Project: Replacing AC System in a Commercial Building

This project focuses on the replacement of an air conditioning system in a 20-storey commercial building. The project includes an executive summary outlining the need for replacement due to the inefficiency of the existing system, impacting the working environment. The proposal details the planning group's roles, activities, and meeting records, including responsibilities and discussion plans. Specifications and constraints are defined, covering project title, brief descriptions, and scope of work, emphasizing the need for high-quality space and advanced technical systems. The project involves removing the old system, installing a new one, and conducting testing and commissioning, with warranty considerations. Design requirements, including matching components and obtaining approvals, are also specified. The proposal highlights the importance of replacing the system to improve cooling efficiency and reduce electricity consumption, ultimately enhancing the working environment in the commercial building. The project also emphasizes the need for a detailed plan, considering factors like company structure, risk management, and legal requirements, to ensure the successful implementation of the new air conditioning system.

Replace air-conditioning
system in 20 storey
commercial building.

Table of Contents
EXECUTIVE SUMMARY.............................................................................................................1
1.1 Planning group roles and activities ...........................................................................................2
1.2 Specifications and Constraints of the project ............................................................................3
1.3 Formulate proposal...........................................................................................................1
2.1 Document evidences.........................................................................................................1
2.2 Final proposal meeting the specifications........................................................................2
3.1 Evaluate recommendation...............................................................................................7
APPENDIX....................................................................................................................................10

EXECUTIVE SUMMARY
Project Summary :-
The current project is about the replacement of air conditioning system in 20 storey
commercial building. Regarding the topic of the project, three proposals have been formulated
among which the most appropriate one was contractor. With an inefficient air conditioning
system the people in the commercial building have to face problems in their way of working.
Background :-
Effective cooperation was obtained from the private organisations and consultation of
certain government authorities were also there. The entire process in which the research was
conducted, proved to be highly compatible in meeting the overall aim of the project.
Process :-
The information was collected from very authentic sources so that the information
acquired could be analysed in an effective manner.
Findings & Conclusion ;-
From the findings of the project, it can be concluded that old air conditioning systems
need to be replaced otherwise they might create problems for the individuals working there. So,
manager of the commercial building need to immediately take in consideration contractors for
replacing the system.
Recommendation & further action :-
From the overall project, it can be concluded that for replacement of air conditioning
system in the commercial 20 storey building, contractor would be highly beneficial.
Furthermore, the contractor's role would be to consistently monitor the air conditioning system
so that is any errors are found, they could be assessed on time.
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1.1 Planning group roles and activities
Member involved in project : Mao_Tse-tung, Sun_Wen, Zhao_Dao
Group-Meeting :-
Date : 20 Aug 2017
Time : 12:00
Place : TBA
Content of meeting :-
It is important that all the data and information related with the project should be
performed properly so that the entire project for replacing the air conditioning should be carried
out successfully. Adding more to this, discussions would also be made upon keeping in mind the
environment of Won Chai building where the AC replacement has to take place. Meetings will
be organised and discussions will be made with the staff members so that required data and
information should be completed in proper way. Further all the important points of the
discussions will be noted down and they will be properly recorded so that the while carrying out
the project it can be used in effective way. Each and individual member will be assigned specific
job roles and they will be directed for completing their assigned work so that air conditioning
system could be replaced without facing many difficulties. There are different activities which
will be delegated to the team members according to their skills. This will help in completing the
task on time and in the effective manner. Along with this team member will be support each
other in their tough task so that any individual not face any difficulty in completing the task.
New ideas and view of group member will be shared in meeting so that new ideas can be get for
completing the entire project.
Meeting's records :-
1. Architecture of the group :-
Initially the entire group will be divided into the group of 3 or 4 members and a person
will be declared as a team leader.
Leader of team : Mao_Tse-tung
Members : Sun_Wen
Keeper of records : Zhao_Dao
2. Responsibilities :-
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Team leader will be asked to lead the team and the person will be made accountable for
holding and organizing meetings with the other team members. In addition to that the leader will
be directing the team and on the basis of that all the activities and tasks of the team will be
performed. A record keeper will be assigned to the work for carrying out discussion in the team
(Tian, Cai and Liu, 2015.).
