SOW - 20B Cameron Essensa Towers Samsung Aircon Replacement.doc

Replacement of inverter ceiling cassette type Samsung aircon at USG owned units Essensa Towers

.Date

April 23, 2024

PROJECT

Replacement of Airconditioning Systems

SITE

20B Cameron Essensa Towers, Fort Bonifacio, Makati City

SCOPE OF WORK

1.1 GENERAL DESCRIPTION: The contractor shall furnish all required personnel, tools of trade, equipment, materials, transportation, delivery and a project Engineer/supervisor who will stay at the job site every work day throughout the progress of the project in connection with the replacement of two (2) complete sets of 6-HP Samsung VRF Inverter Multi-System Air-conditioning including all the indoor units with a brand new Mitsubishi VRF Inverter Multi-system condenser complete two (2) condensers with three (3) indoor units each serving the LR, DR, MBR, BR2, BR3 and Kitchen in 20B Cameron, Essensa Tower.

1.2 EXECUTION

1.2.1 Civil, carpentry and mechanical /metal Works

a) Remove all the old a/c condensers (outdoor units), accessories and mounting brackets in the Kitchen terrace.

b) Remove all the old ceiling cassette type a/c evaporators (indoor units) in bedrooms, living room, dining room and kitchen including its accessories, pipes and mounting brackets.

c) Clear the space with any obstructions such as metal studs, conduit, water piping, etc.

d) Repair the water proofing of a/c condensers room to accommodate the required space for two new Condensing units and to assure that there will be no water leak going to the unit below. As needed provide drain line from condenser to the floor drain.

e) Restoration of common area outside the unit shall be done by the contractor.

f) Restoration of walls and ceilings inside the unit affected by the air-conditioning unit installation shall be restored by the contractor/vendor.

g) Contractor shall secure and pay all permits and other related documents that are required by the local government and building administration to be able to install and operate the new a/c system.

1.2.2 Electrical

a) Provide brand new electrical conduits, connectors and it’s accessories, power carrying wire and control wires.

b) A dedicated circuit should be run from the electrical panel board to the outdoor units and indoor units.

c) Provide separate circuit breakers (Schneider Bolt-on or equivalent approved brand) in stainless steel 1.2 mm thick NEMA 3R enclosure for the two (2) aircon condensers/outdoor units. Circuit protection shall be in compliance with the recommendation of the air-conditioning unit’s manufacturer.

d) The contractor shall supply and install two (2) units intake air fan with suitable airflow to match the 2 (two condensing unit) complete with automatic control/thermostat and should be protected by an appropriate circuit breaker in stainless steel 1.2 mm thick NEMA 3R enclosure that are easily accessible and in safe location.

e) Conductor shall be rated as the size of the recommended circuit protections.

f) Electrical wiring: Condensing Units should have circuit home run with three (3) #8 AWG THHN conductors that are appropriate for the rating of the condensing units (Phelps Dodge brand or approve equivalent brand) for hot wire, one (1) #8 AWG THHN conductor (Phelps Dodge brand or approved equivalent) for grounding wire and (1) #8 AWG THHN conductor (Phelps Dodge brand or approved equivalent) for neutral wire with dedicated circuit breaker in the panel board. Use only liquid tight flexible metallic conduit with liquid tight fittings as raceway from nearest electrical box to condensing units. For outdoor electrical installations, use only liquid tight flexible metallic conduits complete with liquid tight utility box/octagonal box/pull box and fittings. For indoor electrical installations, use EMT and liquid tight flexible metallic conduits complete with liquid tight utility box/octagonal box/pull box and fittings.

g) Wiring to follow color coding: L1 - Red, L2 – Yellow, L3 – Blue, Nuetral – White, Ground – Green. Or whichever is applicable wire color coding to follow the building color coding.

h) Provide and install THHN control and communication wirings in flexible liquid tight metallic conduits and complete with correct and appropriate connectors and fittings from the outdoor units to the indoor units.

i) Provide and install a circuit breaker in stainless steel 1.2 mm thick NEMA 3R enclosure for each outdoor unit complete with wires in a flexible liquid tight metallic conduit and complete with correct and appropriate connectors and fittings.

j) Provide and install power supply wires from the circuit breaker of the outdoor unit going to the outdoor unit, indoor unit and to the main panel board located inside the house.

