Cornelius CH1500-CH7500 User's Manual
Contents
1. 7 STANDARD THERMOSTAT tle a 7 DUAL POINT ADJUSTMENT estais aes ye te 8 COOLING START P icicles 8 CONTROL PANEL 2 oce coo eL a ped ASI DE a 8 MAINTENANCE ad ai ee 10 FLUID RECOMMENDATIONS 11 TROUBLESHOOTING sl use a aa ia saaa 13 CHILLER DOES NOT OPERATE CONTROL POWER LIGHT OFF 12 PUMP DOES NOT OPERATE PUMP POWER LIGHT OFF 12 PUMP DOES NOT OPERATE PUMP POWER LIGHT ON 12 CHILLER DOES NOT COOL COOLING LIGHT OFF 12 CHILLER DOES NOT OPERATE COOLING LIGHT ON 12 A LOW PRESSURE ALARM LIGHT CYCLES ON OFF 13 HIGH PRESSURE ALARM LIGHT ON 13 LOW TEMPERATURE ALARM 13 SERVICE as ee o cM MSc aa E i AE 14 SAFETY CONTROLS 25 a ek 16 HIGH PRESSURE CONTROL HPC x Seen 16 LOW TEMPERATURE CONTROL LTC 16 LOW PRESSURE CONTROL PO nia nis wih Gs bon 16 PARTS IST ee a er See de oe aaa 18 WARRANTY ios nai Us pan i S EO 21 919610PR TABLE OF CONTENTS cont d LIST OF FIGURES FIGURE 1 INSTALLATION DETAILS 2 FIGURE 2 CHILLER PLUMBING SCHEMA2. CORNELIUS INC Telephone 800 551 4423 Fax 800 394 5140 CHILLER Models CH1500 CH7500 Operator s Manual with Installation Service and Parts 919610PR September 12 2006 Revised N A Revision A THIS DOCUMENT CONTAINS IMPORTANT INFORMATION This Manual must be read and understood before installing or operating this eguipment O IMI CORNELIUS INC 2006 PRINTED IN U S A CONTENTS GENERAL INFORMATION 1 INTRODUCTION cs asa sn ee 1 SPECIFICATION NOTES 1 ne ie an Libia 1 INSTALLATION ee He 2 LOCATION a is 2 ELECTRICAL doo U NA SE sa AAAS Da Sy 3 PHASE PROTECTION 3 PHASE OPTION 3 PHASE PROTECTION 3 PHASE OPTION ADJUSTMENT 3 PEUMBING 36 rat de dv mp Qala 3 WATER COOLED CONDENSERS 3 CHILLER WITH RESERVOIR ula dra oe aestas vance 4 AUTO REFILL OR TION ya Anal ei 4 CHILLER WITHOUT RESERVOIR 4 START P ud uM elos sau ayakuna taqaspa Wa yuka as 7 WATER FLOW START UP y ns es suo aa de ir 7 CHILLER WITH PUMP ei 252 6 ska ba no ae 7 CHILLER WITHOUT PUMP ie add 7 THERMOSTAT ADJUSTMENT
3. 1 AIR COOLED Chillers the condenser fins should be cleaned by blowing compressed air through the condenser from the fan side as required to eliminate any dirt or debris that may accumulate over time This can severely reduce the performance of the Chiller Cleanable air filters are available as an option Contact the factory for information AIR COOLED Chillers the condenser fan motor should be lubricated every 6 months with a few drop of 5 10 oil The pump motor should be lubricated with thirty drops of SAE20 oil once a year The circulation system should be drained and flushed periodically to avoid build up and possible restric tion of flow by contaminates The strainer at the Chiller inlet should be removed and cleaned monthly 919610PR 10 FLUID RECOMMENDATION Chillers are designed to operate with water to provide maximum performance for tempera tures of 40 F 100 F Distilled Water De lonized Water 1 5 5 De lonized Water 5 MEG OHMS Propylene Glycol Lab amp Industrial Grade Lab amp Industrial Grade Ethylene Glycol Mineral Hydraulic Oils Viscosity lt 50 Centistrokes Ethylene Glycol Commercial Automotive Antifreeze Acidic Basic Solutions Above 8 Below 6 PH Mineral Hydraulic Oils Viscosity gt 50 Centistrokes Acceptable Acceptable Acceptable with Stainless Steel amp PVC only No Copper or Brass Acceptable 30 1 70 Water For Applic
4. the cap should then be rein stalled before operation begins Auto Refill Option If the Chiller is provided with the Auto Refill Option install 1 4 inch or 1 2 inch tubing from the auto refill fitting located on the lower rear of the Chiller to a fresh water supply line The Chiller reservoir will fill with water auto matically and the proper reservoir level will always be maintained Chiller without Reservoir The Chiller and system piping should be filled with clean water ensuring that all air is purged from the system 919610PR 4 RESERVOIR LOW CONTROL FROM PROCESS EVAPORATOR CHILLER INLET OF 69 TO PROCESS BYPASS VALVE CHILLER OUTLET FIGURE 2 CHILLER PLUMBING SCHEMATIC WITH PUMP AND TANK STANDARD A FROM PROCESS x Ja CHILLER INLET amp TO PROCESS BYPASS VALVE EVAPORATOR LOW TEMP CONTROL CHILLER OUTLET FIGURE 3 CHILLER PLUMBING SCHEMATIC NO TANK OPTION FROM PROCESS CHILLER INLET L TO PROCESS LOW TEMP CONTROL CHILLER OUTLET EVAPORATOR FIGURE 4 CHILLER PLUMBING SCHEMATIC NO PUMP NO TANK OPTION 5 919610PR THIS LEFT INTENTIONALLY 919610PR 6 WATER FLOW START UP Chiller with Pump It is important to check the pump rotation on
