Engineered air EngA CU Series Скачать руководство пользователя страница 19

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CU MANUAL

IOM-14

19 of 46

Feb 06 R4

Refrigeration Table 2 (R407c) Piping Guidelines for Normal Air Conditioning Duty.

R-22 / 407C

Net

Evaporator

Capacity

Equivalent Length

(Actual length plus fittings and valves)

Maximum

Riser Size

Tons

Line

30 feet

50 feet

100 feet

150 feet

3 tons

Suction 3/4” (7/8”)

7/8"

1 1/8”

1 1/8"

Discharge

1/2"

5/8"

3/4"

7/8"

Liquid

3/8"

3/8”

1/2"

Condensate

5/8"

4 tons

Suction

7/8"

1 1/8”

1 3/8"

Discharge

5/8"

3/4” (7/8”)

7/8"

1 1/8"

Liquid

1/2”

1/2"

Condensate

5/8"

5 tons

Suction

7/8"

1 1/8"

1 3/8"

Discharge

5/8"

3/4” (7/8”)

7/8"

1 1/8"

Liquid

1/2"

5/8”

Condensate 3/4” (7/8”)

3/4” (7/8”)

7.5 tons

Suction

1 1/8"

1 3/8"

1 5/8"

Discharge 3/4” (7/8”)

7/8"

1 1/8"

1 3/8"

Liquid

1/2"

5/8"

Condensate

7/8”

10 tons

Suction

1 1/8"

1 3/8"

1 5/8"

Discharge

7/8"

1 1/8"

1 5/8"

Liquid

5/8"

3/4” (7/8”)

Condensate

1 1/8”

12.5 tons

Suction

1 3/8"

1 5/8"

2 1/8"

Discharge

7/8"

1 1/8"

1 5/8"

Liquid

5/8”

5/8"

3/4” (7/8”)

Condensate

1 1/8"

15 tons

Suction

1 3/8"

1 5/8"

2 1/8"

Discharge

7/8"

1 1/8"

1 3/8"

1 5/8"

Liquid 3/4” (7/8”)

3/4” (7/8”)

7/8"

Condensate

1 1/8"

20 tons

Suction

1 5/8"

2 1/8"

2 5/8"

Discharge

1 1/8"

1 3/8"

2 1/8"

Liquid

7/8"

Condensate

1 3/8"

Содержание EngA CU Series

Страница 1: ...OFFICE AND FACTORY CANADIAN EASTERN FACTORY 1401 HASTINGS CRES SE CALGARY ALBERTA T2G 4C8 Ph 403 287 4774 Fx 888 364 2727 32050 W 83 rd STREET DESOTO KANSAS 66018 Ph 913 583 3181 Fx 913 583 1406 1175...

Страница 2: ...CEDURE 17 PIPING MATERIALS AND PROCEDURES 23 CLEARANCE FOR CONDENSER AIR FLOW 25 LIFTING 26 MOUNTING 26 SHIPPING MATERIALS 27 ASSEMBLY 27 PIPING ELECTRICAL OR CONTROL SERVICE CONNECTIONS 27 ELECTRICAL...

Страница 3: ...record is considered to be part of the Installation Operation and Maintenance Manual Please report any omissions to the national service manager SAFETY PRECAUTIONS Read understand and follow the comp...

Страница 4: ...y of merchantability and or fitness for purpose Under no circumstances shall ENGINEERED AIR be liable to nor be required to indemnify Buyer or any third parties for any claims losses labour expenses o...

Страница 5: ...e instructions on the packing slip On receipt of the unit check electrical characteristics see rating plate to make sure the unit voltage is compatible with that available for the unit All parts for f...

Страница 6: ...l Code ANSI NFPA 70 State and Local Codes and in accordance with the local authorities having jurisdiction 2 This unit shall be electrically grounded in accordance with the latest edition of the Natio...

Страница 7: ...nded to be a complete manual for air conditioning design COMPONENT LOCATIONS Consider the issues related to your installation and the relative location of the components Locate the condensing unit as...

Страница 8: ...TX valve A low pressure control bypass timer may be required to allow time for liquid to reach the TX valve and prevent the system from short cycling during startup An EngA Intercooler optional may be...

