BIỆN PHÁP (TC) KIỂM TRA VÀ CHẠY THỬ

MOS, Biện pháp TC, Biện pháp kiểm tra và chạy thử, Method of Statement of Testing and Commissioning in building, Cách kiểm tra và chạy thử các hệ thống trong tòa nhà cao tầng, văn phòng cao ốc, nhà máy, trung tâm thương mại

1. GENERAL

System shall be properly tested commissioned to ensure that all the equipment are supplying the designed capacity and installed that air and water flow rates are balanced in accordance with the design.

According to the clauses of section 23 (system testing, balancing andcommissioning) in technical specifications for MVAC system Testing andbalancing (TAB) to be set to work

After initial installing and checking for assuming statics factory the designsystematically follow the steps to be listed as bellow:

3.1 AIR SYSTEM TAB PROCEDURES

be set for a full flow cooling condition

 Flow/ Pressure Check

Confirm that all related system fans serving each area within the space beingbalanced are operating If they are not, pressure differences and infiltration orex-filtration may adversely influence the balancing Positive and negativepressure zones should be identified at this time

 Damper Setting

If a supply fan is connected to a return air system and an outside air intake, setall system dampers and controls so that the air returned from the individualrooms or areas supplied by the fan is returned via the related return air system

MOS FOR TESTING COMMISSIONING

CONTENTS:

3.1 Air system TAB procedures

3.2 Process Exhaust Air Systems

3.3 Hydronic system TAB procedures (3.3)

3.4 Specific air system TAB procedures

3.5 Refer the clauses 23.2.7 of electrical test in technical

specification MVAC system

Normally this will involve opening and outside air damper to the minimumposition, opening the return air damper, and closing exhaust air and relief airdampers (If the supply system is associated with a run air system and/ or anindependent exhaust system, make sure all systems are operating and allrelated dampers are set properly for the TAB work.)

3.1.2.Fan Testing

Perform the following tests adjustments prior to beginning the air balancing

- Record nameplate data on fan, motor sheave indicating number and size ofbelts along with center to center distances

- Test and record actual operating fan rpm

- Measure and record actual running amperage

be recorded

With rpm, brake power and static pressure, the fan manufacturer’s data sheetsmay be used to determine the airflow predicted by the manufacturer Fanperformance can deviate from the fan curves, if system effect or other systeminstallation defects are present

 Fan Adjustment

If there are no obvious deficiencies and the airflow is high, the fan can beslowed by adjusting the drives or making drive changes When the airflow islow, the fan speed should be increased First determine if there is adequate fanmotor capacity available The new airflow-fan power relationship can bedetermined by use of the fan laws

 Fan Drive Changes

When new HAVC systems do not perform as designed, new drives and motorare often required The financial responsibility for these items do not belong to

the TAB technician, but the balancing readings will have a lot to do withdetermining responsibility Be sure included the necessary data together withexplanations about how and where the readings were taken The above stepsshould also be used for any return air or exhaust air fan associated with theHVAC system in question.

 Fan Amperage

Always recheck the amperage whenever any rpm change or major dampersetting change is made

 Fan Static Pressures

Subsequent to the adjustments of the fan and obtaining the desired air flow,static pressure readings should be taken at the fan suction and fan discharge toobtain the current total static pressure reading This data along with the actualrunning amperage should be recorded

Many fan rooms are also return air to outside air plenums When takingreadings in these rooms, it will be necessary to reference the manometer oranemometer to the atmosphere This is accomplished by running a length ofhose from the opposite port of the instrument to the outside or atmosphere.Take advantage of existing possible openings available for static pressure (SP)reading such as access doors, handles, bolt holes … that may be removed toget the SP probe into the air stream If none are available, new ones will have

to be drilled Be sure to close or cap them when finished

3.1.3 Deficiency Review

If the fan volume is not within specified range of the design capacity, determinethe reason by reviewing all system conditions, procedures and record data.Check and record the air pressure drop across filters, coils, eliminator, soundtraps, etc to see if excessive loss is occurring Particularly study duct andcasing conditions at the fan inlet and out let for system effect

3.1.4 Return And Outside Air Settings

If the fan system you are adjusting has return and outside components and nodedicated return, exhaust or spill air fan it will be necessary to adjust associatedampers achieve the proper air flow for each

With the supply fan being set up to the proper air flow as described above it will

be essential to take total air readings for the return, outside air, and spill airprocess of the system Total air readings may be taken by:

