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Data Aire DAPA-2.5 Скачать руководство пользователя страница 49

49

Table 12 Liquid Line Multiplier for

R-410A

at Various Line Lengths

Liquid Line

Nominal Size

(inches)

Liquid Line

Size OD

(inches)

Multiplier

Equivalent Feet (Meters)

50

100

150

200

(15.2)

(30.5)

(45.7)

(61.0)

3/8

1/2

0.067

3.35

6.71

10.06

13.41

1/2

5/8

0.108

5.38

10.76

16.13

21.51

5/8

3/4

0.154

7.70

15.40

23.10

30.80

3/4

7/8

0.239

11.95

23.90

35.85

47.80

1

1 1/8

0.380

19.02

38.04

57.06

76.08

Table 13 Liquid Line Multiplier for

R-407C

at Various Line Lengths

Liquid Line

Nominal Size

(inches)

Liquid Line

Size OD

(inches)

Multiplier

Equivalent Feet (Meters)

50

100

150

200

(15.2)

(30.5)

(45.7)

(61.0)

3/8

1/2

0.072

3.58

7.17

10.75

14.33

1/2

5/8

0.115

5.75

11.49

17.24

22.99

5/8

3/4

0.165

8.23

16.46

24.69

32.92

3/4

7/8

0.255

12.77

25.54

38.31

51.08

1

1 1/8

0.407

20.33

40.65

60.98

81.31

Component Functional Test

Critical components can be functionally verified by using the manual mode of the Mini-dap4. See Mini-
dap4 User Manual for details regarding how to use Menu I

– Manual Control (Service Level).

Charging Procedures

WARNING:

If the system is charged from a vacuum, the preheating of the

compressor  is  not  necessary.  But  if  starting a  compressor  that  has  not
been charged from a vacuum, the crankcase heater must be energized
for a minimum of 12 hours to reduce the possibility of liquid slugging on
startup.  Failure  to  energize  the  crankcase  heater  could  result  in
compressor damage.

NOTICE

Prior to refrigerant charging, the proper tools and/or equipment must

be available, and the system vacuum and moisture removal procedure must
have been carried out. Refer to Section

5.2 Charging/Installation

and

5.3 Triple Evacuation and Dehydration Procedure

prior to

charging the system.

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Содержание DAPA-2.5

Страница 1: ......

Страница 2: ...ground in areas such as HVAC electrical plumbing and electronics as applicable WARNING Service performed by unauthorized or unqualified technicians may void manufacturers warranties and could result i...

Страница 3: ...ischarge Lines 18 Liquid Lines 20 Suction Lines 20 Recommended Line Sizing 20 Hot Gas Lines 21 Liquid Lines 21 Suction Lines 21 Connection Sizes Air Cooled Units 22 Connection Sizes Water Glycol Coole...

Страница 4: ...tion 45 Third Stage Evacuation 45 Final Evacuation Stage 46 General Pre Charging Guidelines 46 Voltage Phase Check 47 Evaporator Power Phase Check 47 Fixed Speed Scroll Compressor Phase Check 47 Heat...

Страница 5: ...E ITEMS 67 Air Filters 67 Belts 67 Bearings 67 Fuses 68 Electric Reheat 68 Humidifier 68 Humidifier Canisters 68 Refrigerant Filter Drier 68 EC Plenum Plug Fans 69 Electronically Commutated Motors 69...

Страница 6: ...Line Multiplier 48 Table 12 Liquid Line Multiplier for R 410A at Various Line Lengths 49 Table 13 Liquid Line Multiplier for R 407C at Various Line Lengths 49 Table 14 DAPA Starting Charge R 410A 51...

Страница 7: ...o the unit must be no cooler than the ASHRAE recommendation for proper unit operation Operating below this can alter the operating performance and decrease equipment reliability Refer to ASHRAE s publ...

Страница 8: ...etails NOTICE Any external damage or transportation damage on the freight carrier s forms Inspect the unit itself for internal damage A claim should be filed with the shipping company if the equipment...

Страница 9: ...owing the condition of the unit and noting any discrepancies A copy of the log sheet should be sent to Data Aire Failure to perform the long term storage requirements may void the warranty CAUTION A c...

Страница 10: ...sources Isolate from direct sun light Isolate from storage of hazardous materials and substances Refrigerant coils have been evacuated and pre charged with slight 1 to 3 PSIG 6 9 to 20 7 kPa nitrogen...

Страница 11: ...raining that will enable them to perform their assigned tasks properly and safely It is essential that prior to performing any task on this equipment this individual shall have read and understood thi...