5. Defective control transformer A water in reservoir B Restriction in the line to or from the Chiller C Open or defective pump overload relay Defective pump contactor E Defective pump motor or damaged impeller A Defective thermostat A Process water too cold Low process water flow C Defective expansion valve 12 Remedy Turn the control power switch to the on position Check the fuse and circuit breaker Check wiring and correct loose or poor connections Replace the switch Replace the transformer Check for correct voltage level on each phase of incoming 3 Phase power Check for correct phase rotation turn the pump power switch to the position Replace the switch Replace the transformer Fill reservoir Remove restriction Manually reset the relay or replace if necessary and check amp setting on overload Replace the pump contactor Replace the pump or impeller Replace thermostat Increase the thermostat setting Ensure that there is adequate flow through the process piping Replace the expansion valve Trouble HIGH PRESSURE ALARM LIGHT LOW TEMPERATURE ALARM Probable Cause Refrigerant loss Water bypass valve failed Defective pump Restricted condenser airflow Defective condenser fan and or motor Defective expansion valve Low or no condenser water flow Low or no process liquid flow
6. Defective thermostat Pro cess water too cold below 35 F Remedy Check the sight glass If bubbles are seen flowing through it the Chiller needs to be leak checked and recharged with refrigerant Consult technical service department Replace pump Clean the fins of the condenser and ensure that the air flow is not restricted Check to ensure that the fan blade is not blocked Replace the fan motor if necessary Check to ensure that the fan blade is not blocked Replace the fan motor if necessary Ensure that there is adequate flow throught piping to condenser Ensure that there is adequate flow through the process piping Replace the thermostat Increase the thermostat setting 919610PR When servicing a Chiller it is important to note the information contained on the data plate located the rear of the unit If technical assistance is needed the phone technician will need the Serial Number of your Chiller That informa tion is found on the Data Plate along with the model number voltage reguirements and refrigerant information The Serial Number is also needed when replacement parts are being ordered or for any warranty claims LA C GLENDALE HEIGHTS IL 60139 2268 PART NO MODEL NO SERIAL NO VOLTS HZ PH AMPS R134A MADEIN U S A BAR CODE FIGURE 5 SAMPLE DATA PLATE FOR CH5002 A Be
7. 4 Pump 2 Temperature Probe 5 Pump Relief Valve 3 Tank Assembly Call the Service Department for proper pump identification 19 919610PR FIGURE 10 ELECTRICAL BOX 5 Low Temperature Thermostat Control Transformer Contactor Compressor High pressure Control Low Pressure Control Q GQ Description Contactor Pump Overload Relay 1 0 to 1 6 Overload Relay 1 4 to 2 0 Overload Relay 2 0 to 3 0A Overload Relay 2 8 to 4 4 Overload Relay 4 0 to 6 WARRANTY IMI Cornelius Inc warrants that all eguipment and parts are free from defects in material and workmanship un der normal use and service For a copy of the warranty applicable to your Cornelius Remcor or Wilshire prod uct in your country please write fax or telephone the IMI Cornelius office nearest you Please provide the eguipment model number serial number and the date of purchase Locate the office in your area on the Cornelius web site www cornelius com under the contacts tab 24 919610PR CORNELIUS INC www cornelius com
8. EVAPORATOR TXV EQUALIZER BYPASS 2 VALVE CONDENSER TXV SENSING BULB COMPRESSOR LOW PRESSURE HIGH PRESSURE SWITCH SWITCH FIGURE 6 REFRIGERATION PIPING SCHEMATIC WITH HOT GAS BYPASS SIGHT GLASS FILTER DRIER TXV LIQUID RECEIVER TXV EQUALIZER LINE EVAPORATOR CONDENSER SENSING COMPRESSOR LOW PRESSURE HIGH PRESSURE SWITCH SWITCH FIGURE 7 REFRIGERATION PIPING SCHEMATIC WITHOUT HOT GAS BYPASS 17 919610PR Index No lt O Q N 15 PARTS LIST FIGURE 8 CHILLER PARTS BREAKDOWN Index No Description 1 2 FPT Coupling 16 Thermowell Low Temp Thermostat Not Shown 17 Corner Cover 18 Side Panel 19 Rear Panel 20 Upper Front Panel 21 Lower Front Panel 22 Lid 23 Control Panel 24 FPT Coupling 25 Temperature Control 26 Electric Box Assembly NS Fan Blade NS Fan Motor White Switch Indicator 91961OPR Description Red Indicator Green Indicator Compressor Accumulator Filter Drier TX Valve R 22 Evaporator Assembly Condenser Compressor Receiver Caster Condenser Water Cooled Regulating Valve Water Cooled Condenser Call the Techncial Service Department for Proper Panel 18 7 bo x o G FIGURE 9 AND COMPONENTS Index Index No Description No Description Thermowell Temperature Control
