Marriott o&m Manual Hvac

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AL HAMAD CONSTRUCTION & DEVELOPMENT CO W.L.L. (BAHRAIN)OPERATION AND MAINTENANCE MANUAL - HVAC



HVAC SYSTEM



OPERATION & MAINTENANCE MANUAL



INDEX

1. INTRODUCTION.

2. SYSTEM DESCRIPTION.

a. AIR CONDITIONING SYSTEM.

b. CENTRALIZED VENTILATION SYSTEM.

c. SMOKE CONTROL SYSTEM.

d. CAR PARK EXHAUST SYSTEM.

e. STAIR WELL PRESSURIZATION SYSTEM.



f. BUILDING MANAGEMENT SYSTEM.

3. LIST OF EQUIPMENTS.

4. LIST OF SUPPLIERS.

5 .OPERATION & MAINTANENCE MANUAL

6 .LIST OF RECOMMENDED SPARE PARTS.

7 .SITE TEST REPORT.

8 .WARANTY CERTIFICATES.

9. LIST OF ASBUILT DRAWINGS.



SYSTEM DESCRIPTION

a.AIR CONDITIONING SYSTEM.

b.CENTRALIZED VENTILATION SYSTEM.

c.SMOKE CONTROL SYSTEM.

d.CAR PARK EXHAUST SYSTEM.

e.STAIR WELL PRESSURIZATION SYSTEM.




LIST OF EQUIPMENTS



LIST OF SUPPLIERS



OPERATION AND MAINTENANCE MANUAL



LIST OF RECOMMENDED SPARE PARTS.



SITE TEST REPORTS.



WARRANTY CERTIFICATES



LIST OF AS BUILT DRAWINGS



Air Conditioning System.



Centralized Ventilation System .



Smoke Control System.



Car Park Exhaust System.



Stairwell Pressurization System.



Building Management system.




Direct Digital Control provides monitoring and controls of the HVAC, Plumbing, HV, LV, Panels installed in the building. It collects data, performs alarm analysis, and schedules equipment operations.

HVAC system consists of following equipments.

1. Chiller – 3 no’s (each tower).

2. Primary Pump – 4 no’s (each tower).

3. Secondary Pump – 2 no’s (each tower).



4. Fresh Air Handling Unit–2 no’s (eachtower).

5. Air Handling Unit – 6 no’s (both tower).

6. Fan Coil Unit – 890 no’s (both tower).

7. Smoke Exhaust Fan – 5 no’s (both tower)

8. Stairwell Pressurization Fan – 4 no’s (each tower)

9. Kitchen Exhaust Fan – 5no’s(each tower)

10. Toilet Exhaust Fan – 5 no’s (each tower)

11. Main Kitchen Exhaust Fan – 1 no

12. Main Kitchen Fresh Air Fan – 1 no

13. Car Park Exhaust Fan – 4 no’s(common)



Chillers will be controlled by its self Micro-processor panel. Secondary and Primary Pump, FAHU, AHU, FCU, KEF, TEF, CPEF are controlled & monitored through DDC controller. Speed modulation of fans is through Variable Frequency Drives.

Basement, Ground floor, Mezzanine floor, and Terrace floor exhaust fans are controlled and monitored by DDC controllers through volt free contacts available in Electrical Starter Panel.

SEF, SPF is interlinked with fire alarm hardware cables, and it will work independent when fire happens. We are getting feed back from above mentioned equipments through DDC controller.

Sprinkler, Sweet Water System, Hot water system and domestic Water system shall be monitored by DDC controller. Irrigation Water System shall be monitored by DDC controller.

HV and LV Switchgear will be hardware interfaced for monitoring through Volt Free



Contact into DDC controller. Generator is also through hardware interfacing through Volt Free contact into DDC controller.

2. SYSTEM DESCRIPTION.

MARRIOTT EXECUTIVE APPARTMENT Hotel is fully Air Conditioned building its having two towers each tower 21 floors. Basement, Ground, Mezzanine floor and Twentieth floors are common for both towers. Each tower is having separate Chilled water system and Centralized Toilet & kitchen Exhaust system. All works carried out as per Tender Drawing and Standards. MARRIOTT EXECUTIVE APPARTMENT Hotel is having SIX type of system as listed below.

a. Air Conditioning system.b. Centralized Ventilation System.



c. Smoke Control system.d. Car Park Exhaust system.e. Stairwell Pressurization system.f. Building Management System.

