Small Chiller Supply

Providing independence from OEM pricing since 2003!

~ Controlling cost with better quality after-market products & retailing OEM parts ~

7413 E. County Rd 6900,   Lubbock, Texas  79403-7639     (806)  782-4570

email: myles.opheim@smallchiller.com

 

Main Start

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Contact Us

 

  ~ SERVICE ~  
   

    Service Warning Tips!

  1. Remove cap tube & consider replacement - (Flush condenser / evaporator separately)
  2. Evacuate & dry nitrogen pressure test before compressor installation with 2 fittings required - (Brazed plate evaporator sections and aluminum micro-channel condenser coils are the worst!)
  3.Check or replace starter contactor block
  4.Inspect circulating pump intake screen (possible blockage)
  5.Test circulating pump volume (use flow meter)

   

  Compressor Change Out Quick Tips additional information! (pdf) Click here

   

    SERVICE WARNING PHOTOGRAPHS

  Compressor Failure-Scoring Compressor Failure-Scoring  
   
       
 

A flushing agent (solvent) diluted the refrigerant oil. A loss of lubricity resulted in metal to metal scoring. Notice the carbon buildup from previous operation. The factory supplied PVE oil tends to be opaque in color. Only 30 minutes of run time.

Comparasion: (Left ) Damage to factory finish. On the right: factory finish ground and tapped surface. Estimated: 250-500 RPMS surfce finish (L) and likely 8-16 RPMS (R)

 
   
       
  Brazed plate evaporator Brazed plate evaporator  
   
       
  micro-channel condenser micro-channel condenser  
   
       
  Copper spun screen liquid line filter drier  
   
       
  Horizontal Slab shown Vertical Slab shown  
   
 

The process tube shown is what the factory utilized as the second access fitting. If only one evaporator access is visible, be certain to sweat-in a high side flare fitting for proper evacuation. Pull from both sides of the capillary restriction!

 
       
  Water-glycol sediments Water-glycol sediments  
   
       
  Water-glycol sediments Water-glycol sediments  
   
       
  ****   Water-Glycol Cheat Sheet:  A Summary (pdf) Click here   ***  
       
  Mineral Oil sediments Mineral Oil sediments  
   
       
  Mineral Oil sediments Mineral Oil sediments  
   
       
  Drop in Evaporator Coil - Stir Motor Bearing Change Resin Pack Motor - Disassembly  
   
       
  Resin Pack Motor - 12 Watt Resin Pack Motor - 12 Watt  
   
       
       

Examples of the Nichiden Kogyo service valve

part# ZVH-W

Adapting to SAE with Jerald-Brenda

part#'s A31614 & A33000

ZVH-W cutaway view
       
       
   
  No ingress protection Straight edge demo  
       
   
  Poor ingress protection KMV-150-M example  
   
  KMV-150-M Service Call

Inside cabinet looking out through the condenser coil. Notice: light bulb on

 
       
   
 

Inside cabinet looking out with building lights off. Exterior light bulb shows clean fins

KMV-150-M service call Why the powder? Has a clean condenser coil!

 
   
 

Use foam matress material in an attempt to eliminate EJ alarm

Even the HAVC tech must block airflow when testing. Failure to do so by-passes the condenser coil.

 
       
   
 

Ambient air flow requirement; RATING: 35 degrees C (95 degrees F)

Metric-ambient air passing over at 1 meter/second

English-ambient air passing over at 3.3 feet/second

FAIL: Axial ducting fan replaced by factory arrangement without shroud over condenser coil

 
       
       

   

 

 

Office: (806) 829-2847     Cell: (806) 782-4570     email: myles.opheim@smallchiller.com