1.2.3 Mechanical

a) Removal of all existing old Condensers serving the living room, dining room, kitchen and all bedrooms.

b) Simultaneously install the aircon condenser units in the kitchen terrace.

c) Simultaneously replace the aircon units in Living room, Dining room, Kitchen area and all bedrooms.

d) Air conditioning units specs are the following:

2 units 6-HP VRF air conditioning unit each complete with three (3) hi-wall mounted evaporator for each condensing unit. Mitsubishi or approved equivalent brand that will fit into the existing condenser cabinet that meets the manufacturer’s required spacing between the condenser to wall, condenser to ceiling, condenser to condenser and condenser to floor. The available power supply for the Condenser and Evaporator is 220VAC/60Hz single phase. Each evaporator should have a condensate pump. The location of the ac units are in:

Set one (1):

One (1) 6.0-HP condenser

One (1) 2.5-HP evaporator in DR

One (1) 2.0-HP evaporator in Kitchen

One (1) 1.5-HP evaporator in BR2

Set two (2):

One (1) 6.0-HP condenser

One (1) 2.5-HP evaporator in LR

One (1) 2.0-HP evaporator in MBR

One (1) 1.5-HP evaporator in BR3

The VRF air conditioning units must be capable to operate at the following conditions:

Dry bulb Indoor cooling air temperature ----------------- 27 deg. Centigrade.

Wet bulb cooling air temperature ---------------------------19 deg. Centigrade.

Outdoor dry bulb cooling air Temperature--------------- 35 deg. Centigrade

Outdoor wet bulb cooling air temperature --------------- 24 deg. Centigrade.

The VRF air conditioning units shall be tested in conformity with the manufacturer’s standard.

1.2.4. Hanger and Support: Provide and install appropriate hangers and supports of best quality and of known brand for refrigerant piping and condensate drainpipe line. Fabricated and improvised hangers and supports are not allowed. Hanger spacing shall be 5 feet and ¼” diameter rod.

1.2.5.

Insulate the refrigerant and condensate piping with ¾” thick wall closed cell rubber insulation and wrap with polyethylene plastic tape.

1.2.6. Provide and install all the necessary soft drawn copper pipes, elbows, fittings, access valves etc. from the condenser (outdoor) unit to evaporator

(indoor) unit. Thickness of the copper pipes should be atleast 0.032” or thicker depending on the specifications of the A/C manufacturer.

1.2.7. Supply all the necessary tools, materials and labor to complete the project with good workmanship.

1.2.8. Leak test, vacuum and charge the a/c system with the appropriate type and amount of Freon.

1.2.9. Supply and charge the a/c system in accordance with the manufacturer’s standard.

1.2.10. Testing, commissioning and monitoring of the a/c units for 1 week.

Testing and commissioning should be done by the Engineers or

Technicians of the winning brand of airconditioning unit.

1.2.11. Contractor’s to provide 1 year warranty to equipment and workmanship from the date of final acceptance.

1.2.12. Contractor to provide technical training on operation, troubleshooting and maintenance to the technicians of FAC.

1.3 PERSONNEL

1.3.1 The Contractor shall provide sufficient personnel possessing the skills and knowledge to perform the work required of this project.

1.3.2 Immediately on commencement of work, the Contractor shall assign onsite a knowledgeable, trained and skilled project supervisor for this type of job who shall be responsible for the overall management and coordination of this contract, receive instructions from the COR, resolve problems and with authority to act and decide for the Contractor.

1.4 QUALITY CONTROL

1.4.1 All work shall be done in favorable weather conditions or the work shall be suitably protected from the weather.

1.4.2 All damages inflicted on the existing surrounding structures and property resulting from the performance of this project must be repaired or restored to its original condition by the Contractor at the Contractor's expense.

1.4.3 Liquidated damages (Refer to Section F.3, Liquidated Damages)

1.4.4 The contractor shall guarantee workmanship, electronic parts, fan motors for one (1) year and five (5) years for compressor motors determined from the date of final acceptance.

1.4.5 The contractor, its personnel and sub-contractors must follow all rules, regulations and policy in-place for construction works by Essensa Building Management. These include administrative, safety, noise, personnel access, use of elevators and lifts and other safety protocols.

1.5.

GENERAL LIABILITY (Amount of Insurance) (Includes premises/operations, collapse hazard, products, completed operations, contractual, independent contractors, broad form property damage, personal injury)

1. Bodily Injury on or off the site stated in Philippine Peso:

Per Occurrence PHP 100,000

Cumulative PHP 200,000

2. Property Damage on or off the site in Philippine Peso:

Per Occurrence PHP 150,000

Cumulative PHP 250,000

1.6

WORKING HOURS

1.6.1 The installation shall be done during normal working days from Monday thru Friday from 8:30 AM – 4:00 PM or as specified by the building Admin. Noisy works are from 10:00 AM – 12:00 AM and 2:00 PM – 4:00 PM, noisy works are hammering, drilling, coring and other works that will be specified by the building admin. There are no Holidays, Saturday, Sunday and overtime works in the building.

1.7

PROHIBITIONS

1.7.1 Smoking is strictly prohibited at the work site. Violators shall be permanently removed from the project.

1.7.2 Contractor’s personnel are to use only the toilet in Maid’s room.

1.8 SECURITY

1.8.1 Contractor's personnel must stay within the working site and not wander around the adjacent areas not covered under this scope of work.

1.8.2 Contractor's workers are prohibited to stay inside the work area after each day's work.

1.9 GOVERNMENT-FURNISHED MATERIALS, PROPERTY AND SERVICES

1.9.1 Electric power and water required for this project shall be supplied. The Contractor is responsible for all connections and extensions to the work area.

