Dammam University-Compliance Statement

7/30/2019 Dammam University-Compliance Statement

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PART 1 - GENERAL ARRIER COMMENT REMARKS

1.01 DESCRIPTION

A. General:

1. Furnish all labour, materials, tools, equipment, and services for all air handling units as NotedCarrier scope covers only supply of HVAC

equipments

indicated on the drawings and in accord with provisions of Contract Documents.

2. Completely co-ordinate with work of all other trades. By installation contractor

3. Although such work is not specifically indicated, furnish and install all supplementary or Noted

miscellaneous items, appurtenances and devices incidental to or necessary for a sound,

secure and complete installation.

4. See Section 15050, for Basic Mechanical Requirements. Noted

5. See Division 1, for General Requirements. Noted

6. Abbreviations: Noted

a.AMCA : Air Moving and Conditioning Association. Noted

b.ASHRAE: American Society of Heating, Refrigeration and AirConditioning Engineers. Noted

c.ARI : Air-Conditioning and Refrigeration Institute. Noted

7. The Contractor shall calculate without extra cost the final required fan static pressure Noted

which shall be submitted to the Engineer for approval. Noted

1.02 SUBMITTAL

A.Shop drawings and product data of all components. CompliedAHU shop drawing shall be provided on receipt of

order

B.Curves showing fan performance with actual system operating point plotted on fan curve. CompliedFan curves shall be provided once the final

computer selection is approved

C.Cooling coil performance. Complied See computer selection

D.Manufacturer's installation instructions. Complied

E.Operation & Maintenance Data: See section 01783. Not in Carreir scope Manual shall be provided

F.Guarantees, See Section 01788. Noted

SECTION 15720

AIR HANDLING UNITS

COMPLIANCE STATEMENT FOR CARRIER HVAC EQUIPMENTS

DAMMAM UNIVERSITY

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SECTION 15720

AIR HANDLING UNITS


DAMMAM UNIVERSITY

1.03 QUALITY ASSURANCE

A. Standards:

1.AMCA Standard 210, Test Code for Air Moving Devices. Noted

2.NFPA 90-A Standard for the Installation of Air Conditioning and Ventilating Systems, latest editionNoted

3.ARI Standard 410-72, Forced Circulation Air-Cooling and Air-Heating Coils. Noted

PART 2 - PRODUCTS

2.01 AIR HANDLING UNITS

A. Air handling units: Motor, adjustable drive, fan sections, coil sections, access sections and CompliedMotor size over 11 KW will be provided with fixed

pulley, however, pulley can be replaced to adjust

the air flow

other components as indicated:

1.Sections: Rigid die-formed and integrally welded construction of heavy gauge galvanised steel. Complied

2.Fasten sections together with cadmium plated bolts. Complied

3.Protect all surfaces against corrosion. Complied

4.Hot-dip galvanised drain pan and cooling section. Complied

5.Finish all other casing parts by degreasing and coating with chlorinated rubber enamel, CompliedFrame from galvanized steel and are finished with

50micron weather proof powder paintmanufacturers standard colour.

B. Type: Provide draw-through, vertical, variable or constant volume as indicated in the Complied

schedules.

C. Casings: Panels with independent structural frame carrying bearings, motor, and other Complied Panel are fixed to frame with external srews

components, or heavy gauge, bolt together construction with end panels carrying bearings.

D. All units shall be of double skin construction insulated between the skins. Complied

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SECTION 15720

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1.Removable access panels hinged type for inspection for each section without dismantling. CompliedRemovable panel for easy service access. Hinged

access door will be provided for fan and filter

sections

2.Designed and rated for pressure systems served. Complied

3.Insulate all panels with 25 mm thick neoprene coated Fiberglass insulation, "K" value CompliedExceed the specs. Panel comes with 5mm thick

40kg/m3 density injected polyurethane insulation k

= 0.019 W/M.C

(at 24oC) 0.038 W/m2 degree C maximum.

E. Fans: AMCA rated, forward curved with especially designed scrolls. Comlied

1.Speeds: Below initial critical speed of shaft wheel assembly. Comlied

2.Bearings: Self-aligning type with seals, with top grease connections and bottom relief Complied Cartrige sealed bearingsplug for each bearing.

