undp / papp office building – ramallah · undp / papp office building – ramallah ... a. verify...

UNDP / PAPP OFFICE BUILDING – RAMALLAH

HVAC WORKS

“ Specifications ”

July 2008

ENGINEERING UNIT

UNDP - PAPP

UNDP Building – Ramallah

UNDP – Engineers 1

SECTION 15105

HVAC PIPES AND TUBES

PART 1 GENERAL

1.1 SUMMARY

A. Section Includes: Pipe and pipe fittings for the following systems: 1. Chilled water and heating water piping. 2. Equipment drains and over flows. 3. Unions and flanges.

1.2 SUBMITTALS

A. Shop Drawings: Indicate layout of piping systems, including equipment, critical dimensions, and sizes.

B. Product Data: Submit data on pipe materials and fittings. Submit manufacturers catalog information.

C. Design Data: Indicate pipe sizes. Indicate pipe sizing methods. Indicate calculations used.

D. Welders’ Certificate: Include welders’ certification of compliance with ASME.

1.3 DELIVERY, STORAGE, AND HANDLING

A. Furnish temporary end caps and closures on piping and fittings. Maintain in place until installation.

B. Protect piping from entry of foreign materials by temporary covers, completing sections of the Work, and isolating parts of completed system.

1.4 FIELD MEASUREMENTS

A. Verify field measurements prior to fabrication.

1.5 COORDINATION

A. Coordinate installation of piping with other trades. Special attention should be given to piping in tunnel in regard to zones allowed for each trade.



PART 2 PRODUCTS

2.1 CHILLED WATER AND HEATING WATER PIPING, ABOVE GROUND

A. Steel Pipe 65 mm and larger: ASTM A53/A53M Seamless Schedule 40, black, rolled grooved ends or beveled ends for butt welding. 1. Fittings: ASTM A395/A395M and ASTM A536 ductile iron, grooved ends or

black steel beveled ends for butt welding. 2. Joints: Butt welding or Grooved mechanical couplings meeting ASTM F1476.

a. Housing Clamps: ASTM A395/A395M and ASTM A536 ductile iron, enamel coated, compatible with steel piping sizes, rigid or flexible type.

b. Gasket: Elastomer composition for operating temperature range from 4 degrees C to 100 degrees C.

c. Accessories: Stainless steel bolts, nuts, and washers.

B. Steel Pipes 50 mm and smaller: ASTM A53/A53M Seamless Schedule 40, black, threaded ends. 1. Fittings: ASME B16.3, malleable iron. 2. Joints: Threaded.

2.2 EQUIPMENT DRAINS AND OVERFLOWS

A. Fan Coil Units and Split Units: UPVC pipes and fittings to BS 4514 with solvent weld connections.

B. For Air Handling Units: Galvanized steel to BS 1387 medium weight with screwed connections and galvanized wrought carbon steel fittings.

2.3 UNIONS AND FLANGES

A. Unions for Pipe 50 mm and Smaller: 1. Ferrous Piping: Class 250 , malleable iron, threaded. 2. Dielectric Connections: Union with galvanized or plated steel threaded end,

copper solder end, water impervious isolation barrier.

B. Flanges for Pipe 65 mm and Larger: 1. Ferrous Piping: Class 250 , forged steel, raised neck flanges. 2. Gaskets: 1.6 mm thick preformed neoprene gaskets.

C. UPVC Pipe Materials: For connections to equipment and valves with threaded connections, furnish solvent-weld socket to screwed joint adapters and unions.



PART 3 EXECUTION

3.1 PREPARATION

A. Ream pipe and tube ends. Remove burrs. Bevel plain end ferrous pipe.

B. Remove scale and dirt on inside and outside before assembly.

C. Prepare piping connections to equipment with flanges or unions.

D. Keep open ends of pipe free from scale and dirt. Protect open ends with temporary plugs or caps.

3.2 INSTALLATION - ABOVE GROUND PIPING

A. Route piping in orderly manner and maintain gradient. Route parallel and perpendicular to walls.

B. Install piping to maintain headroom without interfering with use of space or taking more space than necessary.

C. Group piping whenever practical at common elevations.

D. Sleeve pipe passing through partitions, walls and floors. Refer to Section 15060.

E. Install piping to allow for expansion and contraction without stressing pipe, joints, or connected equipment. Refer to Section 15125.

F. Provide clearance in hangers and from structure and other equipment for installation of insulation and access to valves and fittings. Refer to Section 15080.

G. Provide access where valves and fittings are not accessible.

H. Install non-conducting dielectric connections wherever jointing dissimilar metals.

I. Establish invert elevations, slopes for drainage to one percent minimum. Maintain gradients.

J. Slope piping and arrange systems to drain at low points.

K. Protect piping systems from entry of foreign materials by temporary covers, completing sections of the Work, and isolating parts of completed system.

