replaced with new drawing M-001

Revised Oct 18 2021

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Comment status ID: 956987 replaced with new drawing M-001.

Comment status ID: 956988

Answer: Enclosed drawings P-01,02,03 in Book 4 - Part 5 "Mechanical" are canceled and

Comment status ID: 956989

Comment status ID: 956990 replaced with new drawing M-001

Comment status ID: 957142

Answer: Enclosed drawings P-01,02,03 in Book 4 - Part 5 "Mechanical" are canceled and

Comment status ID: 954938 rev2 comment open

Answer: Intention is to remove the natural gas pipeline and gas regulation station only during construction.

Backcheck Recommendation Open Comment Please clarify, is it your intention to remove natural gas from the residence permanently, or only during construction?

Submitted By: Frank Luciani (703-875-6113) Submitted On: Oct 22 2021 mailto:Lucianifs@state.gov

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4.6.2_ BILL OF QUANTITIES

No. Descritpion Meas.

Unit Quantity Unit price Total

A DEMOLITION WORKS

1.0. OUTSIDE THE BUILDING

1.1. Excavation and taking out of the trench the

existing underground fuel oil tank volume 22 m3. Loading it on the track and disposal on a location according to investor request.

Calculate transport up to the 20 km.

pcs. 1 4000 4000

1.2. Excavation and taking out of existing fuel oil

supply and return pipes in conduit Æ150mm.

m' 70 30 2100

1.3. Dismantling of existing remote oil fill box with

fill tank line length 5 m.

pcs. 1 200 200

1.4. Excavation and taking out of the existing

natural gas pipe line, PE Æ63. This works have to be done by approval of KJKP SARAJEVOGAS and after closing of gas connection and venting out of the pipe.

m'. 45 30 1350

1.5. Dismantling and removal of existing gas

regulation station with connection gas pipe length up to 10 m and relocation of new position. This works have to be done by approval of KJKP SARAJEVOGAS and after closing of gas connection and venting out of all pipes.

pcs. 1 3000 3000

1.6. Dismantling and closing the existing connection

on natural gas distribution network. This works have to be done by approval of KJKP SARAJEVOGAS and according to technical documentation.

pcs. 1 2000 2000

1.0. TOTAL DEMOLITION WORKS OUTSIDE THE BUILDING 12650

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A DEMOLITION WORKS

2.0. INSIDE THE BUILDING

These works include dismantling, removal, loading on the track and disposal on location according to investor request. Calculate transport distance up to the 20 km. All necessary anciliary works, tools and other services have to be included.

2.1. Oil fired steel hot water boiler, nominal power

Q=180 kW pcs. 1 1500 1500

2.2. Oil fuel burner, Weishaupt, model WL 30/1-C

ZM, heat load Q= 194 kW, Burner is equipped with oil filter, ball valves and houses and electrical switch board.

pcs. 1 200 200

2.3. Hot water circulation pump pcs. 2 100 200

2.4. Three-way valve, with actuator pcs. 1 50 50

2.5. Closed expansion vessel, for hot water, useful

volume V = 80 l pcs. 1 70 70

2.6. Water softener, capacity Q=0.5 - 1 m3/h pcs. 1 150 150

2.7. Hot water headers, made of steel seamless

pipe dimension Ø 108 x 3,6 , length up to 1200 mm, with connections pcs. 2 100 200

2.8. Cast iron radiators, batteries up to 25

segments, height 300 mm, installed on ground floor. All wall/floor accessories included.

pcs. 35 20 700

2.9. Aluminium radiators, batteries up to 20

segments, height 600 mm, installed on first and second floor. All wall/floor accessories included.

pcs. 45 15 675

2.8. Visible Steel seamless pipes, installed as

vertical and horizontal pipeline network, dimensions up to DN 50, max total length up to 600 m. All wall/floor accessories included.

lump sum 500

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2.9. Visible coper pipes in PE insulation, installed

above the floors and along the walls, dimensions up to 16 mm, max total length up to 300 m. All wall/floor accessories included.