1 Duct traverse readings

2 Compilation of individual air inlet readings

3 By mathematical calculation from previously taken readings (supply minusreturn equal outside air).

4 By temperature calculations involving supply air temperature, return airtemperature, mixed air temperature, and outside air temperature

If volume dampers are provided for each component of the system they should

be used for balancing If dampers are not provided it may be necessary tocoordinate with the control contactor to limit the stroke or adjustment of theautomatically operated damper

Upon completion of the above, it is required to check the supply air reading tosee if these adjustments adversely affected the total air of the system If theadjustments were severe enough to cause a considerable change in total airflow, all of the above steps must be repeated until proper supply, return,outside, exhaust, and spill air quantities are achieved

After proper air quantities have been achieved in the minimum outside air mode

of operation it will be necessary to check the 100% outside air mode ofoperation The automatic dampers should be indexed to the 100% OA Mode ofoperation and the operating amperage; static pressure should be checked tosee if substantial deviations occur in total performance If air flow is increasedadjust the volume damper for the outside air or restrict the operation of theautomatically operation damper

If the air flow substantially decreased it may be necessary to review the system

to determine if the 100% OA Mode of operation is the mode with the highestsystem pressure drop If this is the case the previous readings will have to betaken over in the reverse order and the AC unit adjusted accordingly In orderwords, the system would be set up for 100% OA and then checked forminimum OA operation with adjustments being made in the minimum mode

3.1.5 Proportional Balancing (Ratio) Method

 Farthest Branch

Select the supply air duct branch farthest from the fan All terminal units oroutlets should be numbered on a schematic drawing

 Branch Duct Readings

Preferable using a direct reading flow hood, record the measured airflow Qm

from each of the terminal outlets on the selected branch duct

3.1.6 Percentage Of Design Airflow

Calculate the percentage (X%) of design airflow Qd for each outlet (Qm/Qd=X

100 100 100 100 100 100

150 160 170 180 200 210

75 80 85 90 100 105

 First Step

The branch damper for outlet number 6, the lowest percentage of design, is notadjusted The damper for outlet number 9, the next lowest percentage ofdesign, is adjusted until the airflow volume decreases to about 155cfm (77 L/s).Outlet number 6 airflow volume should then come up to about 155cfm (77 L/s).This should be verified by measurement, and these two outlets (6 and 9)should be in balance

 Second Step

Outlet number 5, which is the next lowest percentage of design, is adjusteddown to about 160 cfm (80 L/s) Outlet number 6 and 9 should then come up tonear 160 cfm (80 L/s) and number 9 should be measured to verify this Outletnumbers 6, 9 and 5 should all be basically in balance.

 Next Step

This procedure is followed, proportionally balancing the next highest percentage of design outlet to the previous one balanced This should bring all outlets balanced earlier into balance with it.

 Second Branch

Using Figure 13-5, the three (3) outlets numbered 1 to 3 would be proportionalbalanced to each other in the same manner The two branches then could beproportional balanced using the same procedures used with the terminals

 Varying Airflows

If a branch duct has outlets with varying airflows, the percentage of design is calculated for each and same procedures are used, balancing to the

percentage of design airflow for each

 Completion

Upon completion of proportional balancing of all out-lets and branches, recheck

the supply air fan capacity to the final Q m/Qd percentage If measured airflow(Qm) is lower than design airflow (Qd), the fan airflow volume must be increased

to the design airflow (Qd) and all outlets should increase proportionally to theirdesign airflow (Qd)

Continue the TAB work by following steps for the stepwise Method

3.1.7 Fan Adjustment

Verify the fan capacity and operating conditions again and make a finaladjustment to the fan drive, if necessary

3.1.8 Wet Coil Conditions

If the supply system was tested with dry coil surfaces and is designed fordehumidification, the total air quantity should be rechecked under wet coilconditions

3.1.9 Airflow Totals

After testing and recording all for the terminal units, total the readings on azone or branch basis Compare the totals to the comparable zone duct traversereading and the required airflow The total airflow for the terminal units should

be close to the traverse reading for the zone or branch The terminal unit totalusually will be a little lower due to allowable duct leakage The accuracy of agood Pitot tube traverse is usually considerably better most terminal readings

If significant variations are found between traverse reading and time readings,further investigation of ducts may be required

Using the methods outlined above, determine the volume of air being handled

by a return air fan If used and/or if a central exhaust fan system is used Alsodetermine the airflow being handled by the exhaust fan If several exhaust fans,such as power roof ventilators are related to a particular supply air system, it

generally is not necessary to measure the airflow of each such exhaust fan untilafter the supply air system is balanced.