L. Install piping penetrating roofed areas to maintain integrity of roof assembly.

M. Install valves in accordance with Section 15110.

N. Install piping specialties in accordance with Section 15120.



O. Insulate piping. Refer to Section 15080.

P. Install pipe identification in accordance with Section 15075.

3.3 FIELD QUALITY CONTROL

A. Test heating water piping system, condenser piping system and chilled water piping system in accordance with ASME B31.9. Minimum test pressure is 1.5 times the working pressure.

3.4 CLEANING

A. After completion, fill, clean, and treat heating water piping system, condenser water piping system and chilled water piping system. Refer to Section 15185.



SECTION 15110

HVAC VALVES

PART 4 GENERAL

4.1 SUMMARY

A. Section Includes: 1. Gate valves. 2. Globe valves. 3. Ball valves. 4. Butterfly valves. 5. Check valves.

4.2 SUBMITTALS

A. Product Data: Submit manufacturers catalog information with valve data and ratings for each service.

B. Manufacturer's Installation Instructions: Submit hanging and support methods, joining procedures.

C. Manufacturer's Certificate: Certify products meet or exceed specified requirements.

4.3 CLOSEOUT SUBMITTALS

A. Project Record Documents: Record actual locations of valves.

B. Operation and Maintenance Data: Submit installation instructions, spare parts lists, exploded assembly views.


A. Accept valves on site in shipping containers with labeling in place. Inspect for damage.

B. Provide temporary protective coating on cast iron and steel valves.

PART 5 PRODUCTS

5.1 GATE VALVES

A. GA-1, 50 mm and Smaller: PN20, bronze body, bronze trim, threaded bonnet, non-rising stem, hand-wheel, inside screw with back-seating stem, solid wedge disc, alloy seat rings, threaded ends.



B. GA-2 65 mm and Larger: PN16, cast iron body, bronze trim, bolted bonnet, non-rising stem, hand-wheel, outside screw and yoke, solid wedge disc with bronze seat rings, flanged ends. Furnish chain-wheel operators for valves 150 mm and larger mounted over 2400 mm above floor.

5.2 GLOBE VALVES

A. GL-1 50 mm and Smaller: PN20, bronze body, bronze trim, threaded bonnet, hand wheel, teflon composition disc, threaded ends.

B. GL-2 65 mm and Larger: PN16, cast iron body, bronze trim, hand wheel, outside screw and yoke, flanged ends. Furnish chain-wheel operators for valves 150 mm and larger mounted over 2400 mm above floor.

5.3 BALL VALVES

A. BA-2 50 mm and Smaller: PN20, bronze, two piece body, ball, full port, teflon seats, blow-out proof stem, threaded ends, lever handle with extended stem.

5.4 BUTTERFLY VALVES

A. BF-1 65 mm and Larger: PN16. 1. Body: Cast or ductile iron, grooved ends, stainless steel stem, extended neck. 2. Disc: Elastomer coated ductile iron. 3. Seat: Resilient replaceable EPDM. 4. Handle and Operator: Infinite position lever handle with memory stop. Hand-

wheel and gear drive. Furnish gear operators for valves 125mm and larger, and chain-wheel operators for valves mounted over 2400 mm above floor.

5.5 CHECK VALVES

A. Horizontal Swing Check Valves (Non Slam Type): 1. CK-1 50 mm and Smaller: PN20, bronze body and cap, bronze seat, Buna-N

teflon disc, threaded ends. 2. CK-2 65 mm and Larger: PN16, cast iron body, bolted cap, bronze or cast iron

disc, renewable disc seal and seat, flanged ends or grooved ends.

B. Spring Loaded Check Valves: 1. CK-6 50 mm and Smaller: PN20, bronze body, in-line spring lift check, silent

closing, Buna-N teflon disc, integral seat, threaded ends. 2. CK-7 65 mm and Larger: PN16, globe style, cast iron body, bronze seat, center

guided bronze disc, stainless steel spring and screws, flanged ends or grooved ends. Valve shall be non-slam type.



PART 6 EXECUTION

6.1 EXAMINATION

A. Verify piping system is ready for valve installation.

6.2 INSTALLATION

A. Install valves with stems upright or horizontal, not inverted.

B. Install brass male adapters each side of valves in copper piped system. Solder adapters to pipe.

C. Install 20 mm gate valves with cap for drains at main shut-off valves, low points of piping, bases of vertical risers, and at equipment.

D. Install valves with clearance for installation of insulation and allowing access.

E. Provide access where valves and fittings are not accessible. Coordinate size and location of access doors with other trades.