3.Extend grease fitting on drive side outside of belt guard. Not applicable

F. Drives: Complete with universal bases with heavy duty special adjustment devices, adjustable CompliedAdjustable drive applicabl for the units with upto

11kw motors

V-belt drives and easily removable belt guard.

1.Provide extra heavy mounting bases for large size motors. Complied Reinformced bearing

2.Arrange ductwork from units so that there is no conflict with motors. By installation contractor

3.Arrange belt guard so that speed can be measured without removing guard. Complied

4."V" belts and drives: Designed for 150 percent of motor capacity. Complied

5.Motors mounted on slide rail or pivoted bases.Complied

6.Variable volume AHU's

shall use fans with variable frequency drives and DDC temperature controlNot in Carrier scope of supply VFD and DDC to be provided by others

G. Motors: Squirrel cage, general purpose: NEMA frame, for 220 V, 3 phase, 60 hertz, sufficientComplied, Totally enclosed fan

cool (TEFC) with finned casing

surface

IP55 proteced from dust and water

capacity to move required amount of air at static pressure indicated.

2.02 COIL SECTIONS

A. Coils - General

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1.Coil capacity, as scheduled. Complied see computer selaction

2.Housing: Heavy gauge galvanised steel with 1.4 mm galvanised steel frame for bolting Complied

to other sections.

3.Coils shall be constructed of copper tubing with aluminum or copper fins (maximum of Complied

10 fins per 25 mm) or helical type.

4.Headers: Copper. Complied

5.Air face velocity: Not exceeding 2.5 M/s. Complied

6.Provide vent and drain connections at high and low points respectively. Complied

7.Make all coils drainable type.. Complied

8.Provide drain pan for each cooling coil section. Complied

9.Drain pan: Insulated to match casing with minimum 32 mm drain and rust resistant Compliedinterior finish.

10.ARI certified. Complied

2.03 VIBRATION ISOLATION

A.Refer to section 15070, Mechanical Sound, Vibration, and Seismic Control. Noted See computer selection for sound data

B.Spring type with steel base Complied Fan section is provided with isolators

2.04 FILTERS

A.As indicated on drawings. Noted

B.See Section 15885, Air Filter. Noted

2.05 STEAM HUMIDIFIER Not included in carrier scope of supply

Steam humidifier shall be provided for humidity control with duct distribution package

electronically controlled.

1.The humidifier shall be capable of generating steam from ordinary tap water, and shall

be UL listed.

2.The humidifier shall have full modulating control from 0 to 100 percent capacity.

3.The humidifier shall incorporate an electronic timer to control the water drain cycle

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which will evacuate minerals and particles. Automatic drain cycle shall be adjustable

with a drain duration range and a drain interval range.

4.The humidifier fill line shall have an air gap to prevent back-flow of contaminated water

into the water supply system.

5.The humidifier shall be equipped with stainless steel steam dispersion tube(s) to

provide uniform steam distribution over the entire tube length which shall adequately

span the widest duct dimension at installation point.

6.The humidifier shall be supplied with a solid state electronic sensor controller

(humidistat) capable of fully modulating the steam flow and with high limit humidistat.

7.The humidifier shall be installed in strict accordance with equipment manufacturer

recommendations and shall be connected to nearest water supply, and to nearest floordrain.

2.06 AHU SERVING COMPUTER AREA Not included in Carrier scope of supply

A.AHU serving computer area shall be connected to both main chilled water loop and 24-hour

loop, by two sets of motorised shut-off valves.

B.Normally the AHU will be served by the 24-hour loop, but in case of emergency it shall be

served automatically (via BMS) by the main loop.

C.The AHU shall be equipped with high efficiency type air filter of not less than 65% efficiency,

and a pre-filter of not less than 20% efficiency.

PART 3 - EXECUTION By installation contractor

3.01 INSTALLATION

A.Install as indicated and in accord with manufacturer's recommendations and instructions.

B.Provide drain line from AHU to nearest floor drain or as indicated.

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