If the measured airflow of the supply air fan, central return air fan or centralexhaust air fan varies more than the specified design plus allowable leakageadjust the drive of each fan to obtain the approximate required airflow Recordthe fan suction static pressure fan discharge static pressure, amperage and airvolume measurements Confirm that the fan motor is not over loaded

After balancing the return air system and the associated supply air system, thereturn air damper should be closed: the relief air dampers should be 100percent open and return air fan, if used, static pressure and system airflowshould be checked again If it is necessary to increase the system staticpressure and thereby reduce the fan airflow, adjust the exhaust the exhaust airdamper to a maximum position less than 100 percent open Recheck thesupply fan airflow with the outside air damper in the full open position

Check-Out procedure

The following check-out procedure may be used on systems which weredesigned to balance without the aid of blast gates It is intended as an initialcheck on the design computations and contractor’s construction in new system,but it may be used also for existing systems when design calculations areavailable can be recomputed It does not detect poor choices of design criteriasuch as low conveying or capture velocities and consequently will not revealinadequate control due to this type of error Agreement with design within ±10%

is considered acceptable

a Measure flow in duct on inlet side of fan with a Pilot traverse If flow is too low,proceed to step 1.a; if correct, go to step d

1 Check fan size against plan

2 Check fan speed and direction of rotation against design

3 Check fan inlet and outlet configuration against plan

b If a discrepancy is found and corrected, return to step a if not, measure faninlet and outlet static pressures and compute the fan static pressure, and l/s If

agreement is acceptable although at some other operating point than specified,fan is satisfactory and trouble is elsewhere in system Proceed to step c.

c If fan inlet static pressure is greater (more negative) than calculated in design,

proceed to step d If fan outlet static pressure is greater (more positive) thandesign, proceed to step h

d Measure hood static pressure on each hood and check against design If toohigh on any hood, proceed to step e, if too low, go to step f If correct, go tostep j

e After all hood construction errors and obstructions have been corrected, if hoodstatic pressures are correct, return to step a; if too low, proceed to step f

f Measure static pressure at various junctions in ducts and compare with designcalculations If too high at a junction, proceed upstream until static pressuresare too low and isolate the trouble In an area where losses exceed design:

1 Check angle of entries to junctions against plan

2 Check radius of elbows against plan

3 Check duct diameters against plan

4 Check duct for obstruction

g After correcting all construction details which deviate from specifications, return

to No.1

h Measure pressure differential across air cleaning device and check againstmanufacture’s data If loss excessive, make necessary corrections and return

to step a If loss is less than anticipated, proceed to step h.1

i If errors are found, correct and return to step a If no errors can be detected,recheck design against plan, recalculate and return to step a with newexpected design parameters

j Measure control velocities at all hoods where possible If control is inadequate,redesign of modify hood

k The above process should be repeated until all defects are corrected and thehood static pressures and control velocities are in reasonable agreement withdesign The actual hood static pressure should then be recorded for use inperiodic system checks A file should be prepared containing the followingdocuments:

1 System plan

2 Design calculation

3 Fan rating table

4 Hood static pressures after check-out

5 Maintenance schedule

6 Hood static pressures measurement log

7 Periodic maintenance log

The following equipment will be adequate to perform the tests required for thischeck-out procedure:

a Pitot tubes-various lengths

b Pressure gages-inclined manometer or Magnehelic

c Rotational speed measuring device-revolution counter or stroboscope

d Air velocity meter-low range (Velometer or thermal anemometer)

e Diameter tape

3.2 PROCESS EXHAUST AIR SYSTEMS

 Kitchen Exhaust Air System

- Test Instruments

Kitchen makeup air systems must be in operation when the balancing takesplace Sometimes make-up is achieved by means of relief grilles from adjoiningareas The thermal anemometer is a good instrument for measuring these lowface velocities Some swinging vane anemometers (Velometer) can be used atvelocities under 100 fpm (0.5m/s) using the low flow probe A Pitot tube usedwith a micro-manometer also can be used When making a Pitot tube traverse

of the duct from the hood, be sure to correct for air density if elevatedtemperatures are present or predicted