3. Plan discussion :-
Background : There is commercial building within Wan Chai of Hong Kong where the
air conditioning systems have been in use for more than 15 long years. This building has been
facing the specific problems of failure in their air conditioning system as a result of which the
need to change the entire system has arisen. As a result the system has become defective thereby
causing problems for people working there. Henceforth, replacement of the air conditioning
system is the prior need of the owners & managers. As result of this, they have requested for
replacement.
Time needed for replacement : 3 months
Budget involved : 9 million
Next schedule of meeting
Date : 20 Nov 2017
Time : 13 :00
Venue : TBA
1.2 Specifications and Constraints of the project
(a) Project Title :- Title of the project is Replacing Air Conditioning system in 20 Storey
Commercial building.
The project of replacing Air Conditioning system in 20 Storey Commercial building at
Wan Chai is taken into consideration. It helps in deep understanding of the project related to
replacing the air conditioner. There are different types of proposal available for replacing the air
conditioner and one among all of them will be selected which is appropriate in respect to
implement at the 20 storey commercial building.
(b) Brief description
New technology is Opening ways for providing better and effective services to various
organizations that are operating. Moreover, many commercial buildings are having Old air
conditioning systems and three exist high need for replacing the existing systems so that air
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conditioning system should be improved (Oruç, Devecioğlu and Vural, 2016.). There is high
demand for high quality space and advanced technical systems so that office could be made
equipped with the advanced technical equipments. Multi-story buildings provide efficient
circulation space, Integration of building services, Column free floor spans and high quality
office space for carrying out business activities. Air conditioning system will be replaced by
properly preparing a detailed plan and on the basis of that plans will be made for carrying out the
replacement of the Air conditioning system used in the entity.
Large commercial buildings which are operating in the country requires a long period of
time for implanting a new system as the space is more under these buildings. Majority of the
Commercial buildings are highly centralized and they contain air conditioning equipments. The
central station system for these buildings is connected with the roof and basement. Both the
points are having advantage in terms of easy utility connections and noise isolation. Earlier in
older commercial buildings mechanical equipments are fitted on the roof and the air systems
were served by a single central handling unit on the roof (Navarro-Esbrí, Mota-Babiloni and
Belman-Flores, 2013.). Air conditioning systems which are fitted in the building requires a to
generate a cooling effect. This effect works for offsetting the building from several types of
internal and external loads.
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Illustration 1: AC system
(Source : How Much Does It Cost To Replace An AC
Compressor?, 2017)

The external pressure and challenges sustained by a building comprise of sun, outdoor
temperature and Wind and internal pressures faced by a building comprise of Heat and Moisture,
light and pressure from other equipments. There are different types of cooling systems that are
used in offices and all the systems are having some advantages and disadvantages. Therefore, it
is important to replace the air conditioner system at 20 storey commercial building so that system
can be improved because of high demand of the high quality space and advanced technical
systems. There different office in commercial building situated which where it is important to
replace the old air conditioning system. So it is decided that at Commercial building all the old
conditioning system will be replaced. For this purpose detailed information will be gather to
identify the best conditioning system and the way to implement it in building. Proper plan will be
made and detailed information will be gathered in respect to successful implementing the new air
conditioning system.
(c) Scope of work
The project helps for designing an improved air conditioning system in which high tech
equipments will be used for replacing the existing air conditioning system in the building. Also,
adding more to this, care also has to be taken care of such that the newly implied systems are not
hindering the comforts of people working in the commercial building of Wan chai. The old
conditioning system is consuming lots of electricity and it is also dangerous because more heat is
produced and it cannot take load of high voltage due to which there are chances of damage can
be take place. This lead to increase in cost while in commercial building it is important to
maintain electricity items and replaced it over a time. Therefore, step is taken to replace the old
air conditioner system with new one which is more effective in term of cooling and consuming
electricity. This initiative will help for saving the cost of electricity and with this working area in
the commercial building will be replaced (Leventis, Shah and McNeil, 2015).
→ Removing the old air conditioning systematic
→ Installation of the new air-conditioning system
→ Dong the testing as well as commissioning of the newly installed air conditioning systems.