Страница 12: ...et jacks If using a forklift or pallet jack make sure that the forks if adjustable are spread to the widest allowable distance that will fit under the skid Ensure the fork length is suitable for the u...

Страница 13: ...of polyethylene is often used on walls and ceilings Walls and floors must also be painted with vapor seal paint All doors to the controlled space should be equipped with weather seals to prevent the...

Страница 14: ...safe distance from the unit The unit may be too tall to fit through a doorway while on the skid Measure the unit and doorway heights and refer to the installation plans to verify clearances prior to m...

Страница 15: ...igure 1 Typical Installation Methods for typical DAP installation method Raise the evaporator section with an appropriate lifting device Attach washers nuts and jam nuts to each threaded rod Tighten t...

Страница 16: ...Typical Installation Methods NOTES 1 The unit must be level when installation is complete 2 Add an additional 4 1 2 for an Energy Saver or Auxiliary Chilled Water coil option Figure 2 Typical Installa...

Страница 17: ...to these units as well These remote outdoor condenser or condensing units outdoor sections have their own installation operation and maintenance manuals Piping All refrigerant piping should be is Type...

Страница 18: ...ne above the other Ensure that the tubing surfaces to be brazed are clean and that all burrs have been removed from the ends of the tubes Ensure that all loose material has been cleaned from inside th...

Страница 19: ...prevent flow from the condenser to the compressor during the off cycle The evaporator section ships with a nitrogen holding charge Do not vent the evaporator until all refrigerant piping is in place r...

Страница 20: ...e is determined by pressure drop and velocity The liquid line pressure drop should not exceed 9 PSI 62 kPa for R 410A and 5 PSI 35 kPa for R 407C The recommended liquid velocity should be between 200...

Страница 21: ...8 1 2 1 2 1 2 3 1 2 1 2 5 8 5 8 4 1 2 1 2 5 8 5 8 5 1 2 5 8 5 8 5 8 Suction Lines Table 4 Suction Lines Inches OD Unit Tonnage Equivalent Feet Meters 50 15 2 100 30 5 150 45 7 200 61 0 Horizontal Ver...

Страница 22: ...y be the same as the field pipe size required In some cases these sizes will vary significantly Connection Sizes Water Glycol Cooled Units Table 6 Connection Sizes Water Glycol Cooled Units Inches OD...

Страница 23: ...e check valves are included internally in the evaporator section 4 Slope horizontal lines downward in the direction of the refrigerant flow 1 2 13 mm for every 10 feet 3 1 meters of line length 5 Inve...

Страница 24: ...All piping to be per local and or state code 2 Condenser to be no more than 15 feet 4 6 M below evaporator 3 Slope horizontal lines downward in the direction of the refrigerant flow 1 2 13 mm for eve...

Страница 25: ...ooling the fluid should be avoided NOTE Every application will have a different ambient temperature and indoor heat load air distribution profile Therefore it is not possible to dictate the exact wate...

Страница 26: ...sate drain piping from the unit for cleaning 5 Drain lines should be pitched downward not less than 1 4 6 35 mm for each ten 10 feet 3 1 M of horizontal run 6 Where local codes permit PVC pipe may be...

Страница 27: ...ater supply to the humidifier Improper installation application and service may result in water leakage from the unit Water leakage can result in severe property damage and loss of critical data cente...

Страница 28: ...2 Some applications have no convenient means of allowing a gravity drain In this case a condensate pump can be used These come either factory mounted or shipped loose 3 Factory mounted condensate pump...

Страница 29: ...r plenum 2 The suction line of the pump needs to be lower than the drain line of the unit L1 Minimum 1 25 4 mm L2 Fan static pressure x 1 5 3 Bracket Data Aire P N 550 021 006 to be mounted to the uni...

Страница 30: ...sion valves etc If the ambient temperature surrounding the piping system increases this may cause the contained refrigerant pressure to increase to an unacceptable level WARNING This increased pressur...

Страница 31: ...drop of peripheral components Shutoff valves field provided should be installed within a few feet of the inlet and outlet connections of the evaporator to allow the unit to be isolated for service Dra...

Страница 32: ...s a required component of a proper system installation The tank can be provided by Data Aire or by others 2 All Water Glycol field piping must be designed and installed in accordance with ASHRAE stand...

Страница 33: ...r WARNING With any fluid connection there is risk of leakage Water leakage could result in property damage to mission critical equipment A water drain connection is required Units with optional steam...

Страница 34: ...tment Contact Data Aire Service Department for details The commissioning includes pre startup inspections of installed components subsystems and systems and the execution of the verification and funct...

Страница 35: ...nsed and qualified electrician Risk of electrical shock could result in injury or death Disconnect all remote electrical facility power prior to working on the unit All wiring must conform to local an...