- Ducts

Most kitchen hood exhaust ducts are made of heavy gage metal, and arecovered with a thick fire resistant insulation A Pitot tube traverse of the duct isthe most accurate way to test holes will need to be plugged with moisture tight,fire resistant metal plugs or caps, and often, holes are not allowed Avoidputting holes in the bottom of the duct where moisture or grease canaccumulate and/or leak out If possible, put the test holes in the side of a riser.Never use plastic or rubber test plugs in a kitchen exhaust duct Also, be awarethat even if the correct airflow is obtained by the Pitot tube traverse, the hoodface velocity may not be sufficient to satisfy local ordinances In this casespeed up the fan if the system designer approves and the fan/drivecomponents can accommodate the increase

- Filters

Velocity reading across grease filters are not usually reliable Accurate freearea correction data is not usually available and it would be influenced by thecondition of the filters

3.3 HYDRONIC SYSTEM TAB PROCEDURES

3.3.1 Hydronic System Measurement Methods

3.3.1.1. Basic hydronic system procedures

Procedures outlined the preparation work that must be done prior to the actualtesting, adjusting and balancing of the HVAC systems Confirm that thesepreliminary procedures have been completed and check list prepared Do notattempt to balance a hydronic system before the installation has beencompleted and all of the air systems have been balanced

Verify that all hydronic systems have been cleaned, flushed, refilled, andvented, as required

Record the operating voltage and amperage of the pump(s) and compare thesewith nameplate ratings and thermal overload heater ratings Verify the speed ofeach pump

- Flow Measurements

If flow meters or calibrated balancing valves are installed, which would allowthe flow rate of the pump circuit(s) to be measured, perform the necessary workand record the data

With the pump(s) running, slowly close the balancing cock fully in the pumpdischarge piping and record the shutoff-discharge and suction pressures found

at the pump gage connections Do not fully close any valves in the dischargepiping of a positive displacement pump Severe damage may occur

Using pump shut-off head, determine and verify each actual pump operatingcurve and the size of each impeller Compare this data with the submittal datacurves If the test point falls on the design curve, proceed to the next step; ifnot, plot a new curve parallel to the other curve on the chart, from zero flow tomaximum flow Make sure the test reading were taken correctly before plotting

a new curve Preferably one gage should be used to read differential pressure

It is important that gage reading should be corrected to the center line elevation

of the pump

3.3.1.3 System Flow

Open the discharge balancing cock slowly to the fully open position; record thedischarge pressure, suction pressure and total head Using the total head, readthe system water flow from the corrected pump curve established

3.3.1.4 Pump Flow Adjustments

If the total head is higher than the design total head, the water flow will be lowerthan designed If the total head is less than design, water flow will be greater Ifgreater, the pump discharge pressure should be increased by partially closingthe balancing cock until the system water flow is approximately 110 percent ofdesign Record the pressures and the water flow Check pump motor, voltage,and amperage and record This data should still be within the motor nameplateratings Start any secondary system pumps and readjust the balancing cock inthe primary circuit pump discharge piping, if necessary Again record allreadings

3.3.1.5 Initial system Adjustments

An initial recording of the flow distribution throughout the system should bemade without making any adjustments, after studying the system, adjust thedistribution branches or risers to achieve balanced circuits as outline above.Vent air from low flow circuits Then proceed with the balancing of terminalunits on each branch

3.3.1.6 Equipment Pressure Drops

Before adjusting any balancing valves at equipment, take a complete set ofpressure drop readings through all equipment and compare this withsubmittal data readings Determine which are high and which are low inwater flow Vent air from low flow circuits or units and retake readings

3.3.1.9 High Flow Units

Make another adjustment to the balancing valves on all units which havereadings more than 10 percent above design flow in order to increase theflow through those units with less than design flow

Where three-way automatic valves are used, set all bypass line balancingvalves to restrict the bypassed water to 90 percent of the maximum demandthrough coils, heat exchangers and other terminal units

After all TAB work has been completed and the systems are operatingwithin plus or minus 10 percent of design flow, mark or score all balancingvalves, gages, and thermometers at final set points and/or range ofoperation

3.3.2 Balancing Specific System

3.3.2.1 Chiller and Hot Water Equipment

- Equipment Pressures Differences

Flow through chiller, HVAC unit coils, and heat exchangers should bemeasured by using flow meters or calibrated balancing valves if installed.Otherwise use the equipment manufacturer’s certified pressure drop table andcurves or use the pressure drop characteristics of automatic control valves Ifthree-way control valves are used, measure the pressure difference with fullflow both through the coil or unit and the bypass

