Model Number Reference Guide. Deluxe System 3 Installation Manual. Marley — SPX Website. Aquatower Steel Coolling Tower — Brochure. Aquatower Cooling Tower — Series — Brochure — Aquatower Cooling Tower — User Manual. Series 15 Cooling Tower — Brochure — S Cooling Tower — Brochure. McQuay Website. Mueller Website. Multistack Website.
Raypak MVB- Brochure. Scot Pumps Website. Scot Centrifugal Transfer Pump e Boiler Product Data. Thermal Care Website. Trane Website. Trane Product Literature Search. Thermachill Absorption Chillers — Product Brochure — Helical Rotary Screw Compressors — Brochure. Timed closure of suitable contacts connected to terminals 13 and 17 PWM contacts will provide remote offset function of the chilled liquid set point if required. See Figs. Inspect unit for installation damage.
Units are normally shipped as standard with a full refrigerant operating charge. Check that refrigerant pressure is present in both systems and that no leaks are apparent. If no pressure is present a leak test must be undertaken. The leak s should be located and repaired.
Do not liquid charge with static water in the evaporator. Care must also be taken to liquid charge slowly to avoid excessive thermal stress at the charging point. Once the vacuum is broken, charge into the condenser coils with the full operating charge as given in the Technical Data Section.
Open each compressor suction, economizer, and discharge valve fully counter-clockwise then close one turn of the stem to ensure operating pressure is fed to the pressure transducers. Open the liquid line service valve fully and ensure the oil return line ball valve is open in each system.
Stroke the oil pump to add oil to the oil system. The oil level should be between the middle of the lower and middle of the upper sight glasses of the oil separator. Approximately 5 gallons is present in the entire chiller system, with gallons in the oil separator. Check that all fans are free to rotate and are not damaged. Ensure blades are at the same height when rotated. Verify that all sources of electrical supply to the unit are taken from a single point of isolation.
Check that the maximum recommended fuse sizes given in the Technical Data Section have not been exceeded. Check the panel to see that it is free of foreign materials wire, metal chips, etc. Check to assure the customer power cables are connected correctly.
Ensure that connections of power cables within the panels to the circuit breakers, terminal blocks or switch disconnectors are tight. Ensure that all unit internal ground connections are tight. Verify that the site voltage supply corresponds to the unit requirement and is within the limits given in the Technical Data Section. The 3-wire control transformer is mounted external to the panel. It is important to check that the correct primary tapping has been used:. With the supply voltage to the unit turned off, remove the lid to the transformer box.
Check that the tapping used conforms to the site supply voltage. Verify the compressor heaters are energized. The inlet should be at the refrigerant pipework connection end of the evaporator. Purge air from the top of the evaporator using the plugged air vent mounted on the top of the evaporator body.
Flow rates and pressure drops must be within the limits given in the Technical Data Section. Operation outside of these limits is undesirable and could cause damage. Ensure the leaving liquid temperature sensor is coated with heat conductive compound part no. This sensor also acts as the freeze protection thermostat sensor and must always be in the water OUTLET sensor pocket. The chilled liquid temperature control settings need to 5 be set according to the unit model and required oper-.
See Section 7. Set the required leaving chilled liquid temperature setpoint and control range. See Section 6. Be sure that the Micro Panel is properly programmed page and the System Start-up Checklist page is completed. Ensure that any remote run interlocks are in the run position and that the run schedule requires the unit to run or is overridden.
Be ready when each compressor starts, to switch the unit OFF immediately if any unusual noises or other adverse conditions develop. Use the appropriate emergency stop device if necessary. If oil pressure does not develop, the automatic controls will shut down the compressor. Under no circumstances should a restart attempt be made on a compressor which does not develop oil pressure immediately. After several minutes operation and providing a full charge of refrigerant is in the system, the bubbles will disappear and be replaced by a solid column of liquid.
As discharge pressure rises, the condenser fans operate in stages to control the pressure. Verify that the fan operation is correct for the type of unit. Check suction superheat at steady full compressor load only. Measure suction temperature on the copper line about 6" mm before the compressor suction service valve. Measure suction pressure at the compressor service valve.
The electronic expansion valves are factory set and should not need adjustment. Check economizer superheat at steady full compressor load only, under conditions when the economizer solenoid is energized. See Section 1. Measure gas pressure at the back seat port of the economizer service valve. Check liquid subcooling at steady full compressor load only.