1.9.2 RESERVED

1.9.3 The COR shall designate the area where the contractor can store the materials to be used in this project. Temporary storage shall be kept clean, orderly and secured at all times. Contractor's personnel are not allowed to roam around the premises during work hours or stay after each day's work.

2.0 CONTRACTOR-FURNISHED MATERIALS / ITEMS Materials

2.0.1 The contractor shall provide all labor, and supplies to perform the services required in this contract.

2.0.2 2 units 6-HP VRF air conditioning each complete with three (3) hi-wall mounted evaporator Mitsubishi or approved equivalent brand that will fit into the existing condenser cabinet that meets the manufacturer’s required spacing between the condenser to wall, condenser to ceiling, condenser to condenser and condenser to floor. The contractor shall put up temporary barriers or yellow caution tapes to keep away people from work site.

2.0.3 The Contractor shall submit sample of all materials on board for approval of the COR. Materials and equipment incorporated in the work shall match the approved samples.

2.1 Equipment & Tools

2.1.1 The Contractor shall furnish all tools and special equipment to perform section 1.1.

2.1.2 All temporary connections to existing utility lines will be made by the Contractor. The Contractor shall enforce strict utilities conservation practices and at all times observe safety practices.

2.2 SPECIFIC TASKS

2.2.1 The contractor guarantees to complete the delivery of all the units within (90) ninety calendar days from the date of Notice to Proceed. The contractor guarantees to complete the installation, testing and commissioning works within thirty (30) calendar days from the date that the delivery of all the units are completed but there are no Holidays, Saturday, Sunday and overtime works in the building.

The time stated for completion shall include final clean up of the premises. The installation shall be done during normal working days from Monday thru Friday from 8:30 AM – 4:00 PM. Noisy works are from 10:00 AM – 12:00 AM and 2:00 PM – 4:00 PM, noisy works are hammering, drilling, coring and other works that will be specified by the building admin. There are no Holidays, Saturday, Sunday and overtime works in the building.

2.2.3 The Contractor shall submit to the COR or GTM a “Daily Log Sheet”, completed daily. Data to be reported includes data on workers by classification, the move-on and move-off of construction equipment furnished by the prime and subcontractor or furnished by the Government, and materials and equipment delivered to the site.

2.2.4 The contractor shall submit a performance schedule in the form of a “Bar Chart” indicating when the various portions of the work will be commenced and completed within the required schedule. This bar chart shall be in sufficient detail to clearly show each segregable portion of work and its planned commencement and completion date prior to the commencement of every project.

2.2.5 The contractor to haul the old condensers and old evaporators removed from 20B Cameron. To include old equipment disposal, documents shall be processed by FAC.

2.3 CLEANING TASKS

2.3.1 The contractor shall continuously practice good housekeeping during the progress of the work, remove and dispose of dirt and debris and keep work area clean, neat and orderly and in such order as to prevent safety hazards. Debris shall be collected and removed from the job-site daily.

2.3.2 Domestic rubbish containers on the premises shall not be utilized by the Contractor for storage or disposal of construction rubbish.

2.4 SAFETY

2.4.1 The project safety, in all respects, is the sole responsibility of the Contractor.

2.4.2 The Contractor shall assume absolute responsibilities for any /all injuries and property damages or losses due to contractor negligence or unsafe working environment.

2.4.3 The Contractor shall comply with the U.S. OSHA (Occupational Safety and Health Administration) and Local Safety and Health Requirements, and shall assume full responsibility and liability for compliance with all other applicable standards and regulations pertaining to accident prevention, life, health, and safety of personnel, as well as preventing damage to materials, supplies, and equipment. The Contractor will hold the Government and its agents harmless for any action, errors, or omission on his part, his employees, or his subcontractors that result in illness, injury or death.

2.4.4 The Contractor shall provide employees with and require the use of safety equipment, personal protective equipment and device necessary for protection.

2.4.5 The Contractor is responsible for all injuries to his workers.

2.5 SUBMITTALS:

2.5.1 The contractor shall submit to Essensa East Forbes Condominium the following, as required by the building management, prior to the start of work:

a) Detailed mechanical plan, preferably in A3 size

b) Electrical single line diagram, preferably in A3 size

c) Design layout of transom louver, louver door and plenum

d) PERT CPM (installation)

e) Six thousand pesos (P6,000.00) or depending on the prevailing charge per individual residence as payment for the aircon migration fee

f) Work permits, access permits and payments for use of elevator and other building facilities and equipment/s.

g) Bonds and insurances

h) COVID Test and compliance to COVID protocols, if necessary.

2.5.2 The contractor shall submit to the COR the following:

a) Gantt chart for program of works prior to commencement of construction

b) Operations manual

2.5.3 The vendor shall submit to FAC COR the following:

b) A complete operation, troubleshooting and parts manual of the a/c system.

C) List of recommended spare parts for one year

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