F. Refer to Section 15060 for pipe hangers.

G. Refer to Section 15080 for insulation requirements for valves.

H. Refer to Section 15105 for piping materials applying to various system types.

6.3 VALVE APPLICATIONS

A. Install shutoff and drain valves at locations indicated on Drawings in accordance with this Section.

B. Install ball or butterfly valves for shut-off and to isolate equipment, part of systems, or vertical risers.

C. Install spring loaded or swing check valves non- slam type on discharge of water pumps.

D. Install grooved end butterfly valves adjacent to equipment when functioning to isolate equipment.



SECTION 15120

HVAC PIPING SPECIALTIES

PART 7 GENERAL

7.1 SUMMARY

A. Section Includes: 1. Pressure gages. 2. Pressure gage taps. 3. Thermometers. 4. Thermometer supports. 5. Test plugs. 6. Static pressure gages. 7. Flexible connectors. 8. Pressurization unit and expansion tanks. 9. Air vents. 10. Air and dirt separators. 11. Strainers. 12. Flow controls. 13. Relief valves.

7.2 PERFORMANCE REQUIREMENTS

A. Flexible Connectors: Provide at or near pumps, compressors and motorized equipment where piping configuration does not absorb vibration.

7.3 SUBMITTALS

A. Product Data: Submit for manufactured products and assemblies used in this Project. 1. Manufacturer’s data and list indicating use, operating range, total range,

accuracy, and location for manufactured components. 2. Submit product description, model, dimensions, component sizes, rough-in

requirements, service sizes, and finishes. 3. Submit schedule indicating manufacturer, model number, size, location, rated

capacity, load served, and features for each piping specialty. 4. Submit electrical characteristics and connection requirements.

B. Samples: Submit one unit of each of the above mentioned piping specialities.

C. Manufacturer's Installation Instructions: Submit hanging and support methods, joining procedures, application, selection, and hookup configuration. Include pipe and accessory elevations.

D. Manufacturer's Certificate: Certify products meet or exceed specified requirements.




A. Project Record Documents: Record actual locations of actual locations of components and instrumentation.

B. Operation and Maintenance Data: Submit instructions for calibrating instruments, installation instructions, assembly views, servicing requirements, lubrication instruction, and replacement parts list.


A. Accept piping specialties on site in shipping containers with labeling in place. Inspect for damage.

B. Provide temporary protective coating on cast iron and steel valves.

C. Protect systems from entry of foreign materials by temporary covers, caps and closures, completing sections of the work, and isolating parts of completed system until installation.


A. Verify field measurements before fabrication.

PART 8 PRODUCTS

8.1 PRESSURE GAGES

A. Gage: ASME B40.1, UL 393 with bourdon tube, rotary brass movement, brass socket, front calibration adjustment, black scale on white background. 1. Case: Stainless steel. 2. Bourdon Tube: Type 316 stainless steel. 3. Dial Size: 102 mm diameter. 4. Mid-Scale Accuracy: 1/2 percent. 5. Scale: Bar 6. Dial: Glycerin submerged.

8.2 PRESSURE GAGE TAPS

A. Needle Valve: Stainless Steel, 6 mm NPT for minimum 2070 kPa.

8.3 STEM TYPE THERMOMETERS

A. Thermometer: ASTM E1, red appearing mercury, lens front tube, cast aluminum case with enamel finish. 1. Size: 178 mm scale. 2. Window: Clear Lexan. 3. Stem: Brass, 20 mm NPT, 89 mm long.



4. Accuracy: ASTM E77 2 percent. 5. Calibration: Degrees C. 6. Range: Select to suit application with average reading in the middle.

8.4 THERMOMETER SUPPORTS

A. Socket: Brass separable sockets for thermometer stems with or without extensions, and with cap and chain.

B. Flange: 76 mm outside diameter reversible flange, designed to fasten to sheet metal air ducts, with brass perforated stem.

8.5 TEST PLUGS

A. 6 mm NPT or 13 mm NPT stainless steel fitting and cap for receiving 3 mm outside diameter pressure or temperature probe with: 1. Neoprene core for temperatures up to 93 degrees C. 2. Nordel core for temperatures up to 176 degrees C. 3. Viton core for temperatures up to 204 degrees C.

B. Test Kit: 1. Carrying case, internally padded and fitted containing:

a. Two 89 mm diameter pressure gages: 1) Scale range: 0-15 Bar 2) Scale range: 0-10 Bar

b. Two gage adapters with 3 mm probes. c. Two 100 mm dial thermometers with probe:

1) Scale range: 0 to 50degrees C. 2) Scale range: 0 to 100 degrees C.

8.6 STATIC PRESSURE GAGES

A. Dial Gages: 89 mm diameter dial in metal case, diaphragm actuated, black figures on white background, front calibration adjustment, 2 percent of full scale accuracy.

B. Inclined Manometer: Plastic with red liquid on white background with black figures, front calibration adjustment, 3 percent of full scale accuracy.

C. Accessories: Static pressure tips with compression fittings for bulkhead mounting, 6 mm diameter tubing.

8.7 FLEXIBLE CONNECTORS

A. Corrugated stainless steel hose with single layer of stainless steel exterior braiding, minimum 230 mm long; for maximum working pressure 1600 kPa. Threaded ends for sizes up to 50 mm diameter and flanged ends for sizes 65 mm diameter and larger.