9. air inlets and outlets are free from obstruction 1 919610PR Install the Chiller indoors in a well ventilated area where ambient temperatures will never fall below 40 F or rise INSTALLATION above 110 F To obtain optimum cooling capacity the ambient temperature should be 80 F or below Standard CH Chiller have air cooled condensers air cooled units it is important that the air intake and dis charge not obstructed Avoid hot air discharge from other equipment enclosed areas where heat build up could cause a significant rise in ambient temperatures A minimum of two feet of space on all four sides of the Chiller will be sufficient to prevent obstruction Water cooled units should be located near a water source and drain CONTROL PANEL SEE DETAIL TANK LEVEL GAUGE CH 5000 AND 7500 ON REAR FOR CH1500 2000 AND 3000 919610PR ELECTRICAL JUNCTION BOX TANK FILL 1 INCH FPT CH1500 2000 3000 ES TANK FILL 1 INCH FPT S S CH5000 7500 0 0 O TANK DRAIN O AIR OUTLET AIR INLET ON OPPOSITE END WATER OUTLET 3 4 OR 1 WATER INLET FPT S S 3 4 INCH OR 1 FPT S S FIGURE 1 INSTALLATION DETAILS ELECTRICAL All wiring must conform to the National Electric Code and any applicable local codes The Chiller must be PERMANENTLY w
10. should be insulated to prevent condensation and or significant liquid heat loss Water Cooled Condensers Water cooled units must be connected to a source of tap water of chilled water and a drain The connections for the water supply 3 4 or 1 are located on the rear of the unit These units are supplied with a WATER REGULATING VALVE that allows only the required amount of water to pass through the condenser for a given heat load The water flow through the condenser can vary from 0 when the cooling system is in the OFF cycle to approximately 5 0 gpm at maximum rated loads for 1 1 2 ton units and approximately 20 gpm at maximum rated loads for 7 1 2 ton units This valve is factory set to operate where the water supply temper ature ranges from 50 F 10 C to 80 F 27 C with a supply pressure of 30 to 60 PSIG For temperatures pressure outside these ranges contact our Technical Service Department for assistance in field adjustment of the valve Once the system as been properly plumbed it is important that the circulation system be filled with water 3 919610PR with Reservoir The reservoir can be filled by removing the water fill cap located on the upper rear of the Chiller See Fluid Rec ommendations page After ensuring that the drain valve is closed fill the reservoir via the full port with clean water until the water level sight glass on the front of the unit indicates FULL
11. the three phase units Remove the lower side panel to expose the pump Turn the pump power switch to the position for a few seconds Observe the motor shaft to ensure that it is turning in the direction indicated by the arrow located on the pump housing If the rotation is incorrect reverse two of the three incoming power supply leads at the terminal strip After changing the leads check the pump rotation NOTE Running the pump in reverse for more than a few seconds will result in permanent pump damage After ensuring that the system piping is free from obstruction and that all valves are open turn the pump power switch to the position The pump power indicator should illuminate indicating that the pump is operating All Chillers with pumps are provided with a pressure regulating valve on the pump discharge This valve is pre set at the factory to ensure that system pressure does not exceed the capabilities of the pump motor and or pip ing If this valve reguires adjustment please contact the factory for proper setting procedure and pressures A flow meter and throttling valve can be added in the chiller inlet line in order to monitor and or adjust the flow rate through the Chiller Once the flow has been established the thermostat can be adjusted to the desired set point Chiller without Pump A flow meter and throttling valve can be added in the Chiller inlet line in order to monitor and or adjust the flow rate thr