It is important that all fans are running for the system. Measure liquid line temperature on the copper line beside the main liquid line service valve. Measure liquid pressure at the liquid line service valve. No bubbles should show in the sight glass. If subcooling is out of range add or remove refrigerant as required.
Do not overcharge the unit. The units are designed to work independently, or in conjunction with other equipment via a YORK ISN building management system or other automated control system. When operating, the unit controls monitor the chilled liquid system temperature at the unit and take the appropriate action to maintain this temperature within desired limits.
This action will involve running one or more compressors at a suitable load step to match the cooling effect of the refrigerating systems to the heat load on the liquid system. The heat removed from the chilled liquid is then rejected from the air cooled condenser coils.
The following sections give an overview of the operation of the unit. For detailed information, reference should be made to the Chiller Control Panel Programming and Data Access Operating Instructions for the unit pages - Any problems found by the pre-check will be displayed if present. If no problems are present and cooling duty is required the lead compressor will start. Once the unit has been started, all operations are fully automatic. After an initial period at minimum capacity on the lead compressor, the control system will adjust the unit load depending on the chilled liquid temperature and rate of temperature change.
If very little heat load is present, the lead compressor will continue at minimum capacity or may simply stop again to avoid overcooling the liquid. If the latter is the case, one compressor will restart automatically should the liquid temperature rise again.
Once a compressor is running, discharge pressure rises as refrigerant is pumped into the air cooled condenser coils. When a compressor is running, the controller monitors oil pressure, motor current, and various other system parameters such as discharge pressure, chilled liquid temperature, etc. Should any problems occur, the control system will immediately take appropriate action and display the nature of the fault Section 8.
The compressor heater will energize to prevent refrigerant condensing in the compressor rotors. If ambient temperatures are low, the evaporator heater mats will also energize to prevent the possibility of liquid freezing in the vessels. The mains power to the unit should not normally be switched OFF, even when the unit is not required to run. An automatic pumpdown will occur using the system switches.
If mains power must be switched OFF, for extended maintenance or a shutdown period , the compressor suction, discharge and motor cooling service stop valves should be closed clockwise and if there is a possibility of liquid freezing due to low ambient temperatures, the evaporators should be drained.
Ft H2O. Drop, kPA. Debris in the water may also cause additional pressure drop. When using glycol solutions, pressure drops are higher than with water see correction factors to be applied when using glycol solutions. Welcome to ManualMachine. We have sent a verification link to to complete your registration. Log In Sign Up. Forgot password? Enter your email address and check your inbox. Please check your email for further instructions.
Enter a new password. FORM NOTE is used to highlight additional information which may be helpful to you. Suction Superheat WARRANTY York International warrants all equipment and materials against defects in workmanship and materials for a period of eighteen months from deliveryunless extended warranty has been agreed upon as part of the contract.
Structural Support Structural support of the unit must be provided as indicated in these instructions. Mechanical Strength The unit is not designed to withstand loads or stresses from adjacent equipment, pipework or structures. General Access There are a number of areas and features which may be a hazard and potentially cause injury when working on the unit unless suitable safety precautions are taken.
Pressure Systems The unit contains refrigerant vapor and liquid under pressure, release of which can be a danger and cause injury. Electrical The unit must be grounded. High Temperature and Pressure Cleaning High temperature and pressure cleaning methods e. General Description The Air Cooled Screw Chiller utilizes many components which are the same or nearly the same as a standard reciprocating chiller of a similar size.
Each of the 2 refrigerant circuits consists of 4 passes with the chilled liquid circulating back and forth across the tubes from one end to the other. Removable heads are provided for access to internally enhanced, seamless, copper tubes. Water vent and drain connections are included.
The water nozzles are provided with grooves for mechanical couplings and should be insulated by the contractor after pipe installation. Oil Cooling Oil cooling is provided by routing oil from the oil separator through several of the top rows of the condenser coils and back to the compressor.
Power and Control Panel All controls and motor starting equipment are factory wired and function tested. Each power compartment contains: Compressor and fan starting contactors, fan motor external overloads, control circuit serving compressor capacity control, compressor and fan contactor coils and compressor motor overloads.