→ Warranty period needs to be offered once the installing and testing procedure gets completed
D. Particular specification
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Evidences will be collected for the design of the project and on the basis of that entire air
conditioning replacement system will be executed. Details about company structure chart and
detailed information about the qualification of the personnel should also be determined. In
addition to that a proper management plan will be prepared and details about how the project will
be managed will be determined so that the project should be completed on due time interval
(Zhao and Tan, 2015.). In this it is also required that detailed description about the risk
management plan should be done so that the risk areas associated with the business should be
highlighted. With this legal requirement also needs to be identified so that all the replacing
should be done as per the legal and lawful manner. In addition to that the agency to whom the
contract will be given for replacing the air conditioning system will be identified and they will be
given clear instructions for designing the entire system. Furthermore, contract will be given to
company who will provide high quality services at reasonable price. Gantt chart will be prepared
so that each task can be divided according to its cost and time. By doing this it becomes easy to
identify the critical task and it will be completed first. Proper information of the new
conditioning system will be inspect first in term of its quality, specification, description of the
product so that any damage or any poor quality conditioning system is not implemented.
1. Design requirements:-
The responsibility of appropriately and correctly matching all the constituent components
of the main air conditioning system and also incorporating other installation for ensuring that
installed ones have satisfied all requirements concerning the performances. The architect needs
to be submitted all the relevant and authentic calculations & information for the purpose of
obtaining approval.
2. Air conditioning system:-
2.2.1 General Requirements : The requirements within this particular Section
should be strictly in conformation with all provision concerning contracts with an
inclusion of supplementary_&-general conditions, contract based conditions, and
the basic involved drawings related to the contract.
2.2.2 Scope : Microprocessor controlling system is going to be provided along
with compressor that would be time-screwed. However, they are tend to be
limited towards the manufacturing start-ups, electrical control-&-power
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connections, package of air conditioning system, connections of the chilled water-
supply and last one is charging for the oil and refrigerant connections.
2.2.3 Delivering & Handling : The unit needs to be delivered at the site of job
that too assembled in a full manner. The interconnection concerning piping of
refrigerant as well wiring in internal parts have to be ready in order for field
installation. All the vulnerable components within the air conditioning system
necessary for protecting purpose during installation at field, have to b e covered
by protective-covering. The storing and handling of unit needs to be done as er
the instructions provided the manufacturer.
PART 2 : PRODUCTS
2.2 MANUFACTURERS
A. If the equipment provided by manufacturer is able to satisfy the performance schedule and
also complies with the equipment's specifications then, alternate ones are likely to get accepted.
Inclusion of following elements has to be there : site-noise consideration, structural-support
provided to unit, size of piping particularly header & footer location.
B. The costs which are incurred by general-contractor, consultants and sub-contractors is the
responsibility of mechanical-contractor. This is done to modify provisions of building for
accepting the newly installed air conditioning systems.
C. Specialisation needs to be done from the manufacturer of the equipments within the product's
manufacture & design that have been specified. Minimum experience of 5 years has to be there
for supply of speed-driven technology of suppliers upon the specified refrigerant an equipment
as well.
2.2.1 General :
A. Description : The included chiller should not limited just towards entire system incorporating
independent-circuits, air-cooled condenser lubricating-system.
B. Operating Characteristics : Both low and high ambient type temperature needs to be provided.
The system for capacity-control should be capable of making 10% reduction in the capacity of
unit.
C. Cabinet : Use of painted galvanised-steel needs to be there for constructing the unit-panel,
structural-elements, control-boxes and structural-base of heavy-gauge.
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D. Shipping : Only a single evaporator needs to be provided as inlet and pipe-connection should
be used as an outlet.
2.2 Air Conditioning system
The internal compressors and other equipments used in the air conditioners need to be directly
driving. Appropriate drain and vent fittings have to be provided with ambient off-cycle
temperatures.
2.4 acoustical Data
A. The acoustical sound or either power levels concerning pressure-levels data should be
provided in decibels at certain scheduled frequencies.
B. The load at which pressure levels are provided should be 100%, 70%, 55% and 20%.
C. The sound power that is already scheduled must not be exceeded by any of the supplied
equipment at any point of load.
D. The ratings concerning acoustical-performance ratings have to be in accordance.
2.5 POWER AND ELECTRICAL REQUIREMENTS
A. Power/Control panel : Proper installation of factory has to be done with proper wiring.
Concerning the supply of main-supply, appropriate connections need to be provided. Within the
panel, inclusion of access-door concerning control-display should be there.
B. Single point power : Further, to the chiller connections regarding single-point power should
be there along with connections of terminal-blocks.