12. will de energize the relay When the fault is corrected the monitor will auto matically reset Both Trip and Norm condition indicators are provided on the relay to aid in adjustment and sys tem trouble shooting This control is located in the enclosure labeled Monitor on top of the electrical box Phase Protection 3 Phase Option Adjustment The following procedure will allow the 3 Phase Monitor to achieve a trip point just below the nominal phase to phase voltage where the unit is applied Rotate the adjustment control fully clockwise or until the red Trip indicator illuminated Slowly rotate the ad justment control in a counter clockwise direction just until the green Norm indicator illuminates At this point the 3 Phase Monitor is the most sensitive to irregular power line conditions If nuisance tripping occurs turn the control slightly further counter clockwise PLUMBING Follow standard plumbing practices and local codes in making water connections The Chiller inlet and outlet connections are 3 4 or 1 Flexible hose and fittings are recommended for plumbing the system A No 20 mesh strainer should be installed on the Chiller inlet to prevent foreign particles from entering the sys tem and should be cleaned monthly Lines should be routed with as few bends as possible Prevent lines from running near radiators hot water pipes etc Any lengths of tubing that are exposed to high ambient tempera tures
13. TIC WITH PUMP AND TANK STANDARD ee a tom kei I e a 5 FIGURE 3 CHILLER PLUMBING SCHEMATIC NO TANK OPTION 5 FIGURE 4 CHILLER PLUMBING SCHEMATIC NO PUMP NO TANK OPTION 5 FIGURE 5 SAMPLE DATA PLATE FOR CH5002 A 14 FIGURE 6 REFRIGERATION PIPING SCHEMATIC WITH HOT GAS BYPASS 17 FIGURE 7 REFRIGERATION PIPING SCHEMATIC WITHOUT HOT GAS BYPASS u uu wan ais cate ia ee 17 FIGURE 8 CHILLER PARTS BREAKDOWN 18 FIGURE 9 PUMP AND TANK COMPONENTS 19 FIGURE 10 ELECTRICAL BOX COMPONENTS 20 919610PR GENERAL INFORMATION INTRODUCTION Remcor Series Refrigerated Recirculating Water Chillers are designed to provide a continuous flow of clean cooling water at a constant temperature and to handle a variety of closed loop and tank cooling applica tions The CH consists of a refrigeration system with associated operating controls housed in a sturdy sheet metal cabinet A standard pump and reservoir package provides a complete self contained water cooling and circulat ing system CH Chillers are designed to operate in a clean laboratory or industrial environment where ambient temperatures range from 40 F to 110 F Once properly installed the CH Chiller will run virtually maintenance free and provide a constant supply of cooling liguid to the application NOTE Please read through this manual before st
14. arting the chiller SPECIFICATIONS CH1500 CH2000 CH3000 CH5000 CH7500 Condenser Air Cooled Water Cooled Optional Temperature Controller Digital Display 30 100 0 39 C Pump Many Available Reservoir 10 Gallons 40 Gallons Voltage Full Load Amps 230 60 1 17 230 60 3 13 230 60 3 16 230 60 3 26 5 230 60 3 35 230 60 3 13 460 60 3 8 460 60 3 10 460 60 3 14 460 60 3 22 460 60 3 8 SPECIFICATION NOTES 1 The figures for power and cooling capacity are listed for air cooled units with a circulation temperature of 68 and ambient temperature of 80 F and standard pump 2 Cooling capacity will be affected as follows Derate 17 for 50 Hz operation Derate 1 for each F drop in recirculating temperature Derate 5 for each increase in ambient temperature Optional pumps will decrease net cooling capacity 3 The operating water temperature range for water is 40 F 5 C to 100 F 38 C If use of other fluids or temperatures are required the Technical Service Department must be contacted so the appropriate ranges can be set 4 Water cooled units require about 20 less input power 5 All CH Chillers are thoroughly tested before leaving the factory to ensure that each unit meets these speci fications prior to shipment WARNING Never operate the Chiller with the panels removed Always use the power switch to turn off the Chiller when it is not being used Always ensure that all
