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Mydax, Inc. 

1M150W 

Water Cooled Chiller 

 

 

Designed for Lockheed Martin   

14 

 

 

SERVICE & WARRANTY

 

 
 
If a unit malfunctions, please contact the Mydax Service Department as soon as possible.  Many small problems can lead 
to large problems if not dealt with immediately.  Please have the serial number and model number on hand when calling. 
 
 

Mydax Service Department: (530) 888-6662    FAX:  (530) 888-0962 

 Email: 

service@mydax.com 

 

RETURN OF UNIT FOR SERVICE

 

 

Many problems may be repaired by field exchanges of a module, pump, controller, etc.  If return is required, 
please obtain a return authorization number from the Mydax Service Department or the unit may not be 
accepted at our receiving dock. 

 

Please refer to the shipping instructions which follow. 

 

SERVICE OF REFRIGERATION UNIT

 

 

Nearly all repairs to the refrigeration unit involve brazing or silver soldering.  This should only be done by a 
person trained in refrigeration service and familiar with the Mydax system. 

 

NOTE:  Before servicing any refrigeration unit involving brazing, remove all refrigerant from the system.  

Evacuate to a 400 micron vacuum to remove refrigerant residues, then open all service valves to dry 
air or dry nitrogen before use of a torch. 

 

In particular, service of Mydax refrigeration circuits requires attention to the following: 

 
     1) 

Use caution to protect components from heat damage. 

 
     2) 

Prevent any moisture from entering the circuit, as Mydax proportional valves do not function with moisture 
present.  Once moisture has entered the system it cannot be removed. 

 
     3) 

Remove insulation and instrumentation wiring or use heat shields to protect them from torch heat during work. 

 
     4) 

Before recharging the circuit, evacuate it to 200 microns at a minimum room temperature of 75

°

F for three 

hours, or longer for units with 4 horsepower or larger compressors. 

 
 

 

ONE YEAR WARRANTY

 

 
Mydax, Inc. warrants that its temperature control system, and the component parts thereof, will be free from defects in 
workmanship and materials for a period of one year from the date of delivery.  In the event that warranty service is 
required, the customer is requested to send the equipment freight prepaid to the factory for service.  Mydax will then 
perform the appropriate service and will return the equipment freight prepaid. 
 
If field service is required during the warranty period, the customer will be responsible for all travel expenses including 
airfare, car rental, lodging and meals.  The customer will not be invoiced for any warranty service performed, with regard 
to either labor or materials, during a field service visit. 
 
 
 
 

Summary of Contents for 1M150W

Page 1: ...vanced temperature control technology MYDAX INC INSTRUCTION OPERATION MANUAL 1M150W WATER COOLED CHILLER MYDAX INC 12260 Shale Ridge Road Auburn CA 95602 530 888 6662 FAX 530 888 0962 http www mydax c...

Page 2: ...YSTEM OVERVIEW 4 INSTALLATION 6 FRONT PANEL CONTROLS 8 ALARM ERROR MESSAGES 10 DIAGNOSTIC DISPLAYS 11 SERVICE WARRANTY 14 SHIPPING STORAGE PROCEDURE 15 DRAWINGS PARTS LIST FRAME DRAWING FLUID DIAGRAM...

Page 3: ...70 F 7 Gpm 40 F 20 PSI differential Electrical Service 460 480 VAC 60 Hz 3 phase 50 amp service Physical Parameters 65 H x 36 W x 58 D 1000 lbs dry weight STANDARD FEATURES This chiller is complete wi...

Page 4: ...reas where potentially harmful conditions exist and in this manual to bring attention to such conditions This chiller uses materials that are subject to environmental regulations be sure to familiariz...

Page 5: ...mpressor is hermetically sealed and no service should be required In the event that cleanup is necessary absorb oil with oil absorbent material and dispose of as a hazardous waste Follow approved clea...

Page 6: ...TD s resistance temperature devices located about the circuit The drawing shows RTD s at the discharge line leading from the recirculating pump at the return line leading to the reservoir between the...

Page 7: ...one power relay coil and a relay pole RL1 B The RESET switch serves to feed power to the relay which energizes the contactor When energized the contactor feeds power back to the relay so the RESET swi...

Page 8: ...e starting to allow the crankcase heater to separate the refrigerant from the oil CONDENSER FLOW The condenser inlet and outlet fittings are 1 stainless steel female pipe thread fittings FPT Plumb the...

Page 9: ...ow rate is visible on the front LCD display panel BYPASS VALVE To divert the recirculation flow from the output path back to the tank first open the Bypass valve then close the output flow adjustment...

Page 10: ...ition is eliminated or the MUTE ALARM switch is depressed again Pressing MUTE ALARM when no alarm is active causes the alarm to sound once and the TEST ALARM display to appear SET Enables SET TEMPERAT...

Page 11: ...decrements toggles tank temperature setpoint temperature and evaporator data view modes for multiple channel systems DECIMAL Display shows model number and software revision date and copyright RUN PU...

Page 12: ...s too close to freezing 4 C The microprocessor shuts down the system with a fatal alarm Push Reset Indicates that a fatal alarm in the interlock circuit has occurred and the operator must push the Res...

Page 13: ...a direct indicator of condenser temperature and pressure The microprocessor sends the CONDENSER HOT error message if the condenser temperature exceeds 54 C TEST PANEL 3 The first 3 sets of 4 digit nu...

Page 14: ...e the Flow OK relay below the selected GPM The output of the relay is wired to a BNC connector labeled Flow OK located on the rear panel of the unit The shield and center pin are the normally open con...

Page 15: ...setpoint temperatures of whichever recirculating channel was last selected at the Main Display and the system wide alarm history The second line indicates which recirculating channel was last selecte...

Page 16: ...use of a torch In particular service of Mydax refrigeration circuits requires attention to the following 1 Use caution to protect components from heat damage 2 Prevent any moisture from entering the...

Page 17: ...en run with water ethylene glycol should be added to the recirculating loop Verify that the concentration of ethylene glycol approaches 50 measure with a hydrometer in the recirculating loop before dr...

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