HEC-Series Service Manual
MAINTENANCE
10/21/01
7-2
12. Make sure the water tank drain valve is closed, the adjustable blowdown petcock is adjusted
properly, the adjustable blowdown tubing is inserted into the drain bypass line, the “Clean” button
is in the “Off” position, and the selector switch is in the desired ice making position.
13. Push the “Ice” button to the “On” position and push the “Start” button for immediate start-up in
the ice production mode.
Water Distributors.
The water distributors are located under the freezer cover (8) at the top of the
freezer. There are 78 distributors used in the models having an “S” suffix (i.e., Models HEC-10S,
HEC-20S, HEC-30S, and HEC-40S); 48 distributors are used in the models having an “M” suffix
(i.e., Models HEC-10M, HEC-20M, HEC-30M, and HEC-40M). These distributors may require
occasional or periodic cleaning to remove 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 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 (one in each tube) may then be removed with pliers for cleaning. Grasp the top of the
distributor gently with pliers, twist, and pull up to remove the distributor. After cleaning, reinstall
distributors firmly in each tube.
Water Tank.
The production of opaque ice usually indicates that the water in the water tank
contains a concentrated amount of solids or salts or the adjustable blowdown is not opened enough.
See “Adjustable Blowdown”, Section 9.
Remove cover plate. Open drain valve (39). Clean tank thoroughly by flushing out with a hose and
scrubbing with a stiff brush. Fill the water tank with fresh water.
When restarting the machine, be sure that the water pump is circulating water. It is possible that air
may have collected in the pump impeller housing and the pump may have to be stopped and started
several times to expel the air. This procedure can be done by use of “Pump” or “Cutter” circuit
breaker switches and “Start” push button.
Drip Pan.
If the machine is installed on a bin with a drip pan, it is important to keep the drip pan free
of any foreign materials and to keep the drain for this pan open. This drain
must not
run through the
ice compartment of the bin.
Water Cooled Condensers.
Checking operation. How often condensers need cleaning depends on
so many variables that it is impossible to recommend a schedule. Some will seldom need cleaning,
other perhaps need cleaning once a year. In rare cases, cleaning is required several times a year.
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 ...