15. at the flow through the system is greater than 2 gallons per minute This control is mounted in the lower left hand corner of the electric box It automatically resets itself once the water temperature is restored to 38 F The low temperature control may be adjusted for lower temperatures if a glycol solution is used Contact Technical Service Department for temperatures below those stated here See Fluid Recommendations page LOW PRESSURE CONTROL LPC This control prevents system operation in the event that the low side pressure falls below 44 psi If this occurs check the following 1 That the thermostat set point is set at 40 F or greater 2 That the flow through the system is greater than 2 gallons per minute 3 That bubbles are present in the sight glass 4 That water bypass valve allows flow through the Chiller in a dead head situation This control is located to the right of the high pressure control in the electric box It automatically resets itself once the low side pressure rises to approximately 64 psi If the control opens again check the control setting with refrigeration gauges If setting is correct contact Technical Service Department 919610PR 16 E 09 Kn LIQUID LINE SIGHT GLASS SOL VALVE FILTER DRIER amp LIGUID RECEIVER
16. ations with Temperatures below 40 F Acceptable 30 1 70 Water For Applications with Temperatures below 40 F Acceptable NOT Acceptable Silicate Rust Inhibitors in Automotive Commer cial Antifreeze will damage pump seals and housing which lead to failure Not Acceptable Not Acceptable For questions regarding special or other fluids contact IMI Cornelius at 800 238 3600 To Purchase Lab or Industrial Glycol contact IMI Cornelius Bevcore 800 551 4423 Part 111521000 5 gallons 866 275 6392 Part 1008534 Chem Glycol Food Grade 5 gallon 11 919610PR TROUBLESHOOTING IMPORTANT Only qualified personnel should service internal components or electrical wiring is disconnected from the unit WARNING If repairs are to be made to the refrigeration system make sure electrical power Trouble CHILLER DOES NOT OPERATE CONTROL POWER LIGHT OFF PUMP DOES NOT OPERATE PUMP POWER LIGHT OFF PUMP DOES NOT OPERATE PUMP POWER LIGHT ON CHILLER DOES NOT COOL COOLING LIGHT OFF CHILLER DOES NOT OPERATE COOLING LIGHT LOW PRESSURE ALARM LIGHT CYCLES ON OFF 919610PR Probable Cause Control power switch off B No power C Defective power supply connection D Defective control power switch E Defective control transfromer 3 Phase Monitor tripped A Pump power switch off B Defective pump power switch
17. ired by means of electrical conduit to a properly fused disconnect of proper amperage or wired to a properly rated power cord and plugged into an outlet with the appropriate disconnect and amperage rating The electrical junction box located on the upper rear of the Chiller includes a four terminal strip for power supply connections DATA PLATE located beside the junction box indicates the actual phase and amperage for each Chiller After the electrical connections are made power must be supplied to the Chiller for a period of 12 hours with control switched off to allow the compressor crankcase heater to warm the compressor lubricant supplied is correct Running the pump in reverse for more than a few seconds will result in CAUTION On three phase applications it is important that the rotation of the pump when permanent pump damage When the pump is running shaft rotation must match the direction indicated on the pump housing If the rotation is incorrect reverse two of the three incoming power supply leads The Phase Protection 3 Phase Monitor Option will prevent the pump from operating backwards See the option description Phase Protection 3 Phase Option The 3 Monitor detects phase loss low voltage and phase reversal by continuously monitoring the 3 Phase power lines for abnormal conditions When correct voltage and phase rotation are applied the internal relay will energize A fault condition
18. nient LED temperature readout that indicates system liquid temperature 2 CONTROL POWER SWITCH A simple ON OFF switch that switches power to the control circuit This switch must be ON for the Chiller to operate 919610PR 8 CONTROL POWER LIGHT A white light that indicates Chiller control power is present COOLING LIGHT A green light that indicates refrigeration system operation This light cycles on and off in response to the thermostat HIGH PRESSURE ALARM LIGHT A red light that indicates high refrigeration pressure LOW PRESSURE ALARM LIGHT A red light that indicates low refrigeration pressure LOW TEMPERATURE ALARM LIGHT A red light that indicates and abnormally low system fluid temper ature PUMP POWER SWITCH OPTIONAL A simple ON OFF switch that switches power to the Chiller pump This switch must be for the Chiller to operate PUMP POWER LIGHT OPTIONAL A white light that indicates that the Chiller pump power is present LOW FLOW HIGH TEMPERATURE INTERLOCK OPTIONAL Contacts energized when abnormally low fluid flow or an abnormally high fluid water temperature is sensed by Chiller controls LOW LEVEL AUDIBLE ALARM OPTIONAL An audible alarm that indicates unsafe reservoir level 9 919610PR CAUTION Disconnect electrical power before performing any of the following maintenance procedures The Chiller will reguire very little normal maintenance