Set the bypass line balancing cook to maintain a constant pressure with thecontrol valves in either position

- Unit Measurements

When fan-coil units or induction units are used with a direct return pipingsystem, flow measurements for each unit should be made, either by usingcalibrated balancing valves, by taking pressure across each automatic watervalves, or (as a last resort) from water or air temperature readings

- Reverse Returns

When a reverse return piping system is installed, a flow measurement should

be made at each set of risers to make sure that all units are getting the waterflow to provide a fairly uniform water temperature drop All automatic watervalves must be open and coils must have the rated airflow whenmeasurements are being made

- Temperature Differences

After all of the fan-coil type units have been put into operation with all automaticvalves fully open and full flow through the coils, take the entering and leavingwater temperatures of all chillers, boilers, heat exchangers and coils Recordand compare with design conditions

- Coils

When units or systems have multiple coil sections adjust the water flow to thedesign water pressure drop across each coil A less accurate method ofbalancing multiple coil sections involves reading the water temperature at eachcoil section with insertion thermometers and adjusting the balancing valves untiluniform temperatures are obtained

- Complete the TAB procedures by recording the ?quired data on TAB reportforms (Chapter 16) for submittal

3.3.2.2 Cooling Tower Systems

- Tower Conditions

- With the system off, confirm that the water level in the tower basin is at thecorrect level and that the piping system has been cleaned and flushed Ontower with variable pitch fan blades, verify that the setting of the blades iscorrect for the test conditions Verify that all dampers are open and that all fanmotors are ready to operate

Record the speed of each pump and verify with submittals

- Zero Flow Readings

With the pump(s) running, slowly close the balancing cock in each pumpdischarge line and record should discharge and suction pressures at the pumpgage connections Do not use this method if a positive displacement Pump(s) isused Using the shutoff head, determine (and verify) the actual pump operatingcurve and the size of each impeller Compare this data with the submittal datacurves If the test point falls on the design curve, proceed to the next step; ifnot, plot a new curves on the chart, from zero flow to maximum flow Make surethe test reading were taken correctly before plotting a new curve Preferably asingle gage should be used to read differential pressure It is important thatgage readings be corrected to center line elevation of the pump

- Tower Water Flow

Establish a uniform water distribution within the tower where possible, andcheck for clogged outlets or spray nozzles Check for vortex conditions at thetower condenser water suction connection

When a three-way control valve is used in the condenser water piping at thetower, measure the pressure difference with full water flow going both throughthe tower and/or through the bypass line Set the bypass line balancing cock tomaintain a constant pressure at the pump discharge with the control valve ineither position.

Take inlet air temperature readings between 3 and 5 feet (0.9 and 1.5m) fromthe tower at all inlets These readings shall be taken halfway between the baseand the top of the inlet and then averaged

- Condenser Controls

After setting the three-way control valve (to control head pressure) in thecondenser water line (step 15.4.2.9) verify record that it operates to maintainthe correct head pressure by varying the flow at the tower On units that have afan cycling control, verify that the fan cycles to maintain design condenserwater temperature If fan inlet or outlet damper controls are used, verify that thedampers modulate to maintain the design condenser water temperature leavingthe tower

- Pump Adjustments

Make another complete set of pressure, voltage and ampere readings at thepump(s) If the pump(s) capacity has fallen below design flow, open thebalancing cook(s) at the pump discharge to bring flow within 5 to 10 percent ofthe design reading, if possible

- Final Measurements

Make final measurements of all pump, fan and equipment data, and record onthe TAB report forms.

- Operating Ranges

After all balancing work has been completed and the system is operatingwithin plus or minus 10 percent of design flow, mark or score all balancingvalves, gages, and thermometers at final set points and/or range of operation

- Safety Controls

Verify the action of all water flow safety and shutdown controls

3.4 Refer the clauses 23.2.7 of electrical test in technical

specification MVAC system

 Shortridge Air test and balance kit

 Alnor Air test and balance kit

 Kimo Micro manometer and pitot tubes

 TA CBI water TAB kit

 Pluke 971 Temperature and psychrometer

 Pulsar Digital sound meter

 Kyoritsu Insulation tester

 Kyoritsu Clamp meter

 Rotating vaneanomometer

 Tachometers

 Mercury in glass thermometer

( The above instruments to be added pictures later)

The following is a brief explanation of the use of each report form and of any entries which may not be self-explanatory The TAB Report Forms are designed for multiple use, therefore it is not necessary to enter data in all blank spaces or at each designated item

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Tel: 84.8-8662036 - 8662 038 Fax : 84.8-8662035

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No Belts/Make/Size

No Filters/Type/Size

TEST DATA DESIGN ACTUAL TEST DATA DESIGN ACTUAL

Cooling Coil ∆.S.P.

