Related Manuals for Trane CGA Series
Summary of Contents for Trane CGA Series
- Page 1 Installation Operation Maintenance Scroll chillers and heat pumps Models CGA/CXA May 2015 CG-SVX031A-GB Original instructions...
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Page 2: Table Of Contents
Contents Overview Reference and certifications Installation Electrical connections Hydraulic diagrams Tank mounting instructions Start-up procedures Start-up Maintenance Recommended spare parts... -
Page 3: Overview
Photographic evidence must be provided for macroscopic damage. The card must be sent to Trane within 8 days of receiving the goods: if it is not sent back or delayed, the complaint will not be accepted. -
Page 4: Reference And Certifications
The legal representative of the company appointed by the owner to position and hydraulically, electrically etc. connect the Trane unit to the plant: he or she is responsible for moving and the correct installation of the unit in accordance with the indications in this manual and with the national regulations in force. - Page 5 The operator must only intervene on the unit controls. He or she must not open any panels except for the one which gives access to the control module. The installer must only intervene on the connections between the plant and the machine. He or she must not open any machine panels nor carry out any commands.
- Page 6 • if modifications must be carried out to the cooling, hydraulic or electrical circuit of the unit, as well as to its command logic, contact Trane • if particularly complicated assembly or disassembly operations are to be carried out contact Trane...
- Page 7 • always use original spare parts bought directly from Trane or from official dealers of the companies reported in the list of recommended spare parts • if the unit is to be moved after a year of being in the site or if it has to be dismantled contact Trane Manual alarm reset If there is an alarm the unit must not be manually reset before having located and eliminated the cause of the fault.
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Page 8: Installation
Installation Moving and positioning the unit The units have been designed to be lifted from above by means of eyebolts and holes in the base members. Use retractor bars to keep the lifting wires or chains away from the unit. Lifting procedures provided with the unit have to be respected. -
Page 9: Electrical Connections
Electrical connections Electrical power supply The mains power supply characteristics have to match the unit’s absorption. The mains power supply tension must correspond to the nominal value ± 10%, with a maximum difference between the phases of 3%. Power connections Protect the unit electric box power supply circuit with protection devices (not included in the supplied equipment) Connect the line terminals with a three-core cable of a section, which is appropriate to the machine absorption. - Page 10 One flow switch The above-mentioned installation indications represent necessary conditions for the guarantee to be valid. Trane is at your disposal to examine any different requirements, which have to be approved before starting up the chiller. It is necessary that the water flow rate to the unit is compatible with the evaporator one. It is also necessary that the water flow rate is kept uniform while the unit is running: it is suggested to use always a pump system dedicated to the unit and independent from the remaining part of the plant.
- Page 11 = EVAPORATOR FLOW RATE = CONDENSER FLOW RATE cond = WATER VOLUME in cubic meters The permitted tolerance for flow rates is equal to 10% of the nominal provided in product catalog. Water circuit regulation equipment Centrifugal motor water pump: Assures the discharge and the prevalence necessary to supply tube nest evaporator, the tank and the utility.
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Page 12: Hydraulic Diagrams
Hydraulic diagrams... -
Page 15: Tank Mounting Instructions
Tank mounting instructions Remove the two inspection panels of the water group with tank. With the unit in lifting phase positioning the drain path pipes as shown in figure below. C Position the unit in the group with water tank, lining up the holes of the upper bracket of the tank with the drilling of the underside of the foot, making sure to route the drain path pipes inside the holes on the base of the hydronic kit. - Page 16 D. Carry out by coupling bolts E. Connect the inlet of the water tank with the outlet of the unit.
- Page 17 Valid only for size CGA/CXA 040 D. Mounting the two inspection panels of the water tank Valid only for size CGA/CXA 040 Valid for sizes from CGA/CXA 060 - 115...
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Page 18: Start-Up Procedures
Refrigerant seals control Trane units shipped with the complete charge of refrigerant and are at a sufficient pressure to check the seal after installing. If the system were not under pressure, blow refrigerants (vapour) into it until pressure is reached and look for leakage. - Page 19 Refrigerant charge Charge with unit stopped and in vacuum (refrigerant charge in the liquid phase) Open the shut off valve as far as possible so that it closes the service coupling. Connect the refrigerant cylinder to the service coupling without tightening the coupling. Half close the liquid shut off valve. If the circuit has been dehydrated and is in vacuum, charge the liquid by turning the cylinder upside down.
- Page 20 Charge in vapour phase...
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Page 21: Start-Up
Follow the above mentioned procedure every time the plant is stopped long enough for the water temperature contained in it to rise. Control of the oil charge All units Trane have compressors loaded with oil at the factory. The scroll compressors are equipped with an oil sight glass and from which can check the level. - Page 22 Description of the operation Recommended frequency Control of compressor oil level monthly Control of the suction temperature (superheating) monthly Control of the hydraulic circuit water filling monthly Control of electric absorption fan motors and compressor monthly Control of power supply and auxiliary power monthly Control of refrigerant charge through liquid sight glass (if available) monthly...
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Page 23: Maintenance
Every Trane unit comes with a logbook, in which the user or the person delegated to machine maintenance can keep all the required notes, in order to keep a historical log of the Trane unit. A lack of notes in the logbook could be considered proof of careless maintenance. - Page 24 HVAC systems, comprehensive building services, and parts. For more information, visit www.Trane.com. Trane has a policy of continuous product and product data improvement and reserves the right to change design and specifications without notice. © 2015 Trane All rights reserved...