19. ough the Chiller Once the flow has been established the thermostat can be adjusted to the desired set point See thermostat adjustment THERMOSTAT ADJUSTMENT Standard Thermostat The following procedure should be followed to adjust the standard thermostat 1 set the SET POINT press and release the SET button the current SET POINT will be displayed 2 While the current SET POINT is displayed press the UP or DOWN button to change the SET POINT to desired temperature 3 Release all buttons The display will show the system water temperature after a few seconds The SET POINT can be viewed at any time by pushing the SET button The thermostat has a range that has been preset at the factory The range is 40 F 5 C to 100 F 38 C If operation outside of this range is required please contact the Technical Service Department UP DOWN SET 7 919610PR Dual Point Adjustment 1 To set the SET POINT for Level 1 Press and release the SET button Re1 should be displayed 2 Press the SET button the current SET POINT TEMPERATURE should be displayed Press the UP or DOWN button to change the SET POINT 3 set the SET POINT for Level 2 Press and release the SET button Re2 should be displayed 4 Press the SET button the current SET POINT TEMPERATURE should be displayed Pres
20. s the UP or DOWN button to change the SET POINT 5 Press the fnc button to exit the program The thermostat has a range that has been preset at the factory The range is 40 F 5 C to 100 F 38 C If operation outside of this range is required please contact the Technical Service Department out2 outi C re a lO O VD Ulm eliwell 1 915 Cooling Start Up Once flow is established and the thermostat is set to the desired set point turn the control power switch to ON Ensure that the air is flowing in the left side facing the control panel and out the right side If not reverse two of the three incoming power supply leads at the terminal strip Once again check for correct air flow All alarm indicators should be extinguished and the Chiller refrigeration system will cycle in order to maintain the established set point Re check the reservoir level to ensure that it is FULL if so equipped and add water if necessary The Chiller is now ready for normal operation CO O Jo e CONTROL COOLING HIGH LOW LOW PUMP POWER PRESSURE PRESSURE TEMP POWER Control Panel 1 TEMPERATURE INDICATOR CONTROLLER Thermostat Combines a precise temperature control and accurate set ability with a conve
21. sure to include the serial number on any documentation or billing information 919610PR 14 THIS LEFT INTENTIONALLY 15 919610PR SAFETY CONTROLS Each Chiller is provided with three standard safety controls These controls are arranged in series in the control circuit to automatically shut down the unit in the event that a condition exists which could be harmful to the re frigeration system components This section includes a brief description of each control its location and some troubleshooting hints that may be helpful HIGH PRESSURE CONTROL HPC This control prevents system operation in the event that the high side pressure exceeds 350 PSIG If this oc curs check the following 1 That the condenser is clean and that the air inlets and outlets are unobstructed 2 That the ambient temperature at the chiller location is below 110 3 That the fan blade is rotating Press the reset button located on the front of the control to restart the chiller This control is located in the upper left hand corner of the electric box If the control opens again check the control setting with refrigeration gauges If the setting is correct contact technical service department LOW TEMPERATURE CONTROL LTC This control prevents system operation in the event that the fluid inside the evaporator falls below 35 F If this occurs check the following 1 That the thermostat set point is set at 40 F greater 2 Th
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