HEC-Series Service Manual
SERVICE OPERATIONS
10/21/01
9-19
Note: “X” Valve #53 (air-cooled units only)
FIGURE 9-13
Solenoid Valves
Solenoid Valves.
The solenoid valves (#18, #20 and #53) are pilot-operated with “floating” type
diaphragm. For satisfactory operation, be sure that the manual opening stem, which is located in the
valve bonnet on the outlet side of the Jackes-Evans valve and on the bottom of the Sporlan valve, is
in the “automatic” or “closed” position. These valves require only a quarter turn of the manual stem
to cause valve to remain open.
These valves will operate on voltages within 10% of rating but dirt or sludge will affect the operation.
Care should be taken to assure the enclosing tube is not bent or dented so as to cause the plunger to
stick and prevent proper operation.
Valves should be dismantled (or wrapped with wet rags if valve ends are the extended type) before
applying heat for brazing.
Water Distributors.
The water distributors are located in the distributing head (8) at the top of the
freezer. There are 78 distributors used in models having an “S” suffix (i.e., Models HEC-10S, HEC-
20S, HEC-30S, and HEC-40S); 48 distributors are used in models having an “M” suffix (i.e., Models
HEC-10M, HEC-20M, HEC-30M, and HEC-40M). These may require occasional or periodical
cleaning to remove suspended solids and foreign particles accumulated from the make-up water. The
frequency of this cleaning operation will depend on the characteristics of the water supply.
The cleaning operation is indicated when the inside diameter of a large proportion of the ice becomes
irregular (due to channeling of the water) or if some of the ice is opaque. Or if there is a noticeable
decrease in ice capacity.
To clean distributors, stop the unit and remove the freezer cover (8) on top of the freezer. The water
distributors may then be removed with pliers for cleaning by soaking in a solution of ice machine
cleaner or 10% muratic acid and water. Grasp the top of the distributor gently with pliers, twist, pull
up and out of the tube. After cleaning, reinstall distributors firmly in each tube.
Summary of Contents for HEC-10
Page 1: ...HEC SERVICE MANUAL ...
Page 95: ...HEC Series Service Manual SERVICE OPERATIONS 10 21 01 9 13 FIGURE 9 9 Cutter Water Tank Parts ...
Page 96: ...HEC Series Service Manual SERVICE OPERATIONS 10 21 01 9 14 FIGURE 9 10 Cutter Drive Parts ...
Page 97: ...HEC Series Service Manual SERVICE OPERATIONS 10 21 01 9 15 FIGURE 9 11 Cutter Parts ...
Page 106: ...HEC Series Service Manual MODEL NUMBER STRUCTURE 10 21 01 10 1 10 Model Number Structure ...