8.8 PRESSURIZATION UNIT AND EXPANSION TANKS

A. Product Description: The unit shall comprise feed pumps, break tank, expansion tanks, control panel and accessories.

B. Pumps shall be centrifugal, closed coupled, end suction with cast iron body, bronze impeller, stainless steel shaft, mechanical seal, TEFC motor 2900 rpm. Two pumps shall be provided one duty and one standby.

C. Break tank shall be of GRP construction with cover, inlet connection with float valve, overflow connection, drain connection.

D. Expansion tanks: Welded steel construction, tested and stamped in accordance with ASME Section VIII; supplied with National Board Form U-1, rated for working pressure of 1600 kPa , with flexible EPDM diaphragm sealed into tank, and steel support stand with air charging fitting, pre-charged to 80 kPa.

E. Control panel: IP 65 construction, factory wired with main isolator, motor starters with overload, on-off switch, indicating lights for running and trip. Interface with the BMS as indicated on drawings and specifications. Furnish automatic relay to change sequence of duty/standby operation upon receiving a command to start. Pump no.1 shall start at the first command and pump no.2 shall start at the second command and so forth.

F. Furnish common base for pump, break tank and control panel of painted steel construction.

G. Accessories: Pressure gage, check valve, hi-low pressure switches, relief valve, automatic air vent and interconnecting pipe work.

H. Sizes and quantity of expansion tanks to be calculated by specialist manufacturer as per given data in equipment schedules and presented to the Engineer for approval.

8.9 AIR VENTS

A. Float Type: 1. Brass or semi-steel body, copper, polypropylene, or solid non-metallic float,

stainless steel valve and valve seat; suitable for system operating temperature and pressure; with isolating valve.

8.10 AIR AND DIRT SEPARATORS

A. In-line Air and Dirt Separators: Cylindrical micro bubble deaerator for removing air and dirt from closed type water circuits of cooling and heating. The unit shall have internal copper mesh to change turbulent flow into laminar flow. Body made of Brass for sizes 40 mm and smaller, or steel for sizes 50 mm and larger; tested and stamped for 1000 kPa operating pressure. Temperature range 0-100°C. Flow speed 0-2 m/s. Furnish automatic air vent of brass construction with non-shutoff valve fixed on top of unit. Furnish bottom



dirt collection chamber with bolted flange and flush valve. Furnish release valve for quick outlet of air during startup and skimming off floating scum during normal operation.

B. Inlet and outlet piping shall be rolled grooved ends for sizes 65mm and larger and screwed for smaller sizes.

8.11 STRAINERS

A. Size 50 mm and Smaller: 1. Screwed brass or iron body for 1600 kPa working pressure, Y pattern with 0.8

mm stainless steel perforated screen.

B. Size 65 mm to 100 mm : 1. Flanged iron body for 1600 kPa working pressure, Y pattern with 1.2 mm

stainless steel perforated screen.

C. Size 125 mm and Larger: 1. Flanged iron body for 1600 kPa working pressure, basket pattern with 3.2 mm

stainless steel perforated screen.

8.12 FLOW CONTROLS

A. Double Regulating Valve (DRV) < 50mm. Body shall be made of Bronze to BS1400LG2 and/or DZR to BS 5154 Alloy B, Double Regulating Valve shall have measuring points of self-sealed and Removable cap. Female threaded ends to BS 21 (ISO 7), DRV shall be of Y Pattern Globe Type with Characterized Throttling Disk. Memory Lock by Allen Key, Pressure Rated PN20 from -20°C to 120°C. Valve shall be selected so as to give ±6% accuracy (or better). Balancing procedure error should not exceed ±10% of the designed flow.

B. Double Regulating Valve (DRV) > 65mm. Body shall be Made of Cast Iron to BS2789 (EN-GJL-250) or of Ductile iron to BS 2789 Gr 500/7 (EN-GJS-450-10) , Double Regulating Valve shall have measuring points of self-sealed and Removable cap, Grooved ends to ISO 4200, DRV shall be of Y Pattern Globe Valve with Characterized Throttling Disk., Memory Lock by Allen Key. Pressure Rated PN16 from -20°C to 120°C . Valve shall be selected so as to give ±5% accuracy (or better). Balancing procedure error should not exceed ±10% of the designed flow.



8.13 RELIEF VALVES

A. Bronze body, Teflon seat, stainless steel stem and springs, automatic, direct pressure actuated capacities ASME certified and labeled.

PART 9 EXECUTION

9.1 INSTALLATION - THERMOMETERS AND GAGES

A. Install one pressure gage for each pump, locate taps before strainers and on suction and discharge of pump; pipe to gage.

B. Install gage taps in piping

C. Install pressure gages with pulsation dampers. Provide ball valve to isolate each gage. Install siphon on gages in steam systems. Extend nipples and siphons to allow clearance from insulation.