Страница 9: ...A CU MANUAL IOM 14 9 of 46 Feb 06 R4 Suction line accumulators and crankcase heaters are required on all systems with underground piping Consult factory for guidance...

Страница 10: ...be rechecked at minimum load conditions to ensure oil return Tandem compressor systems and systems with unloaders must be re checked at the unloaded condition to ensure oil return Should a compromise...

Страница 11: ...talled to allow servicing of the equipment A suction and liquid line service valve at the condensing unit is considered a minimum requirement Sight Glass Moisture Indicator Required Sight glasses are...

Страница 12: ...valve should be balanced or dual ported and must be externally equalized One valve is required per distributor The equalization tube connects to the suction line at the outlet of the evaporator downst...

Страница 13: ...A CU MANUAL IOM 14 13 of 46 Feb 06 R4...

Страница 14: ...specifically authorized by Engineered Air Accumulators are STRONGLY RECOMMENDED on 1 100 Outside air systems 2 VAV systems 3 Process cooling systems that experience rapid load changes Condensing unit...

Страница 15: ...oling after the receiver Hot Gas Bypass Optional NOTE Hot gas valves and hot gas solenoid valves must be installed close to the discharge line at the condensing unit Valves installed in the wrong loca...

Страница 16: ...andem compressor set the unloaded capacity minus the hot gas is checked LOW AMBIENT OPERATION optional Several low ambient packages are available for cold weather operation Standard condensing units a...

Страница 17: ...feet of vertical rise 15 elbows and an angle service valve Select a suction line and a liquid line for each circuit Solution The capacity of each circuit is 10 5 tons Suction line selection 1 The syst...

Страница 18: ...d Tee Branch Flow Tee Straight Through Ball Valve Globe Valve Angle Valve 1 2 OD 1 4 0 9 2 3 0 7 2 3 2 7 0 9 0 9 17 6 5 8 OD 1 6 1 0 2 5 0 8 2 5 3 0 1 0 1 0 18 7 7 8 OD 2 0 1 4 3 2 0 9 3 2 4 0 1 4 1 4...

Страница 19: ...charge 5 8 3 4 7 8 7 8 7 8 1 1 8 Liquid 1 2 1 2 1 2 5 8 Condensate 3 4 7 8 3 4 7 8 7 5 tons Suction 1 1 8 1 1 8 1 3 8 1 3 8 1 5 8 Discharge 3 4 7 8 7 8 7 8 1 1 8 1 3 8 Liquid 1 2 5 8 5 8 5 8 Condensat...

Страница 20: ...Discharge 5 8 5 8 3 4 7 8 3 4 7 8 5 8 Liquid 1 2 1 2 1 2 1 2 Condensate 3 4 7 8 3 4 7 8 7 5 tons Suction 7 8 1 1 8 1 1 8 1 3 8 1 3 8 Discharge 5 8 3 4 7 8 7 8 7 8 3 4 7 8 Liquid 1 2 1 2 1 2 5 8 Conde...

Страница 21: ...8 Condensate 7 8 7 8 7 5 tons Suction 1 3 8 1 3 8 1 5 8 1 5 8 1 5 8 Discharge 7 8 7 8 1 1 8 1 1 8 1 1 8 Liquid 1 2 1 2 5 8 7 8 Condensate 7 8 7 8 10 tons Suction 1 3 8 1 5 8 2 1 8 2 5 8 2 1 8 Discharg...

Страница 22: ...F temperature penalty Discharge line PD less than 2 5 F temperature penalty Liquid line PD less than 2 F temperature penalty velocity less than 350fpm for liquid hammer Condensate line condenser to r...

Страница 23: ...property damage injury or death Refrigerant tubing must be cut with a tube cutter and the ends deburred before installation Never use a hacksaw or abrasive cutter to cut refrigeration tubing Long rad...

Страница 24: ...s of the system will be evacuated Add additional hoses or service fittings as required NOTE A high vacuum cannot be pulled through a solenoid valve whether or not is energized A high vacuum cannot be...

Страница 25: ...operation of this equipment Maintain at least 60 1500 mm clearance between the condenser coil and any obstruction Maintain at least 96 2400mm between adjacent condensing sections Do not place condense...