C. Control transformer :Also, to provide unit-control voltages, wired-controlled transformer will
be used from the supply of main-unit power.
D. Short Circuit : The rating of the electrical-enclosure concerning the utilised system should lie
in range of → 380,400 & 460V : 30,000.
E. Motor starters : Thee have to be of the type variable-frequency-drive that have current of nil
electrical-inrush.
F. Power factor : Within all the conditions of load, 95% power factor has to be maintained.
G. Exposed power : By the aid of UV-stabilized, non metallic and liquid tight conduits, wiring
for entire exposed power should be done.
H. Supplied Equipment : The contractor would be assessing the responsibility of additional
costings regarding deviations within equipments.
2.6 STARTER AND WIRING
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Providing of starter-panel mounted on unit should be there. Inclusion of metallic-
nameplate should be there which will help in identifying serial-numbers, phase, voltages and also
the maximum load in amperes.
2.7 CONTROL INTERFACE
Every installed air-conditioner should be interconnected with the Control-station through
the aid of multiplex-network for establishing high-levels controls.
2.8 INSTALLATION
Grease fittings have to be mounted as per the responsibility of contractor. By the
provisioning of valves, entire plant should be physically laid out.
2.9 FINISH
Painting of all the replaced air-condition system should be done within the factory.
Painting of chillers can be done at the site.
2.10 CABINET & TOOL
All the tools necessary for maintaining & servicing the equipments at unit within metal-
cabinet should be properly labelled.
I. CONTRACT TIME
The required time for contract completion is 3 months in approx. Total contract time of
this project is 2 Months and in this period the entire project will be completed. It is critical that
entire activities of the project will be completed in due time so that extra cost for implementing
the project could be reduced (Sultan, El-Sharkawy and Koyama, 2015). In addition to that all the
workers also needs to allocate task and work activities in planned manner so that additional cost
of the entity should not be spent and the project should get completed on due time and it will
save the cost of the organisation in completing the task for replacing the air conditioning system.
Entire project completed in the given time for this purpose all the activities are break on the
basis of cost and time it consumes. This make easy to identify the task which need to be
completed on the give time and task which delay not affect the project time and cost. Firstly
those task will be taken into consideration which are important and cannot be delayed so that
additional cost not need to pay for replacing the old conditioning system.
K. CONTRACT-COST
The estimated costing for entire contract is 10 to 12 HK$. The project for replacing the
air conditioning system will be given to a contracting organisation and the firm will be given
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instructions for replacing the existing air conditioning system in the firm. Contract is taken into
consideration in a legal manner with the total cost that £ 10000 so that contracting organisation
not try to breach the contract and complete it according to the contract terms and condition.
L. CONSTRAINTS
The most relevant constraint is likely to be the period of construction. The system air
conditioning cannot be paused. Timely cold water needs to be provided. Necessary materials
need to be transported within 10:00 to 12:30, 14:00 to 17:00 and afterwards 20:00. There are
several constraints that are faced while implementing the project as per the plan and thus it will
affect the overall project that is being planned for changing the air conditioning system used in
the 20 Storey Commercial building. Total time line for this project has been estimated to be 2
months and it is vital that the project should be completed in this period of time. Time can create
major constraints for completion of the project. One more constraint for completing this project
is Duration (Qv, Dong and Yao, 2017). The duration for the project is less and in that period it
is a challenging task for scheduling and completing all the activities of the project. Sometimes
client also changes their requirement and due to that problems are faced in completing the
projects. Moreover, Public safety and access or safety of opinions is one more constraint which
is faced by the organisation in properly implementing the replacement of air conditioning system
in the entity. One of the another constraint faced is related to cost because any critical task is
delayed than it will lead to increase in cost.
M. ACCEPTANCE OF PROJECT
The general specifications regarding Air conditioning system have to be followed.
These are provided by EMSD that is Electrical-And-Mechanical-Services-Department which is
government organisation of Hong Kong. Acceptance of the project show the gaining contractee
approval. For the project acceptance it is important to sign the contract by both the party. Further
the project can be accepted at the time when both the party accept all the terms and condition of
the project.
N. Any Standard Drawings
Project plan will be plotted on paper for how the plan will be successfully executed in the
20 story Commercial buildings. The entire plan was discussed with contractor and through
drawing a plan will show the location and connection of equipment system involves in different
elements which can be manage using concept draw.
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