Страница 36: ...gh voltage wiring Upon arrival of the unit inspect all wiring and electrical components for damage either visible or concealed before installation Use correctly sized copper wire only and verify that...

Страница 37: ...uit breaker or fuse size required to protect the system Max Fuse or Max CKT BKR indicates the maximum breaker or fuse size and this information is used to size the appropriate fuses or a Heating Air C...

Страница 38: ...indoor evaporator to the electrical control box of the remote heat exchanger require heavier gauge wire and a special Parts order for a low holding current relay is required Consult Data Aire Parts de...

Страница 39: ...ve the jumper clip prior to installing the field wires Mini dap4 Controller The Data Aire Computer Room Air Conditioner CRAC or Computer Room Air Handler CRAH is furnished with a microprocessor based...

Страница 40: ...Condensate Pumps The optional condensate pumps which ships loose normally require a separate source of 110 volt power Always check the pump power requirements before connecting power Condensate pumps...

Страница 41: ...l Simply slide the manual switches to energize the fan compressor s humidification reheat and other functions as applicable Some DAP may have a special Electronically Commutated EC plug fan motor and...

Страница 42: ...ing diagram in the evaporator will indicate field interface terminals to the secondary heat exchanger The internal wiring of the secondary heat exchanger is found on a separate diagram which can be fo...

Страница 43: ...r R 410A pressure High pressure recovery machine suitable for R 410A pressure High pressure recovery tank suitable for R 410A pressure Ref DOT 4BA400 or ABW400 Triple Evacuation and Dehydration Proced...

Страница 44: ...l tool Two Stage Vacuum Pump s NOTICE Two pumps will speed up the procedure One 1 vacuum pump located normally outside at the condenser and one 1 vacuum pump is located indoors at the evaporator unit...

Страница 45: ...the nitrogen bottle regulator to the manifold gauges vacuum port and carefully break the vacuum with clean dry nitrogen Slowly raise the pressure to approximately 5 PSIG 35 kPa without contaminating t...

Страница 46: ...before the unit is put back on the pump for dehydration 8 After the system has been satisfactorily evacuated the evacuation equipment can be removed and the system can be charged with refrigerant 9 Ma...

Страница 47: ...offset the cooling load Suction pressure should be equal to 33 F 0 56 C saturated temperature or greater See further instructions for the following options Section 5 8 2 Air Cooled Split System Chargi...

Страница 48: ...s and Maintenance Manual for additional information regarding this type of heat exchanger DARC Heat Exchangers Phase Check See the DARC Air Cooled Condensers Installation Operations and Maintenance Ma...

Страница 49: ...0 407 20 33 40 65 60 98 81 31 Component Functional Test Critical components can be functionally verified by using the manual mode of the Mini dap4 See Mini dap4 User Manual for details regarding how...

Страница 50: ...sphere per the latest edition of ASHRAE Standard 15 and or any local building fire or mechanical codes This applies to all units with either shell and tube condensers or high pressure relief valve opt...

Страница 51: ...APA Starting Charge R 407C Weight of Refrigerant in Evaporator and Condenser Evaporator Model Condenser Model Starting Charge lbs DAPA 2 5XX GHRC 011XX or DARC 03XX GHRC 018XX or DARC 05XX Option GHRC...

Страница 52: ...al for details During manual control all automatic control is disabled but the system safety switches will remain functional Charging the Fixed Speed Compressor Charging requires the unit the unit ope...

Страница 53: ...he correct refrigerant charge Other parameters such as superheat suction pressure head pressure subcooling and ambient temperature are also important factors A system charged to a clear sight glass is...

Страница 54: ...r Package NOTICE Prior to refrigerant charging the proper tools and or equipment must be available and the system vacuum and moisture removal procedure must have been carried out Refer to Section 5 2...

Страница 55: ...warmer weather The receiver should be sized so it is at 80 to 82 of capacity while containing the entire system charge Another aspect of receivers is that they contain both liquid and gaseous refriger...

Страница 56: ...ition in the receiver See section 2 27 Refrigerant Piping Protection for additional information regarding piping and receiver over pressure protection Receiver Installation Be sure the receiver capaci...

Страница 57: ...e charging line to the refrigerant tank and set for liquid feed Open the refrigerant tank valve and purge the line Use a liquid charging adapter to break the vacuum with 90 PSIG 621 kPa of liquid refr...

Страница 58: ...e to increase Once you reach the pressure value shown below enable the condenser fans and continue to charge each circuit until it reaches the value shown Table 18 Discharge Head Pressure Refrigerant...