Страница 26: ...nit must be supported continuously by a mounting support system that is directly below the unit structural base frame and runs the entire length and width of the unit Refer to the Submittal Record for...

Страница 27: ...me must be bolted together first Access below the unit for bolting of the base frame must be provided Once the base frame has been tightly fastened loosely assemble all the bolts and nuts and then tig...

Страница 28: ...ake care to size the field wiring for a maximum 10 voltage drop The control circuit ampacity is noted on the field wiring diagram See the field wiring diagram for requirements for shielded or twisted...

Страница 29: ...ould occur if instructions are not followed This equipment contains moving parts that can start unexpectedly Injury or death could occur if instructions are not followed All work should be performed b...

Страница 30: ...ew and Scroll compressors MUST be checked for proper rotation at startup Permanent damage can occur if rotation is not correct Scroll compressors running backwards will typically have low head pressur...

Страница 31: ...of poor indoor air quality 18 Damper sections a Flat mixing dampers Both the fresh air and return air dampers are fully open when the dampers are at a 45 angle when fully stroked This provides optimum...

Страница 32: ...superheat setting is too low or filter drier is plugged etc The TX valve superheat was checked and adjusted at the factory to maintain a superheat of 18 F 10 C plus or minus 3 F 2 C measured on the s...

Страница 33: ...rature is less than design restrict the airflow across the condenser to increase head pressure to 130 F 55 C saturated discharge temperature for charging 1 Check that all manual shut off valves in the...

Страница 34: ...adjust as required OPERATION Warning This unit is connected to high voltages Electrical shock or death could occur if instructions are not followed This equipment contains moving parts that can start...

Страница 35: ...any interlock or safety switches under any circumstances 1 Temporary Shutdown To shut the unit down for a short time such as for inspection or service Shut of the service switch in the main control pa...

Страница 36: ...resent determine and fix the cause Properly remove and dispose of the contamination Properly clean and sanitize the affected area using only approved sanitizers suitable for HVAC equipment To provide...

Страница 37: ...s possible without slipping in the pulley grooves Belt deflection 3 4 19mm for each foot 300mm of span between the pulleys FOR FANS EQUIPPED WITH PILLOW BLOCK BEARINGS Belt Deflection Allow 1 64 0 4mm...

Страница 38: ...16 30mm 43 in lb 4 9 Nm 35 in lb 4 0 Nm 126 156 in lb 14 18 Nm 1 7 16 37mm 51 in lb 5 8 Nm 75 in lb 8 5 Nm 126 156 in lb 14 18 Nm 1 11 16 43mm 69 in lb 7 8 Nm 75 in lb 8 5 Nm 228 272 in lb 26 31 Nm 1...

Страница 39: ...l information refer to the fan and or bearing manufacturers literature LUBRICATION OF DODGE FAN BEARINGS Suggested Re lubrication Schedule Months for Dodge Ball Bearing Pillow Block Speed RPM 500 1000...

Страница 40: ...mium 2 Lubricate bearings prior to extended shutdown or storage and rotate shaft monthly to aid corrosion protection Suggested Re lubrication Schedule Months for Dodge Spherical Roller Bearing Split P...

Страница 41: ...ecommendations On motors having grease drain plugs remove the plugs and operate the motor for 15 minutes before replacing plugs DO NOT OVER GREASE RECOMMENDED MOTOR LUBRICATION INTERVALS Hours Service...

Страница 42: ...als can be based on calendar scheduling or visual inspection Scheduled intervals should be between one and six months depending on the pollutant loading in the enclosure area CONTROLS Annually clean a...

Страница 43: ...r Rotolock fittings be checked for tightness according to compressor manufacturers recommended torque at the start of every cooling season If the fittings are found to be loose they may need to be re...

Страница 44: ...A CU MANUAL IOM 14 44 of 46 Feb 06 R4...

Страница 45: ...less than 10 of rated voltage check wire size or determine cause and repair as required Primary voltage not within 10 of unit rating plate Have electrician check and repair as required High Head Pres...

Страница 46: ...rmine reason for high load and correct as necessary Too much air flow Check airflow balance system air Check blower speed Repair as required Inefficient compressor Check and replace as required Noisy...

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