Outside Air CFM (L/s)

Return Air CFM (L/s)

Vortex Damp.Position

Out Air Damp.Position

Remarks:

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www.huunghiengineering.vn

Head office: 319-B13 Thuan Viet Trade Center, Ly Thuong Kiet Str, Ward.15, Dist.11, HCMC, VN

Tel: 84.8-8662036 - 8662 038 Fax : 84.8-8662035

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Refrig Suction Press.

Refrig Suction Temp.

Inlet Steam Press.

HUUNGHI ENGINEERING CORPORATION

www.huunghiengineering.vn

Head office: 319-B13 Thuan Viet Trade Center, Ly Thuong Kiet Str, Ward.15, Dist.11, HCMC, VN

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Motor Shaeve Make

Motor Shaeve Diam./Bore

No Belts/Make/Size

Sheave Distance

TEST DATA DESIGN ACTUAL DESIGN ACTUAL DESIGN ACTUAL DESIGN ACTUAL

Q (L/s)

HUUNGHI ENGINEERING CORPORATION

www.huunghiengineering.vn

Head office: 319-B13 Thuan Viet Trade Center, Ly Thuong Kiet Str, Ward.15, Dist.11, HCMC, VN

Branch office: 4th Floor 465 Nguyen Trai Str., Thanh Xuan Nam Ward., Thanh Xuan Dist, Hanoi

7 8 9 10 11 12 13 VELOCITY SUB-TOTALS

Note: Take readings with air blowing toward the observer

Remarks:

HUUNGHI ENGINEERING CORPORATION

www.huunghiengineering.vn

Head office: 319-B13 Thuan Viet Trade Center, Ly Thuong Kiet Str, Ward.15, Dist.11, HCMC, VN

Tel: 84.8-8662036 - 8662 038 Fax : 84.8-8662035

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Page - of

INSTRUCTIONS

METHOD No.1 (EQUAL AREA)

To determine the averege air velocity in square or rectangular ducts, a Pitot tube traverse must be made to measure the velociries at the center points

of equal areas over the cross section of the duct The number of equal areas should not be less than 15, but need not be more than 64 The maximum distance between center points, for less than 64 readings Should not be more than 6inches (150mm) The readings closest to the ductwalls should be taken at one-haft of this distance For maximum accuracy, the velocity correcsponding to each velocity pressure measured must be

HUUNGHI ENGINEERING CORPORATION

www.huunghiengineering.vn

Head office: 319-B13 Thuan Viet Trade Center, Ly Thuong Kiet Str, Ward.15, Dist.11, HCMC, VN

Tel: 84.8-8662036 - 8662 038 Fax : 84.8-8662035

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Page - of

ROUND DUCT

TRAVERSE REPORT

S.P Air Temp (oC)

TEST DATE READINGS BY

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NO TYPE SIZE AK VEL FLOW VEL FLOW VEL FLOW

Remarks:

Test date Readings by

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NO TYPE SIZE AIR FLOW

(L/s)

AIR FLOW (L/

s)

AIR FLOW (L/s)

Remarks:

Test date Readings by

HUUNGHI ENGINEERING CORPORATION

www.huunghiengineering.vn

Head office: 319-B13 Thuan Viet Trade Center, Ly Thuong Kiet Str, Ward.15, Dist.11, HCMC, VN

Tel: 84.8-8662036 - 8662 038 Fax : 84.8-8662035

Branch office: 4th Floor 465 Nguyen Trai Str., Thanh Xuan Nam Ward., Thanh Xuan Dist, Hanoi

Manuf

Sheave Distance

No Belts/Make/Size

Test date readings by

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Page - of

BALANCING VALVE/FLOW

METER TEST REPORT

ACTUAL VALVE P.D.

ACTUAL (L/s) NOTES