D. Install thermometers in piping systems in sockets in short couplings. Enlarge pipes smaller than 65 mm for installation of thermometer sockets. Allow clearance from insulation.

E. Install thermometers in air duct systems on flanges.

F. Install thermometer sockets adjacent to controls systems thermostat, transmitter, or sensor sockets. Where thermometers are provided on local panels, duct or pipe mounted thermometers are not required.

G. Locate duct-mounted thermometers minimum 3 m downstream of mixing-dampers, coils, or other devices causing air turbulence.

H. Coil and conceal excess capillary on remote element instruments.

I. Install static pressure gages to measure across filters and filter banks, (inlet to outlet). On multiple banks, provide manifold and single gage.

J. Provide instruments with scale ranges selected according to service with largest appropriate scale.

K. Install gages and thermometers in locations where they are easily read from normal operating level. Install vertical to 45 degrees off vertical.

L. Adjust gages and thermometers to final angle, clean windows and lenses, and calibrate to zero.

9.2 INSTALLATION - HYDRONIC PIPING SPECIALTIES

A. Locate test plugs as indicated on Drawings.



B. Where large air quantities accumulate, provide enlarged air collection standpipes.

C. Install manual air vents at system high points.

D. For automatic air vents in ceiling spaces or other concealed locations, install vent tubing to nearest drain.

E. Provide air separator at the inlet to chillers and outlet from boilers.

F. Provide drain and hose connection with valve on strainer blow down connection.

G. Support pump fittings with floor mounted pipe and flange supports.

H. Provide relief valves on pressure tanks, low-pressure side of reducing valves, heat exchangers, and expansion tanks.

I. Select system relief valve capacity greater than make-up pressure reducing valve capacity. Select equipment relief valve capacity to exceed rating of connected equipment.

J. Pipe relief valve outlet to nearest floor drain.

K. Where one line vents several relief valves, make cross sectional area equal to sum of individual vent areas.



SECTION 15125

PIPING EXPANSION COMPENSATION

PART 10 GENERAL

10.1 SUMMARY

A. Section Includes: 1. Flexible pipe connectors. 2. Expansion joints. 3. Pipe alignment guides. 4. Swivel joints. 5. Pipe anchors.

10.2 DESIGN REQUIREMENTS

A. Provide structural work and equipment required for expansion and contraction of piping. Verify anchors, guides, and expansion joints provide and adequately protect system.

B. Expansion Compensation Design Criteria: 1. Installation Temperature: 40 degrees C. 2. Heating Water: 90 degrees C. 3. Chilled Water: 7 degrees C.

10.3 SUBMITTALS

A. Shop Drawings: Indicate layout of piping systems, including flexible connectors, expansion joints, expansion compensators, loops, offsets and swing joints. Include shop drawing information for piping expansion compensation in shop drawings for piping systems.

B. Product Data: 1. Flexible Pipe Connectors: Indicate maximum temperature and pressure rating,

face-to-face length, live length, hose wall thickness, hose convolutions per meter and per assembly, fundamental frequency of assembly, braid structure, and total number of wires in braid.

2. Expansion Joints: Indicate maximum temperature and pressure rating, and maximum expansion compensation.

C. Samples: Submit two low-pressure compensators 50 mm in size.

D. Design Data: Indicate criteria and show calculations. Submit sizing methods calculations.

E. Manufacturer's Installation Instructions: Submit special procedures.

F. Manufacturer's Certificate: Certify products meet or exceed specified requirements.



G. Welders’ Certificate: Include welders’ certification of compliance with ASME Section IX.

H. Manufacturer’s Field Reports: Indicate results of inspection by manufacturer’s representative.


A. Project Record Documents: Record actual locations of flexible pipe connectors, expansion joints, anchors, and guides.

B. Operation and Maintenance Data: Submit adjustment instructions.


A. Accept expansion joints on site in factory packing with shipping bars and positioning devices intact. Inspect for damage.

B. Protect equipment from exposure by leaving factory coverings, pipe end protection, and packaging in place until installation.

PART 11 PRODUCTS

11.1 FLEXIBLE PIPE CONNECTORS

A. Steel Piping: 1. Inner Hose: Stainless Steel. 2. Exterior Sleeve: Double braided stainless steel. 3. Pressure Rating: 1600 kPa WOG and 121 degrees C. 4. Joint: As specified for pipe joints. 5. Maximum offset: 25 mm on each side of installed centerline.

11.2 EXPANSION JOINTS

A. Stainless Steel Bellows Type: 1. Pressure Rating: 1600kPa WOG and 121 degrees C. 2. Maximum Compression: 75 mm. 3. Maximum Extension: 6 mm. 4. Joint: As specified for pipe joints. 5. Application: Steel piping 80 mm and smaller.

