Heatcraft Refrigeration Products H-IM-82B Manual De Usuario

All  

 units are designed for maximum durability, reliability and 

simplicity.  

 comes to you ready for operation, fully charged and 

with all controls preset at the factory. The following information is 

provided as an aid in the event that service is required.

The evaporator section of a  

 system should be checked at 

least once for proper defrosting because the amount and pattern 

of frosting can vary greatly. The frost build-up is dependent on 

the temperature of the room, the type of product being stored, 

how often new product is brought into the room and percentage 

of time the door to the room is open. It may be necessary to 

periodically change the number of defrost cycles or adjust the 

duration of defrost.

After first year of operation and under normal usage, maintenance 

should cover the following items at least once every six months: 

  1.  Check and tighten 

ALL electrical connections.

  2.  Check all wiring and insulators.
  3.  Check contactors for proper operation and for worn  

        contact points.
  4.    Check all fan motors. Tighten motor mount bolts/ nuts  

   

and tighten fan set screws.

  5.    Clean the condenser coil surface.
  6.    Check the operation of the control system. Make certain   

   

all safety controls are operating properly.

  7.    Check that all defrost controls are functioning properly.
  8.    Clean the evaporator coil surface.
  9.    Clean the drain pan and check the drain pan and drain line  
   

  for proper drainage.

  1.  Power is provided to the temperature control, compressor  

   

  contactor and cooler evaporator fans.

  2.  The temperature controller closes and energizes the  

   

compressor contactor, starting the compressor,  

   

evaporator and condenser fan(s).

  3.  When the system reaches the desired box temperature,  

   

the temperature control will de-energize the compressor  

   

contactor. Evaporator fans will continue to operate at  

   

this point.

  4.  When the fixture temperature rises above the set point  

   

and minimum off-time has elapsed, the temperature  

   

control will close and re-energize the compressor contactor.

1.  During normal operation, at the preset time intervals,  

   

  the temperature/defrost control will de-energize the  

   

compressor contactor and evaporator fans and energize 

   

the defrost heaters. These functions are controlled  

   

through relays on the controller.

  2.  When the coil has defrosted fully and has reached the  

   

preset coil temperature (as sensed by the coil  

   

temperature sensor) the defrost heater de-energizes  

   

and the fan delay and drip sequences begin.

  3.  The temperature/defrost control energizes the  

   

compressor contactor, starting the compressor and  

   

condenser fan(s).

  4.  Freezer evaporator fans will be energized by the  

   

temperature/defrost control when the coil temperature  

   

reaches 35°F or fan delay time has elapsed.

freezer units come factory equipped with an electronic 

temperature/defrost control.  There are 2 different models of 

electronic control used and it is important to determine which 

one is present on your unit before altering any factory settings. 

Please refer to the picture of the controller display on this page 

to determine the model used. Instructions for any necessary 

reprogramming are included in this manual on pages 8-10.

The Dixell XR-60CX and the Dixell XR-60C are fully 

configurable electronic refrigeration controllers.  All 

parameter values are reprogrammable and are stored in the 

non-volatile memory. 
The controllers use two levels of programming that can be 

accessed through the keypad.  The first level is the user level.  

It gives access to six settings; temp. differential, defrost cycle 

intervals, defrost termination temperature, draining time, 

defrost fan delay, and fan stop temperature.
The second level is the service level.  It allows access to all 

other parameters.  It is recommended that changes in this 

level be made only by a qualified technician.

XR-60CX Controller                                     XR-60C Controller     

USE OF LEDS
Each LED function is described in the following table.

ON

Compressor enabled

Flashing

-Programming Phase (flashing with )

- Anti-short cycle delay enabled

ON

Defrost enabled

Flashing - Programming Phase (flashing with )

- Drip time in progress

ON

Fans enabled

Flashing

Fans delay after defrost in progress 

(60CX only)

ON

A temperature alarm occurred