Страница 59: ...Receivers Acceptable parameters range for water glycol packaged units with receivers with return air temperature of 65 F 18 3 C to 85 F 29 4 C and entering water glycol temp of 65 F 18 3 C to 85 F 29...

Страница 60: ...adjusting stem clockwise to increase the superheat NOTICE Make no more than one turn of the stem at a time As long as thirty minutes 30 may be required for the system to re stabilize High Pressure Cu...

Страница 61: ...porator during the OFF cycle The Liquid Line Solenoid Valve LLVS is a direct acting NC normally closed i e closed when deenergized solenoid operated valve The advantage is the valve is closed when the...

Страница 62: ...ion Operation and Maintenance Manuals which should be referred to for more complete details regarding remote heat exchangers Brazed Plate Condensers Data Aire water cooled units use brazed plate conde...

Страница 63: ...d be kept smaller than 0 8 mm and is recommended to fit a 40 to 70 mesh strainer Regular maintenance of this unit is required to ensure continued performance 6 2 3 3 Dissolved products Under certain c...

Страница 64: ...to prevent corrosion of system components Consult glycol manufacturer for testing and maintenance of inhibitors Commercial ethylene glycol when pure is generally less corrosive to the common metals o...

Страница 65: ...is extremely undesirable in a closed loop system CAUTION Risk of using the wrong type of glycol can cause piping damage coolant fluid leaks and catastrophic and expensive building and equipment damage...

Страница 66: ...the Mini dap4 controller settings are established Optional Expanded dap4 Microprocessor Controller The Expanded dap4 microprocessor controller is available as an upgrade from the Mini dap4 and offers...

Страница 67: ...filter pressure differential pressure switch for proper adjustment temporarily cover approximately 75 of the return air opening using heavy cardboard or similar material The alarm should energize whe...

Страница 68: ...gized the burning debris can create smoke or an unpleasant odor To help avoid a problem periodic cleaning is recommended Humidifier If the unit is provided with an optional self contained microprocess...

Страница 69: ...input line power i e 208 230V 3PH 60HZ or 460V 3PH 60HZ Do not carry out any work on electrically live parts Even after disconnection the de link circuit is still live Always wait at least 3 minutes E...

Страница 70: ...dap4 has a time delay before the No Airflow alarm is energized It is adjustable from 5 to 180 seconds in 5 second increments On site where a voltage problem is known to exist the delay can be adjuste...

Страница 71: ...k operation sequence Check calibration of change over thermostat Energy Saver system only Controls Type Mini dap4 Expanded dap4 Thermostat Check unit control operation Check operation of the following...

Страница 72: ...secure Check capillary lines Condensate Pan and Pump if equipped Check for leaks Check for debris Inspect check float operation Check pump operation Condensers Water Cooled Check for water glycol lea...

Страница 73: ...nspect fan blade s Check wiring Inspect piping for leaks Glycol Pump Monthly if applicable Glycol leaks pump area Pump operation Auto air vent clean of mineral deposits Glycol Pump Quarterly if applic...

Страница 74: ...device This is to help determine the maximum protective device Question 4 What is the input voltage tolerance Answer In general it is 10 but refer to Electrical Section for more details Question 5 Wil...

Страница 75: ...ated on the unit serial name plate label Question 15 What is the SCCR rating for the unit Answer SCCR is short circuit current rating Unless specified the SCCR rating is 10 kA root mean square symmetr...

Страница 76: ...umidifiers can be adjusted within the range minimum to 100 Factory setting is 60 of capacity Question 5 Is an air vent valve required in the piping when an expansion tank is used Answer Yes air vents...

Страница 77: ...strainer 12 Low pressure drop across the valve a Same as 11 above b Undersized distributor nozzle or circuits c Low condensing temperature 1 Oversized TXV 2 TXV seat leak 3 Low superheat adjustment 4...

Страница 78: ...vice dataaire com Engineering dataaire com Sales dataaire com Fax 714 921 6010 Main 714 921 6011 Engineering 714 921 6022 Parts Sales Web Site www dataaire com Job Unit Information Data Aire Job Numbe...

Страница 79: ...ed system 55 57 Fluid cooler 62 Frequently Asked Questions FAQ 74 Full Load Amps FLA 74 Fuse 37 G Glycol system 37 Glycol Systems 62 Grounding 37 H Head pressure 53 Heat 13 33 38 39 47 48 66 Heat Exch...

Страница 80: ...75 Remote Sensor 40 Rigging 14 S Shutoff valve 31 Sight glass 53 Spare air filters 67 Special Service Equipment 43 Storage 9 Subcooling 53 59 Superheat 53 59 77 T Thermal Expansion Valve TXV 43 46 60...

Страница 81: ...DAP IOM_10 2022...

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