B. Double Sphere, Flexible Compensators: 1. Body: Teflon. 2. Working Pressure: 1600 kPa 3. Maximum Temperature: 100 degrees C. 4. Maximum Compression: 28 mm.



5. Maximum Elongation: 22 mm. 6. Maximum Offset: 22 mm. 7. Maximum Angular Movement: 45 degrees. 8. Joint: Galvanized flanges for pipes 65 mm and larger, galvanized unions for

pipes 50 mm and smaller. 9. Accessories: Control rods. 10. Application: Steel piping 100mm and larger.

11.3 ACCESSORIES

A. Pipe Alignment Guides: Two piece welded steel with enamel paint, bolted, with spider to fit standard pipe, frame with four mounting holes, clearance for minimum 25 mm thick insulation, minimum 75 mm travel.

B. Swivel Joints: Ductile Iron body, double ball bearing race, field lubricated, with rubber o-ring seals.

C. Pipe Anchors: Furnish proprietary pipe anchors to take the expansion forces of the network. Submit calculations and details as per manufacturer's recommendation for the engineer's approval.

PART 12 EXECUTION

12.1 INSTALLATION

A. Install Work in accordance with ASME B31.1 ASME B31.5 ASME B31.9.

B. Install flexible pipe connectors on pipes connected to equipment supported by vibration isolation. Refer to Section 15070. Provide line size flexible connectors.

C. Install flexible connectors at right angles to displacement. Install one end immediately adjacent to isolated equipment and anchor other end. Install in horizontal plane unless indicated otherwise.

D. Rigidly anchor pipe to building structure. Provide pipe guides to direct movement only along axis of pipe. Erect piping so strain and weight is not on cast connections or apparatus.

E. Provide support and anchors for controlling expansion and contraction of piping. Provide loops, pipe offsets, and swing joints, or expansion joints where required. Refer to Section 15060 for pipe hanger installation requirements.

F. Provide grooved piping systems with minimum one joint per 25 mm pipe diameter instead of flexible connector supported by vibration isolation. Grooved piping systems need not be anchored.

G. Provide expansion loops as recommended by specialist manufacturer.



12.2 MANUFACTURER'S FIELD SERVICES

A. Furnish inspection services by flexible pipe manufacturer's representative for final installation and certify installation is in accordance with manufacturer's recommendations and connectors are performing satisfactorily.



SECTION 15130

HVAC PUMPS

PART 13 GENERAL

13.1 SUMMARY

A. Section Includes: 1. Base mounted pumps. 2. In-line circulators.

B. Related Sections: 1. Section 15070 - Mechanical Sound, Vibration, and Seismic Control: Product

requirements for vibrations isolators installed with pumps. 2. Section 15120 - Piping Specialties: Product and execution requirements for

piping specialties installed in hydronic systems adjacent to pumps. Note: For electrical requirements, refer to the electrical specifications under separate cover of the Contract Documents.

13.2 PERFORMANCE REQUIREMENTS

A. Provide pumps to operate at system fluid temperatures indicated on Drawings without vapor binding and cavitation, are non-overloading in parallel or individual operation, and operate within 25 percent of midpoint of published maximum efficiency curve.

13.3 SUBMITTALS

A. Product Data: Submit certified pump curves showing performance characteristics with pump and system operating point plotted. Include NPSH curve when applicable. Include electrical characteristics and connection requirements. Submit also, manufacturer model number, dimensions, service sizes, and finishes.

B. Manufacturer's Installation Instructions: Submit application, selection, and hookup configuration with pipe and accessory elevations. Submit hanging and support requirements and recommendations.

C. Manufacturer's Certificate: Certify products meet or exceed specified requirements.


A. Operation and Maintenance Data: Submit installation instructions, servicing requirements, assembly views, lubrication instructions, and replacement parts list.

B. Maintain one copy of each document on site.




A. Protect systems from entry of foreign materials by temporary covers, completing sections of the work, and isolating parts of completed system.


A. Verify field measurements prior to fabrication.

13.7 EXTRA MATERIALS

The cost of the following spare parts is deemed included with the pump item cost

A. Furnish one set of mechanical seals for each pump.

B. Furnish one set of motor bearings for each pump.

C. Furnish bronze casing wearing rings for each pump.

PART 14 PRODUCTS

14.1 BASE MOUNTED PUMPS

A. Type: Centrifugal, horizontal shaft, single stage volute, direct connected end suction single inlet, as shown on drawings and schedules for 1600 kPa maximum working pressure.

B. Casing: Close grained cast iron, with suction and discharge gage ports, renewable bronze casing wearing rings, seal flush connection, drain plug, flanged suction and discharge.