2, a. Air Conditioning System.

Air conditioning is to maintain the temperature, relative humidity and air purity & circulation inside the room for human comfort. Normally we considered for Human Air conditioning is 23°c and 5o% rh (comfort Zone).

Following equipments are included in this system.

1. Air Cooled screw Chiller.2. Primary Pump.3. Secondary Pump.



4. Sealed Pressurization Unit.5. Fresh Air Handling Unit.6. Air Handling Unit.7. Fan Coil Unit.

2, a, 1. Air Cooled Screw Chiller. Air Cooled Screw Chiller is used to reduce the water temperature to circulate water as a secondary refrigerant. Water temperature will be maintained in between 12°c to 4.5°c.

2, a, 2. Primary Pumps.

Primary Pump is used in this system to circulate water into primary side to cool the water.

2, a, 3.Secondary Pumps.

Secondary pump is used in this system to circulate water which is coming from chiller to all AHU & FCU’s to produce cooling. Major part



of the system is included in this system such as supply pipe, AHU & FCU, return pipe.

The delivery of the secondary pump will ensure to satisfy a minimum operating pressure requirement of the system at the remote area to achieve Human Comfort.

Energy Saving Equipment and fittings are used in this system such as two ways & three way modulating valve to minimize the wastage of cooling. Electrically operated VFD is placed to run secondary chilled water pump to minimize the un necessary chill water flow.

2, a, 4.Sealed Pressurization Units.

Sealed Pressurization unit is designed to make up any losses due to system leakage and to automatically maintain the initial system design



pressure in Closed Circuit system which is placed in nineteenth floor.

It comes fully fitted with a reservoir tank with type “A” air gap and ball valve, single pump, pump strainer, pump discharge isolators,

pressure switch controls and a door interlocked isolators.

2, a, 5.Fresh Air Handling Units.

Fresh Air handling unit is connected to all floors and flats to supply treated fresh air. It’s located in the twenty first floors with VFD control device to control air flow.

Each and every flat is connected with the VAV to control the air flow with the help of pressure differential switch and VFD.

2, a, 6.Air Handling Units.

Air handling unit is placed in Ground floor, Mezzanine floor to serve public area such as



Reception, Lounge, and Residence Lounge, Internet Café, Laundry and corridor. It’s connected with necessary duct routing and damper arrangement with air outlet Diffuser’s.

2, a, 7, Fan Coil Units.

Fan coil units are located above the false ceiling at various places like toilet, kitchen and lift lobby with necessary pipe and valve fittings and ducting.

Fan coil units are controlled by individual thermostat which is located inside bed room and FCU serving areas. 2, b, Centralized Ventilation System.

MARRIOTT EXECUTIVE APPARTMENT Hotel is having fully centralized toilet and kitchen ventilation system. Toilet and Kitchen exhaust fans (5 no’s each) are located at terrace floor.



Each and every floors and flats are connected to toilet and kitchen exhaust fan with necessary duct routings, dampers, and fire dampers. All works are carried out as per Tender drawing and Standards.

Toilet exhaust fans are connected with star delta starter, Kitchen exhaust fans are connected with VFD. Kitchen exhaust fan will run normal speed when kitchen hood switched on fan will run full speed.

2, c, Smoke Control System.

Smoke control system is used to meet the LIFE SAFETY requirement. All public areas such as Corridor, Lounge, Reception areas are included in this smoke control system to extract smoke from that said areas.

Smoke extract fan is located at terrace floor and it’s connected to all floor main corridors through 50mm thick fire rated fiber glass insulation with 2 no’s of Motorized damper/floor.



Smoke extract fan and motorized damper are interlocked with fire alarm system. When fire accident happen fire alarm will give signal to start smoke extract fan, and signal to motorized damper to open and extract smoke from public areas to escape people without any problem.

2, d, Car Park Exhaust system.

Basement floor is allotted for car park area. Variable Frequency Drive Exhaust fan is used to extract the smoke which is coming from vehicle. All ducts are carried out as per Tender Drawing and standards.