lump sum 300

2.10. Air conditioning systems, inside units installed

under the ceiling of second floor. Unit capacity up to 15 kW. Outside units installed on the roof are included. This item also includes flexible ducting works and air diffusers where installed pcs. 8 500 4000

2.0 TOTAL DEMOLITION WORKS INSIDE THE BUILDING 8245

RECAPITULATION

1.0. TOTAL DEMOLITION WORKS OUTSIDE THE BUILDING 12650

2.0 TOTAL DEMOLITION WORKS INSIDE THE BUILDING 8245

TOTAL ALL 20895

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4.6.3 DRAWINGS

M-001 EXISTING SITE PLAN MECHANICAL INSTALLATION

N

WC

R z

V l a d a

F e d e r a c i j e

B i

H

U l

A l i p a s i n a

G

WC

Vodena pumpa

Tisa-Yew

Smrca-Spruce

Tisa-Yew

S

S

S

S

R2

R1

(549.1794)

(551.3712)

N

R e s i d e n t a l b u i l d i n g

G o v e r n m e n t

R e s i d e n c e b u i l d i n g

R e s i d e n t a l b u i l d i n g

PEDESTRIAN ENTRANCE TO REMAIN

EXISTING CAC TO REMAIN

NO INTERVENTION ON

EXISTING ENTRANCES

NO INTERVENTION ON

EXISTING ENTRANCES

NO INTERVENTION ON

EXISTING ENTRANCES

NOTE: We didn't have any data about tank type that is installed and way that is installed. We presumed that is laid down on the concrete slab and strapped to it and afterwards covered with soil.

When removal start, we will know in what condition is the tank and is there any soil contamination around it. If so, all surrounding soil will be excavated, tested for contamination and changed with new soil.

During the excavation all soil samples and photographs will be provided.

EXISTING STEEL GAS

SERVICE LINE 51mm (2")

GAS CONNECTION TO BE CLOSED

G

G

G

EXISTING PLASTIC GAS

SERVICE LINE 62 mm (2-1/2")

AND GAS REGULATING

STATION TO BE REMOVED

FUEL OL SUPPLY &RETURN

PIPING RUN IN 150mm CONDUIT

TO BE REMOVED

EXISTING 22.7 m3 (6.000 GAL)

UNDERGROUND FUEL

STORGE TANK TO BE REMOVED

75 mm FILL LINE

TO BE REMOVED

REMOTE FILL BOX

TO BE REMOVED

Phase

Project Number

(Seal)

Classification

Checked By

Drawn By

CADD File Name

OBO Project Number

CADD Plot Scale

Date

Drawing Scale

Number

35%CONCEPT

Sheet

60% 100%90% FINAL

Release For Construction:

Drawing Title

OBO/PDCS/PDC OBO/PDCS/DE

DescriptionRev Number

Revisions

Date

CAD_NAME

PROJ_NO

PNUM

OVERSEAS BUILDINGS OPERATIONS

United States Department of State

Washington, D.C.

KENEN_CERIC,DIM

30/07/2022

BIBERKIC_FADIL,DIG

SENSITIVE_BUT_UNCLASSIFIED(SBU)

1:100

1:1000

SARAJEVO

projektovanje, inžinjering, konsalting Srđana Aleksića 14 tel/fax: 033 213 840

FABING d.o.o.

Fadil BiberkićPrincipal

ENERGO DESIGN d.o.o.

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AutoCAD SHX Text WARNING: This document is the property of the U.S. Government. Further reproduction and/or distribution outside the contractor team is prohibited without the express written approval of: U.S. Department of State ATTN: Washington, DC 20520

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BOSNIA&HERZEGOVINA

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DEMOLITION_&_CONSTRUCTION_

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A-E_SERVICES_CMR_

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EXISTING

AutoCAD SHX Text M_001

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SITE_PLAN

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SITE_CONSERVATION

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MECHANICAL_INSTALLATION