C. Impeller: Bronze, fully enclosed, keyed to shaft.

D. Bearings: Permanently lubricated roller or ball bearings.

E. Shaft: Stainless steel with bronze shaft sleeve.

F. Seal: Carbon rotating against stationary ceramic seat, 100 degrees C maximum continuous operating temperature.

G. Drive: Flexible coupling with coupling guard.

H. Baseplate: Cast iron or fabricated steel with integral drain rim.

I. Electrical Characteristics and Components: 1. Motors: 1450 rpm . Totally enclosed fan cooled, IP55. 2. Wiring Terminations: Furnish terminal lugs to match branch circuit conductor

quantities, sizes, and materials indicated. Enclose terminal lugs in terminal box sized to NFPA 70.



14.2 IN-LINE CIRCULATORS

A. Type: Horizontal shaft, single stage, direct connected, with resiliently mounted motor for in-line mounting, oil lubricated, for 1200 kPa maximum working pressure.

B. Casing: Cast iron, with flanged pump connections.

C. Impeller: Cast bronze, keyed to shaft.

D. Bearings: Two, oil lubricated bronze sleeves.

E. Shaft: Stainless steel with copper or bronze sleeve, integral thrust collar.

F. Seal: Carbon rotating against stationary ceramic seat, 100 degrees C maximum continuous operating temperature.

G. Drive: Closed coupling.

H. Electrical Characteristics and Components: 1. Motors: 1450 rpm . Totally enclosed fan cooled, IP55. 2. Wiring Terminations: Furnish terminal lugs to match branch circuit conductor

quantities, sizes, and materials indicated. Enclose terminal lugs in terminal box sized to NFPA 70.

PART 15 EXECUTION

15.1 INSTALLATION

A. Provide pumps to operate at specified system fluid temperatures without vapor binding and cavitations, are non-overloading in parallel or individual operation, and operate within 25 percent of midpoint of published maximum efficiency curve.

B. Install long radius reducing elbows or reducers between pump and piping. Support piping adjacent to pump so no weight is carried on pump casings. For base mounted pumps, install supports under elbows on pump suction and discharge line sizes 100 mm and over.

C. Install pumps on vibration isolators. Refer to Section 15070.

D. Install flexible connectors at or near pumps on suction and discharge pipes.

E. Provide line sized shut-off valve and strainer on pump suction, and line sized soft seat check valve and shut-off valve on pump discharge.



F. Decrease from line size with long radius reducing elbows or reducers. Support piping adjacent to pump so no weight is carried on pump casings. Provide supports under elbows on pump suction and discharge line sizes 100 mm and larger.

G. Provide drains for bases and seals.

H. Check, align, and certify alignment of base mounted pumps prior to start-up.

I. Install base mounted pumps on concrete housekeeping base, with anchor bolts, set and level, and grout in place.

J. Lubricate pumps before start-up.

Specifications for Variable

Refrigerant Volume (VRV III)

1. Select of the proper location of the outdoor and indoor units:

This unit, both indoor and outdoor, is suitable for installation in a commercial and light industrial environment. If installed as a household appliance it could cause electromagnetic interference. The VRV OUTDOOR units should be installed in a location that meets the following requirements: 1. The foundation is strong enough to support the weight of the unit and the floor is flat to

prevent vibration and noise generation. 2. The space around the unit is adequate for servicing and the minimum space for air inlet

and air outlet is available. . 3. Ensure that water cannot cause any damage to the location by dripping out of the unit,

such as from a blocked drain pipe. 4. The piping length between the outdoor unit and the indoor unit may not exceed the

allowable piping length. 5. Select the location of the unit in such a way that neither the discharged air nor the sound

generated by the unit disturbs anyone. 6. Make sure that the air inlet and outlet of the unit are not positioned towards the main

wind direction. Frontal wind disturbs the operation of the unit. If necessary, use a windscreen to block the wind.

• Heat resistance: Gas pipe : 250°F or more / Liquid pipe : 160°F or more

2. Inspecting and handling the units:

At delivery, the package should be checked and any damage should be reported immediately to the carrier claims agent. When handling the unit, take into account the following:

1. Fragile, handle the unit with care. Keep the unit upright in order to avoid compressor damage.

2. Choose the path along which the unit is to be brought in ahead of time. 3. If a forklift it to be used, pass the forklift arms through the large openings on the bottom of

the unit. 4. Lift the unit preferably with a crane and 2 belts of at least 27 ft. long. 5. When lifting the unit with a crane, always use protectors to prevent belt damage and pay

attention to the position of the unit’s center of gravity. 6. After installation, remove the transport clasps attached to the large openings. 7. Bring the unit as close to its final installation position in its original package to prevent

damage during transport.

3. Placing outdoor and indoor units. 4. install the refrigerant piping network as shown below: 1. The following materials should be used for all refrigerant piping: Materials: Deoxidized phosphorous seamless copper pipe or equivalent 2. The tips for insulation:

� Both Gas and liquid piping must be insulated. � Materials: Glass fiber or heat resistant polyethylene foam Thickness: 1/2 inch or more

UNDP - PAPP Building - Ramallah VRV III Technical Specifications September 2008

1

• Wrap the insulation pipe with the finishing tape from bottom to top.