Car park ventilation duct is fully insulated with 50mm thick fire rated fiber glass insulation with necessary coating. Duct is running parallel to the wall and connected with air intake grills.

Car park ventilation fan will run continuously in slow speed to extract smoke. When fire happen



smoke detector will sense which is located at various place and give signal to fan to run maximum speed.

2, e, Stairwell Pressurization System.

Stairwell Pressurization system is used to avoid fire entry into the staircase. Stairwell pressurization is located exactly above to the staircase with Variable Frequency Drive and necessary duct connection.

When fire accident happen any were inside the building, fire alarm will give signal to start the fan. After getting signal from fire alarm, fan will run and blow air into the staircase to maintain the positive pressure than the



other areas to avoid fire entry into the staircase.

It will help people to escape without any problem from fire. If pressure exceeding inside the staircase more than 60 Pascal DP sensors will give signal to slow down the fan speed.



INTRODUCTION

The purpose of this manual is to guide the user on the OPERATION & MAINTANANCE of HVAC system at MARRIOTT EXECUTIVE APARTMENTS – Juffair, BAHRAIN.

PROJECT : MARRIOTT EXECUTIVE APARTMENTS – BAHRAIN.

CLIENT : GULF TOURISTIC PROJECTS

CONSULTANT : MSCEB – BAHRAIN.



The MARRIOTT EXECUTIVE APARTMENT building consists of two identical towers of. The HVAC system for this building are arranged to meet the following codes and standards.

1. British Standards Specification and Codes of practice.

2. Standards and Guidelines issued by ASHRAE, USA.

3. Standards and Guidelines issued byChartered Institution of Building Services Engineers, UK.

The following HVAC systems are installed as per approved drawing in this apartment and the brief description of each system will be followed in system description.



Air Conditioning System. Centralized Ventilation System. Smoke Control System. Car Park Exhaust System. Stairwell Pressurization System. Building Management System

We know that efficiency and effectiveness of the system mainly depends upon the proper maintenance of the system. Therefore the system shall be operated and maintenance by trained personnel as per guidelines given in this manual.



INTODUCTION



LIST OF EQUIPMENTS

1. Air Cooled Screw Chillers.2. Primary Chilled Water Pumps.3. Secondary Chilled Water Pump.4. Pressurization Unit. 5. Fresh Air Handling Units.6. Air Handling Units.7. Fan Coil Units.8. Kitchen Exhaust Fan.9. Toilet Exhaust Fan.10.Smoke Exhaust Fan.11.Stairwell Pressurization Fan.12.Car Park Exhaust Fan.13.Split Type A/c.



LIST OF RECOMMENDED SPARE PARTS

1. Fan belts for AHU.

2. Motor / Fan pulley.

3. Bearings.

4. AHU / FCU air filters.

5. Strainer filter.



O & M MANUAL

FOR

AIR COOLED SCREW CHILLER



O & M MANUAL

FOR

VALVES



O & M MANUAL

FOR

VARIABLE FREQUENCY DRIVE



O & M MANUAL

FOR

AIR HANDLING UNITS



O & M MANUAL

FOR

EXHAUST FANS



O & M MANUAL

FOR

SPLIT A/c



O & M MANUAL

FOR

PRESSURIZATION UNIT



O & M MANUAL

FOR

CHILLED WATER PUMP



O & M MANUAL

FOR

FAN COIL UNIT



O & M MANUAL

FOR

VARIABLE AIR VOLUME



O & M MANUAL

FOR

MOTORIZED VALVES



O & M MANUAL

FOR

AIR & WATER TEPERATURE SENSOR’S



O & M MANUAL

FOR

VOLUME CONTROL DAMPER’S



O & M MANUAL

FOR

SOUND ATTENUATOR’S



O & M MANUAL

FOR

FIRE DAMPER’S



O & M MANUAL

FOR

MOTORIZED DAMPER’S



O & M MANUAL

FOR

BUILDING MANAGEMENT SYSTEM



FACTORY TEST CERTIFICATES



WILL BE SUBMITTED LATTER



SITE TEST REPORTS



WARANTY CERTIFICATE



LIST OF ASBUILT DRAWING





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Marriott o&m Manual Hvac