Fig 1, page 12 Current transformers in the 2ACE module provide compressor motor overload protection and sense each phase. Sequentially sweeps through the motor protection dip switch setting. Other symbols Defective module or supply voltage. Current Overload The 2ACE module design uses one integral current transformer per phase to provide protection against rapid current overload conditions. Upon detection of a miswired motor load, the module will de-energize the main contactor pilot circuit within 50 millisecond response time.
The standard display language is English, with 4 other languages available. Program For setting low leaving liquid temperature cutout, to second anti-recycle timer, average motor current unload point, liquid temperature setpoint reset signal from YORK ISN or building automation system.
The supply with appropriate branch circuit protection in accordance with applicable 2 Local codes, provides the unit control circuit power sup- ply via the panel mounted Emergency Stop Switch. Field-mounted 1" 25 mm spring isolators — Level adjustable, spring and cage type isolators for mounting under the unit base rails Field-mounted. Only Panels Factory : Louvered Cond.
E : 5 Year Compressor Parts Only 2. Major damage must be reported immediately to your local YORK representative. Units are provided with lifting eyes extending from the sides of the base frame which can be attached to directly 3 using shackles or safety hooks See Figure 4. LD FIG. Installation Place each mount in its correct position and lower the unit carefully onto the mounts ensuring the mount engages in the mounting holes in the unit base frame.
Refer to the Technical Data Section for details. The liquid must enter the evaporator at the inlet connection. The inlet con- nection for the evaporator is at the far end of the unit when viewed from the power and control panels. Water inlet is always nearest the suc- tion gas outlet on the DX evaporators. There should be a straight run of piping of at least 5 pipe di- ameters on either side. Connect a ground wire to the main protective ground terminal.
Remote Emergency Stop Device If required, a remote emergency stop device can be wired into the unit. Alarm Contacts Each system has a voltage-free change over contact which will operate to signal an alarm condition whenever a system locks out, or there is a power failure.
Remote Print Closure of suitable contacts connected to terminals 13 and 18 Figs. Remote Setpoint Offset — Temperature Timed closure of suitable contacts connected to terminals 13 and 17 PWM contacts will provide remote offset function of the chilled liquid set point if required. Commissioning FORM Inspection Inspect unit for installation damage.
Refrigerant Charge Units are normally shipped as standard with a full refrigerant operating charge. Valves Open each compressor suction, economizer, and discharge valve fully counter-clockwise then close one turn of the stem to ensure operating pressure is fed to the pressure transducers. Fans Check that all fans are free to rotate and are not damaged.
Control Panel Check the panel to see that it is free of foreign materials wire, metal chips, etc. Power Connections Check to assure the customer power cables are connected correctly. Supply Voltage Verify that the site voltage supply corresponds to the unit requirement and is within the limits given in the Technical Data Section. Control Transformer The 3-wire control transformer is mounted external to the panel. It is important to check that the correct primary tapping has been used: With the supply voltage to the unit turned off, remove the lid to the transformer box.
The machine is now live! Compressor Heaters Verify the compressor heaters are energized. Temperature Sensor s Ensure the leaving liquid temperature sensor is coated with heat conductive compound part no. Control Supply Verify the control panel display is illuminated. The chilled liquid temperature control settings need to 5 be set according to the unit model and required oper- ating conditions. Setpoint and Remote Offset Set the required leaving chilled liquid temperature setpoint and control range.
Suction Superheat Check suction superheat at steady full compressor load only. Expansion Valve The electronic expansion valves are factory set and should not need adjustment.
Economizer Superheat Not all models are equipped with economizers Check economizer superheat at steady full compressor load only, under conditions when the economizer solenoid is energized.
Subcooling Check liquid subcooling at steady full compressor load only. Operation FORM MAX EC 4. You can only view or download manuals with.
Sign Up and get 5 for free. Upload your files to the site. You get 1 for each file you add. Get 1 for every time someone downloads your manual. Buy as many as you need.
View and download manuals available only for. Register and get 5 for free. Upload manuals that we do not have and get 1 for each file. Get 1 for every download of your manual. Buy as much as you need. Standards for Safety Suitability for Application Structural Support Mechanical Strength General Access Pressure Systems Rotating Parts Sharp Edges Refrigerants and Oils Emergency Shutdown Significant sound reduction at off—design conditions makes YCIV chillers quieter than competitive chillers.
Low mechanical-installation, electrical-installation and equipment costs save money. Technical Support.
0コメント