2

3. Refnet joints: For gas and liquid branch pipes:


3

4. After completing installation, be sure to open the valve as operating the unit with the valve shut breaks the compressor.

.

• Use only R-410A from the solid pink cylinder. All field piping must be installed by a licensed refrigeration technician and must comply with relevant local and national regulations.

• USE CAUTION WHEN BRAZING REFRIGERANT PIPING do not use flux when brazing copper-to-copper refrigerant piping, particularly HFC refrigerant piping. Instead use phosphor copper brazing filler metal (B-Cu93P-710/795: ISO 3677) which does not require flux. Flux has an extremely negative effect on refrigerant piping systems and if chlorine-based flux is used, it causes pipe corrosion. Flux containing fluorine damages refrigerant oil.

• Installation tools: Make sure to use installation tools (gauge manifold charge hose, etc.) that are exclusively used for R-410A installations to withstand the pressure and to prevent foreign materials such as SUNISO mineral oils or moisture from mixing into the system. Screw thread and dimension specifications for flare nuts, service valves, and charging ports are different for R-410A than prior refrigerant types. Use a 2-stage vacuum pump with a non-return valve and make sure the pump oil does not flow back into the system while the pump is not working.

• After completing installation, be sure to open the valve. Operating the unit with the valve shut breaks the compressor.

• WHEN BRAZING REFRIGERANT PIPING: Do not use flux when brazing copper-to-copper refrigerant piping, particularly HFC refrigerant piping. Instead use phosphor copper brazing filler metal (B-Cu93P-710/795: ISO 3677) which does not require flux. Flux has an extremely negative effect on refrigerant piping systems and if chlorine-based flux is used, it causes pipe corrosion. Flux containing fluorine damages refrigerant oil.


4

5. connecting the refrigerant piping:

• The local branch piping can be connected either forward, or to the sides and through the bottom as shown in the following figure:

When multiple outdoor units are installed, an optional multi-piping kit is required to connect piping between units. Follow the installation manual’s instructions accompanying the kit. • Front connection: Remove the stop valve cover to connect. • Side (bottom) connection: Remove the knockout holes on the bottom frame and route the piping under the bottom frame.

6. Pressurize the liquid, suction gas, and discharge gas pipes to 551 psi (do not pressurize more than 551 psi). If the pressure does not drop within 24 hours, the system passes the test. If the pressure drops, check where the nitrogen leaks from

7. Vacuum drying: Use a vacuum pump that can evacuate to –14.6 psi.

• Evacuate the system from the liquid, suction gas, and discharge gas pipes by

using a vacuum pump for more than 2 hours and bring the system to –14.6 psi. After keeping the system under that condition for more than 1 hour, check if the vacuum gauge rises or not. If it rises, the system may either contain moisture inside or have leaks.

• if piping work is carried out during the rainy season or over a long period of time, rainwater may enter the pipe during work. Any possibility of moisture remaining inside the pipe requires the following action: After evacuating the system for 2 hours, pressurize the system to 7.25psi (vacuum break) with nitrogen gas and evacuate the system again using the vacuum pump for 1 hour


5

To –14.6 psi (vacuum drying). If the system cannot be evacuated to –14.6 psi within 2 hours, repeat the operation of vacuum break and vacuum drying. After leaving the system in vacuum for 1 hour, confirm that the vacuum gauge does not rise.

8. Additional Refrigerant Charge Procedure:

To learn the system settings for additional refrigerant charging, refer to the [Service Precaution] label attached on the back of the electric box lid in the outdoor unit.

• Fully open the suction gas line and discharge gas line stop valves. Be sure that the liquid line stop valve and valve A and valve B are left fully closed. and start the additional refrigerant charge operation.

• After the system is charged with a specified amount of refrigerant, press the confirmation button (BS3) on the PC-board (A1P) in the outdoor unit to stop the additional refrigerant charge operation.

• Immediately restore the stop valve to the following status. The test operation cannot be performed properly if the stop valve is not correct.

9. FIELD WIRING

All field wiring and components must be installed by a licensed electrician and must comply with relevant local and national regulations. Be sure to use a dedicated power circuit. Never use a power supply shared by another appliance.

• This product’s reversed-phase protection detector only works upon product startup and is designed to stop the product if an abnormality occurs.

• Replace two of the three phases (L1, L2, and L3) during reverse-phase protection circuit operation.

• Reversed-phase detection is not performed while the product is operating. • If a reversed phase occurs during a momentary blackout and the power goes

on and off while the product is operating, attach a local reversed-phase protection circuit. Running the product in reversed phase can break the compressor and other parts.

• Use copper conductors only. • For connection wiring to outdoor-outdoor transmission F1- F2, outdoor-

indoor transmission F1-F2, use copper wiring (2*1.5mm). • Refer to the Central Remote Controller’s Installation Manual for its

connection wiring. • Use insulated wire for the power cord.


6